Analysis
- max time kernel
91s - max time network
155s - platform
windows10-2004_x64 - resource
win10v2004-20220901-en - resource tags
- submitted
24/10/2022, 07:22
General
- Target P.O. BFL-007756.exe
- Size 6KB
- Sample221024-h68rqafbf3
- SHA256 a46ba907fa55dea9842e0c9a005d71190c7630d033432fa60c5e2996333c3bd9
Malware Config
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
- Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Program crash 1 IoCs
- Suspicious behavior: EnumeratesProcesses 5 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\P.O. BFL-007756.exe"C:\Users\Admin\AppData\Local\Temp\P.O. BFL-007756.exe"1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAANQA2AA==2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Local\Temp\P.O. BFL-007756.exe"C:\Users\Admin\AppData\Local\Temp\P.O. BFL-007756.exe"2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4948 -s 21963⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 4948 -ip 49481⤵
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
P.O. BFL-007756.exe.log
memory/1700-136-0x00000000055B0000-0x0000000005BD8000-memory.dmp
memory/1700-140-0x0000000007B20000-0x000000000819A000-memory.dmp
memory/1700-135-0x0000000004F30000-0x0000000004F66000-memory.dmp
memory/1700-141-0x00000000069D0000-0x00000000069EA000-memory.dmp
memory/1700-137-0x0000000005D90000-0x0000000005DF6000-memory.dmp
memory/1700-138-0x0000000005EB0000-0x0000000005F16000-memory.dmp
memory/1700-139-0x00000000064E0000-0x00000000064FE000-memory.dmp
memory/4800-132-0x00000000009A0000-0x00000000009A8000-memory.dmp
memory/4800-133-0x0000000005F20000-0x0000000005F42000-memory.dmp
memory/4948-143-0x0000000000400000-0x000000000043C000-memory.dmp
memory/4948-145-0x0000000005B30000-0x00000000060D4000-memory.dmp
memory/4948-146-0x0000000005430000-0x00000000054CC000-memory.dmp
memory/4948-147-0x0000000006D00000-0x0000000006D50000-memory.dmp