Analysis
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max time kernel
91s -
max time network
145s -
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, 05:46
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
2.0MB
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MD5
6ddb3602fcf467ce52e84ba90b0fc7a2
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SHA1
63c10c8e48e03d1601103b022d2f3ec2e058dee7
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SHA256
59b487c3d532bc115fbcd6f53b49cd739deb8d5029372d55e5c182f2dd33cc93
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SHA512
1b3a19c55643bea02df610f7255056de528031fec018a39885c38fe79fad82dda533d92fa5dd21eec90793e2cc9b4737dd96a528df968faff5aab0ff46e2f6ae
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SSDEEP
49152:v9EsVdUsrdxVguVKpg0J8Yj2UO0tnEFkeVWP7p33:v9EijrLlKpyY6UEFk6Gd3
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 4684 is-8JGL8.tmp 4728 SplitFiles118.exe 4300 tX0OcoiN.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-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation SplitFiles118.exe -
Loads dropped DLL 1 IoCs
pid Process 4684 is-8JGL8.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-HJ24P.tmp is-8JGL8.tmp File created C:\Program Files (x86)\Split Files\language\is-4DBCH.tmp is-8JGL8.tmp File created C:\Program Files (x86)\Split Files\is-214FV.tmp is-8JGL8.tmp File created C:\Program Files (x86)\Split Files\is-RBBB5.tmp is-8JGL8.tmp File created C:\Program Files (x86)\Split Files\language\is-4N0J7.tmp is-8JGL8.tmp File created C:\Program Files (x86)\Split Files\language\is-AS2NP.tmp is-8JGL8.tmp File created C:\Program Files (x86)\Split Files\is-UDPHP.tmp is-8JGL8.tmp File created C:\Program Files (x86)\Split Files\language\is-LC0UF.tmp is-8JGL8.tmp File created C:\Program Files (x86)\Split Files\language\is-UAA3F.tmp is-8JGL8.tmp File created C:\Program Files (x86)\Split Files\is-AON3J.tmp is-8JGL8.tmp File created C:\Program Files (x86)\Split Files\unins000.dat is-8JGL8.tmp File created C:\Program Files (x86)\Split Files\is-6JLD8.tmp is-8JGL8.tmp File created C:\Program Files (x86)\Split Files\language\is-DS9V1.tmp is-8JGL8.tmp File created C:\Program Files (x86)\Split Files\language\is-L3CUA.tmp is-8JGL8.tmp File created C:\Program Files (x86)\Split Files\language\is-6EUCV.tmp is-8JGL8.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-8JGL8.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles118.exe is-8JGL8.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 3424 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 4728 SplitFiles118.exe 4728 SplitFiles118.exe 4728 SplitFiles118.exe 4728 SplitFiles118.exe 4728 SplitFiles118.exe 4728 SplitFiles118.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 3424 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 432 wrote to memory of 4684 432 file.exe 80 PID 432 wrote to memory of 4684 432 file.exe 80 PID 432 wrote to memory of 4684 432 file.exe 80 PID 4684 wrote to memory of 4728 4684 is-8JGL8.tmp 81 PID 4684 wrote to memory of 4728 4684 is-8JGL8.tmp 81 PID 4684 wrote to memory of 4728 4684 is-8JGL8.tmp 81 PID 4728 wrote to memory of 4300 4728 SplitFiles118.exe 82 PID 4728 wrote to memory of 4300 4728 SplitFiles118.exe 82 PID 4728 wrote to memory of 4300 4728 SplitFiles118.exe 82 PID 4728 wrote to memory of 1812 4728 SplitFiles118.exe 90 PID 4728 wrote to memory of 1812 4728 SplitFiles118.exe 90 PID 4728 wrote to memory of 1812 4728 SplitFiles118.exe 90 PID 1812 wrote to memory of 3424 1812 cmd.exe 92 PID 1812 wrote to memory of 3424 1812 cmd.exe 92 PID 1812 wrote to memory of 3424 1812 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:432 -
C:\Users\Admin\AppData\Local\Temp\is-J7FK2.tmp\is-8JGL8.tmp"C:\Users\Admin\AppData\Local\Temp\is-J7FK2.tmp\is-8JGL8.tmp" /SL4 $B01D8 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1801131 1331202⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:4684 -
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:4728 -
C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\tX0OcoiN.exe4⤵
- Executes dropped EXE
PID:4300
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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:1812 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles118.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:3424
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.3MB
MD5a8568a5826af3bd4f8869f1281b559ab
SHA1e143a1d8545949beed68188a24e63b1ab5fe642f
SHA256f5f56b934b9dc3622516c13021f89c48dad93b0cedfe77bb3bb1029ba8daa207
SHA512e01555afa6d07cd02c9c46a38692cea7a6e1c7f86864bdb6abc2adec3ad6dbee767223a27de37d7672a99925fab5c7926c7f7db47189fb48e5ffd01f82ab8e54
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Filesize
3.3MB
MD5a8568a5826af3bd4f8869f1281b559ab
SHA1e143a1d8545949beed68188a24e63b1ab5fe642f
SHA256f5f56b934b9dc3622516c13021f89c48dad93b0cedfe77bb3bb1029ba8daa207
SHA512e01555afa6d07cd02c9c46a38692cea7a6e1c7f86864bdb6abc2adec3ad6dbee767223a27de37d7672a99925fab5c7926c7f7db47189fb48e5ffd01f82ab8e54
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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