Analysis
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max time kernel
107s -
max time network
123s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system -
submitted
28/12/2022, 23:41
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20221111-en
General
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Target
file.exe
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Size
1.7MB
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MD5
686e01fe8868b40ea6a2245faa03c93a
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SHA1
e3a4044ea1cddf9bb39b7f951b9321468d04c22f
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SHA256
927cfa4f6978fb891d278511a3b94a9f4d09780e8da6ae3b792c8d7161c34830
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SHA512
5fb7737e09dc3c639e7b0d23dad5ce807d8e868ce7b071e5d2bcae9584e84376a34a345c70d615cbfcdabe242e37acd9bcb6901599c307b4b87fc79d526415d2
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SSDEEP
24576:Opni5chPp5Z+gUKA70gb8smCuBqS+3lwPslWWdcE3ngBWg7FygmuNzC00+DRf0DU:0iu5QgnA70u8DVJEQT/NmtgOrNK
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 2124 is-OS7DC.tmp 3432 SplitFiles123.exe 1264 ddLFo02XahX59.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-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation SplitFiles123.exe -
Loads dropped DLL 1 IoCs
pid Process 2124 is-OS7DC.tmp -
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Drops file in Program Files directory 17 IoCs
description ioc Process File created C:\Program Files (x86)\Split Files\language\is-2P48T.tmp is-OS7DC.tmp File created C:\Program Files (x86)\Split Files\is-GU7GG.tmp is-OS7DC.tmp File created C:\Program Files (x86)\Split Files\is-QHER4.tmp is-OS7DC.tmp File created C:\Program Files (x86)\Split Files\language\is-CJ7K3.tmp is-OS7DC.tmp File created C:\Program Files (x86)\Split Files\language\is-1PUTL.tmp is-OS7DC.tmp File created C:\Program Files (x86)\Split Files\is-A9I7S.tmp is-OS7DC.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles123.exe is-OS7DC.tmp File created C:\Program Files (x86)\Split Files\is-B4KUO.tmp is-OS7DC.tmp File created C:\Program Files (x86)\Split Files\language\is-V6Q4C.tmp is-OS7DC.tmp File created C:\Program Files (x86)\Split Files\language\is-PHGS4.tmp is-OS7DC.tmp File created C:\Program Files (x86)\Split Files\language\is-V7KGG.tmp is-OS7DC.tmp File created C:\Program Files (x86)\Split Files\unins000.dat is-OS7DC.tmp File created C:\Program Files (x86)\Split Files\is-2B7CG.tmp is-OS7DC.tmp File created C:\Program Files (x86)\Split Files\language\is-J1QI6.tmp is-OS7DC.tmp File created C:\Program Files (x86)\Split Files\language\is-2N77S.tmp is-OS7DC.tmp File created C:\Program Files (x86)\Split Files\language\is-C2U55.tmp is-OS7DC.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-OS7DC.tmp -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Kills process with taskkill 1 IoCs
pid Process 4048 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 3432 SplitFiles123.exe 3432 SplitFiles123.exe 3432 SplitFiles123.exe 3432 SplitFiles123.exe 3432 SplitFiles123.exe 3432 SplitFiles123.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 4048 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 792 wrote to memory of 2124 792 file.exe 84 PID 792 wrote to memory of 2124 792 file.exe 84 PID 792 wrote to memory of 2124 792 file.exe 84 PID 2124 wrote to memory of 3432 2124 is-OS7DC.tmp 85 PID 2124 wrote to memory of 3432 2124 is-OS7DC.tmp 85 PID 2124 wrote to memory of 3432 2124 is-OS7DC.tmp 85 PID 3432 wrote to memory of 1264 3432 SplitFiles123.exe 89 PID 3432 wrote to memory of 1264 3432 SplitFiles123.exe 89 PID 3432 wrote to memory of 1264 3432 SplitFiles123.exe 89 PID 3432 wrote to memory of 4648 3432 SplitFiles123.exe 94 PID 3432 wrote to memory of 4648 3432 SplitFiles123.exe 94 PID 3432 wrote to memory of 4648 3432 SplitFiles123.exe 94 PID 4648 wrote to memory of 4048 4648 cmd.exe 96 PID 4648 wrote to memory of 4048 4648 cmd.exe 96 PID 4648 wrote to memory of 4048 4648 cmd.exe 96
Processes
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:792 -
C:\Users\Admin\AppData\Local\Temp\is-QEG5M.tmp\is-OS7DC.tmp"C:\Users\Admin\AppData\Local\Temp\is-QEG5M.tmp\is-OS7DC.tmp" /SL4 $E0048 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1581777 967682⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:2124 -
C:\Program Files (x86)\Split Files\SplitFiles123.exe"C:\Program Files (x86)\Split Files\SplitFiles123.exe"3⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3432 -
C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\ddLFo02XahX59.exe4⤵
- Executes dropped EXE
PID:1264
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles123.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles123.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
PID:4648 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles123.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4048
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.1MB
MD549a2490ada3f4c95e30b50bcb3c830d9
SHA102313717ecf2415bac4bd1248e89167bca366217
SHA256c6b0975f6cebab1366d43cc4e7fe8e92735ba092bc2a0fbd6c444273188acbda
SHA5128c47935320539ce52c1e9d652adbda6d3ad4a82c8cabfe9ba851284bf41e12f24ab6da3525a47a494b649007e784662d16fa943e79d594287881fdfd1e7b203e
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Filesize
3.1MB
MD549a2490ada3f4c95e30b50bcb3c830d9
SHA102313717ecf2415bac4bd1248e89167bca366217
SHA256c6b0975f6cebab1366d43cc4e7fe8e92735ba092bc2a0fbd6c444273188acbda
SHA5128c47935320539ce52c1e9d652adbda6d3ad4a82c8cabfe9ba851284bf41e12f24ab6da3525a47a494b649007e784662d16fa943e79d594287881fdfd1e7b203e
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Filesize
2KB
MD5a69559718ab506675e907fe49deb71e9
SHA1bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA2562f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
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Filesize
688KB
MD5807603f3a565337ee2ac3e819b25ee58
SHA15cc4e6c82fbdda6697a1117561f23731d51baacd
SHA256682dd0a4ea6b0d763a1adb14def8657518a4879e454c7ece43505910dd448423
SHA512252831b5fe5869c0abd25f246fe161e5b8218e9c54231fa9c5c78d5ffe6ff0c8e3d1f9ea3316f74b47ce372f1f8f06edd8e147711633f4028acd0cf7d5cd946d
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Filesize
688KB
MD5807603f3a565337ee2ac3e819b25ee58
SHA15cc4e6c82fbdda6697a1117561f23731d51baacd
SHA256682dd0a4ea6b0d763a1adb14def8657518a4879e454c7ece43505910dd448423
SHA512252831b5fe5869c0abd25f246fe161e5b8218e9c54231fa9c5c78d5ffe6ff0c8e3d1f9ea3316f74b47ce372f1f8f06edd8e147711633f4028acd0cf7d5cd946d
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c