Analysis
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max time kernel
91s -
max time network
144s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system -
submitted
18/11/2022, 17:01
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
2.0MB
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MD5
b517646f6b38547531ed29bcc5bb1217
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SHA1
c0402829596b3b2d2888a71aa7327aa59275e045
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SHA256
7bcfd3e7fae699fe4c106aaeaef12a5fc9a06cbe78278f5fa3d5bac99ffb7e0a
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SHA512
959cdae7ae2c198b8f57130e79c589cc318dbc16fd0043200d0da826d1eda83ef304655d8f86eed0c59f8a0f29e30d51d3d8f69acf215f2d95681c2f4e87ed83
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SSDEEP
49152:q2mGuhOdaZcEevXYwdV3eDsUswxCQxvlPXm3vJA0LqyHfRx7Pq2:rmGucEGXYw8qwUQxNPXUA0bPD
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 1504 is-NRTOD.tmp 4604 grsearcher83.exe 2700 XT3DZ5HN.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 grsearcher83.exe -
Loads dropped DLL 1 IoCs
pid Process 1504 is-NRTOD.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 12 IoCs
description ioc Process File created C:\Program Files (x86)\grSearcher\is-H74BJ.tmp is-NRTOD.tmp File created C:\Program Files (x86)\grSearcher\is-FBSDU.tmp is-NRTOD.tmp File created C:\Program Files (x86)\grSearcher\is-Q18UH.tmp is-NRTOD.tmp File created C:\Program Files (x86)\grSearcher\is-0R4SA.tmp is-NRTOD.tmp File opened for modification C:\Program Files (x86)\grSearcher\unins000.dat is-NRTOD.tmp File created C:\Program Files (x86)\grSearcher\unins000.dat is-NRTOD.tmp File created C:\Program Files (x86)\grSearcher\is-ITKHS.tmp is-NRTOD.tmp File created C:\Program Files (x86)\grSearcher\is-6MSJP.tmp is-NRTOD.tmp File opened for modification C:\Program Files (x86)\grSearcher\grsearcher83.exe is-NRTOD.tmp File created C:\Program Files (x86)\grSearcher\is-N0FMC.tmp is-NRTOD.tmp File created C:\Program Files (x86)\grSearcher\is-3SV92.tmp is-NRTOD.tmp File created C:\Program Files (x86)\grSearcher\is-6OJHQ.tmp is-NRTOD.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 1904 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 4604 grsearcher83.exe 4604 grsearcher83.exe 4604 grsearcher83.exe 4604 grsearcher83.exe 4604 grsearcher83.exe 4604 grsearcher83.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1904 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 4748 wrote to memory of 1504 4748 file.exe 81 PID 4748 wrote to memory of 1504 4748 file.exe 81 PID 4748 wrote to memory of 1504 4748 file.exe 81 PID 1504 wrote to memory of 4604 1504 is-NRTOD.tmp 82 PID 1504 wrote to memory of 4604 1504 is-NRTOD.tmp 82 PID 1504 wrote to memory of 4604 1504 is-NRTOD.tmp 82 PID 4604 wrote to memory of 2700 4604 grsearcher83.exe 85 PID 4604 wrote to memory of 2700 4604 grsearcher83.exe 85 PID 4604 wrote to memory of 2700 4604 grsearcher83.exe 85 PID 4604 wrote to memory of 880 4604 grsearcher83.exe 90 PID 4604 wrote to memory of 880 4604 grsearcher83.exe 90 PID 4604 wrote to memory of 880 4604 grsearcher83.exe 90 PID 880 wrote to memory of 1904 880 cmd.exe 92 PID 880 wrote to memory of 1904 880 cmd.exe 92 PID 880 wrote to memory of 1904 880 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:4748 -
C:\Users\Admin\AppData\Local\Temp\is-MP818.tmp\is-NRTOD.tmp"C:\Users\Admin\AppData\Local\Temp\is-MP818.tmp\is-NRTOD.tmp" /SL4 $A004E "C:\Users\Admin\AppData\Local\Temp\file.exe" 1794143 547842⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:1504 -
C:\Program Files (x86)\grSearcher\grsearcher83.exe"C:\Program Files (x86)\grSearcher\grsearcher83.exe"3⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4604 -
C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\XT3DZ5HN.exe4⤵
- Executes dropped EXE
PID:2700
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "grsearcher83.exe" /f & erase "C:\Program Files (x86)\grSearcher\grsearcher83.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
PID:880 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "grsearcher83.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1904
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
2.8MB
MD556435c3e9333001cb860f335ef4ed4c4
SHA180fb2c04a9f8caa061fc1ad2ecb7ff63aa6b1331
SHA2568c57faf2115e7ec25117a607799c6ca021dd2465852e576e304f273866f66f1a
SHA5128ae839363f1503bb7aa2570646694cea3e5261d226c78b44b33b37038be26a985b67e69cec73785ea7416232fdf967e51dce2a07d8eceacfe4fda7caadeed3c4
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Filesize
2.8MB
MD556435c3e9333001cb860f335ef4ed4c4
SHA180fb2c04a9f8caa061fc1ad2ecb7ff63aa6b1331
SHA2568c57faf2115e7ec25117a607799c6ca021dd2465852e576e304f273866f66f1a
SHA5128ae839363f1503bb7aa2570646694cea3e5261d226c78b44b33b37038be26a985b67e69cec73785ea7416232fdf967e51dce2a07d8eceacfe4fda7caadeed3c4
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Filesize
2KB
MD5a69559718ab506675e907fe49deb71e9
SHA1bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA2562f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
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Filesize
659KB
MD534a3efb47055787f7a4537fb08fb93ec
SHA17396195a1bc60f31bb90b5c8abf4b4ce95ec06f9
SHA256fe0505386751f6c7a49d4b3594cc99c8936a9906e49c595934e586f0b9a9e409
SHA512055b18c604aa583f0150f39e564438e15cd07dff308212a2c508978e2347224e2c7979f5066fb4f4e9073d5a76ee845d659214cd5f8669ce808e74d0078520ff
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Filesize
659KB
MD534a3efb47055787f7a4537fb08fb93ec
SHA17396195a1bc60f31bb90b5c8abf4b4ce95ec06f9
SHA256fe0505386751f6c7a49d4b3594cc99c8936a9906e49c595934e586f0b9a9e409
SHA512055b18c604aa583f0150f39e564438e15cd07dff308212a2c508978e2347224e2c7979f5066fb4f4e9073d5a76ee845d659214cd5f8669ce808e74d0078520ff
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c