TROJ_MATSNU.WXC
TrojanDropper:Win32/Ropest.A (MICROSOFT), Trojan.Win32.Yakes.gxii (KASPERSKY)
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
Downloaded from the Internet
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It modifies the Internet Explorer Zone Settings.
It steals certain information from the system and/or the user.
TECHNICAL DETAILS
206,336 bytes
EXE
No
02 Apr 2016
Connects to URLs/IPs, Steals information
Arrival Details
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Installation
This Trojan drops a copy of itself in the following folders using different file names:
- %User Temp%\{random folder name}\{random name}.exe
(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
It drops and executes the following files:
- %User Temp%\{random value}.bat - deleted
(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
It creates the following folders:
- %User Temp\{random folder name}
It adds the following mutexes to ensure that only one of its copies runs at any one time:
- MAIN{crc32}MUTEX
- COPY{crc32}MUTEX
- CURRENT{crc32}MUTEX
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
(random file name 1) = "%User Temp%\{random folder name}\{random file name}.exe"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunOnce
(random file name 1) = "%User Temp%\{random folder name}\{random file name}.exe"
File Infection
This Trojan infects the following files:
- arp.exe
- at.exe
- attrib.exe
- bootcfg.exe
- cacls.exe
- calc.exe
- charmap.exe
- chkdsk.exe
- chkntfs.exe
- cipher.exe
- cleanmgr.exe
- cmdl32.exe
- cmmon32.exe
- compact.exe
- convert.exe
- diskperf.exe
- dplaysvr.exe
- dpnsvr.exe
- driverquery.exe
- dvdplay.exe
- dvdupgrd.exe
- dwwin.exe
- dxdiag.exe
- eventcreate.exe
- expand.exe
- extrac32.exe
- find.exe
- fixmapi.exe
- fltmc.exe
- fontview.exe
- fsutil.exe
- ftp.exe
- gpresult.exe
- gpupdate.exe
- grpconv.exe
- iexpress.exe
- ipconfig.exe
- label.exe
- lodctr.exe
- logagent.exe
- mobsync.exe
- net1.exe
- netstat.exe
- notepad.exe
- openfiles.exe
- ping.exe
- powercfg.exe
- presentationhost.exe
- print.exe
- proquota.exe
- rasautou.exe
- rasdial.exe
- rasphone.exe
- recover.exe
- reg.exe
- regini.exe
- regsvr32.exe
- relog.exe
- runas.exe
- rundll32.exe
- runonce.exe
- sc.exe
- sethc.exe
- sfc.exe
- shutdown.exe
- sort.exe
- subst.exe
- systeminfo.exe
- taskkill.exe
- tasklist.exe
- taskmgr.exe
- tcpsvcs.exe
- tracerpt.exe
- typeperf.exe
- unlodctr.exe
- utilman.exe
- vssadmin.exe
- w32tm.exe
- wextract.exe
- wiaacmgr.exe
- wpdshextautoplay.exe
- wscript.exe
- xcopy.exe
Web Browser Home Page and Search Page Modification
This Trojan modifies the Internet Explorer Zone Settings.
Information Theft
This Trojan steals the following information:
- Username
- Machine name
- Windows Version
- User Default Language
- System Default Language
- Processor Information
- Graphical Card Information
- Drive information
- Virtual Environment Detected
- Installed AV
Stolen Information
This Trojan sends the gathered information via HTTP POST to the following URL:
- http://{generated domains}/search.php?{random char}={encrypted value}&{random char 2}={encrypted value}&{random char 3}={encrypted value}
Other Details
This Trojan connects to the following possibly malicious URL:
- http://www.{BLOCKED}ic.com/forsale/CaribbeanBank.com?utm_campaign=tdfs_namefind&traffic_id=Namefind&traffic_type=TDFS/search.php?pkvn=jJMbftkfwbrVFopFeC&yg=UbAoGDZeiL&dxjd=enfXF
It checks for the presence of the following process(es):
- avgcsrvx.exe
- avgemcx.exe
- avgidsagent.exe
- avgnsx.exe
- avgrsx.exe
- avgtray.exe
- avgwdsvc.exe
- vprot.exe
- toolbarupdater.exe
- avgfws.exe
- avastsvc.exe
- avastui.exe
- afwserv.exe
- avguard.exe
- avshadow.exe
- avgnt.exe
- sched.exe
- avwebgrd.exe
- avmailc.exe
- avfwsvc.exe
- egui.exe
- ekrn.exe
- dwengine.exe
- dwservice.exe
- dwnetfilter.exe
- frwl_svc.exe
- frwl_notify.exe
- spideragent.exe
- avp.exe
- op_mon.exe
- acs.exe
- ccsvchst.exe
- elogsvc.exe
- nhs.exe
- nigsvc32.exe
- niguser.exe
- njeeves.exe
- nnf.exe
- npfsvc32.exe
- npfuser.exe
- nprosec.exe
- npsvc32.exe
- nsesvc.exe
- nvcoas.exe
- nvoy.exe
- zanda.exe
