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Analysis
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max time kernel
111s -
max time network
96s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
20/09/2024, 23:53
Static task
static1
Behavioral task
behavioral1
Sample
23b641e5eecec19208e2c8d9d0a7871a2fdb2ef285c639af1c172468ad4a31b5N.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
23b641e5eecec19208e2c8d9d0a7871a2fdb2ef285c639af1c172468ad4a31b5N.exe
Resource
win10v2004-20240802-en
General
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Target
23b641e5eecec19208e2c8d9d0a7871a2fdb2ef285c639af1c172468ad4a31b5N.exe
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Size
84KB
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MD5
09b4f0afd517a3d0def55563be233e90
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SHA1
40f1ca57a69abb9d149efc87b189bb6ddf87eb8c
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SHA256
23b641e5eecec19208e2c8d9d0a7871a2fdb2ef285c639af1c172468ad4a31b5
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SHA512
85b4f954d9d08ffb7ffc493e5bc8a7e94390c180883e4068455552caa1e2a34997912391ebc502c31da18e618fce3fb54bdd6c13bc7b41915330a5e265211988
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SSDEEP
1536:bDcWLfIbgEp10gyXVdtnTHNWnnn622222K:bDXL0n0gyXVd1re2222K
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 472 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-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation 23b641e5eecec19208e2c8d9d0a7871a2fdb2ef285c639af1c172468ad4a31b5N.exe -
Executes dropped EXE 1 IoCs
pid Process 416 wmahost.exe -
Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
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Drops file in Windows directory 3 IoCs
description ioc Process File created C:\Windows\Debug\wmahost.exe 23b641e5eecec19208e2c8d9d0a7871a2fdb2ef285c639af1c172468ad4a31b5N.exe File opened for modification C:\Windows\Debug\wmahost.exe 23b641e5eecec19208e2c8d9d0a7871a2fdb2ef285c639af1c172468ad4a31b5N.exe File opened for modification C:\Windows\Debug\wmahost.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 23b641e5eecec19208e2c8d9d0a7871a2fdb2ef285c639af1c172468ad4a31b5N.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language wmahost.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language attrib.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 wmahost.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz wmahost.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeIncBasePriorityPrivilege 3152 23b641e5eecec19208e2c8d9d0a7871a2fdb2ef285c639af1c172468ad4a31b5N.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 3152 wrote to memory of 472 3152 23b641e5eecec19208e2c8d9d0a7871a2fdb2ef285c639af1c172468ad4a31b5N.exe 82 PID 3152 wrote to memory of 472 3152 23b641e5eecec19208e2c8d9d0a7871a2fdb2ef285c639af1c172468ad4a31b5N.exe 82 PID 3152 wrote to memory of 472 3152 23b641e5eecec19208e2c8d9d0a7871a2fdb2ef285c639af1c172468ad4a31b5N.exe 82 PID 3152 wrote to memory of 3620 3152 23b641e5eecec19208e2c8d9d0a7871a2fdb2ef285c639af1c172468ad4a31b5N.exe 85 PID 3152 wrote to memory of 3620 3152 23b641e5eecec19208e2c8d9d0a7871a2fdb2ef285c639af1c172468ad4a31b5N.exe 85 PID 3152 wrote to memory of 3620 3152 23b641e5eecec19208e2c8d9d0a7871a2fdb2ef285c639af1c172468ad4a31b5N.exe 85 -
Views/modifies file attributes 1 TTPs 1 IoCs
pid Process 472 attrib.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\23b641e5eecec19208e2c8d9d0a7871a2fdb2ef285c639af1c172468ad4a31b5N.exe"C:\Users\Admin\AppData\Local\Temp\23b641e5eecec19208e2c8d9d0a7871a2fdb2ef285c639af1c172468ad4a31b5N.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:3152 -
C:\Windows\SysWOW64\attrib.exeattrib +a +s +h +r C:\Windows\Debug\wmahost.exe2⤵
- Sets file to hidden
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Views/modifies file attributes
PID:472
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\23B641~1.EXE > nul2⤵
- System Location Discovery: System Language Discovery
PID:3620
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C:\Windows\Debug\wmahost.exeC:\Windows\Debug\wmahost.exe1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Checks processor information in registry
PID:416
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
84KB
MD5a4a3c314a468e2c14605ba45af966f36
SHA1f18ba359a52c74267181fd4077865c5d5a88d8cc
SHA256e57fc10220b8ec288f9a9014be2e77830f587f70df55f781a8e9273fb05ba019
SHA512533b0271f98915787e73c5ebe75403688cb6b1ad2a82a0dfa25922cd0cec0c69652f500d02ee40d93036146fb1f575efd061b27e9766d4c817397610448227cd