Analysis
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max time kernel
122s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
25-11-2022 01:42
Static task
static1
Behavioral task
behavioral1
Sample
4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exe
Resource
win7-20221111-en
Behavioral task
behavioral2
Sample
4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exe
Resource
win10v2004-20220901-en
General
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Target
4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exe
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Size
492KB
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MD5
d4996ead0844d2d4cd214d32518bbb97
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SHA1
892132e499f0b8c06a4bc7db6beb00e7e0bf5c50
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SHA256
4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d
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SHA512
72b457ed4b5e3d12d0aa54b9864a630b338f1b154e23a9559c1731ac0ea195ff5802de693742731bb5dc1df12aaa761bb3320531af033549d61f449e048a2e7d
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SSDEEP
6144:QcABECAClP2k2BkehhmsVyh/bTzng0m8rPK8jER0u+GIIIIIIIhIIIIIIIIIIIIM:QyCA+P2ktaNVQ/bTrgaNAm5s
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
steamwebhelper.exepid process 3508 steamwebhelper.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation 4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exesteamwebhelper.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\steamwebhelper = "C:\\Users\\Admin\\AppData\\Roaming\\steamwebhelper2\\steamwebhelper.exe" 4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\steamwebhelper = "C:\\Users\\Admin\\AppData\\Roaming\\steamwebhelper2\\steamwebhelper.exe" steamwebhelper.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exesteamwebhelper.exepid process 3068 4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exe 3508 steamwebhelper.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exesteamwebhelper.exedescription pid process Token: SeDebugPrivilege 3068 4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exe Token: SeDebugPrivilege 3508 steamwebhelper.exe -
Suspicious use of WriteProcessMemory 2 IoCs
Processes:
4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exedescription pid process target process PID 3068 wrote to memory of 3508 3068 4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exe steamwebhelper.exe PID 3068 wrote to memory of 3508 3068 4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exe steamwebhelper.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exe"C:\Users\Admin\AppData\Local\Temp\4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exe"1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\steamwebhelper2\steamwebhelper.exe"C:\Users\Admin\AppData\Roaming\steamwebhelper2\steamwebhelper.exe"2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Roaming\steamwebhelper2\steamwebhelper.exeFilesize
492KB
MD5d4996ead0844d2d4cd214d32518bbb97
SHA1892132e499f0b8c06a4bc7db6beb00e7e0bf5c50
SHA2564ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d
SHA51272b457ed4b5e3d12d0aa54b9864a630b338f1b154e23a9559c1731ac0ea195ff5802de693742731bb5dc1df12aaa761bb3320531af033549d61f449e048a2e7d
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C:\Users\Admin\AppData\Roaming\steamwebhelper2\steamwebhelper.exeFilesize
492KB
MD5d4996ead0844d2d4cd214d32518bbb97
SHA1892132e499f0b8c06a4bc7db6beb00e7e0bf5c50
SHA2564ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d
SHA51272b457ed4b5e3d12d0aa54b9864a630b338f1b154e23a9559c1731ac0ea195ff5802de693742731bb5dc1df12aaa761bb3320531af033549d61f449e048a2e7d
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memory/3068-132-0x0000000000D40000-0x0000000000DC0000-memory.dmpFilesize
512KB
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memory/3068-133-0x00007FF9C7460000-0x00007FF9C7F21000-memory.dmpFilesize
10.8MB
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memory/3068-138-0x00007FF9C7460000-0x00007FF9C7F21000-memory.dmpFilesize
10.8MB
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memory/3508-134-0x0000000000000000-mapping.dmp
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memory/3508-137-0x00007FF9C7460000-0x00007FF9C7F21000-memory.dmpFilesize
10.8MB
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memory/3508-139-0x00007FF9C7460000-0x00007FF9C7F21000-memory.dmpFilesize
10.8MB