- zlh.exe
- popwndexe.exe
- ravmond.exe
- rsmgrsvc.exe
- rstray.exe
- cfp.exe
- clps.exe
- clpsls.exe
- cmdagent.exe
- unsecapp.exe
- avkproxy.exe
- avkservice.exe
- avktray.exe
- avkwctl.exe
- gdscan.exe
- gdfirewalltray.exe
- gdfwsvc.exe
- akvbackupservice.exe
- tsnxgservice.exe
- bdagent.exe
- vsserv.exe
- updatesrv.exe
- uiwatchdog.exe
- coreserviceshell.exe
- coreframeworkhost.exe
- uiseagnt.exe
- pctssvc.exe
- pctsauxs.exe
- pctsgui.exe
- fpavserver.exe
- fprottray.exe
- agent.exe
- iptray.exe
- psimsvc.exe
- pshost.exe
- pavsrvx86.exe
- psctrls.exe
- pavjobs.exe
- psksvc.exe
- pavfnsvr.exe
- tpsrv.exe
- webproxy.exe
- avengine.exe
- pavprsrv.exe
- srvload.exe
- apvxdwin.exe
- pavbckpt.exe
- fsorsp.exe
- fsgk32st.exe
- fshoster32.exe
- fsgk32.exe
- fsma32.exe
- fsdfwd.exe
- fsm32.exe
- msseces.exe
- mcagent.exe
- mcshield.exe
- mcsvhost.exe
- mfefire.exe
- mfevtps.exe
- mcpvtray.exe
- bullguard.exe
- bullguardbhvscanner.exe
- bullguardscanner.exe
- bullguardupdate.exe
- emlproxy.exe
- onlinent.exe
- opssvc.exe
- quhlsvc.exe
- sapissvc.exe
- scanmsg.exe
- scanwscs.exe
- sbamsvc.exe
- sbantray.exe
- sbpimsvc.exe
- vbcmserv.exe
- vbsystry.exe
- adaware.exe
- adawarebp.exe
- adawareservice.exe
- wajamupdater.exe
- arcaconfsv.exe
- arcamainsv.exe
- arcaremotesvc.exe
- arcataskservice.exe
- avmenu.exe
- guardxkickoff.exe
- guardxservicce.exe
- confirm.dll
- core.dll
- flash.dll
- imun.dll
- imunsvc.exe
- share.dll
- panda_url_filtering.exe
- psanhost.exe
- psunmain.exe
- solocfg.exe
- solosent.exe
- vba32ldr.exe
- vbascheduler.exe
NOTES:
This malware checks virtual environment by checking the following strings in the registry keys:
- HARDWARE\ACPI\DSDT\PTLTD_ - VMware
- HARDWARE\ACPI\DSDT\VBOX__ - Vbox
- HARDWARE\ACPI\DSDT\AMIBI - VirtualPC
It randomly the processes it infects from its list then executes the infected file.
It uses the following list to generate domains:
- accordance
- acids
- acidsexpo
- adjustable
- adsl
- adventurelaptops
- advertflagsfontmoves
- affiliatedhypothesis
- afterwards
- airlinestobaccobennettlongitude
- alerts
- alumni
- analengland
- announce
- anybody
- anywhere
- appear
- appliancespointed
- applying
- appraisalearned
- aprildisturbed
- arrestedparts
- arrivals
- assisted
- athletics
- attachments
- attempts
- avoiding
- awesome
- awful
- axis
- bachelorconnections
- backup
- bacterial
- balanceinsider
- bangladeshbelfastsimsinner
- barbaraemployersiemensgiant
- bean
- bedroom
- begins
- benjamin
- biologicaldiscretion
- biotechnology
- blow
- body
- bossletting
- brandon
- breaking
- breasts
- brideowen
- britannica
- broadcasthostelslisalargely
- brooksbrowserspicksharder
- browse
- bulgaria
- bundle
- butter
- cable
- cambridge
- captured
- carter
- cathedralreload
- cavecells
- cells
- certification
- challenging
- chamberssexualityaddressentering
- chancellor
- changepreparingextendsnothing
- channel
- channels
- cheese
- cheque
- cialislaid
- clearance
- clicks
- comfortbuilding
- commentary
- communications
- compatibilitypleasantelectionreasoning
- competing
- complicatedcastjacksonvillebreaks
- congo
- consolidation
- contractorswholesale
- contrary
- contribution
- convictionconvertible
- cooperation
- correlation
- country
- coursestrembl
- cradle
- creating
- creative
- creativeamericaclass
- crossword
- current
- curve
- custom
- customs
- customsparticipating
- dangerous
- davidroman
- degrees
- demand
- demo
- democraticprovide
- denver
- designstockings
- desktop
- development
- developments
- dildo
- directions
- discretionpenis
- disk
- disposal
- disputestunning
- diverse
- divisions
- donate
- donated
- downtown
- drain
- drugs
- edmonton
- effective
- empireconsideration
- employeeapril
- employees
- encoding
- enjoyed
- equally
- errors
- estimate
- evaluatedplots
- examining
- executed
- expedia
- expired
- explained
- explorer
- farm
- ferrarispin
- films
- finishing
- finland
- flame
- floyd
- flyer
- fonts
- forum
- franchise
- frederick
- freely
- freight
- gathered
- gazette
- gentleman
- george
- gilbert
- gore
- guatemala
- hall
- headers
- heardturneralexandriavaries
- heated
- herbs
