Analysis
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max time kernel
91s -
max time network
132s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
10-01-2023 09:47
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
1.0MB
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MD5
37c9e1e8591776c97a50d29c9564318b
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SHA1
9432e581692dc7c82aaf5cd70230256ae7d0dfeb
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SHA256
ce079fec8a65567a10c103e9aad0c15a9378fdf85732f5f42fcb00f3f08ae2c4
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SHA512
ab3ae1e650f0b4432a1be2aa4c6e469fd9adbb917122551769a86254de55139c35d29a03735daec1924aa26b028abd5741541f1955fbc64390f56e8422bc975f
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SSDEEP
24576:R20Ak8Q5AVmPpU+KFJaeeTPKYp43Tgknlc51LesEF0/uSkl5l/Hld:R2G8Q6VmPakeenp43Tgknl6esEF0sl5V
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.exeYvRkbcB.exepid process 4060 file.tmp 1652 KitFiles136.exe 4360 YvRkbcB.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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation KitFiles136.exe -
Loads dropped DLL 1 IoCs
Processes:
file.tmppid process 4060 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-OHQ9G.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-U459E.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-6UEMG.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-9TQ3P.tmp file.tmp File created C:\Program Files (x86)\Split Files\is-BFBN2.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\unins000.dat file.tmp File created C:\Program Files (x86)\Split Files\language\is-JR29F.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-SO79D.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-BPB2R.tmp file.tmp File created C:\Program Files (x86)\Split Files\is-UB51E.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-9T32I.tmp file.tmp File created C:\Program Files (x86)\Split Files\is-CGL1F.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-REBKJ.tmp file.tmp File created C:\Program Files (x86)\Split Files\language\is-N466D.tmp file.tmp File created C:\Program Files (x86)\Split Files\is-913A9.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 4740 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
Processes:
KitFiles136.exepid process 1652 KitFiles136.exe 1652 KitFiles136.exe 1652 KitFiles136.exe 1652 KitFiles136.exe 1652 KitFiles136.exe 1652 KitFiles136.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
taskkill.exedescription pid process Token: SeDebugPrivilege 4740 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
Processes:
file.exefile.tmpKitFiles136.execmd.exedescription pid process target process PID 4936 wrote to memory of 4060 4936 file.exe file.tmp PID 4936 wrote to memory of 4060 4936 file.exe file.tmp PID 4936 wrote to memory of 4060 4936 file.exe file.tmp PID 4060 wrote to memory of 1652 4060 file.tmp KitFiles136.exe PID 4060 wrote to memory of 1652 4060 file.tmp KitFiles136.exe PID 4060 wrote to memory of 1652 4060 file.tmp KitFiles136.exe PID 1652 wrote to memory of 4360 1652 KitFiles136.exe YvRkbcB.exe PID 1652 wrote to memory of 4360 1652 KitFiles136.exe YvRkbcB.exe PID 1652 wrote to memory of 4360 1652 KitFiles136.exe YvRkbcB.exe PID 1652 wrote to memory of 4460 1652 KitFiles136.exe cmd.exe PID 1652 wrote to memory of 4460 1652 KitFiles136.exe cmd.exe PID 1652 wrote to memory of 4460 1652 KitFiles136.exe cmd.exe PID 4460 wrote to memory of 4740 4460 cmd.exe taskkill.exe PID 4460 wrote to memory of 4740 4460 cmd.exe taskkill.exe PID 4460 wrote to memory of 4740 4460 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:4936 -
C:\Users\Admin\AppData\Local\Temp\is-5MM0H.tmp\file.tmp"C:\Users\Admin\AppData\Local\Temp\is-5MM0H.tmp\file.tmp" /SL5="$C003A,855234,51712,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:4060 -
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:1652 -
C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\YvRkbcB.exe4⤵
- Executes dropped EXE
PID:4360 -
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:4460 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "KitFiles136.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4740
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
1.6MB
MD54ed50b66c0d8e59bc122a709d684206c
SHA1f26666a0788df546e8016f62735559cfe43d61c4
SHA256ed2ac6892723d17df65a2249c39f667a542301279d3914805aa958f63f6e66b9
SHA5124ed2c3abf882908b41273b6b704155d9c43a4356db69b32868e1e782f51e7ee62e6412555d1692bca74e13b64419f7da2848432d61cc5cd15752b4547bb0f2c3
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Filesize
1.6MB
MD54ed50b66c0d8e59bc122a709d684206c
SHA1f26666a0788df546e8016f62735559cfe43d61c4
SHA256ed2ac6892723d17df65a2249c39f667a542301279d3914805aa958f63f6e66b9
SHA5124ed2c3abf882908b41273b6b704155d9c43a4356db69b32868e1e782f51e7ee62e6412555d1692bca74e13b64419f7da2848432d61cc5cd15752b4547bb0f2c3
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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