Analysis
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max time kernel
72s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
23/12/2022, 08:46
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
1.9MB
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MD5
ee462a073733b708fe893763a74df0ca
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SHA1
7fd26ac78dc92596084a420146a887903f827049
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SHA256
227636537279b4f263ea16cd1fb60b11cd0086769e165bd381bd2603c73c7eea
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SHA512
bfa2227b294a5d5ab43f945b17764ccb422b3d2872cbbaee256b9e6904b8ac741e0eb629277f40b847d2ef5b30859805fd877e262af1efd534dc5a06e2cff625
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SSDEEP
49152:/duFwjaEQRW247LLtWUXK7DVUT4/Fl8z70JbPcSz/pja0WP7p3N:/duKGEQcUNf6AbEshhGdN
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 4236 is-DMTG0.tmp 4224 SplitFiles118.exe 1216 rruxlkk1R.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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation SplitFiles118.exe -
Loads dropped DLL 1 IoCs
pid Process 4236 is-DMTG0.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-ELA17.tmp is-DMTG0.tmp File created C:\Program Files (x86)\Split Files\language\is-4PRT9.tmp is-DMTG0.tmp File created C:\Program Files (x86)\Split Files\language\is-QC20E.tmp is-DMTG0.tmp File created C:\Program Files (x86)\Split Files\is-JAITF.tmp is-DMTG0.tmp File created C:\Program Files (x86)\Split Files\is-T360F.tmp is-DMTG0.tmp File created C:\Program Files (x86)\Split Files\unins000.dat is-DMTG0.tmp File created C:\Program Files (x86)\Split Files\is-8ITF8.tmp is-DMTG0.tmp File created C:\Program Files (x86)\Split Files\is-1KGPO.tmp is-DMTG0.tmp File created C:\Program Files (x86)\Split Files\language\is-ND8EQ.tmp is-DMTG0.tmp File created C:\Program Files (x86)\Split Files\language\is-KAF0Q.tmp is-DMTG0.tmp File created C:\Program Files (x86)\Split Files\language\is-QVQTJ.tmp is-DMTG0.tmp File created C:\Program Files (x86)\Split Files\language\is-THRCF.tmp is-DMTG0.tmp File created C:\Program Files (x86)\Split Files\language\is-ABUU2.tmp is-DMTG0.tmp File created C:\Program Files (x86)\Split Files\is-9CFCR.tmp is-DMTG0.tmp File created C:\Program Files (x86)\Split Files\language\is-VSF5N.tmp is-DMTG0.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-DMTG0.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles118.exe is-DMTG0.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 4952 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 4224 SplitFiles118.exe 4224 SplitFiles118.exe 4224 SplitFiles118.exe 4224 SplitFiles118.exe 4224 SplitFiles118.exe 4224 SplitFiles118.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 4952 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 2368 wrote to memory of 4236 2368 file.exe 80 PID 2368 wrote to memory of 4236 2368 file.exe 80 PID 2368 wrote to memory of 4236 2368 file.exe 80 PID 4236 wrote to memory of 4224 4236 is-DMTG0.tmp 81 PID 4236 wrote to memory of 4224 4236 is-DMTG0.tmp 81 PID 4236 wrote to memory of 4224 4236 is-DMTG0.tmp 81 PID 4224 wrote to memory of 1216 4224 SplitFiles118.exe 82 PID 4224 wrote to memory of 1216 4224 SplitFiles118.exe 82 PID 4224 wrote to memory of 1216 4224 SplitFiles118.exe 82 PID 4224 wrote to memory of 2236 4224 SplitFiles118.exe 90 PID 4224 wrote to memory of 2236 4224 SplitFiles118.exe 90 PID 4224 wrote to memory of 2236 4224 SplitFiles118.exe 90 PID 2236 wrote to memory of 4952 2236 cmd.exe 92 PID 2236 wrote to memory of 4952 2236 cmd.exe 92 PID 2236 wrote to memory of 4952 2236 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:2368 -
C:\Users\Admin\AppData\Local\Temp\is-F1BOD.tmp\is-DMTG0.tmp"C:\Users\Admin\AppData\Local\Temp\is-F1BOD.tmp\is-DMTG0.tmp" /SL4 $701F2 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1788156 1331202⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:4236 -
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:4224 -
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\rruxlkk1R.exe4⤵
- Executes dropped EXE
PID:1216
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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:2236 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles118.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4952
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
3.3MB
MD5a41341f861fb5f7b9782154af3f08bc1
SHA1f353b3531ea73e728fc45372316b4ae4fa1710ee
SHA256a3bbe8d481b68487f0e5522b14232d43b02dd1979ec18892a4f4207796d94e69
SHA5125417c2116e4e0aded40f3402210c85087a4dabe43ba55d888b16ebd80390d0ccb4cb46acbe36935af0428cb1d7351bdbf067081a2c1ccfc749959badd385a68d
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Filesize
3.3MB
MD5a41341f861fb5f7b9782154af3f08bc1
SHA1f353b3531ea73e728fc45372316b4ae4fa1710ee
SHA256a3bbe8d481b68487f0e5522b14232d43b02dd1979ec18892a4f4207796d94e69
SHA5125417c2116e4e0aded40f3402210c85087a4dabe43ba55d888b16ebd80390d0ccb4cb46acbe36935af0428cb1d7351bdbf067081a2c1ccfc749959badd385a68d
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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
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