Analysis
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max time kernel
206s -
max time network
230s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
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submitted
29-11-2022 13:23
General
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Target
BBKU39-2022-KTC.exe
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Size
789KB
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MD5
72c17e8d702de79f794fe16787a61098
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SHA1
18f51344f688db3979c55a6322f013269b4c308d
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SHA256
4513951a7d2bdb62b062c790f0c259d9f5854497b6e5e8ed0369d22197d1e856
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SHA512
09ca148f810649989cb89507848de48d55738f79bc301e4a7c8b2f3b52bc231b59aa79c15be126eb7c41a2d8801279792eb21a262b45e0503a8c93eca26fec43
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SSDEEP
12288:OKdsCbFr5cE8LHWy/SEdRMA/LyzIPPPu6gtFNDzUwSzWbTgvS6/IiTHWcb:7ovLB9/LkInstFxQvCngv5/1db
Malware Config
Extracted
agenttesla
Protocol: smtp- Host:
mail.strictfacilityservices.com - Port:
587 - Username:
accounts@strictfacilityservices.com - Password:
SFS!@#321 - Email To:
guc850155@gmail.com
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
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Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
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Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
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Suspicious use of SetThreadContext 1 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 4 IoCs
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Suspicious use of AdjustPrivilegeToken 2 IoCs
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Suspicious use of WriteProcessMemory 11 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\BBKU39-2022-KTC.exe"C:\Users\Admin\AppData\Local\Temp\BBKU39-2022-KTC.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\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GDqcmzjrs" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8B82.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\BBKU39-2022-KTC.exe"{path}"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\tmp8B82.tmpFilesize
1KB
MD56481b654c2b2eeca624a46943df07af2
SHA13170aa11f999572674a2cf6af56a1fb04b591978
SHA256f861c60ec32628ab05460770ccecec8e9c29c8877371f9f2906d7db78d8acb33
SHA512ee434febb40b17ca618ce138d7e5117e092b3e51246892991cfd9ad139ae8136a35673042b08c990b0fa750f5b3ea4e6ec3c29c2ba443bcce39ba5c48fca839e
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memory/1364-137-0x0000000000000000-mapping.dmp
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memory/2128-139-0x0000000000000000-mapping.dmp
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memory/2128-140-0x0000000000400000-0x000000000043C000-memory.dmpFilesize
240KB
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memory/2128-141-0x0000000006190000-0x00000000061F6000-memory.dmpFilesize
408KB
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memory/2128-142-0x0000000006E40000-0x0000000006E90000-memory.dmpFilesize
320KB
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memory/3632-132-0x0000000000780000-0x000000000084C000-memory.dmpFilesize
816KB
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memory/3632-133-0x00000000057E0000-0x0000000005D84000-memory.dmpFilesize
5.6MB
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memory/3632-134-0x0000000005230000-0x00000000052C2000-memory.dmpFilesize
584KB
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memory/3632-135-0x00000000052D0000-0x000000000536C000-memory.dmpFilesize
624KB
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memory/3632-136-0x00000000051E0000-0x00000000051EA000-memory.dmpFilesize
40KB