Analysis
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max time kernel
91s -
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
23/12/2022, 07:01
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
90f71d6620570d1f2ee5d34c87d65eb4
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SHA1
593a5f327647828641cb27bacb994c52bc3d37ab
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SHA256
c32f88179090263121c467ebe00e1cfbbd6a8df66fd7e4f2497fbd6e0432998e
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SHA512
f8a8b1f6069b60e77bf4f70fde02fa990f0ae148da833333d38d641eae5c8f766f6d75db5c10490d1cc519dad1cf312ee2976e1e95c39b4ea77895520c4dd5b3
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SSDEEP
49152:b0JdN0OOfnO+3Bqoni2vh13h4UT8+glDrjXWP7p3u:bGdNJOWCzniShBY+yrbGdu
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 5016 is-65O3C.tmp 3712 SplitFiles118.exe 816 vvMb0jaaN3T8x.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 5016 is-65O3C.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-2H8VT.tmp is-65O3C.tmp File created C:\Program Files (x86)\Split Files\is-86A0T.tmp is-65O3C.tmp File created C:\Program Files (x86)\Split Files\is-P80I8.tmp is-65O3C.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-65O3C.tmp File created C:\Program Files (x86)\Split Files\is-581GV.tmp is-65O3C.tmp File created C:\Program Files (x86)\Split Files\language\is-7BS0I.tmp is-65O3C.tmp File created C:\Program Files (x86)\Split Files\language\is-LB4LI.tmp is-65O3C.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles118.exe is-65O3C.tmp File created C:\Program Files (x86)\Split Files\is-VU0UM.tmp is-65O3C.tmp File created C:\Program Files (x86)\Split Files\unins000.dat is-65O3C.tmp File created C:\Program Files (x86)\Split Files\language\is-RRDSO.tmp is-65O3C.tmp File created C:\Program Files (x86)\Split Files\language\is-PNAOU.tmp is-65O3C.tmp File created C:\Program Files (x86)\Split Files\language\is-VM64Q.tmp is-65O3C.tmp File created C:\Program Files (x86)\Split Files\is-IVO78.tmp is-65O3C.tmp File created C:\Program Files (x86)\Split Files\language\is-I2V4C.tmp is-65O3C.tmp File created C:\Program Files (x86)\Split Files\language\is-32NB7.tmp is-65O3C.tmp File created C:\Program Files (x86)\Split Files\language\is-LHEHM.tmp is-65O3C.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 2380 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 3712 SplitFiles118.exe 3712 SplitFiles118.exe 3712 SplitFiles118.exe 3712 SplitFiles118.exe 3712 SplitFiles118.exe 3712 SplitFiles118.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2380 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 3780 wrote to memory of 5016 3780 file.exe 80 PID 3780 wrote to memory of 5016 3780 file.exe 80 PID 3780 wrote to memory of 5016 3780 file.exe 80 PID 5016 wrote to memory of 3712 5016 is-65O3C.tmp 81 PID 5016 wrote to memory of 3712 5016 is-65O3C.tmp 81 PID 5016 wrote to memory of 3712 5016 is-65O3C.tmp 81 PID 3712 wrote to memory of 816 3712 SplitFiles118.exe 85 PID 3712 wrote to memory of 816 3712 SplitFiles118.exe 85 PID 3712 wrote to memory of 816 3712 SplitFiles118.exe 85 PID 3712 wrote to memory of 940 3712 SplitFiles118.exe 90 PID 3712 wrote to memory of 940 3712 SplitFiles118.exe 90 PID 3712 wrote to memory of 940 3712 SplitFiles118.exe 90 PID 940 wrote to memory of 2380 940 cmd.exe 92 PID 940 wrote to memory of 2380 940 cmd.exe 92 PID 940 wrote to memory of 2380 940 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:3780 -
C:\Users\Admin\AppData\Local\Temp\is-U9DEO.tmp\is-65O3C.tmp"C:\Users\Admin\AppData\Local\Temp\is-U9DEO.tmp\is-65O3C.tmp" /SL4 $7005C "C:\Users\Admin\AppData\Local\Temp\file.exe" 1721411 1331202⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:5016 -
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:3712 -
C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\vvMb0jaaN3T8x.exe4⤵
- Executes dropped EXE
PID:816
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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:940 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles118.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:2380
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.3MB
MD5af501573f87c730b5179fadf4feab7ee
SHA1359ce7d1a92c5f68922cbf473c79113620187a45
SHA2567ab99ad4b91702a53205aaf5de53284d6b1eb307b75170c30d632ef3ccf3622d
SHA51252b52efea726d6aa0e7fd749329db6f65a87f36dbcb2b247875c25cce2c0ec4cc038a4b74dea20d7f87db6b254ca4da74c6c57fcad8d548d70e1e3bde97eefd0
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Filesize
3.3MB
MD5af501573f87c730b5179fadf4feab7ee
SHA1359ce7d1a92c5f68922cbf473c79113620187a45
SHA2567ab99ad4b91702a53205aaf5de53284d6b1eb307b75170c30d632ef3ccf3622d
SHA51252b52efea726d6aa0e7fd749329db6f65a87f36dbcb2b247875c25cce2c0ec4cc038a4b74dea20d7f87db6b254ca4da74c6c57fcad8d548d70e1e3bde97eefd0
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Filesize
2KB
MD5a69559718ab506675e907fe49deb71e9
SHA1bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA2562f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
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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
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c