Analysis
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max time kernel
91s -
max time network
139s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
20/11/2022, 19:31
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
2.4MB
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MD5
1a8784c9b0d8e72284205a3874ec73c2
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SHA1
90e27e17355375165ac6c803e43e55b13e172138
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SHA256
b52c7abbbb2024dcada78ac87aecd50b588ac787248e0ccd5715d3da7da187ac
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SHA512
0c364652fb0f3e585b7d78a182eaada30803bc46c362c9c878503afea39311dd64a0dbddf12a568df2b3a67a80812f604e7fce103a838061b870560c6aef0e8d
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SSDEEP
49152:q2wDCjFJlx0WQgAvas06f/DhlJY/gij50Dr8Cuwxy7LoUxVkBaFwnm:rwDCpJleWQgs1f/D3GgYJCTxyHoUxVkq
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 532 is-27LJT.tmp 4512 gusearcher85.exe 664 fk9Ms22eE8.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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation gusearcher85.exe -
Loads dropped DLL 1 IoCs
pid Process 532 is-27LJT.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-27LJT.tmp File created C:\Program Files (x86)\guSearcher\is-T9CDC.tmp is-27LJT.tmp File created C:\Program Files (x86)\guSearcher\is-VSAGF.tmp is-27LJT.tmp File created C:\Program Files (x86)\guSearcher\is-8TKK9.tmp is-27LJT.tmp File created C:\Program Files (x86)\guSearcher\is-VPP6R.tmp is-27LJT.tmp File created C:\Program Files (x86)\guSearcher\is-BECHU.tmp is-27LJT.tmp File created C:\Program Files (x86)\guSearcher\is-64IRR.tmp is-27LJT.tmp File created C:\Program Files (x86)\guSearcher\is-BLTKP.tmp is-27LJT.tmp File created C:\Program Files (x86)\guSearcher\is-C9LSL.tmp is-27LJT.tmp File created C:\Program Files (x86)\guSearcher\is-Q9HV7.tmp is-27LJT.tmp File opened for modification C:\Program Files (x86)\guSearcher\unins000.dat is-27LJT.tmp File opened for modification C:\Program Files (x86)\guSearcher\gusearcher85.exe is-27LJT.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 3912 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 4512 gusearcher85.exe 4512 gusearcher85.exe 4512 gusearcher85.exe 4512 gusearcher85.exe 4512 gusearcher85.exe 4512 gusearcher85.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 3912 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 4968 wrote to memory of 532 4968 file.exe 81 PID 4968 wrote to memory of 532 4968 file.exe 81 PID 4968 wrote to memory of 532 4968 file.exe 81 PID 532 wrote to memory of 4512 532 is-27LJT.tmp 82 PID 532 wrote to memory of 4512 532 is-27LJT.tmp 82 PID 532 wrote to memory of 4512 532 is-27LJT.tmp 82 PID 4512 wrote to memory of 664 4512 gusearcher85.exe 83 PID 4512 wrote to memory of 664 4512 gusearcher85.exe 83 PID 4512 wrote to memory of 664 4512 gusearcher85.exe 83 PID 4512 wrote to memory of 3520 4512 gusearcher85.exe 91 PID 4512 wrote to memory of 3520 4512 gusearcher85.exe 91 PID 4512 wrote to memory of 3520 4512 gusearcher85.exe 91 PID 3520 wrote to memory of 3912 3520 cmd.exe 93 PID 3520 wrote to memory of 3912 3520 cmd.exe 93 PID 3520 wrote to memory of 3912 3520 cmd.exe 93
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:4968 -
C:\Users\Admin\AppData\Local\Temp\is-KG5TU.tmp\is-27LJT.tmp"C:\Users\Admin\AppData\Local\Temp\is-KG5TU.tmp\is-27LJT.tmp" /SL4 $901CE "C:\Users\Admin\AppData\Local\Temp\file.exe" 2235783 3184642⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:532 -
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:4512 -
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\fk9Ms22eE8.exe4⤵
- Executes dropped EXE
PID:664
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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:3520 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "gusearcher85.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:3912
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.2MB
MD5f030f235b3a8097fa564e8b322619af8
SHA1f00c225bbc073159f27c58217b87debcbab5e5a8
SHA256fdaab2629023aec5939012160493afe4b4279e693bd1722c0cf8fa42481d4c24
SHA512d6ea4d0eb81a4949489a86a9dd637ce47145e79c9e6513e8506aa7dceaa96a9fea1305bd065cfa8fccd65390cfa1cdbb6028a27ad8c840eea4fa4ec090bdb060
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Filesize
3.2MB
MD5f030f235b3a8097fa564e8b322619af8
SHA1f00c225bbc073159f27c58217b87debcbab5e5a8
SHA256fdaab2629023aec5939012160493afe4b4279e693bd1722c0cf8fa42481d4c24
SHA512d6ea4d0eb81a4949489a86a9dd637ce47145e79c9e6513e8506aa7dceaa96a9fea1305bd065cfa8fccd65390cfa1cdbb6028a27ad8c840eea4fa4ec090bdb060
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Filesize
2KB
MD5a69559718ab506675e907fe49deb71e9
SHA1bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA2562f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
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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
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c