Analysis
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max time kernel
95s -
max time network
86s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
12-04-2024 22:13
Static task
static1
Behavioral task
behavioral1
Sample
MrsMajor3.0.exe
Resource
win7-20240215-en
General
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Target
MrsMajor3.0.exe
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Size
381KB
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MD5
35a27d088cd5be278629fae37d464182
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SHA1
d5a291fadead1f2a0cf35082012fe6f4bf22a3ab
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SHA256
4a75f2db1dbd3c1218bb9994b7e1c690c4edd4e0c1a675de8d2a127611173e69
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SHA512
eb0be3026321864bd5bcf53b88dc951711d8c0b4bcbd46800b90ca5116a56dba22452530e29f3ccbbcc43d943bdefc8ed8ca2d31ba2e7e5f0e594f74adba4ab5
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SSDEEP
6144:Th3idhONY259BH1DzJ5PzVNtGgc+F9TBd096cTKAsLEbqqbd+VWM8AHiKn9SlXNA:Th3iXPw9Tc6kVXMHHLEf8l7
Malware Config
Signatures
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Processes:
wscript.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" wscript.exe -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
wscript.exeMrsMajor3.0.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2177723727-746291240-1644359950-1000\Control Panel\International\Geo\Nation wscript.exe Key value queried \REGISTRY\USER\S-1-5-21-2177723727-746291240-1644359950-1000\Control Panel\International\Geo\Nation MrsMajor3.0.exe -
Executes dropped EXE 1 IoCs
Processes:
eulascr.exepid process 2640 eulascr.exe -
Loads dropped DLL 1 IoCs
Processes:
eulascr.exepid process 2640 eulascr.exe -
Obfuscated with Agile.Net obfuscator 2 IoCs
Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\3875.tmp\eulascr.exe agile_net behavioral2/memory/2640-8-0x00000000003A0000-0x00000000003CA000-memory.dmp agile_net -
Legitimate hosting services abused for malware hosting/C2 1 TTPs 1 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
eulascr.exedescription pid process Token: SeDebugPrivilege 2640 eulascr.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
MrsMajor3.0.exewscript.exedescription pid process target process PID 4304 wrote to memory of 1456 4304 MrsMajor3.0.exe wscript.exe PID 4304 wrote to memory of 1456 4304 MrsMajor3.0.exe wscript.exe PID 1456 wrote to memory of 2640 1456 wscript.exe eulascr.exe PID 1456 wrote to memory of 2640 1456 wscript.exe eulascr.exe -
System policy modification 1 TTPs 2 IoCs
Processes:
wscript.exedescription ioc process Key created \REGISTRY\MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\System wscript.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" wscript.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\MrsMajor3.0.exe"C:\Users\Admin\AppData\Local\Temp\MrsMajor3.0.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\wscript.exe"C:\Windows\system32\wscript.exe" C:\Users\Admin\AppData\Local\Temp\3875.tmp\3876.tmp\3877.vbs //Nologo2⤵
- UAC bypass
- Checks computer location settings
- Suspicious use of WriteProcessMemory
- System policy modification
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C:\Users\Admin\AppData\Local\Temp\3875.tmp\eulascr.exe"C:\Users\Admin\AppData\Local\Temp\3875.tmp\eulascr.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\werfault.exewerfault.exe /h /shared Global\1d1f63a683b9410f8223060b0f9b0420 /t 4320 /p 26401⤵
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\3875.tmp\3876.tmp\3877.vbsFilesize
352B
MD53b8696ecbb737aad2a763c4eaf62c247
SHA14a2d7a2d61d3f4c414b4e5d2933cd404b8f126e5
SHA256ce95f7eea8b303bc23cfd6e41748ad4e7b5e0f0f1d3bdf390eadb1e354915569
SHA512713d9697b892b9dd892537e8a01eab8d0265ebf64867c8beecf7a744321257c2a5c11d4de18fcb486bb69f199422ce3cab8b6afdbe880481c47b06ba8f335beb
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C:\Users\Admin\AppData\Local\Temp\3875.tmp\eulascr.exeFilesize
143KB
MD58b1c352450e480d9320fce5e6f2c8713
SHA1d6bd88bf33de7c5d4e68b233c37cc1540c97bd3a
SHA2562c343174231b55e463ca044d19d47bd5842793c15954583eb340bfd95628516e
SHA5122d8e43b1021da08ed1bf5aff110159e6bc10478102c024371302ccfce595e77fd76794658617b5b52f9a50190db250c1ba486d247d9cd69e4732a768edbb4cbc
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C:\Users\Admin\AppData\Local\Temp\5a530dfd-bc51-4992-a05d-f09d41a331d4\AgileDotNetRT64.dllFilesize
75KB
MD542b2c266e49a3acd346b91e3b0e638c0
SHA12bc52134f03fcc51cb4e0f6c7cf70646b4df7dd1
SHA256adeed015f06efa363d504a18acb671b1db4b20b23664a55c9bc28aef3283ca29
SHA512770822fd681a1d98afe03f6fbe5f116321b54c8e2989fb07491811fd29fca5b666f1adf4c6900823af1271e342cacc9293e9db307c4eef852d1a253b00347a81
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memory/2640-17-0x00000000025E0000-0x00000000025F0000-memory.dmpFilesize
64KB
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memory/2640-15-0x00007FF94E080000-0x00007FF94E1CE000-memory.dmpFilesize
1.3MB
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memory/2640-16-0x00007FF93E8D0000-0x00007FF93F391000-memory.dmpFilesize
10.8MB
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memory/2640-8-0x00000000003A0000-0x00000000003CA000-memory.dmpFilesize
168KB
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memory/2640-18-0x000000001D1A0000-0x000000001D362000-memory.dmpFilesize
1.8MB
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memory/2640-19-0x000000001D8A0000-0x000000001DDC8000-memory.dmpFilesize
5.2MB
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memory/2640-20-0x00000000025E0000-0x00000000025F0000-memory.dmpFilesize
64KB
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memory/2640-21-0x00007FF93E8D0000-0x00007FF93F391000-memory.dmpFilesize
10.8MB
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memory/2640-22-0x00000000025E0000-0x00000000025F0000-memory.dmpFilesize
64KB
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memory/2640-23-0x00000000025E0000-0x00000000025F0000-memory.dmpFilesize
64KB
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memory/2640-24-0x00000000025E0000-0x00000000025F0000-memory.dmpFilesize
64KB
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memory/2640-26-0x00007FF93E8D0000-0x00007FF93F391000-memory.dmpFilesize
10.8MB