Analysis
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max time kernel
94s -
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
29/12/2022, 00:54
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
acf295d1b9237aa575913e779e91be03
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SHA1
8e6d3e8fd488f4694d3b7427aa59aca0fb0dbc29
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SHA256
929cc3fad89061f918ed1eef3efa1d61679223b0e1af0514ebff9fd6c713bc99
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SHA512
25e803af0728afb431b497e57fc579c7d6f8e7fa5e695eccc1d794d49f325dd28cbcbe69817e27f989798dac7508bee520a21331ab21089d5a249f9a59ecc662
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SSDEEP
49152:Ui5rvOin8vnNoiPgYLmeabrbVQtcmHhFMmT9Kc2Nz:Ui5qiWozYLerbVxkhFC
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 1072 is-7CN25.tmp 4756 SplitFiles123.exe 972 E0Eed6piSGpN.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-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation SplitFiles123.exe -
Loads dropped DLL 1 IoCs
pid Process 1072 is-7CN25.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-M1D5B.tmp is-7CN25.tmp File created C:\Program Files (x86)\Split Files\language\is-QDERN.tmp is-7CN25.tmp File created C:\Program Files (x86)\Split Files\is-65KCR.tmp is-7CN25.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles123.exe is-7CN25.tmp File created C:\Program Files (x86)\Split Files\language\is-UACIA.tmp is-7CN25.tmp File created C:\Program Files (x86)\Split Files\language\is-309TE.tmp is-7CN25.tmp File created C:\Program Files (x86)\Split Files\language\is-JNQGI.tmp is-7CN25.tmp File created C:\Program Files (x86)\Split Files\language\is-40NU6.tmp is-7CN25.tmp File created C:\Program Files (x86)\Split Files\language\is-US1VP.tmp is-7CN25.tmp File created C:\Program Files (x86)\Split Files\language\is-25CH9.tmp is-7CN25.tmp File created C:\Program Files (x86)\Split Files\is-FQVR3.tmp is-7CN25.tmp File created C:\Program Files (x86)\Split Files\is-R417B.tmp is-7CN25.tmp File created C:\Program Files (x86)\Split Files\unins000.dat is-7CN25.tmp File created C:\Program Files (x86)\Split Files\is-B7N3N.tmp is-7CN25.tmp File created C:\Program Files (x86)\Split Files\language\is-F51TH.tmp is-7CN25.tmp File created C:\Program Files (x86)\Split Files\is-BCLHQ.tmp is-7CN25.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-7CN25.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 4856 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 4756 SplitFiles123.exe 4756 SplitFiles123.exe 4756 SplitFiles123.exe 4756 SplitFiles123.exe 4756 SplitFiles123.exe 4756 SplitFiles123.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 4856 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 4928 wrote to memory of 1072 4928 file.exe 82 PID 4928 wrote to memory of 1072 4928 file.exe 82 PID 4928 wrote to memory of 1072 4928 file.exe 82 PID 1072 wrote to memory of 4756 1072 is-7CN25.tmp 83 PID 1072 wrote to memory of 4756 1072 is-7CN25.tmp 83 PID 1072 wrote to memory of 4756 1072 is-7CN25.tmp 83 PID 4756 wrote to memory of 972 4756 SplitFiles123.exe 87 PID 4756 wrote to memory of 972 4756 SplitFiles123.exe 87 PID 4756 wrote to memory of 972 4756 SplitFiles123.exe 87 PID 4756 wrote to memory of 4000 4756 SplitFiles123.exe 92 PID 4756 wrote to memory of 4000 4756 SplitFiles123.exe 92 PID 4756 wrote to memory of 4000 4756 SplitFiles123.exe 92 PID 4000 wrote to memory of 4856 4000 cmd.exe 94 PID 4000 wrote to memory of 4856 4000 cmd.exe 94 PID 4000 wrote to memory of 4856 4000 cmd.exe 94
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:4928 -
C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp"C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp" /SL4 $80060 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1537937 967682⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:1072 -
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:4756 -
C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\E0Eed6piSGpN.exe4⤵
- Executes dropped EXE
PID:972
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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:4000 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles123.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4856
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.1MB
MD52c4eb645fa6e9d780e5877cee6184b41
SHA1664bfcb927a9d7e2c51d5ab0f46f8e4a584a2a53
SHA25678130bbde3d251ee73c93293f201e98c6adf097c60b6666b980223b06f85d7e0
SHA5125377230c82db99d260c04466166c4aabe8c8d81c324c738d11e574b3461f1e1b37e4258d136a9b1ceac7de0b5abbff79019fbc77f67241f181b3934e34c43072
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Filesize
3.1MB
MD52c4eb645fa6e9d780e5877cee6184b41
SHA1664bfcb927a9d7e2c51d5ab0f46f8e4a584a2a53
SHA25678130bbde3d251ee73c93293f201e98c6adf097c60b6666b980223b06f85d7e0
SHA5125377230c82db99d260c04466166c4aabe8c8d81c324c738d11e574b3461f1e1b37e4258d136a9b1ceac7de0b5abbff79019fbc77f67241f181b3934e34c43072
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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
2KB
MD5a69559718ab506675e907fe49deb71e9
SHA1bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA2562f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c