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
10-01-2023 08:46
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
1.2MB
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MD5
d5fa0e75a1e60d1010a4af2a07d0211d
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SHA1
3c32b47f93afe125ea792a6c8a4371ace5642f0f
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SHA256
c8a0f5ca478f472db08fb736e7b1ea7049bf407a2d66a97b98e31374f25db893
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SHA512
3bbb97ee8288af1418a6f4ef687b21759bc0b763a4cb3d2d851a5e3d4601f39e29a0f5ca678c02979a7b5e2bdcc932a16863da964f1136245bfc4b6f72221da9
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SSDEEP
24576:R20/+556azfi4ciql9vO7LrzA5UhoS+k+c1V+6Skl5l/Hld:R25Iaz3aRULrz9hoMhl5V
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
Processes:
file.tmpKitFiles136.exeCW4iffSVrwn.exepid process 5048 file.tmp 4936 KitFiles136.exe 1388 CW4iffSVrwn.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
KitFiles136.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation KitFiles136.exe -
Loads dropped DLL 1 IoCs
Processes:
file.tmppid process 5048 file.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
Processes:
file.tmpdescription ioc process File created C:\Program Files (x86)\Split Files\is-DMDT6.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-P08SH.tmp file.tmp File created C:\Program Files (x86)\Split Files\is-8OOQO.tmp file.tmp File created C:\Program Files (x86)\Split Files\unins000.dat file.tmp File created C:\Program Files (x86)\Split Files\language\is-2TE7A.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-BQPES.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-I1LQV.tmp file.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat file.tmp File created C:\Program Files (x86)\Split Files\language\is-6DSDM.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-F66EU.tmp file.tmp File created C:\Program Files (x86)\Split Files\is-MHR5R.tmp file.tmp File created C:\Program Files (x86)\Split Files\is-S7I0F.tmp file.tmp File created C:\Program Files (x86)\Split Files\is-2CKD5.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-9G13M.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-IPBJA.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-NDCJR.tmp file.tmp File opened for modification C:\Program Files (x86)\Split Files\KitFiles136.exe file.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
Processes:
taskkill.exepid process 3748 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
Processes:
KitFiles136.exepid process 4936 KitFiles136.exe 4936 KitFiles136.exe 4936 KitFiles136.exe 4936 KitFiles136.exe 4936 KitFiles136.exe 4936 KitFiles136.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
taskkill.exedescription pid process Token: SeDebugPrivilege 3748 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
Processes:
file.exefile.tmpKitFiles136.execmd.exedescription pid process target process PID 1812 wrote to memory of 5048 1812 file.exe file.tmp PID 1812 wrote to memory of 5048 1812 file.exe file.tmp PID 1812 wrote to memory of 5048 1812 file.exe file.tmp PID 5048 wrote to memory of 4936 5048 file.tmp KitFiles136.exe PID 5048 wrote to memory of 4936 5048 file.tmp KitFiles136.exe PID 5048 wrote to memory of 4936 5048 file.tmp KitFiles136.exe PID 4936 wrote to memory of 1388 4936 KitFiles136.exe CW4iffSVrwn.exe PID 4936 wrote to memory of 1388 4936 KitFiles136.exe CW4iffSVrwn.exe PID 4936 wrote to memory of 1388 4936 KitFiles136.exe CW4iffSVrwn.exe PID 4936 wrote to memory of 3848 4936 KitFiles136.exe cmd.exe PID 4936 wrote to memory of 3848 4936 KitFiles136.exe cmd.exe PID 4936 wrote to memory of 3848 4936 KitFiles136.exe cmd.exe PID 3848 wrote to memory of 3748 3848 cmd.exe taskkill.exe PID 3848 wrote to memory of 3748 3848 cmd.exe taskkill.exe PID 3848 wrote to memory of 3748 3848 cmd.exe taskkill.exe
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:1812 -
C:\Users\Admin\AppData\Local\Temp\is-TDNJJ.tmp\file.tmp"C:\Users\Admin\AppData\Local\Temp\is-TDNJJ.tmp\file.tmp" /SL5="$90056,1036398,51712,C:\Users\Admin\AppData\Local\Temp\file.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:5048 -
C:\Program Files (x86)\Split Files\KitFiles136.exe"C:\Program Files (x86)\Split Files\KitFiles136.exe"3⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4936 -
C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\CW4iffSVrwn.exe4⤵
- Executes dropped EXE
PID:1388 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "KitFiles136.exe" /f & erase "C:\Program Files (x86)\Split Files\KitFiles136.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
PID:3848 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "KitFiles136.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:3748
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
1.8MB
MD5e0c550686b8621c89f1965dc4ef653af
SHA105a5cf5656c4dbafc3abc3ac558f28ff273e1695
SHA256b1efb5df562bf09b8d776ed24b0005c09bdaa46b3ec75f23178c3e8d7992ed88
SHA5122bb54e276a32ecf4fecf55645388abe2124d4820ea1abc6a4e0eb2a72a0f83c16e5476004a908adf66505f993d728521303d9e57c56a17d39db97ed1aaf1ff36
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Filesize
1.8MB
MD5e0c550686b8621c89f1965dc4ef653af
SHA105a5cf5656c4dbafc3abc3ac558f28ff273e1695
SHA256b1efb5df562bf09b8d776ed24b0005c09bdaa46b3ec75f23178c3e8d7992ed88
SHA5122bb54e276a32ecf4fecf55645388abe2124d4820ea1abc6a4e0eb2a72a0f83c16e5476004a908adf66505f993d728521303d9e57c56a17d39db97ed1aaf1ff36
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Filesize
2KB
MD5a69559718ab506675e907fe49deb71e9
SHA1bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA2562f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
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Filesize
692KB
MD5011df348d33aeb3103be711e7aaad000
SHA1eff06d4777d24ab7c2384737b846b7df7c9dd5ae
SHA2564f50389dd834b3268fcc673f791d82a61142eeb7baaa54a03668516df18507ef
SHA512e4b76ac1058880a8ba633f0ff37657594a92231cc6093b80dc6c3617d3edd045f1a3592c2b04cf5acbdbb599d2e4b9e079a47e92692912f4f0d7d189dd14b375
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Filesize
692KB
MD5011df348d33aeb3103be711e7aaad000
SHA1eff06d4777d24ab7c2384737b846b7df7c9dd5ae
SHA2564f50389dd834b3268fcc673f791d82a61142eeb7baaa54a03668516df18507ef
SHA512e4b76ac1058880a8ba633f0ff37657594a92231cc6093b80dc6c3617d3edd045f1a3592c2b04cf5acbdbb599d2e4b9e079a47e92692912f4f0d7d189dd14b375
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c