Analysis
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max time kernel
147s -
max time network
146s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system -
submitted
28-04-2024 05:07
Behavioral task
behavioral1
Sample
tmp.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
tmp.exe
Resource
win10v2004-20240419-en
General
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Target
tmp.exe
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Size
75KB
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MD5
4c2a997fa2661fbfe14db1233b16364c
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SHA1
e48025dbd61de286e13b25b144bf4da5da62761a
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SHA256
c2a299f988158d07a573a21621b00b1577b7c232f91c1442ba30d272e4414c5d
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SHA512
529a26f4769c7be0986e16d8e0bf37632b7b723a3e8d9fa8bb3f9cc4d766bd4d24a802d6aa43fe4df85c23cd680b0188c7e1eaff443a30203b298ba916aa0a57
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SSDEEP
1536:pnqs5zV1jXp4csu1Pzs+AJKZbDjlnOl4KpqC3DOjFt/zN:Bn5nZJ/ZbnsWKpf3DOjHN
Malware Config
Extracted
xworm
3.1
needforrat.hopto.org:7000
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Install_directory
%AppData%
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install_file
USB.exe
Signatures
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Detect Xworm Payload 3 IoCs
Processes:
resource yara_rule behavioral2/memory/3876-0-0x0000000000640000-0x000000000065A000-memory.dmp family_xworm C:\Users\Admin\AppData\Roaming\tmp.exe family_xworm behavioral2/memory/3876-10-0x000000001B2F0000-0x000000001B300000-memory.dmp family_xworm -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
tmp.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation tmp.exe -
Drops startup file 2 IoCs
Processes:
tmp.exedescription ioc process File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\tmp.lnk tmp.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\tmp.lnk tmp.exe -
Executes dropped EXE 2 IoCs
Processes:
tmp.exetmp.exepid process 4344 tmp.exe 820 tmp.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
tmp.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2818691465-3043947619-2475182763-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\tmp = "C:\\Users\\Admin\\AppData\\Roaming\\tmp.exe" tmp.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 1 IoCs
Processes:
tmp.exepid process 3876 tmp.exe -
Suspicious use of AdjustPrivilegeToken 4 IoCs
Processes:
tmp.exetmp.exetmp.exedescription pid process Token: SeDebugPrivilege 3876 tmp.exe Token: SeDebugPrivilege 3876 tmp.exe Token: SeDebugPrivilege 4344 tmp.exe Token: SeDebugPrivilege 820 tmp.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
tmp.exepid process 3876 tmp.exe -
Suspicious use of WriteProcessMemory 2 IoCs
Processes:
tmp.exedescription pid process target process PID 3876 wrote to memory of 1948 3876 tmp.exe schtasks.exe PID 3876 wrote to memory of 1948 3876 tmp.exe schtasks.exe -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\tmp.exe"C:\Users\Admin\AppData\Local\Temp\tmp.exe"1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "tmp" /tr "C:\Users\Admin\AppData\Roaming\tmp.exe"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Roaming\tmp.exeC:\Users\Admin\AppData\Roaming\tmp.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Roaming\tmp.exeC:\Users\Admin\AppData\Roaming\tmp.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\tmp.exe.logFilesize
654B
MD52ff39f6c7249774be85fd60a8f9a245e
SHA1684ff36b31aedc1e587c8496c02722c6698c1c4e
SHA256e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced
SHA5121d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1
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C:\Users\Admin\AppData\Roaming\tmp.exeFilesize
75KB
MD54c2a997fa2661fbfe14db1233b16364c
SHA1e48025dbd61de286e13b25b144bf4da5da62761a
SHA256c2a299f988158d07a573a21621b00b1577b7c232f91c1442ba30d272e4414c5d
SHA512529a26f4769c7be0986e16d8e0bf37632b7b723a3e8d9fa8bb3f9cc4d766bd4d24a802d6aa43fe4df85c23cd680b0188c7e1eaff443a30203b298ba916aa0a57
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memory/3876-0-0x0000000000640000-0x000000000065A000-memory.dmpFilesize
104KB
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memory/3876-1-0x00007FFE30CE0000-0x00007FFE317A1000-memory.dmpFilesize
10.8MB
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memory/3876-10-0x000000001B2F0000-0x000000001B300000-memory.dmpFilesize
64KB
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memory/3876-11-0x00007FFE30CE0000-0x00007FFE317A1000-memory.dmpFilesize
10.8MB
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memory/3876-12-0x000000001B2F0000-0x000000001B300000-memory.dmpFilesize
64KB
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memory/4344-15-0x00007FFE30CE0000-0x00007FFE317A1000-memory.dmpFilesize
10.8MB
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memory/4344-17-0x00007FFE30CE0000-0x00007FFE317A1000-memory.dmpFilesize
10.8MB