Analysis
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max time kernel
70s -
max time network
128s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
28/12/2022, 23:45
Static task
static1
Behavioral task
behavioral1
Sample
c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe
Resource
win7-20220812-en
General
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Target
c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe
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Size
2.0MB
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MD5
9368880685abae2eadbdf926805f413f
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SHA1
4e1096c5b04be49149d8f9a8cc80a46f25caaa62
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SHA256
c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551
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SHA512
9e4b64a36807e587e0db0d349735d33fc47cfe8a6232e18316d727b92febef46fcb1ca6f370b28d0e10c6ef900df9e7affdbd556f745ef6c7d2dd008fd40603e
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SSDEEP
49152:mivLILS+BVV+OGR2K5OVIMDKDQysyIJmIrdauzdDVUDXKE:miv8RrM77m8QyIJmy8u2
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 4360 is-P5UI2.tmp 4204 SplitFiles123.exe 1340 2mULbF8.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 SplitFiles123.exe -
Loads dropped DLL 1 IoCs
pid Process 4360 is-P5UI2.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-MHG7T.tmp is-P5UI2.tmp File created C:\Program Files (x86)\Split Files\is-1J8IE.tmp is-P5UI2.tmp File created C:\Program Files (x86)\Split Files\is-5MIHE.tmp is-P5UI2.tmp File created C:\Program Files (x86)\Split Files\is-RVUUT.tmp is-P5UI2.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles123.exe is-P5UI2.tmp File created C:\Program Files (x86)\Split Files\unins000.dat is-P5UI2.tmp File created C:\Program Files (x86)\Split Files\language\is-PHS02.tmp is-P5UI2.tmp File created C:\Program Files (x86)\Split Files\language\is-U23RD.tmp is-P5UI2.tmp File created C:\Program Files (x86)\Split Files\language\is-TSSDG.tmp is-P5UI2.tmp File created C:\Program Files (x86)\Split Files\language\is-M9MCL.tmp is-P5UI2.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-P5UI2.tmp File created C:\Program Files (x86)\Split Files\is-K7LBI.tmp is-P5UI2.tmp File created C:\Program Files (x86)\Split Files\language\is-DL5SH.tmp is-P5UI2.tmp File created C:\Program Files (x86)\Split Files\language\is-4PB41.tmp is-P5UI2.tmp File created C:\Program Files (x86)\Split Files\language\is-J18IE.tmp is-P5UI2.tmp File created C:\Program Files (x86)\Split Files\language\is-I0G25.tmp is-P5UI2.tmp File created C:\Program Files (x86)\Split Files\is-59LQL.tmp is-P5UI2.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 2800 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 4204 SplitFiles123.exe 4204 SplitFiles123.exe 4204 SplitFiles123.exe 4204 SplitFiles123.exe 4204 SplitFiles123.exe 4204 SplitFiles123.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2800 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 4556 wrote to memory of 4360 4556 c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe 81 PID 4556 wrote to memory of 4360 4556 c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe 81 PID 4556 wrote to memory of 4360 4556 c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe 81 PID 4360 wrote to memory of 4204 4360 is-P5UI2.tmp 82 PID 4360 wrote to memory of 4204 4360 is-P5UI2.tmp 82 PID 4360 wrote to memory of 4204 4360 is-P5UI2.tmp 82 PID 4204 wrote to memory of 1340 4204 SplitFiles123.exe 83 PID 4204 wrote to memory of 1340 4204 SplitFiles123.exe 83 PID 4204 wrote to memory of 1340 4204 SplitFiles123.exe 83 PID 4204 wrote to memory of 3740 4204 SplitFiles123.exe 91 PID 4204 wrote to memory of 3740 4204 SplitFiles123.exe 91 PID 4204 wrote to memory of 3740 4204 SplitFiles123.exe 91 PID 3740 wrote to memory of 2800 3740 cmd.exe 93 PID 3740 wrote to memory of 2800 3740 cmd.exe 93 PID 3740 wrote to memory of 2800 3740 cmd.exe 93
Processes
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C:\Users\Admin\AppData\Local\Temp\c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe"C:\Users\Admin\AppData\Local\Temp\c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:4556 -
C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp"C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp" /SL4 $A004C "C:\Users\Admin\AppData\Local\Temp\c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe" 1794182 2176002⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:4360 -
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:4204 -
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\2mULbF8.exe4⤵
- Executes dropped EXE
PID:1340
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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:3740 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles123.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:2800
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
3.2MB
MD5d0f0f4163552b63aed54081a28adf050
SHA1fd67d697f41e714bc8ebec7364d78a012106242a
SHA256da6e6ed6476e3e0a0528ccb94a0992eb3174a251fe68f21d17ecfe6fd0263c40
SHA5126016e806cbbb62d4eca5b1103c8a3ec1d27ce87e4377f30d1087c6d0367c1d9ca90b5ad4ab11cb0f79a550825fb90e3fa19f24b3af2f6f6802bb4da38f3f579b
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Filesize
3.2MB
MD5d0f0f4163552b63aed54081a28adf050
SHA1fd67d697f41e714bc8ebec7364d78a012106242a
SHA256da6e6ed6476e3e0a0528ccb94a0992eb3174a251fe68f21d17ecfe6fd0263c40
SHA5126016e806cbbb62d4eca5b1103c8a3ec1d27ce87e4377f30d1087c6d0367c1d9ca90b5ad4ab11cb0f79a550825fb90e3fa19f24b3af2f6f6802bb4da38f3f579b
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Filesize
806KB
MD54f3db9263ab998737f14cfb0cc7da686
SHA11f3947a6b5c900f28a93abb7a097aea5efa76f58
SHA256f8ce6681396db8b8a95cdf7dbf02b68c847922aeacd0277a52a4e5ca399f87aa
SHA51260d5207b7af2dadf63aeb6123ed466e779cc9b04ca15f303416b348b8e5ee9c147ee578d5e586df749d1facf460c84090436a0d4944fdebd334373f0f6c18f8d
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Filesize
806KB
MD54f3db9263ab998737f14cfb0cc7da686
SHA11f3947a6b5c900f28a93abb7a097aea5efa76f58
SHA256f8ce6681396db8b8a95cdf7dbf02b68c847922aeacd0277a52a4e5ca399f87aa
SHA51260d5207b7af2dadf63aeb6123ed466e779cc9b04ca15f303416b348b8e5ee9c147ee578d5e586df749d1facf460c84090436a0d4944fdebd334373f0f6c18f8d
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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