Analysis
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max time kernel
140s -
max time network
139s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system -
submitted
20/11/2022, 18:18
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
2.4MB
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MD5
db4215d7a3d2a4f3b54b9b3000cb427a
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SHA1
ff391addbbe3dd1a500ad2952e4f9efa1253491c
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SHA256
430d629d8fbd8d716f6d23bfd081da8d6844a131b05a0c5d377916dc03524025
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SHA512
2ba973c3199d65fec9410237eeabfaca9d93e8e4b17e4f5f6f7d272b201b70780e58e66b4b7cff327ccddb940b91f9129d49ddd69da73394b8597880e6ac558c
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SSDEEP
49152:q2NUJWWcWwAHXUy+D+88QRLCYChKDBGZQB7qnwpCPTUxVkBaFwnm:rNUJWveHkt+c0WGZQRiwMLUxVkB04m
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 4936 is-4MJD8.tmp 4924 gusearcher85.exe 3408 sc1kN.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-1-5-21-4060001867-1434967833-2212371794-1000\Control Panel\International\Geo\Nation gusearcher85.exe -
Loads dropped DLL 1 IoCs
pid Process 4936 is-4MJD8.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)\guSearcher\unins000.dat is-4MJD8.tmp File created C:\Program Files (x86)\guSearcher\is-HGJH5.tmp is-4MJD8.tmp File created C:\Program Files (x86)\guSearcher\is-B3QP1.tmp is-4MJD8.tmp File created C:\Program Files (x86)\guSearcher\is-EEMPP.tmp is-4MJD8.tmp File created C:\Program Files (x86)\guSearcher\is-L82OS.tmp is-4MJD8.tmp File created C:\Program Files (x86)\guSearcher\is-KP5SJ.tmp is-4MJD8.tmp File created C:\Program Files (x86)\guSearcher\is-PQ1OE.tmp is-4MJD8.tmp File created C:\Program Files (x86)\guSearcher\is-18IHU.tmp is-4MJD8.tmp File created C:\Program Files (x86)\guSearcher\is-5Q9OM.tmp is-4MJD8.tmp File opened for modification C:\Program Files (x86)\guSearcher\unins000.dat is-4MJD8.tmp File opened for modification C:\Program Files (x86)\guSearcher\gusearcher85.exe is-4MJD8.tmp File created C:\Program Files (x86)\guSearcher\is-3AV2T.tmp is-4MJD8.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 1968 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 4924 gusearcher85.exe 4924 gusearcher85.exe 4924 gusearcher85.exe 4924 gusearcher85.exe 4924 gusearcher85.exe 4924 gusearcher85.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1968 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 2192 wrote to memory of 4936 2192 file.exe 83 PID 2192 wrote to memory of 4936 2192 file.exe 83 PID 2192 wrote to memory of 4936 2192 file.exe 83 PID 4936 wrote to memory of 4924 4936 is-4MJD8.tmp 84 PID 4936 wrote to memory of 4924 4936 is-4MJD8.tmp 84 PID 4936 wrote to memory of 4924 4936 is-4MJD8.tmp 84 PID 4924 wrote to memory of 3408 4924 gusearcher85.exe 88 PID 4924 wrote to memory of 3408 4924 gusearcher85.exe 88 PID 4924 wrote to memory of 3408 4924 gusearcher85.exe 88 PID 4924 wrote to memory of 1268 4924 gusearcher85.exe 96 PID 4924 wrote to memory of 1268 4924 gusearcher85.exe 96 PID 4924 wrote to memory of 1268 4924 gusearcher85.exe 96 PID 1268 wrote to memory of 1968 1268 cmd.exe 98 PID 1268 wrote to memory of 1968 1268 cmd.exe 98 PID 1268 wrote to memory of 1968 1268 cmd.exe 98
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:2192 -
C:\Users\Admin\AppData\Local\Temp\is-498FD.tmp\is-4MJD8.tmp"C:\Users\Admin\AppData\Local\Temp\is-498FD.tmp\is-4MJD8.tmp" /SL4 $90064 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2254408 3184642⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:4936 -
C:\Program Files (x86)\guSearcher\gusearcher85.exe"C:\Program Files (x86)\guSearcher\gusearcher85.exe"3⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4924 -
C:\Users\Admin\AppData\Roaming\{6fe6a3c0-6208-11ed-b8c9-806e6f6e6963}\sc1kN.exe4⤵
- Executes dropped EXE
PID:3408
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "gusearcher85.exe" /f & erase "C:\Program Files (x86)\guSearcher\gusearcher85.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
PID:1268 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "gusearcher85.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1968
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.2MB
MD5352615223aa0e14658a812ed4df3d6ab
SHA1971c2ab164de6b88a89f60b8f4943764224d5ad2
SHA256271ba208c1739ba6a10849de9577c1260b7eebcc68372afa0d7f0e44b5ccf57a
SHA512839a2eed55022577864cc16905aa0208869b25d40edee5cb4bc6acf97003099294871a4313f29704d2aee2a65b48afcd0888a9138b9dcabcf7a7e5fe6680e771
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Filesize
3.2MB
MD5352615223aa0e14658a812ed4df3d6ab
SHA1971c2ab164de6b88a89f60b8f4943764224d5ad2
SHA256271ba208c1739ba6a10849de9577c1260b7eebcc68372afa0d7f0e44b5ccf57a
SHA512839a2eed55022577864cc16905aa0208869b25d40edee5cb4bc6acf97003099294871a4313f29704d2aee2a65b48afcd0888a9138b9dcabcf7a7e5fe6680e771
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Filesize
917KB
MD5f4d82ac5ccb900eb1ced5e8b69fac0c7
SHA1b43f8fa853706d5732c4d77b7a509977ebe78ea3
SHA256a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff
SHA51226fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c
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Filesize
917KB
MD5f4d82ac5ccb900eb1ced5e8b69fac0c7
SHA1b43f8fa853706d5732c4d77b7a509977ebe78ea3
SHA256a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff
SHA51226fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c
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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