Analysis
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max time kernel
141s -
max time network
155s -
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 08:53
Static task
static1
Behavioral task
behavioral1
Sample
Ylvclgj.exe
Resource
win7-20230831-en
Behavioral task
behavioral2
Sample
Ylvclgj.exe
Resource
win10v2004-20230915-en
General
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Target
Ylvclgj.exe
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Size
22KB
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MD5
24726d59051982bcb1ded3daedaacb0b
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SHA1
fc2e317d419062860f98f3f0df2f95fcb5ce7718
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SHA256
99c5c57ec66db2b568df0891d6e8d4c6420e1bcd629ef55f7148659c9759e3eb
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SHA512
768d523fb9fbf5b44c8ae784c8525fb04a382fefaa2594a222ba5c44aae48023d7330e3e25e7bd238f31d6b4921931c276836dcf90fa43c5beaf752e306e502d
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SSDEEP
384:eU5ewSdw/L2APL6yRqtxAx+roEOsVK/KO+sB6fOK:FqwCs3RqtGx+roAYP+97
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/4312-9-0x0000000140000000-0x0000000140022000-memory.dmp family_snakekeylogger behavioral2/memory/4312-13-0x000001BAD4FF0000-0x000001BAD5000000-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\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 MSBuild.exe 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 -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
Ylvclgj.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" Ylvclgj.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 61 checkip.dyndns.org -
Suspicious use of SetThreadContext 1 IoCs
Processes:
Ylvclgj.exedescription pid process target process PID 1380 set thread context of 4312 1380 Ylvclgj.exe MSBuild.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
MSBuild.exepid process 4312 MSBuild.exe 4312 MSBuild.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
Ylvclgj.exeMSBuild.exedescription pid process Token: SeDebugPrivilege 1380 Ylvclgj.exe Token: SeDebugPrivilege 4312 MSBuild.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
Ylvclgj.exedescription pid process target process PID 1380 wrote to memory of 4312 1380 Ylvclgj.exe MSBuild.exe PID 1380 wrote to memory of 4312 1380 Ylvclgj.exe MSBuild.exe PID 1380 wrote to memory of 4312 1380 Ylvclgj.exe MSBuild.exe PID 1380 wrote to memory of 4312 1380 Ylvclgj.exe MSBuild.exe PID 1380 wrote to memory of 4312 1380 Ylvclgj.exe MSBuild.exe PID 1380 wrote to memory of 4312 1380 Ylvclgj.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\Ylvclgj.exe"C:\Users\Admin\AppData\Local\Temp\Ylvclgj.exe"1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1380 -
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:4312