Analysis
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max time kernel
143s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20230915-en -
resource tags
arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system -
submitted
10-10-2023 08:51
Static task
static1
Behavioral task
behavioral1
Sample
Ucaai.exe
Resource
win7-20230831-en
Behavioral task
behavioral2
Sample
Ucaai.exe
Resource
win10v2004-20230915-en
General
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Target
Ucaai.exe
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Size
590KB
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MD5
a3128c8b67fd08ae19dd966bef878cb4
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SHA1
8e636f183d7185b23f9894bad847d1ada4561252
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SHA256
afea8e29447ebe85480428e2ad947457d515968694dcb5d721886ad1d5945459
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SHA512
caf3e8071c53c0838514110658a36deff6f90a205b941010537a95f8650181a16ca9c1776e2593bce52cea440fa7348937ff928e28b8553bb0f00201403a8fc5
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SSDEEP
12288:4ES8ryazt80P6Etvu/2oALepFUAPU5bJb+a2HbTFDBWELTpKHf:4UJnLepFUAPU59bObTNL/YHf
Malware Config
Extracted
snakekeylogger
https://api.telegram.org/bot6356895858:AAHmcm_akjP0cvCFDNWqZ-6D8aFLszf0BKU/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/1720-10-0x0000000140000000-0x0000000140022000-memory.dmp family_snakekeylogger behavioral2/memory/1720-14-0x0000018B0DDD0000-0x0000018B0DDE0000-memory.dmp family_snakekeylogger -
Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
Processes:
MSBuild.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 MSBuild.exe Key opened \REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 MSBuild.exe Key opened \REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 MSBuild.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
Ucaai.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ddddddd = "C:\\Users\\Admin\\AppData\\Roaming\\ddddddd.exe" Ucaai.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 59 checkip.dyndns.org -
Suspicious use of SetThreadContext 1 IoCs
Processes:
Ucaai.exedescription pid process target process PID 3836 set thread context of 1720 3836 Ucaai.exe MSBuild.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
MSBuild.exepid process 1720 MSBuild.exe 1720 MSBuild.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
Ucaai.exeMSBuild.exedescription pid process Token: SeDebugPrivilege 3836 Ucaai.exe Token: SeDebugPrivilege 1720 MSBuild.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
Ucaai.exedescription pid process target process PID 3836 wrote to memory of 1720 3836 Ucaai.exe MSBuild.exe PID 3836 wrote to memory of 1720 3836 Ucaai.exe MSBuild.exe PID 3836 wrote to memory of 1720 3836 Ucaai.exe MSBuild.exe PID 3836 wrote to memory of 1720 3836 Ucaai.exe MSBuild.exe PID 3836 wrote to memory of 1720 3836 Ucaai.exe MSBuild.exe PID 3836 wrote to memory of 1720 3836 Ucaai.exe MSBuild.exe -
outlook_office_path 1 IoCs
Processes:
MSBuild.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\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-1-5-21-1574508946-349927670-1185736483-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 MSBuild.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Ucaai.exe"C:\Users\Admin\AppData\Local\Temp\Ucaai.exe"1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3836 -
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:1720