- here
- highs
- hikingcharmproprietaryrecognition
- holes
- hometownlengthasciitelecharger
- honda
- hydraulicresolutionjavascriptbands
- immediately
- important
- indexadultsfindercharges
- indigenousbasicreliefwish
- induction
- infinite
- informativeincurred
- innovative
- insights
- insightsgottainvited
- instant
- instructor
- integer
- interests
- internal
- internship
- interracial
- intimate
- intranetsample
- involving
- jakegirl
- jean
- jerusalem
- jewish
- jordanmixturegenreseconomies
- judge
- karmahowever
- keys
- kidneycannon
- laser
- lawyerlows
- lens
- liable
- lists
- logan
- longer
- loud
- lucy
- mails
- makes
- mapsproducts
- marcusharvest
- mark
- marsh
- massachusetts
- materials
- meal
- mediterraneanfranchise
- meetuplenders
- memberapprox
- mineshalifaxolivedear
- motherboardproblems
- movedwiki
- muchcontainingarisingacdbentity
- musician
- ncaa
- nearly
- necessarilyindicatesurveysprogrammer
- networking
- newcastlerecordings
- nicole
- nitrogengottainvited
- noble
- nuke
- nvidiaacdbentity
- observation
- occasions
- odds
- offensive
- official
- oliveoasis
- olympics
- omegacomedy
- operational
- opticalamericaclass
- optimalmailed
- orbit
- organizations
- orlandoyields
- palace
- panel
- parallel
- particular
- passengers
- passespassenger
- pens
- perceived
- perhaps
- personnel
- photographic
- phrases
- planetstadium
- portableaccusedstructuredwall
- pregnancy
- prescribed
- preservation
- principles
- prisoner
- private
- procedures
- process
- productions
- projector
- promised
- protest
- providers
- province
- provincescedar
- pushed
- putting
- queen
- queue
- quotestiles
- ranch
- reached
- realtyautomotiveinvolvingfares
- rebate
- rebel
- reed
- referringdecision
- regards
- rendered
- reproductionstatistics
- respiratory
- respondents
- restructuring
- rosa
- rulesguests
- runner
- ruth
- said
- scenario
- scenarioelvis
- secret
- seed
- sega
- selecting
- setsfederal
- shadows
- shares
- shineemphasis
- showers
- simulations
- singlesdistributor
- sixth
- skins
- spaces
- speaker
- specgardeningallahhandhelds
- speedcomplaints
- spousedesktops
- stone
- strange
- streams
- strong
- subcommitteebeans
- submission
- subscriber
- successfulottawa
- supportingcedar
- suppose
- surname
- survey
- swaziland
- syndicate
- tackleproductivity
- tear
- tears
- temp
- thee
- thehun
- thus
- toddler
- tonight
- tony
- traffic
- travelersponsored
- twenty
- twinsdrilling
- untitled
- update
- upload
- vacation
- vaccine
- vegetation
- versioncertainly
- viagradiffertomatoreverse
- victimskilling
- violentmalawi
- virtually
- waiver
- webcams
- weeks
- welding
- whatscattle
- which
- wildlife
- writers
- wyoming
- xerox
- yukon
- zoning
The following is a list of URL parameters posted to C&C:
get=sysinfo id={unique id}&mynum={target process}&ver={windows version}&cvr={value}&threadid={infected thread}lang={system default language}&os={os}&crcblw={crc}
get=cmd dlllist={list of requested files}&proclist={list of processes} GET={info of infected machines and command}&AES={random key}
get=raport
get=config idt={id}&code={code}
The following are backdoor commands it uses:
- WAIT
- --- WAIT ---
- DLLLIST
- PROCLIST
- BLWORDS
SOLUTION
9.800
12.388.04
07 Mar 2016
12.389.00
08 Mar 2016
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Step 2
Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.
Step 3
Restart in Safe Mode
Step 4
Search and delete these folders
- %User Temp\{random folder name}
Step 5
Delete this registry value
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
- (random file name 1) = "%User Temp%\{random folder name}\{random file name}.exe"
- (random file name 1) = "%User Temp%\{random folder name}\{random file name}.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- (random file name 1) = "%User Temp%\{random folder name}\{random file name}.exe"
- (random file name 1) = "%User Temp%\{random folder name}\{random file name}.exe"
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_MATSNU.WXC. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.
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