Analysis
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max time kernel
121s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
10-01-2023 17:31
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
1dfb213cb60883047e082c8411f1af96
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SHA1
79c563f5e3d6e62bef3aac68ee46ec13bbef8728
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SHA256
feb019239e9e9a77cf4a958897cec89ba154bd471f7981d56868d233dad8a197
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SHA512
091db1eeca19cf3cdfdf5fa5bbcd83b04ea808a55d24a0360822238b2bf9390779dec2df94f24d5b81a7a35de25b613659f8ef0b599881231ca53d2ef5fdb956
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SSDEEP
24576:R20amjyg2pDh5kK7nbfVnc/MAkGVRbQqR9+scKlW1CmQgAJB4Skl5l/Hld:R2WjygQDLkK7btncnkARPvplW1CmsulT
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.exeeQ1l3Cuko.exepid process 4100 file.tmp 1804 KitFiles136.exe 4188 eQ1l3Cuko.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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation KitFiles136.exe -
Loads dropped DLL 1 IoCs
Processes:
file.tmppid process 4100 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-P5U19.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-E3SPL.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-C3TDD.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-27D09.tmp file.tmp File created C:\Program Files (x86)\Split Files\is-1MUMB.tmp file.tmp File created C:\Program Files (x86)\Split Files\is-DOQIC.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-SQ1PC.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-23GV3.tmp file.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat 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-7R2DH.tmp file.tmp File created C:\Program Files (x86)\Split Files\is-3K1P6.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-9J2H6.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-I094U.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-M47GE.tmp file.tmp File created C:\Program Files (x86)\Split Files\is-OKKO5.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 2188 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
Processes:
KitFiles136.exepid process 1804 KitFiles136.exe 1804 KitFiles136.exe 1804 KitFiles136.exe 1804 KitFiles136.exe 1804 KitFiles136.exe 1804 KitFiles136.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
taskkill.exedescription pid process Token: SeDebugPrivilege 2188 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
Processes:
file.exefile.tmpKitFiles136.execmd.exedescription pid process target process PID 4812 wrote to memory of 4100 4812 file.exe file.tmp PID 4812 wrote to memory of 4100 4812 file.exe file.tmp PID 4812 wrote to memory of 4100 4812 file.exe file.tmp PID 4100 wrote to memory of 1804 4100 file.tmp KitFiles136.exe PID 4100 wrote to memory of 1804 4100 file.tmp KitFiles136.exe PID 4100 wrote to memory of 1804 4100 file.tmp KitFiles136.exe PID 1804 wrote to memory of 4188 1804 KitFiles136.exe eQ1l3Cuko.exe PID 1804 wrote to memory of 4188 1804 KitFiles136.exe eQ1l3Cuko.exe PID 1804 wrote to memory of 4188 1804 KitFiles136.exe eQ1l3Cuko.exe PID 1804 wrote to memory of 5108 1804 KitFiles136.exe cmd.exe PID 1804 wrote to memory of 5108 1804 KitFiles136.exe cmd.exe PID 1804 wrote to memory of 5108 1804 KitFiles136.exe cmd.exe PID 5108 wrote to memory of 2188 5108 cmd.exe taskkill.exe PID 5108 wrote to memory of 2188 5108 cmd.exe taskkill.exe PID 5108 wrote to memory of 2188 5108 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:4812 -
C:\Users\Admin\AppData\Local\Temp\is-AO7IO.tmp\file.tmp"C:\Users\Admin\AppData\Local\Temp\is-AO7IO.tmp\file.tmp" /SL5="$801BE,889812,51712,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:4100 -
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:1804 -
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\eQ1l3Cuko.exe4⤵
- Executes dropped EXE
PID:4188 -
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:5108 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "KitFiles136.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:2188
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
1.6MB
MD547be727e8f2ea811651b554e1b1ffb06
SHA12bd23a4971bab5bb86b1c475097a2c3c060dd945
SHA256cbe7bb78e0ea834d1742e45f3a0bfb7316ce342061c97dc35269838b190d69e4
SHA5127700f841a0c3fe62bf0db3fe3b67ce0e1aa7dfb36e71277bacd28ae9bc7eec0d8376d729c036ea11a89d4aec4226fbfc9177f1c3fda2b98ac9e27e11093a9d6c
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Filesize
1.6MB
MD547be727e8f2ea811651b554e1b1ffb06
SHA12bd23a4971bab5bb86b1c475097a2c3c060dd945
SHA256cbe7bb78e0ea834d1742e45f3a0bfb7316ce342061c97dc35269838b190d69e4
SHA5127700f841a0c3fe62bf0db3fe3b67ce0e1aa7dfb36e71277bacd28ae9bc7eec0d8376d729c036ea11a89d4aec4226fbfc9177f1c3fda2b98ac9e27e11093a9d6c
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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