Analysis
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max time kernel
91s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system -
submitted
23/12/2022, 03:47
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
1.8MB
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MD5
1f5d571afe1850dfb90a35a83fd8b8f1
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SHA1
3b05381ab3144063f0eef206e44449ffd70abee7
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SHA256
b0fdf2f061e4455ede7e8b5f55186d1b85fc00957e30f35c07e4642e6620a869
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SHA512
dc0702c5c91a496dab080db2862833354fef794456bcda51c66c2e8be3104d1b8da3590a6f4c19df9c69fad35150075c50e3bfd04800b42fd237349d99b663f4
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SSDEEP
49152:P3zVoWqx6sqyKdQByZZpXOAsLm850+qBWP7p3d:PJux+yKdYapeAsm8a3Gdd
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 2136 is-AEMFI.tmp 740 SplitFiles118.exe 1924 gPvnT4UAcfOTj9.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 SplitFiles118.exe -
Loads dropped DLL 1 IoCs
pid Process 2136 is-AEMFI.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\unins000.dat is-AEMFI.tmp File created C:\Program Files (x86)\Split Files\language\is-I9R1E.tmp is-AEMFI.tmp File created C:\Program Files (x86)\Split Files\language\is-HAA26.tmp is-AEMFI.tmp File created C:\Program Files (x86)\Split Files\language\is-GV9JC.tmp is-AEMFI.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-AEMFI.tmp File created C:\Program Files (x86)\Split Files\is-N8D19.tmp is-AEMFI.tmp File created C:\Program Files (x86)\Split Files\language\is-VMHMR.tmp is-AEMFI.tmp File created C:\Program Files (x86)\Split Files\is-K661E.tmp is-AEMFI.tmp File created C:\Program Files (x86)\Split Files\is-UI8QH.tmp is-AEMFI.tmp File created C:\Program Files (x86)\Split Files\language\is-K8D1U.tmp is-AEMFI.tmp File created C:\Program Files (x86)\Split Files\language\is-B0466.tmp is-AEMFI.tmp File created C:\Program Files (x86)\Split Files\language\is-7F83B.tmp is-AEMFI.tmp File created C:\Program Files (x86)\Split Files\is-D958D.tmp is-AEMFI.tmp File created C:\Program Files (x86)\Split Files\language\is-N01UC.tmp is-AEMFI.tmp File created C:\Program Files (x86)\Split Files\language\is-Q6HO3.tmp is-AEMFI.tmp File created C:\Program Files (x86)\Split Files\is-Q0D4Q.tmp is-AEMFI.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles118.exe is-AEMFI.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 4340 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 740 SplitFiles118.exe 740 SplitFiles118.exe 740 SplitFiles118.exe 740 SplitFiles118.exe 740 SplitFiles118.exe 740 SplitFiles118.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 4340 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 5056 wrote to memory of 2136 5056 file.exe 80 PID 5056 wrote to memory of 2136 5056 file.exe 80 PID 5056 wrote to memory of 2136 5056 file.exe 80 PID 2136 wrote to memory of 740 2136 is-AEMFI.tmp 81 PID 2136 wrote to memory of 740 2136 is-AEMFI.tmp 81 PID 2136 wrote to memory of 740 2136 is-AEMFI.tmp 81 PID 740 wrote to memory of 1924 740 SplitFiles118.exe 84 PID 740 wrote to memory of 1924 740 SplitFiles118.exe 84 PID 740 wrote to memory of 1924 740 SplitFiles118.exe 84 PID 740 wrote to memory of 1836 740 SplitFiles118.exe 90 PID 740 wrote to memory of 1836 740 SplitFiles118.exe 90 PID 740 wrote to memory of 1836 740 SplitFiles118.exe 90 PID 1836 wrote to memory of 4340 1836 cmd.exe 92 PID 1836 wrote to memory of 4340 1836 cmd.exe 92 PID 1836 wrote to memory of 4340 1836 cmd.exe 92
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:5056 -
C:\Users\Admin\AppData\Local\Temp\is-N0F7C.tmp\is-AEMFI.tmp"C:\Users\Admin\AppData\Local\Temp\is-N0F7C.tmp\is-AEMFI.tmp" /SL4 $701B0 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1620072 1331202⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:2136 -
C:\Program Files (x86)\Split Files\SplitFiles118.exe"C:\Program Files (x86)\Split Files\SplitFiles118.exe"3⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:740 -
C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\gPvnT4UAcfOTj9.exe4⤵
- Executes dropped EXE
PID:1924
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles118.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles118.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
PID:1836 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles118.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4340
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.1MB
MD559eb5ca8f23e73897da5379802871d40
SHA1b83cb2d7dd2eb57eb9decc549494b1b40b269470
SHA2565a0b0960fd4607cdd7ea06392b6e2e0adf7d2bdebfc5ec6530759dc446c25eec
SHA5121149452e79282722b86fccea4207e1a18066a08e5dc1cf3aebb8ec1c5a0e03f75ee33c2e4eeefddff0b5ba8e811be414c8b76e994e8414be1aa69e412de028e4
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Filesize
3.1MB
MD559eb5ca8f23e73897da5379802871d40
SHA1b83cb2d7dd2eb57eb9decc549494b1b40b269470
SHA2565a0b0960fd4607cdd7ea06392b6e2e0adf7d2bdebfc5ec6530759dc446c25eec
SHA5121149452e79282722b86fccea4207e1a18066a08e5dc1cf3aebb8ec1c5a0e03f75ee33c2e4eeefddff0b5ba8e811be414c8b76e994e8414be1aa69e412de028e4
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Filesize
2KB
MD5a69559718ab506675e907fe49deb71e9
SHA1bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA2562f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
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Filesize
723KB
MD5703b4da86c2d38881230d26bc1051cb2
SHA113b9e7582e94cb6e4f703bc08a28c53cdc003019
SHA25690b8f255f68be9f092608be15074b6fc3c4be724ae82dae5adb390307b121c89
SHA512e3d80bc78b41e24450effe46f713e9bf7fcd376141a3c6b3f20e3ec81c9c3ab85d300104b2dbbef9512f92a2b613dbc326899e442dc669490c1e192f79a7363b
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Filesize
723KB
MD5703b4da86c2d38881230d26bc1051cb2
SHA113b9e7582e94cb6e4f703bc08a28c53cdc003019
SHA25690b8f255f68be9f092608be15074b6fc3c4be724ae82dae5adb390307b121c89
SHA512e3d80bc78b41e24450effe46f713e9bf7fcd376141a3c6b3f20e3ec81c9c3ab85d300104b2dbbef9512f92a2b613dbc326899e442dc669490c1e192f79a7363b
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c