gcleaner | 1596cc687e18fc7c926fbeb8ffffed792a231b3e357d31e165aceffdc48145e2

Analysis

max time kernel
129s
max time network
132s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
22/01/2023, 08:32

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General

Target
file.exe
Size 2.0MB
Sample230122-kfahcaff65
SHA256 1596cc687e18fc7c926fbeb8ffffed792a231b3e357d31e165aceffdc48145e2
MD5 55c14a647010ad27d10db69ebf36f861
SHA1 f2606887d651a33222d6adc50e35d1681a382a62
SHA512 914e1d0fed79b8d67c9dacf732a14a78ae2368573b18349f05bb0879cbd725b22352ee88dab0fa5f23e437ecf0b6770064c649d3c05f358f1cb330b31589777d
SSDEEP 24576:k3LiRtv/rOFQldqMuLg8w5WkRFderv3ynIMj3z58bzTw85VU/DWCVlekqC6ydwWd:kbNg0MuLZw5ByrPyn7/uo8eKuek76yd/
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

gcleaner discovery loader

Malware Config

Extracted

Family

gcleaner

45.12.253.56
45.12.253.72
45.12.253.98
45.12.253.75

Signatures

GCleaner
GCleaner is a Pay-Per-Install malware loader first discovered in early 2019.
loader gcleaner

Executes dropped EXE 3 IoCs

pid	Process
2264	file.tmp
2424	finalrecovery.exe
1656	IbH8nTtx8x.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	finalrecovery.exe

Loads dropped DLL 1 IoCs

pid	Process
2264	file.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\FexsoftFR\FinalRecovery\is-7K8ES.tmp	file.tmp
File created	C:\Program Files (x86)\FexsoftFR\FinalRecovery\is-F3UJ9.tmp	file.tmp
File created	C:\Program Files (x86)\FexsoftFR\FinalRecovery\is-6M2LJ.tmp	file.tmp
File created	C:\Program Files (x86)\FexsoftFR\FinalRecovery\data\is-SN9UB.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\FexsoftFR\FinalRecovery\finalrecovery.exe	file.tmp
File created	C:\Program Files (x86)\FexsoftFR\FinalRecovery\is-GVB05.tmp	file.tmp
File created	C:\Program Files (x86)\FexsoftFR\FinalRecovery\is-GB748.tmp	file.tmp
File created	C:\Program Files (x86)\FexsoftFR\FinalRecovery\unins000.dat	file.tmp
File opened for modification	C:\Program Files (x86)\FexsoftFR\FinalRecovery\unins000.dat	file.tmp

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
4552	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2424	finalrecovery.exe
2424	finalrecovery.exe
2424	finalrecovery.exe
2424	finalrecovery.exe
2424	finalrecovery.exe
2424	finalrecovery.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4552	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4056 wrote to memory of 2264	4056	file.exe	79
PID 4056 wrote to memory of 2264	4056	file.exe	79
PID 4056 wrote to memory of 2264	4056	file.exe	79
PID 2264 wrote to memory of 2424	2264	file.tmp	80
PID 2264 wrote to memory of 2424	2264	file.tmp	80
PID 2264 wrote to memory of 2424	2264	file.tmp	80
PID 2424 wrote to memory of 1656	2424	finalrecovery.exe	81
PID 2424 wrote to memory of 1656	2424	finalrecovery.exe	81
PID 2424 wrote to memory of 1656	2424	finalrecovery.exe	81
PID 2424 wrote to memory of 2828	2424	finalrecovery.exe	83
PID 2424 wrote to memory of 2828	2424	finalrecovery.exe	83
PID 2424 wrote to memory of 2828	2424	finalrecovery.exe	83
PID 2828 wrote to memory of 4552	2828	cmd.exe	85
PID 2828 wrote to memory of 4552	2828	cmd.exe	85
PID 2828 wrote to memory of 4552	2828	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4056
- C:\Users\Admin\AppData\Local\Temp\is-4URTC.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-4URTC.tmp\file.tmp" /SL5="$B0052,1764554,211456,C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:2264
- - C:\Program Files (x86)\FexsoftFR\FinalRecovery\finalrecovery.exe
    "C:\Program Files (x86)\FexsoftFR\FinalRecovery\finalrecovery.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:2424
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\IbH8nTtx8x.exe
      4⤵
      Executes dropped EXE
      PID:1656
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "finalrecovery.exe" /f & erase "C:\Program Files (x86)\FexsoftFR\FinalRecovery\finalrecovery.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2828
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "finalrecovery.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4552

