Analysis
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max time kernel
123s -
max time network
127s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
20/11/2022, 17:16
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
8f58bb6cf7d34065ff94b0cf753e1468
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SHA1
059d62800be4e28fb69ce3596abc6185a614b08f
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SHA256
dfd66e899ba988c225592e74dc76574e6ff4a2f242e40be1876d21b282811969
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SHA512
c5639dccd0670efbea2ad2fbe46d1084b884d791f3044e9766595535b32aa915bf9673d981b33c53bdd9173e1d68a6e31ed739a5644acdc7e980ee192edca786
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SSDEEP
49152:q2DBW/NlJKOJcDjMqSCqp6NXJnWGoVkyOswdUdhjRhqU4UxVkBaFwnm:rDB6PJXCqp6N1Wb+daH4UxVkB04m
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 1756 is-D2TKF.tmp 4548 gusearcher85.exe 220 uyRPEd.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 gusearcher85.exe -
Loads dropped DLL 1 IoCs
pid Process 1756 is-D2TKF.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\is-E1B19.tmp is-D2TKF.tmp File created C:\Program Files (x86)\guSearcher\is-4LCB1.tmp is-D2TKF.tmp File opened for modification C:\Program Files (x86)\guSearcher\unins000.dat is-D2TKF.tmp File created C:\Program Files (x86)\guSearcher\unins000.dat is-D2TKF.tmp File created C:\Program Files (x86)\guSearcher\is-GCP7D.tmp is-D2TKF.tmp File created C:\Program Files (x86)\guSearcher\is-OQSAS.tmp is-D2TKF.tmp File created C:\Program Files (x86)\guSearcher\is-BVRL1.tmp is-D2TKF.tmp File created C:\Program Files (x86)\guSearcher\is-7RC9A.tmp is-D2TKF.tmp File created C:\Program Files (x86)\guSearcher\is-VLII1.tmp is-D2TKF.tmp File opened for modification C:\Program Files (x86)\guSearcher\gusearcher85.exe is-D2TKF.tmp File created C:\Program Files (x86)\guSearcher\is-O22OP.tmp is-D2TKF.tmp File created C:\Program Files (x86)\guSearcher\is-C116Q.tmp is-D2TKF.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 4600 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 4548 gusearcher85.exe 4548 gusearcher85.exe 4548 gusearcher85.exe 4548 gusearcher85.exe 4548 gusearcher85.exe 4548 gusearcher85.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 4600 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 3256 wrote to memory of 1756 3256 file.exe 81 PID 3256 wrote to memory of 1756 3256 file.exe 81 PID 3256 wrote to memory of 1756 3256 file.exe 81 PID 1756 wrote to memory of 4548 1756 is-D2TKF.tmp 82 PID 1756 wrote to memory of 4548 1756 is-D2TKF.tmp 82 PID 1756 wrote to memory of 4548 1756 is-D2TKF.tmp 82 PID 4548 wrote to memory of 220 4548 gusearcher85.exe 85 PID 4548 wrote to memory of 220 4548 gusearcher85.exe 85 PID 4548 wrote to memory of 220 4548 gusearcher85.exe 85 PID 4548 wrote to memory of 2568 4548 gusearcher85.exe 91 PID 4548 wrote to memory of 2568 4548 gusearcher85.exe 91 PID 4548 wrote to memory of 2568 4548 gusearcher85.exe 91 PID 2568 wrote to memory of 4600 2568 cmd.exe 93 PID 2568 wrote to memory of 4600 2568 cmd.exe 93 PID 2568 wrote to memory of 4600 2568 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:3256 -
C:\Users\Admin\AppData\Local\Temp\is-9HCAV.tmp\is-D2TKF.tmp"C:\Users\Admin\AppData\Local\Temp\is-9HCAV.tmp\is-D2TKF.tmp" /SL4 $10006C "C:\Users\Admin\AppData\Local\Temp\file.exe" 2244122 3184642⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:1756 -
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:4548 -
C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\uyRPEd.exe4⤵
- Executes dropped EXE
PID:220
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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:2568 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "gusearcher85.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4600
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.2MB
MD5673b289004ab7d5b7f7ac126fee0aabb
SHA1d9b5c06a658469a95c4e57b33a067bfee58fdbea
SHA25600a515c5ca706a129322d2272447321b0de14614d832ae66858048c6a55b799a
SHA512766f052139897dd9fde102c777b3ecc23289d73e978af53601454dfc134fc3f8ad31248a327997f4ebf540f24d85aaba6ff3f9e498755a498fd63617fa233555
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Filesize
3.2MB
MD5673b289004ab7d5b7f7ac126fee0aabb
SHA1d9b5c06a658469a95c4e57b33a067bfee58fdbea
SHA25600a515c5ca706a129322d2272447321b0de14614d832ae66858048c6a55b799a
SHA512766f052139897dd9fde102c777b3ecc23289d73e978af53601454dfc134fc3f8ad31248a327997f4ebf540f24d85aaba6ff3f9e498755a498fd63617fa233555
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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