Analysis
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max time kernel
142s -
max time network
145s -
platform
windows10-2004_x64 -
resource
win10v2004-20230915-en -
resource tags
arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system -
submitted
29-09-2023 08:54
Static task
static1
Behavioral task
behavioral1
Sample
Trmczi.exe
Resource
win7-20230831-en
Behavioral task
behavioral2
Sample
Trmczi.exe
Resource
win10v2004-20230915-en
General
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Target
Trmczi.exe
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Size
390KB
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MD5
ca67abf1fa1beb803fc9ec496c68fe2e
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SHA1
8f12daafc220b31bc9fa734fc8d9bf2075e1a765
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SHA256
e3a15c6736497a59a062eb612e69a68938b55266cdaa9dd03b20f3d3f4b784ce
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SHA512
f32812b6640b72d1556e64d92cf2ff5e22df0a2d36980ac3c7886bb11d8a3649c6bca0abb260620c4b35f4c80a8aa78f4119a6cf445b04c89a523796fa4e6ef9
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SSDEEP
6144:1SItb2zQLw8XgTQedTHbLYKWYse50nE3QwYS5uIFXMgZTbc3OBZFNA9668NbZ+fa:1VLJDiwKzmwYS5sgZTbc3OBZFfbZ+fa
Malware Config
Extracted
snakekeylogger
https://api.telegram.org/bot6563963046:AAGlyBHZ_ALQCHnOUZcYa0FHqP2za43gVaM/sendMessage?chat_id=5262627523
Signatures
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Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
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Snake Keylogger payload 2 IoCs
Processes:
resource yara_rule behavioral2/memory/4588-9-0x0000000140000000-0x0000000140022000-memory.dmp family_snakekeylogger behavioral2/memory/4588-13-0x000002C56B660000-0x000002C56B670000-memory.dmp family_snakekeylogger -
Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
Processes:
MSBuild.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-2344688013-2965468717-2034126-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 MSBuild.exe Key opened \REGISTRY\USER\S-1-5-21-2344688013-2965468717-2034126-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 MSBuild.exe Key opened \REGISTRY\USER\S-1-5-21-2344688013-2965468717-2034126-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 MSBuild.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
Trmczi.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2344688013-2965468717-2034126-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dddddd = "C:\\Users\\Admin\\AppData\\Roaming\\dddddd.exe" Trmczi.exe -
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 70 checkip.dyndns.org -
Suspicious use of SetThreadContext 1 IoCs
Processes:
Trmczi.exedescription pid process target process PID 640 set thread context of 4588 640 Trmczi.exe MSBuild.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
MSBuild.exepid process 4588 MSBuild.exe 4588 MSBuild.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
Trmczi.exeMSBuild.exedescription pid process Token: SeDebugPrivilege 640 Trmczi.exe Token: SeDebugPrivilege 4588 MSBuild.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
Trmczi.exedescription pid process target process PID 640 wrote to memory of 4588 640 Trmczi.exe MSBuild.exe PID 640 wrote to memory of 4588 640 Trmczi.exe MSBuild.exe PID 640 wrote to memory of 4588 640 Trmczi.exe MSBuild.exe PID 640 wrote to memory of 4588 640 Trmczi.exe MSBuild.exe PID 640 wrote to memory of 4588 640 Trmczi.exe MSBuild.exe PID 640 wrote to memory of 4588 640 Trmczi.exe MSBuild.exe -
outlook_office_path 1 IoCs
Processes:
MSBuild.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-2344688013-2965468717-2034126-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 MSBuild.exe -
outlook_win_path 1 IoCs
Processes:
MSBuild.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-2344688013-2965468717-2034126-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 MSBuild.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Trmczi.exe"C:\Users\Admin\AppData\Local\Temp\Trmczi.exe"1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:640 -
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:4588