Analysis
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max time kernel
91s -
max time network
137s -
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, 18:02
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
38e5cfbd2dbd01e6e3ce5c39f40874f0
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SHA1
ab8f5a7c581bacf4b313470308af6205413fa932
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SHA256
2990f80a55d9a87edd9e5a4827456bdfa78ba7bb822a4c183713db444bbe187f
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SHA512
30dac64926fccd8bdc90470d9270d1c18e2dabbb5893ea1a9e4a6727b008c2c50be766497b6f659e053bed8fb83aa282a619a930aba1dc3683735c406fe45889
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SSDEEP
49152:q2ww1BwrLgDRXN/UM/R1A8iV3fnKCm3HAFrbEggyHfRx7Pq2:rR1BwGNvR1hVHebPBPD
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 4912 is-4R189.tmp 1284 grsearcher83.exe 3264 q8MAB39GWbz.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 4912 is-4R189.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\unins000.dat is-4R189.tmp File created C:\Program Files (x86)\grSearcher\is-34KIP.tmp is-4R189.tmp File created C:\Program Files (x86)\grSearcher\is-I871I.tmp is-4R189.tmp File created C:\Program Files (x86)\grSearcher\is-OHKT7.tmp is-4R189.tmp File created C:\Program Files (x86)\grSearcher\is-TLPF2.tmp is-4R189.tmp File opened for modification C:\Program Files (x86)\grSearcher\unins000.dat is-4R189.tmp File opened for modification C:\Program Files (x86)\grSearcher\grsearcher83.exe is-4R189.tmp File created C:\Program Files (x86)\grSearcher\is-HL1C6.tmp is-4R189.tmp File created C:\Program Files (x86)\grSearcher\is-PCK92.tmp is-4R189.tmp File created C:\Program Files (x86)\grSearcher\is-8Q02Q.tmp is-4R189.tmp File created C:\Program Files (x86)\grSearcher\is-HTR6F.tmp is-4R189.tmp File created C:\Program Files (x86)\grSearcher\is-LMIT8.tmp is-4R189.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 1272 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 1284 grsearcher83.exe 1284 grsearcher83.exe 1284 grsearcher83.exe 1284 grsearcher83.exe 1284 grsearcher83.exe 1284 grsearcher83.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1272 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 4960 wrote to memory of 4912 4960 file.exe 80 PID 4960 wrote to memory of 4912 4960 file.exe 80 PID 4960 wrote to memory of 4912 4960 file.exe 80 PID 4912 wrote to memory of 1284 4912 is-4R189.tmp 81 PID 4912 wrote to memory of 1284 4912 is-4R189.tmp 81 PID 4912 wrote to memory of 1284 4912 is-4R189.tmp 81 PID 1284 wrote to memory of 3264 1284 grsearcher83.exe 82 PID 1284 wrote to memory of 3264 1284 grsearcher83.exe 82 PID 1284 wrote to memory of 3264 1284 grsearcher83.exe 82 PID 1284 wrote to memory of 3312 1284 grsearcher83.exe 90 PID 1284 wrote to memory of 3312 1284 grsearcher83.exe 90 PID 1284 wrote to memory of 3312 1284 grsearcher83.exe 90 PID 3312 wrote to memory of 1272 3312 cmd.exe 92 PID 3312 wrote to memory of 1272 3312 cmd.exe 92 PID 3312 wrote to memory of 1272 3312 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:4960 -
C:\Users\Admin\AppData\Local\Temp\is-OE9AK.tmp\is-4R189.tmp"C:\Users\Admin\AppData\Local\Temp\is-OE9AK.tmp\is-4R189.tmp" /SL4 $90046 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1801344 547842⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:4912 -
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:1284 -
C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\q8MAB39GWbz.exe4⤵
- Executes dropped EXE
PID:3264
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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:3312 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "grsearcher83.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1272
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
2.8MB
MD5378e202e968ac4dfff0295ce505be87b
SHA100a3acc35080fea59d5204b79f481ea43849edd9
SHA256cf5527d97c5082551c5a4a9db601c28581f5a74a94167185b48a5164cae4d692
SHA512537945e615e478f414117e51ce925b5a7dfc8f8c56eaee8d00c624dbc4db1956bbb70ae4ee759f4fd1051d4c303304d46687f60f7d32c039261017e165576f1b
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Filesize
2.8MB
MD5378e202e968ac4dfff0295ce505be87b
SHA100a3acc35080fea59d5204b79f481ea43849edd9
SHA256cf5527d97c5082551c5a4a9db601c28581f5a74a94167185b48a5164cae4d692
SHA512537945e615e478f414117e51ce925b5a7dfc8f8c56eaee8d00c624dbc4db1956bbb70ae4ee759f4fd1051d4c303304d46687f60f7d32c039261017e165576f1b
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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