Analysis
- max time kernel
143s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20220901-en - resource tags
- submitted
03/10/2022, 15:53
General
- Target vbc.exe
- Size 1001KB
- Sample221003-tbmfsadffp
- SHA256 50839e417be89600af4b8f90a4b464c41956339f9ea396f4bedd3fcd1204d73e
Malware Config
Extracted
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snakekeylogger
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Protocol
smtp
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Host
us2.smtp.mailhostbox.com
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Port
587
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Username
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Password
LYSV$*b4
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Email to
Signatures
- Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
- Snake Keylogger payload 1 IoCs
- 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.
- Uses the VBS compiler for execution 1 TTPs
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
- Looks up external IP address via web service 1 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.
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 5 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\vbc.exe"C:\Users\Admin\AppData\Local\Temp\vbc.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- 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" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\JvfzGycr.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\JvfzGycr" /XML "C:\Users\Admin\AppData\Local\Temp\tmp589F.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\vbc.exe"C:\Users\Admin\AppData\Local\Temp\vbc.exe"2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
vbc.exe.log
tmp589F.tmp
memory/3420-153-0x00000000077F0000-0x0000000007E6A000-memory.dmp
memory/3420-156-0x0000000007430000-0x00000000074C6000-memory.dmp
memory/3420-159-0x00000000074D0000-0x00000000074D8000-memory.dmp
memory/3420-158-0x00000000074F0000-0x000000000750A000-memory.dmp
memory/3420-150-0x0000000007050000-0x0000000007082000-memory.dmp
memory/3420-140-0x0000000004910000-0x0000000004946000-memory.dmp
memory/3420-146-0x0000000004EE0000-0x0000000004F02000-memory.dmp
memory/3420-157-0x00000000073E0000-0x00000000073EE000-memory.dmp
memory/3420-147-0x00000000058E0000-0x0000000005946000-memory.dmp
memory/3420-143-0x0000000004F80000-0x00000000055A8000-memory.dmp
memory/3420-155-0x0000000007220000-0x000000000722A000-memory.dmp
memory/3420-154-0x00000000071B0000-0x00000000071CA000-memory.dmp
memory/3420-151-0x0000000070C30000-0x0000000070C7C000-memory.dmp
memory/3420-152-0x0000000006450000-0x000000000646E000-memory.dmp
memory/3420-148-0x0000000005E90000-0x0000000005EAE000-memory.dmp
memory/3980-134-0x0000000005440000-0x00000000054D2000-memory.dmp
memory/3980-132-0x0000000000970000-0x0000000000A70000-memory.dmp
memory/3980-135-0x0000000005410000-0x000000000541A000-memory.dmp
memory/3980-133-0x0000000005AB0000-0x0000000006054000-memory.dmp
memory/3980-137-0x0000000007FA0000-0x0000000008006000-memory.dmp
memory/3980-136-0x0000000007C70000-0x0000000007D0C000-memory.dmp
memory/4160-149-0x0000000006BB0000-0x0000000006D72000-memory.dmp
memory/4160-144-0x0000000000400000-0x0000000000426000-memory.dmp