Analysis
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max time kernel
90s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
18/11/2022, 21:17
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20220901-en
General
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Target
file.exe
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Size
2.0MB
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MD5
c58a8b8046d31d2764e43b218f5d8e88
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SHA1
3a2ce27c4c56f48b3801e4eea1c83569f4e80794
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SHA256
17d5d1a251f21d63f42d012d088645054cef60fb8ebed67ec75c1fa318dd3570
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SHA512
56f7a0d3dda7a3795c1ebcb5c9550e30c9cb45d364c40dd9491c1987a0e9181acb089830746de0b9e4b13f2cc7500580f3fc07d7632f26f422b096f4f2d18098
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SSDEEP
49152:q2rpVn9bqV2/WaAha6oTXCEE7dsW70fxj0mRhk0jAyHfRx7Pq2:rd3k/aAha6USEE7dV70fxjDaahPD
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 3412 is-D1O12.tmp 1516 grsearcher83.exe 2980 buYdpxBMNFTvlm.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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation grsearcher83.exe -
Loads dropped DLL 1 IoCs
pid Process 3412 is-D1O12.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-KIP0U.tmp is-D1O12.tmp File created C:\Program Files (x86)\grSearcher\is-AF00F.tmp is-D1O12.tmp File created C:\Program Files (x86)\grSearcher\is-39TFT.tmp is-D1O12.tmp File created C:\Program Files (x86)\grSearcher\is-196QU.tmp is-D1O12.tmp File opened for modification C:\Program Files (x86)\grSearcher\grsearcher83.exe is-D1O12.tmp File opened for modification C:\Program Files (x86)\grSearcher\unins000.dat is-D1O12.tmp File created C:\Program Files (x86)\grSearcher\unins000.dat is-D1O12.tmp File created C:\Program Files (x86)\grSearcher\is-895KO.tmp is-D1O12.tmp File created C:\Program Files (x86)\grSearcher\is-9NPB5.tmp is-D1O12.tmp File created C:\Program Files (x86)\grSearcher\is-C42MA.tmp is-D1O12.tmp File created C:\Program Files (x86)\grSearcher\is-B5URM.tmp is-D1O12.tmp File created C:\Program Files (x86)\grSearcher\is-B3NJ6.tmp is-D1O12.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 4476 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 1516 grsearcher83.exe 1516 grsearcher83.exe 1516 grsearcher83.exe 1516 grsearcher83.exe 1516 grsearcher83.exe 1516 grsearcher83.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 4476 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 4348 wrote to memory of 3412 4348 file.exe 84 PID 4348 wrote to memory of 3412 4348 file.exe 84 PID 4348 wrote to memory of 3412 4348 file.exe 84 PID 3412 wrote to memory of 1516 3412 is-D1O12.tmp 85 PID 3412 wrote to memory of 1516 3412 is-D1O12.tmp 85 PID 3412 wrote to memory of 1516 3412 is-D1O12.tmp 85 PID 1516 wrote to memory of 2980 1516 grsearcher83.exe 86 PID 1516 wrote to memory of 2980 1516 grsearcher83.exe 86 PID 1516 wrote to memory of 2980 1516 grsearcher83.exe 86 PID 1516 wrote to memory of 4976 1516 grsearcher83.exe 94 PID 1516 wrote to memory of 4976 1516 grsearcher83.exe 94 PID 1516 wrote to memory of 4976 1516 grsearcher83.exe 94 PID 4976 wrote to memory of 4476 4976 cmd.exe 96 PID 4976 wrote to memory of 4476 4976 cmd.exe 96 PID 4976 wrote to memory of 4476 4976 cmd.exe 96
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:4348 -
C:\Users\Admin\AppData\Local\Temp\is-O67II.tmp\is-D1O12.tmp"C:\Users\Admin\AppData\Local\Temp\is-O67II.tmp\is-D1O12.tmp" /SL4 $8006A "C:\Users\Admin\AppData\Local\Temp\file.exe" 1806416 547842⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:3412 -
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:1516 -
C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\buYdpxBMNFTvlm.exe4⤵
- Executes dropped EXE
PID:2980
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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:4976 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "grsearcher83.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4476
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
2.8MB
MD53d23a7d279cbbafd129ec79bc3592859
SHA1f5692daa3ee7a80b22015ad0a0acc2cc64a9b11c
SHA25676adc6896224a61f3bfaa1ae3edee277886138e9e24facf485426b5424708c54
SHA51267112c0be30c34c7b90d9b21af9c8bf88b04b29eeefaab3a018bdb802d29ed08e1a3700604e51cee7867b69faf8eb1de4788dfa6b4da8b2a2cbd262983febd14
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Filesize
2.8MB
MD53d23a7d279cbbafd129ec79bc3592859
SHA1f5692daa3ee7a80b22015ad0a0acc2cc64a9b11c
SHA25676adc6896224a61f3bfaa1ae3edee277886138e9e24facf485426b5424708c54
SHA51267112c0be30c34c7b90d9b21af9c8bf88b04b29eeefaab3a018bdb802d29ed08e1a3700604e51cee7867b69faf8eb1de4788dfa6b4da8b2a2cbd262983febd14
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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