Analysis
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max time kernel
121s -
max time network
141s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
30-06-2024 14:23
Static task
static1
Behavioral task
behavioral1
Sample
LETTER OF AUTHORIZATION.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
LETTER OF AUTHORIZATION.exe
Resource
win10v2004-20240508-en
General
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Target
LETTER OF AUTHORIZATION.exe
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Size
3.0MB
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MD5
57cb0d1fbbe7e57e906d9bec624ff50f
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SHA1
d8eeb1c8e4530d619c7a5927fec5fcc892e0b24f
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SHA256
235feecbf39c506144e406ee52d764d830e5124d113280a5e339bf3bdee978a5
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SHA512
7d0be14e10f4174648cb597b9f8b32883088b9fed59cd4812339cdb379746e49b58dfb357d733fcb9b73c725451b64f6588e328518091b6311ef38c1dc41d886
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SSDEEP
12288:RaoerDVWSJRvp61xGNoQOgR4FeGQ5fzF2M9PbxyWnnMRGIliKj:RinVl1Yeo0R4FeHX2qwRFj
Malware Config
Extracted
snakekeylogger
Protocol: smtp- Host:
valleycountysar.org - Port:
26 - Username:
[email protected] - Password:
fY,FLoadtsiF
Signatures
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Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
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Snake Keylogger payload 5 IoCs
Processes:
resource yara_rule behavioral1/memory/2112-8-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/2112-13-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/2112-10-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/2112-15-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/2112-17-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger -
Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
Processes:
jsc.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 jsc.exe Key opened \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 jsc.exe Key opened \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 jsc.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 4 checkip.dyndns.org -
Suspicious use of SetThreadContext 1 IoCs
Processes:
LETTER OF AUTHORIZATION.exedescription pid process target process PID 856 set thread context of 2112 856 LETTER OF AUTHORIZATION.exe jsc.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
jsc.exepid process 2112 jsc.exe 2112 jsc.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
jsc.exedescription pid process Token: SeDebugPrivilege 2112 jsc.exe -
Suspicious use of WriteProcessMemory 16 IoCs
Processes:
LETTER OF AUTHORIZATION.exedescription pid process target process PID 856 wrote to memory of 2536 856 LETTER OF AUTHORIZATION.exe AddInProcess32.exe PID 856 wrote to memory of 2536 856 LETTER OF AUTHORIZATION.exe AddInProcess32.exe PID 856 wrote to memory of 2536 856 LETTER OF AUTHORIZATION.exe AddInProcess32.exe PID 856 wrote to memory of 2536 856 LETTER OF AUTHORIZATION.exe AddInProcess32.exe PID 856 wrote to memory of 2112 856 LETTER OF AUTHORIZATION.exe jsc.exe PID 856 wrote to memory of 2112 856 LETTER OF AUTHORIZATION.exe jsc.exe PID 856 wrote to memory of 2112 856 LETTER OF AUTHORIZATION.exe jsc.exe PID 856 wrote to memory of 2112 856 LETTER OF AUTHORIZATION.exe jsc.exe PID 856 wrote to memory of 2112 856 LETTER OF AUTHORIZATION.exe jsc.exe PID 856 wrote to memory of 2112 856 LETTER OF AUTHORIZATION.exe jsc.exe PID 856 wrote to memory of 2112 856 LETTER OF AUTHORIZATION.exe jsc.exe PID 856 wrote to memory of 2112 856 LETTER OF AUTHORIZATION.exe jsc.exe PID 856 wrote to memory of 2112 856 LETTER OF AUTHORIZATION.exe jsc.exe PID 856 wrote to memory of 3040 856 LETTER OF AUTHORIZATION.exe WerFault.exe PID 856 wrote to memory of 3040 856 LETTER OF AUTHORIZATION.exe WerFault.exe PID 856 wrote to memory of 3040 856 LETTER OF AUTHORIZATION.exe WerFault.exe -
outlook_office_path 1 IoCs
Processes:
jsc.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 jsc.exe -
outlook_win_path 1 IoCs
Processes:
jsc.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 jsc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\LETTER OF AUTHORIZATION.exe"C:\Users\Admin\AppData\Local\Temp\LETTER OF AUTHORIZATION.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"2⤵
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe"2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
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C:\Windows\system32\WerFault.exeC:\Windows\system32\WerFault.exe -u -p 856 -s 6282⤵
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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memory/856-0-0x000007FEF5A13000-0x000007FEF5A14000-memory.dmpFilesize
4KB
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memory/856-1-0x00000000009C0000-0x00000000009C8000-memory.dmpFilesize
32KB
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memory/856-2-0x0000000000340000-0x00000000003BA000-memory.dmpFilesize
488KB
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memory/856-3-0x000007FEF5A10000-0x000007FEF63FC000-memory.dmpFilesize
9.9MB
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memory/856-21-0x000007FEF5A10000-0x000007FEF63FC000-memory.dmpFilesize
9.9MB
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memory/856-20-0x000007FEF5A13000-0x000007FEF5A14000-memory.dmpFilesize
4KB
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memory/2112-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmpFilesize
4KB
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memory/2112-13-0x0000000000400000-0x0000000000426000-memory.dmpFilesize
152KB
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memory/2112-8-0x0000000000400000-0x0000000000426000-memory.dmpFilesize
152KB
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memory/2112-10-0x0000000000400000-0x0000000000426000-memory.dmpFilesize
152KB
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memory/2112-15-0x0000000000400000-0x0000000000426000-memory.dmpFilesize
152KB
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memory/2112-17-0x0000000000400000-0x0000000000426000-memory.dmpFilesize
152KB
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memory/2112-18-0x000000007480E000-0x000000007480F000-memory.dmpFilesize
4KB
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memory/2112-19-0x0000000074800000-0x0000000074EEE000-memory.dmpFilesize
6.9MB
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memory/2112-4-0x0000000000400000-0x0000000000426000-memory.dmpFilesize
152KB
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memory/2112-6-0x0000000000400000-0x0000000000426000-memory.dmpFilesize
152KB
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memory/2112-22-0x000000007480E000-0x000000007480F000-memory.dmpFilesize
4KB
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memory/2112-23-0x0000000074800000-0x0000000074EEE000-memory.dmpFilesize
6.9MB