Analysis
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max time kernel
53s -
max time network
137s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
02-11-2022 19:35
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20220812-en
General
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Target
file.exe
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Size
2.5MB
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MD5
a530d5d39b6ce0d2482976be86658ee7
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SHA1
bc479b3e87ceeb82299d0aa96adaf897d886e201
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SHA256
bbf64d0a989e32b724b7eb4c43fbb037ebd2ed8b04aef5a3516b61e87de379fb
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SHA512
45d23a559402eadeaf0013fc10890ffc65a06752252a5d59995405928b4faa9a23099a8771332fccb8ac211e6be01507acd035a7a2451dd4b92b6c63e65762e5
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SSDEEP
49152:Z2aFCDWL7WvD1jRySgK1LLhnfUvDCqdstyKpQD0lZl1BtPR4FBnDyA5hq:McCD7vD1dgWZ4ReyKH1rROBtDq
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 4740 is-NJSHU.tmp 4380 flsearcher67.exe 1388 o6xHFyI2Z0EZ.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 flsearcher67.exe -
Loads dropped DLL 1 IoCs
pid Process 4740 is-NJSHU.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)\flSearcher\unins000.dat is-NJSHU.tmp File created C:\Program Files (x86)\flSearcher\is-6OP3U.tmp is-NJSHU.tmp File created C:\Program Files (x86)\flSearcher\is-79P3C.tmp is-NJSHU.tmp File created C:\Program Files (x86)\flSearcher\is-FB7EM.tmp is-NJSHU.tmp File opened for modification C:\Program Files (x86)\flSearcher\unins000.dat is-NJSHU.tmp File opened for modification C:\Program Files (x86)\flSearcher\flsearcher67.exe is-NJSHU.tmp File created C:\Program Files (x86)\flSearcher\is-0NJ6P.tmp is-NJSHU.tmp File created C:\Program Files (x86)\flSearcher\is-GU6BJ.tmp is-NJSHU.tmp File created C:\Program Files (x86)\flSearcher\is-41RIU.tmp is-NJSHU.tmp File created C:\Program Files (x86)\flSearcher\is-7MLM4.tmp is-NJSHU.tmp File created C:\Program Files (x86)\flSearcher\is-MNP0Q.tmp is-NJSHU.tmp File created C:\Program Files (x86)\flSearcher\is-P9AS8.tmp is-NJSHU.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 424 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 4380 flsearcher67.exe 4380 flsearcher67.exe 4380 flsearcher67.exe 4380 flsearcher67.exe 4380 flsearcher67.exe 4380 flsearcher67.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 424 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 4248 wrote to memory of 4740 4248 file.exe 80 PID 4248 wrote to memory of 4740 4248 file.exe 80 PID 4248 wrote to memory of 4740 4248 file.exe 80 PID 4740 wrote to memory of 4380 4740 is-NJSHU.tmp 81 PID 4740 wrote to memory of 4380 4740 is-NJSHU.tmp 81 PID 4740 wrote to memory of 4380 4740 is-NJSHU.tmp 81 PID 4380 wrote to memory of 1388 4380 flsearcher67.exe 82 PID 4380 wrote to memory of 1388 4380 flsearcher67.exe 82 PID 4380 wrote to memory of 1388 4380 flsearcher67.exe 82 PID 4380 wrote to memory of 4264 4380 flsearcher67.exe 90 PID 4380 wrote to memory of 4264 4380 flsearcher67.exe 90 PID 4380 wrote to memory of 4264 4380 flsearcher67.exe 90 PID 4264 wrote to memory of 424 4264 cmd.exe 92 PID 4264 wrote to memory of 424 4264 cmd.exe 92 PID 4264 wrote to memory of 424 4264 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:4248 -
C:\Users\Admin\AppData\Local\Temp\is-02DKM.tmp\is-NJSHU.tmp"C:\Users\Admin\AppData\Local\Temp\is-02DKM.tmp\is-NJSHU.tmp" /SL4 $D01C0 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2393289 527362⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:4740 -
C:\Program Files (x86)\flSearcher\flsearcher67.exe"C:\Program Files (x86)\flSearcher\flsearcher67.exe"3⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4380 -
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\o6xHFyI2Z0EZ.exe
- Executes dropped EXE
PID:1388
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "flsearcher67.exe" /f & erase "C:\Program Files (x86)\flSearcher\flsearcher67.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
PID:4264 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "flsearcher67.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:424
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
3.6MB
MD5f7ddc89c06ad8ce8fcb45853427b1f33
SHA1e35ad6f1cbd75ae36099ef24901961e25fc868e3
SHA2561a9790b4dd71b912bfa220049bbca0399f483374ba9d1ef1e92d410a49f9d2a8
SHA512a2a1f750e2a959883f251280b3c862f4664cec726088b73912d20ad2f62206357af622c83a2a1088d3a50d112040919ac52e4a6e7021ee89ecb7d175d9a965ef
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Filesize
3.6MB
MD5f7ddc89c06ad8ce8fcb45853427b1f33
SHA1e35ad6f1cbd75ae36099ef24901961e25fc868e3
SHA2561a9790b4dd71b912bfa220049bbca0399f483374ba9d1ef1e92d410a49f9d2a8
SHA512a2a1f750e2a959883f251280b3c862f4664cec726088b73912d20ad2f62206357af622c83a2a1088d3a50d112040919ac52e4a6e7021ee89ecb7d175d9a965ef
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Filesize
657KB
MD57cd12c54a9751ca6eee6ab0c85fb68f5
SHA176562e9b7888b6d20d67addb5a90b68b54a51987
SHA256e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f
SHA51227ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc
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Filesize
657KB
MD57cd12c54a9751ca6eee6ab0c85fb68f5
SHA176562e9b7888b6d20d67addb5a90b68b54a51987
SHA256e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f
SHA51227ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc
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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