Analysis
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max time kernel
111s -
max time network
106s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
31/10/2024, 04:29
Behavioral task
behavioral1
Sample
f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe
Resource
win10v2004-20241007-en
General
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Target
f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe
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Size
15KB
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MD5
f662c9c1cdf777db6a73dd0c2eef4b40
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SHA1
61bad3b005cc136d514cd3ec5ae86428142bc1ad
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SHA256
f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58
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SHA512
d1d9e0b046f04a0c8cb02e3402866440a3373c9bdc431fdde01dfd552735a9dbbac96dcc16af0e4d9a2d07a4a78f29526e5fc25a4e03c74be808dc3a6b4bb944
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SSDEEP
384:IO3qdXlIQV0YXd45xuYiMcRWnPbeVGWLwbbb9:IO3EVdV0YXd4DuicNV3C
Malware Config
Signatures
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Sets file to hidden 1 TTPs 1 IoCs
Modifies file attributes to stop it showing in Explorer etc.
pid Process 2372 attrib.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe -
Executes dropped EXE 1 IoCs
pid Process 4760 mewhost.exe -
Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
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resource yara_rule behavioral2/memory/3428-0-0x0000000000400000-0x0000000000414000-memory.dmp upx behavioral2/files/0x000a000000023c5b-3.dat upx behavioral2/memory/3428-5-0x0000000000400000-0x0000000000414000-memory.dmp upx behavioral2/memory/4760-6-0x0000000000400000-0x0000000000414000-memory.dmp upx behavioral2/memory/4760-9-0x0000000000400000-0x0000000000414000-memory.dmp upx behavioral2/memory/4760-12-0x0000000000400000-0x0000000000414000-memory.dmp upx behavioral2/memory/4760-15-0x0000000000400000-0x0000000000414000-memory.dmp upx -
Drops file in Windows directory 3 IoCs
description ioc Process File created C:\Windows\Debug\mewhost.exe f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe File opened for modification C:\Windows\Debug\mewhost.exe f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe File opened for modification C:\Windows\Debug\mewhost.exe attrib.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 4 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language mewhost.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language attrib.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeIncBasePriorityPrivilege 3428 f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 3428 wrote to memory of 2372 3428 f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe 86 PID 3428 wrote to memory of 2372 3428 f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe 86 PID 3428 wrote to memory of 2372 3428 f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe 86 PID 3428 wrote to memory of 2780 3428 f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe 90 PID 3428 wrote to memory of 2780 3428 f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe 90 PID 3428 wrote to memory of 2780 3428 f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe 90 -
Views/modifies file attributes 1 TTPs 1 IoCs
pid Process 2372 attrib.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe"C:\Users\Admin\AppData\Local\Temp\f9aefb1b37168ea33f607f053bbc7b7d2113ca98260b5be9627cd77cbe560f58N.exe"1⤵
- Checks computer location settings
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3428 -
C:\Windows\SysWOW64\attrib.exeattrib +a +s +h +r C:\Windows\Debug\mewhost.exe2⤵
- Sets file to hidden
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Views/modifies file attributes
PID:2372
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\F9AEFB~1.EXE > nul2⤵
- System Location Discovery: System Language Discovery
PID:2780
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C:\Windows\Debug\mewhost.exeC:\Windows\Debug\mewhost.exe1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:4760
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
15KB
MD5fbfbeeae81c4dc2c2ef89aa2421da792
SHA19face13a81941a1f5129db9c710e26bfc3cfddff
SHA256b714a337fcaa499133f82b0dcb1a2767caf5e739f0bdff04dc73d6cfe556265b
SHA512f765a86efd42669e794157c1ded6658fa1f27c5e9220b22b883bffd01ecd1939a720d7244f6ff9ef6b2cc2b139348a8738ff7d7f4b56dc40e3260288a8bfe096