Analysis
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max time kernel
91s -
max time network
148s -
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 18:01
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
1.1MB
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MD5
8aba67f9683dd2043cb6338b3892a2c9
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SHA1
6d60c7085155fc11d1aa187fefa25722acde7fab
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SHA256
2c428b1e3886ecc2e75dc048b3d3204bbb7aef493a755db84fdcb49af86ec776
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SHA512
f9beb2fe07e2d1643b64ea9bf3e427d89c462d4a88026dcb931925b860d4ebc17683f505082cd1566f6afff9e64e4f4b0a8180928efc26b0f9a030454e99963c
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SSDEEP
24576:R20KMEKljYo0VAiU6yXJWZhxPTO5bI0qWXvvVbmQ4Skl5l/Hld:R2kxjY7OJWZhlTOJRqWfNaQul5V
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.exeYyEvPLj.exepid process 4232 file.tmp 3132 KitFiles136.exe 752 YyEvPLj.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 4232 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\language\is-5NAAU.tmp file.tmp File created C:\Program Files (x86)\Split Files\is-FA9P3.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-18OI7.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-A6UGF.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-13CU0.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-M5LE3.tmp file.tmp File created C:\Program Files (x86)\Split Files\is-BBLPN.tmp file.tmp File created C:\Program Files (x86)\Split Files\is-TDHN0.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-RG3LB.tmp file.tmp File created C:\Program Files (x86)\Split Files\is-QOOH4.tmp file.tmp File opened for modification C:\Program Files (x86)\Split Files\KitFiles136.exe file.tmp File created C:\Program Files (x86)\Split Files\language\is-OFV63.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-CTP9C.tmp file.tmp File created C:\Program Files (x86)\Split Files\is-VGUCJ.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\unins000.dat file.tmp File created C:\Program Files (x86)\Split Files\language\is-EA4BK.tmp 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 4720 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
Processes:
KitFiles136.exepid process 3132 KitFiles136.exe 3132 KitFiles136.exe 3132 KitFiles136.exe 3132 KitFiles136.exe 3132 KitFiles136.exe 3132 KitFiles136.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
taskkill.exedescription pid process Token: SeDebugPrivilege 4720 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
Processes:
file.exefile.tmpKitFiles136.execmd.exedescription pid process target process PID 2620 wrote to memory of 4232 2620 file.exe file.tmp PID 2620 wrote to memory of 4232 2620 file.exe file.tmp PID 2620 wrote to memory of 4232 2620 file.exe file.tmp PID 4232 wrote to memory of 3132 4232 file.tmp KitFiles136.exe PID 4232 wrote to memory of 3132 4232 file.tmp KitFiles136.exe PID 4232 wrote to memory of 3132 4232 file.tmp KitFiles136.exe PID 3132 wrote to memory of 752 3132 KitFiles136.exe YyEvPLj.exe PID 3132 wrote to memory of 752 3132 KitFiles136.exe YyEvPLj.exe PID 3132 wrote to memory of 752 3132 KitFiles136.exe YyEvPLj.exe PID 3132 wrote to memory of 952 3132 KitFiles136.exe cmd.exe PID 3132 wrote to memory of 952 3132 KitFiles136.exe cmd.exe PID 3132 wrote to memory of 952 3132 KitFiles136.exe cmd.exe PID 952 wrote to memory of 4720 952 cmd.exe taskkill.exe PID 952 wrote to memory of 4720 952 cmd.exe taskkill.exe PID 952 wrote to memory of 4720 952 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:2620 -
C:\Users\Admin\AppData\Local\Temp\is-33JEF.tmp\file.tmp"C:\Users\Admin\AppData\Local\Temp\is-33JEF.tmp\file.tmp" /SL5="$B01D8,883810,51712,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:4232 -
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:3132 -
C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\YyEvPLj.exe4⤵
- Executes dropped EXE
PID:752 -
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:952 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "KitFiles136.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4720
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
1.6MB
MD59bfcd2cff025ffaeaadf2022e089a89c
SHA1d75fa0ca1358123cf6d195273efbca1138426d4e
SHA2567a78d1e219b93515c275a63b59eb444a25187e13a5ccabf688f13f3223545b46
SHA5124668145af8617c1c666626a90630109f62fc0b3b2255f4ed21a6ecdb0705e431bab8ced34ef1817bf035f61c6eb8f402ddbeca716560fb5bbe25da32d6653952
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Filesize
1.6MB
MD59bfcd2cff025ffaeaadf2022e089a89c
SHA1d75fa0ca1358123cf6d195273efbca1138426d4e
SHA2567a78d1e219b93515c275a63b59eb444a25187e13a5ccabf688f13f3223545b46
SHA5124668145af8617c1c666626a90630109f62fc0b3b2255f4ed21a6ecdb0705e431bab8ced34ef1817bf035f61c6eb8f402ddbeca716560fb5bbe25da32d6653952
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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
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