RANSOM_HPCRYPTESLA.SMA3
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
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 deletes itself after execution.
TECHNICAL DETAILS
282,624 bytes
EXE
06 May 2016
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 the following copies of itself into the affected system and executes them:
- %User Profile%\Documents\{random filename}.exe
(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)
It drops and executes the following files:
- %Desktop%\-!RecOveR!-{random 5 characters}++.Png
- %Desktop%\-!RecOveR!-{random 5 characters}++.Txt
- %Desktop%\-!RecOveR!-{random 5 characters}++.Htm
(Note: %Desktop% is the desktop folder, where it usually is C:\Documents and Settings\{user name}\Desktop in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\Desktop in 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.)
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} = C:\WINDOWS\SYSTEM32\CMD.EXE /C START "" "%Uses Profile%\Documents\{random filename}.exe"
Dropping Routine
This Trojan drops the following files:
- %User Profile%\Documents\-!recover!-!file!-.txt
- %User Profile%\Documents\desctop._ini
- {folders containing encrypted files}\-!RecOveR!-{random 5 characters}++.Png
- {folders containing encrypted files}\-!RecOveR!-{random 5 characters}++.Txt
- {folders containing encrypted files}\-!RecOveR!-{random 5 characters}++.Htm
(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://{BLOCKED}ightwithmysite.com/sys_info.php
- http://{BLOCKED}l.com/sys_init.php
- http://{BLOCKED}rimbebeautiful.com.au/sys_init.php
- http://{BLOCKED}eriedelareine.fr/sys_init.php
- http://{BLOCKED}eambd.com/inifile.php
- http://{BLOCKED}eambd.com/wp-admin/setup-config.php
- http://{BLOCKED}o.com/inifile.php
It deletes itself after execution.