Analysis
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max time kernel
150s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
18/11/2022, 19:46
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
76e6398ba3b32aec23382b84549ebac1
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SHA1
0ac182bd20da1c90a55045fa969e5ffcaef338b8
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SHA256
09dbb7bf9e466e0dc11dc6a3f131229b51e929f882fb7dad98781f5074ac9b53
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SHA512
7799ead30b632c49d4b409ded8fc485241cc0301a030afa14c9d0f3781c062806e8af5ed22cedd5c6d6bcd5264a40a86e8ebd2edde6b2e968eaaa3c4bb62a309
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SSDEEP
49152:q2/lDSqaXcjUpA8v1S81lQOitolaJbjiPy1yHfRx7Pq2:r/l8M4q8dS8rQO2olQi5PD
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 364 is-B1F4V.tmp 1556 grsearcher83.exe 380 F7Br2mlG.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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation grsearcher83.exe -
Loads dropped DLL 1 IoCs
pid Process 364 is-B1F4V.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 opened for modification C:\Program Files (x86)\grSearcher\unins000.dat is-B1F4V.tmp File created C:\Program Files (x86)\grSearcher\unins000.dat is-B1F4V.tmp File created C:\Program Files (x86)\grSearcher\is-D1QM0.tmp is-B1F4V.tmp File created C:\Program Files (x86)\grSearcher\is-OV5M4.tmp is-B1F4V.tmp File created C:\Program Files (x86)\grSearcher\is-6HVR1.tmp is-B1F4V.tmp File created C:\Program Files (x86)\grSearcher\is-LQI1I.tmp is-B1F4V.tmp File opened for modification C:\Program Files (x86)\grSearcher\grsearcher83.exe is-B1F4V.tmp File created C:\Program Files (x86)\grSearcher\is-O1632.tmp is-B1F4V.tmp File created C:\Program Files (x86)\grSearcher\is-PJENT.tmp is-B1F4V.tmp File created C:\Program Files (x86)\grSearcher\is-DUSHN.tmp is-B1F4V.tmp File created C:\Program Files (x86)\grSearcher\is-TGP43.tmp is-B1F4V.tmp File created C:\Program Files (x86)\grSearcher\is-UE0VI.tmp is-B1F4V.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 1400 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 1556 grsearcher83.exe 1556 grsearcher83.exe 1556 grsearcher83.exe 1556 grsearcher83.exe 1556 grsearcher83.exe 1556 grsearcher83.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 1556 grsearcher83.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1400 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 2280 wrote to memory of 364 2280 file.exe 80 PID 2280 wrote to memory of 364 2280 file.exe 80 PID 2280 wrote to memory of 364 2280 file.exe 80 PID 364 wrote to memory of 1556 364 is-B1F4V.tmp 81 PID 364 wrote to memory of 1556 364 is-B1F4V.tmp 81 PID 364 wrote to memory of 1556 364 is-B1F4V.tmp 81 PID 1556 wrote to memory of 380 1556 grsearcher83.exe 82 PID 1556 wrote to memory of 380 1556 grsearcher83.exe 82 PID 1556 wrote to memory of 380 1556 grsearcher83.exe 82 PID 1556 wrote to memory of 3920 1556 grsearcher83.exe 90 PID 1556 wrote to memory of 3920 1556 grsearcher83.exe 90 PID 1556 wrote to memory of 3920 1556 grsearcher83.exe 90 PID 3920 wrote to memory of 1400 3920 cmd.exe 92 PID 3920 wrote to memory of 1400 3920 cmd.exe 92 PID 3920 wrote to memory of 1400 3920 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:2280 -
C:\Users\Admin\AppData\Local\Temp\is-SJOQT.tmp\is-B1F4V.tmp"C:\Users\Admin\AppData\Local\Temp\is-SJOQT.tmp\is-B1F4V.tmp" /SL4 $9002C "C:\Users\Admin\AppData\Local\Temp\file.exe" 1805807 547842⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:364 -
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 behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:1556 -
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\F7Br2mlG.exe4⤵
- Executes dropped EXE
PID:380
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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:3920 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "grsearcher83.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1400
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
2.8MB
MD5a8670e96e39a0d118933de2bdce8d712
SHA179614830a863d80111ed887a3442156d6409ff9f
SHA2567ef8759d8babbeaf9ffe826d78fa2d55e1059d3e648355f7d31928729710ad8f
SHA512e2b7ab8adbf17779274068114b7736fa9d9808cfef67b2c4216a50a305257a88b43c300a83ead7f8223a214bae48f53cfaa9de019271d96ffae3cf48c89c268b
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Filesize
2.8MB
MD5a8670e96e39a0d118933de2bdce8d712
SHA179614830a863d80111ed887a3442156d6409ff9f
SHA2567ef8759d8babbeaf9ffe826d78fa2d55e1059d3e648355f7d31928729710ad8f
SHA512e2b7ab8adbf17779274068114b7736fa9d9808cfef67b2c4216a50a305257a88b43c300a83ead7f8223a214bae48f53cfaa9de019271d96ffae3cf48c89c268b
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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