Analysis
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max time kernel
90s -
max time network
150s -
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, 05:16
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20220812-en
General
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Target
file.exe
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Size
2.0MB
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MD5
4a839f0222e27f316c945b44fb927da4
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SHA1
6ba6a0faf834cbafbf85518eb54d87c706b8b39a
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SHA256
6b27aecd127da414437282906e7b742996015c5377f90e5e4548bd62fc85ca84
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SHA512
fc4698d1bab056b905ba28bf7d9d9f24493c3ff292652e7f692bd0fdb49189fd53212aede69ce09e7f3841192594d72311caed2f298ab43f6603c32a415dd3c8
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SSDEEP
49152:rA+tdjxDiNGRs+pzmaw9SCaUA2D0/yTvi+hPZ5ByGpxWxhTWP7p3S:rAejxrC+yRaUSsX5BN6xlGdS
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 4756 is-8JR2T.tmp 5024 SplitFiles118.exe 5036 udzeGaXkIP.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 4756 is-8JR2T.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-51J7L.tmp is-8JR2T.tmp File created C:\Program Files (x86)\Split Files\language\is-J5BU5.tmp is-8JR2T.tmp File created C:\Program Files (x86)\Split Files\is-GSCLI.tmp is-8JR2T.tmp File created C:\Program Files (x86)\Split Files\is-1SL19.tmp is-8JR2T.tmp File created C:\Program Files (x86)\Split Files\unins000.dat is-8JR2T.tmp File created C:\Program Files (x86)\Split Files\is-3LHSC.tmp is-8JR2T.tmp File created C:\Program Files (x86)\Split Files\is-VAN42.tmp is-8JR2T.tmp File created C:\Program Files (x86)\Split Files\language\is-MEKBN.tmp is-8JR2T.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-8JR2T.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles118.exe is-8JR2T.tmp File created C:\Program Files (x86)\Split Files\language\is-PJ8M3.tmp is-8JR2T.tmp File created C:\Program Files (x86)\Split Files\language\is-SV82T.tmp is-8JR2T.tmp File created C:\Program Files (x86)\Split Files\language\is-06IK0.tmp is-8JR2T.tmp File created C:\Program Files (x86)\Split Files\is-MA47L.tmp is-8JR2T.tmp File created C:\Program Files (x86)\Split Files\language\is-2DTO7.tmp is-8JR2T.tmp File created C:\Program Files (x86)\Split Files\language\is-8FJCO.tmp is-8JR2T.tmp File created C:\Program Files (x86)\Split Files\language\is-PAL8E.tmp is-8JR2T.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 4212 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 5024 SplitFiles118.exe 5024 SplitFiles118.exe 5024 SplitFiles118.exe 5024 SplitFiles118.exe 5024 SplitFiles118.exe 5024 SplitFiles118.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 4212 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 4424 wrote to memory of 4756 4424 file.exe 80 PID 4424 wrote to memory of 4756 4424 file.exe 80 PID 4424 wrote to memory of 4756 4424 file.exe 80 PID 4756 wrote to memory of 5024 4756 is-8JR2T.tmp 81 PID 4756 wrote to memory of 5024 4756 is-8JR2T.tmp 81 PID 4756 wrote to memory of 5024 4756 is-8JR2T.tmp 81 PID 5024 wrote to memory of 5036 5024 SplitFiles118.exe 82 PID 5024 wrote to memory of 5036 5024 SplitFiles118.exe 82 PID 5024 wrote to memory of 5036 5024 SplitFiles118.exe 82 PID 5024 wrote to memory of 3244 5024 SplitFiles118.exe 90 PID 5024 wrote to memory of 3244 5024 SplitFiles118.exe 90 PID 5024 wrote to memory of 3244 5024 SplitFiles118.exe 90 PID 3244 wrote to memory of 4212 3244 cmd.exe 92 PID 3244 wrote to memory of 4212 3244 cmd.exe 92 PID 3244 wrote to memory of 4212 3244 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:4424 -
C:\Users\Admin\AppData\Local\Temp\is-83MB9.tmp\is-8JR2T.tmp"C:\Users\Admin\AppData\Local\Temp\is-83MB9.tmp\is-8JR2T.tmp" /SL4 $9004E "C:\Users\Admin\AppData\Local\Temp\file.exe" 1798793 1331202⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:4756 -
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:5024 -
C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\udzeGaXkIP.exe4⤵
- Executes dropped EXE
PID:5036
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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:3244 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles118.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4212
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
3.3MB
MD5946d99ac05db80c6b32420f0cf26e087
SHA1634856686e0e38237ea281b1a7663fac6204e7f7
SHA256ed7f8614d3811fea492110677611f95a2ac15e38ffc47abe4361196ebaa528fb
SHA512d6bd714866899143a52e2292cbb0bd780a45ebf3393e7459485e63dc0c3014767a85ce921d9d007b2ba8d0619b8987d498549b7d7769d86a763da5b2940b15c3
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Filesize
3.3MB
MD5946d99ac05db80c6b32420f0cf26e087
SHA1634856686e0e38237ea281b1a7663fac6204e7f7
SHA256ed7f8614d3811fea492110677611f95a2ac15e38ffc47abe4361196ebaa528fb
SHA512d6bd714866899143a52e2292cbb0bd780a45ebf3393e7459485e63dc0c3014767a85ce921d9d007b2ba8d0619b8987d498549b7d7769d86a763da5b2940b15c3
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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