Analysis
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max time kernel
231s -
max time network
337s -
platform
windows7_x64 -
resource
win7-20221111-en -
resource tags
arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system -
submitted
24-11-2022 22:09
Static task
static1
Behavioral task
behavioral1
Sample
92eca52aaecf0081ff4b9291632b0dc438c301af47ea30d54e8d91d25a7ad8a2.exe
Resource
win7-20221111-en
Behavioral task
behavioral2
Sample
92eca52aaecf0081ff4b9291632b0dc438c301af47ea30d54e8d91d25a7ad8a2.exe
Resource
win10v2004-20220812-en
General
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Target
92eca52aaecf0081ff4b9291632b0dc438c301af47ea30d54e8d91d25a7ad8a2.exe
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Size
233KB
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MD5
a3e0c2ed8c7c5d4cac4cd8f7f6da8fde
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SHA1
f1d13115a55702fa8a536c042a1872e6c3105b5f
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SHA256
92eca52aaecf0081ff4b9291632b0dc438c301af47ea30d54e8d91d25a7ad8a2
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SHA512
0d7d9fe6f9130b7f26d4ca2553cc319c72dc0463d07e2b085edd376338153721a56f59aa13f77f994a1c898f810c95e2758f94530c7020a022d5acf59d565c73
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SSDEEP
6144:rSgCxWRq4OQek7opB4cEM0oYO76SFycdR:rUU3584G0i6SIcdR
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
steamwebhelper.exepid process 1520 steamwebhelper.exe -
Loads dropped DLL 1 IoCs
Processes:
92eca52aaecf0081ff4b9291632b0dc438c301af47ea30d54e8d91d25a7ad8a2.exepid process 768 92eca52aaecf0081ff4b9291632b0dc438c301af47ea30d54e8d91d25a7ad8a2.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
92eca52aaecf0081ff4b9291632b0dc438c301af47ea30d54e8d91d25a7ad8a2.exesteamwebhelper.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\steamwebhelper = "C:\\Users\\Admin\\AppData\\Roaming\\steamwebhelper2\\steamwebhelper.exe" 92eca52aaecf0081ff4b9291632b0dc438c301af47ea30d54e8d91d25a7ad8a2.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\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:
92eca52aaecf0081ff4b9291632b0dc438c301af47ea30d54e8d91d25a7ad8a2.exesteamwebhelper.exepid process 768 92eca52aaecf0081ff4b9291632b0dc438c301af47ea30d54e8d91d25a7ad8a2.exe 1520 steamwebhelper.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
92eca52aaecf0081ff4b9291632b0dc438c301af47ea30d54e8d91d25a7ad8a2.exesteamwebhelper.exedescription pid process Token: SeDebugPrivilege 768 92eca52aaecf0081ff4b9291632b0dc438c301af47ea30d54e8d91d25a7ad8a2.exe Token: SeDebugPrivilege 1520 steamwebhelper.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
92eca52aaecf0081ff4b9291632b0dc438c301af47ea30d54e8d91d25a7ad8a2.exedescription pid process target process PID 768 wrote to memory of 1520 768 92eca52aaecf0081ff4b9291632b0dc438c301af47ea30d54e8d91d25a7ad8a2.exe steamwebhelper.exe PID 768 wrote to memory of 1520 768 92eca52aaecf0081ff4b9291632b0dc438c301af47ea30d54e8d91d25a7ad8a2.exe steamwebhelper.exe PID 768 wrote to memory of 1520 768 92eca52aaecf0081ff4b9291632b0dc438c301af47ea30d54e8d91d25a7ad8a2.exe steamwebhelper.exe PID 768 wrote to memory of 1520 768 92eca52aaecf0081ff4b9291632b0dc438c301af47ea30d54e8d91d25a7ad8a2.exe steamwebhelper.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\92eca52aaecf0081ff4b9291632b0dc438c301af47ea30d54e8d91d25a7ad8a2.exe"C:\Users\Admin\AppData\Local\Temp\92eca52aaecf0081ff4b9291632b0dc438c301af47ea30d54e8d91d25a7ad8a2.exe"1⤵
- Loads dropped DLL
- 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
233KB
MD5a3e0c2ed8c7c5d4cac4cd8f7f6da8fde
SHA1f1d13115a55702fa8a536c042a1872e6c3105b5f
SHA25692eca52aaecf0081ff4b9291632b0dc438c301af47ea30d54e8d91d25a7ad8a2
SHA5120d7d9fe6f9130b7f26d4ca2553cc319c72dc0463d07e2b085edd376338153721a56f59aa13f77f994a1c898f810c95e2758f94530c7020a022d5acf59d565c73
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C:\Users\Admin\AppData\Roaming\steamwebhelper2\steamwebhelper.exeFilesize
233KB
MD5a3e0c2ed8c7c5d4cac4cd8f7f6da8fde
SHA1f1d13115a55702fa8a536c042a1872e6c3105b5f
SHA25692eca52aaecf0081ff4b9291632b0dc438c301af47ea30d54e8d91d25a7ad8a2
SHA5120d7d9fe6f9130b7f26d4ca2553cc319c72dc0463d07e2b085edd376338153721a56f59aa13f77f994a1c898f810c95e2758f94530c7020a022d5acf59d565c73
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\Users\Admin\AppData\Roaming\steamwebhelper2\steamwebhelper.exeFilesize
233KB
MD5a3e0c2ed8c7c5d4cac4cd8f7f6da8fde
SHA1f1d13115a55702fa8a536c042a1872e6c3105b5f
SHA25692eca52aaecf0081ff4b9291632b0dc438c301af47ea30d54e8d91d25a7ad8a2
SHA5120d7d9fe6f9130b7f26d4ca2553cc319c72dc0463d07e2b085edd376338153721a56f59aa13f77f994a1c898f810c95e2758f94530c7020a022d5acf59d565c73
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memory/768-54-0x0000000000DB0000-0x0000000000DF0000-memory.dmpFilesize
256KB
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memory/768-55-0x0000000000440000-0x0000000000478000-memory.dmpFilesize
224KB
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memory/768-56-0x0000000000320000-0x0000000000326000-memory.dmpFilesize
24KB
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memory/768-57-0x0000000075D51000-0x0000000075D53000-memory.dmpFilesize
8KB
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memory/1520-59-0x0000000000000000-mapping.dmp
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memory/1520-62-0x00000000002A0000-0x00000000002E0000-memory.dmpFilesize
256KB