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

finalrecovery.exe

Path C:\Program Files (x86)\FexsoftFR\FinalRecovery\finalrecovery.exe
Size 1.5MB
SHA256 a1126c2f48266e4933c3d1d81173d2fee8ee4685da30ca4ba459f206e373d054
MD5 2db5152303d0d8ab9330e68c9480b211
SHA1 f94f6216c0727e9d82c9a03cb2c052cdbc4581bc
SHA512 bc85fbb3c203e762a0765291599efa9795e3209885827ded78c43ba01be58b1a0d71d13eb908d82295207c2a0ec73ca87ce4468536593f3890c54901bf0aea9c
SSDEEP 24576:VD5K1STu31G/GEyczHKoKaIvufnXpm/G0ig3Ct1geOkrxSJ/3oXD0LZZQ9D08u:1soRhKoK98aG0FqYJPoyU9D7u
MD5 SHA1 SHA512 SSDEEP

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finalrecovery.exe

Path C:\Program Files (x86)\FexsoftFR\FinalRecovery\finalrecovery.exe
Size 1.5MB
SHA256 a1126c2f48266e4933c3d1d81173d2fee8ee4685da30ca4ba459f206e373d054
MD5 2db5152303d0d8ab9330e68c9480b211
SHA1 f94f6216c0727e9d82c9a03cb2c052cdbc4581bc
SHA512 bc85fbb3c203e762a0765291599efa9795e3209885827ded78c43ba01be58b1a0d71d13eb908d82295207c2a0ec73ca87ce4468536593f3890c54901bf0aea9c
SSDEEP 24576:VD5K1STu31G/GEyczHKoKaIvufnXpm/G0ig3Ct1geOkrxSJ/3oXD0LZZQ9D08u:1soRhKoK98aG0FqYJPoyU9D7u
MD5 SHA1 SHA512 SSDEEP

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file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-4URTC.tmp\file.tmp
Size 849KB
SHA256 ae9de9f9dbe29fe0996d144850b768c31a132d96da041d2ee0b7009675ec5af0
MD5 779b6034396cfd96041149db13d92b42
SHA1 50611e4249ee9647d5840931f06960bf0ef20ec5
SHA512 33d04621bf43a56db68c5f937548d653290c91120c7ec61babeca4efd20b92a22d2c75423ffc001e91f9e04b544743e2d35412cf7a5f93fea1857a29fe1a6d01
SSDEEP 24576:8tCUA4arPEn37TzH7A6nw9yzeESUFWHc73itXEx9R/:8kdrP837TzH7A6nV7FMcjRT
MD5 SHA1 SHA512 SSDEEP

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file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-4URTC.tmp\file.tmp
Size 849KB
SHA256 ae9de9f9dbe29fe0996d144850b768c31a132d96da041d2ee0b7009675ec5af0
MD5 779b6034396cfd96041149db13d92b42
SHA1 50611e4249ee9647d5840931f06960bf0ef20ec5
SHA512 33d04621bf43a56db68c5f937548d653290c91120c7ec61babeca4efd20b92a22d2c75423ffc001e91f9e04b544743e2d35412cf7a5f93fea1857a29fe1a6d01
SSDEEP 24576:8tCUA4arPEn37TzH7A6nw9yzeESUFWHc73itXEx9R/:8kdrP837TzH7A6nV7FMcjRT
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-6AIM0.tmp\_isetup\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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IbH8nTtx8x.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\IbH8nTtx8x.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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IbH8nTtx8x.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\IbH8nTtx8x.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/2424-143-0x0000000000400000-0x000000000137C000-memory.dmp

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memory/2424-142-0x0000000000400000-0x000000000137C000-memory.dmp

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memory/2424-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2424-151-0x0000000000400000-0x000000000137C000-memory.dmp

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memory/2424-154-0x0000000000400000-0x000000000137C000-memory.dmp

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memory/4056-132-0x0000000000400000-0x000000000043B000-memory.dmp

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memory/4056-134-0x0000000000400000-0x000000000043B000-memory.dmp

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memory/4056-150-0x0000000000400000-0x000000000043B000-memory.dmp

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memory/4056-155-0x0000000000400000-0x000000000043B000-memory.dmp

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