gcleaner | 78cd3181da9c97fa0d5e7e9e343a941701d42569c88b370f0200d78321124b63

Analysis

max time kernel
106s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
22/01/2023, 12:31

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General

Target
file.exe
Size 1.9MB
Sample230122-pp2emshg6x
SHA256 78cd3181da9c97fa0d5e7e9e343a941701d42569c88b370f0200d78321124b63
MD5 5ba2535a523873059988088cf1941d7c
SHA1 f532e0014cd969fc77e8d7b94b9ec949fedae855
SHA512 06de0f5d3a16224f42251b00e405cfcf21956bd07b42823926251bdbb88590af72f0d710edd6750e795813eeb7f37011bf7386fa616299592987ea855e8b6e2c
SSDEEP 49152:kbm/J7SIeAiok/doZRvE5tz4f/KJ8dHZEk:8mppkokFoXctEaJ8dv
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
1736	file.tmp
3800	finalrecovery.exe
2020	loBVUmSI7i1zbL.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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	finalrecovery.exe

Loads dropped DLL 1 IoCs

pid	Process
1736	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-IKOF5.tmp	file.tmp
File created	C:\Program Files (x86)\FexsoftFR\FinalRecovery\is-C200V.tmp	file.tmp
File created	C:\Program Files (x86)\FexsoftFR\FinalRecovery\is-MA8N7.tmp	file.tmp
File created	C:\Program Files (x86)\FexsoftFR\FinalRecovery\is-S5DRP.tmp	file.tmp
File created	C:\Program Files (x86)\FexsoftFR\FinalRecovery\data\is-JF1J1.tmp	file.tmp
File created	C:\Program Files (x86)\FexsoftFR\FinalRecovery\unins000.dat	file.tmp
File created	C:\Program Files (x86)\FexsoftFR\FinalRecovery\is-LNAOP.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\FexsoftFR\FinalRecovery\unins000.dat	file.tmp
File opened for modification	C:\Program Files (x86)\FexsoftFR\FinalRecovery\finalrecovery.exe	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
4648	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3800	finalrecovery.exe
3800	finalrecovery.exe
3800	finalrecovery.exe
3800	finalrecovery.exe
3800	finalrecovery.exe
3800	finalrecovery.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4648	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1580 wrote to memory of 1736	1580	file.exe	82
PID 1580 wrote to memory of 1736	1580	file.exe	82
PID 1580 wrote to memory of 1736	1580	file.exe	82
PID 1736 wrote to memory of 3800	1736	file.tmp	83
PID 1736 wrote to memory of 3800	1736	file.tmp	83
PID 1736 wrote to memory of 3800	1736	file.tmp	83
PID 3800 wrote to memory of 2020	3800	finalrecovery.exe	86
PID 3800 wrote to memory of 2020	3800	finalrecovery.exe	86
PID 3800 wrote to memory of 2020	3800	finalrecovery.exe	86
PID 3800 wrote to memory of 3668	3800	finalrecovery.exe	92
PID 3800 wrote to memory of 3668	3800	finalrecovery.exe	92
PID 3800 wrote to memory of 3668	3800	finalrecovery.exe	92
PID 3668 wrote to memory of 4648	3668	cmd.exe	94
PID 3668 wrote to memory of 4648	3668	cmd.exe	94
PID 3668 wrote to memory of 4648	3668	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1580
- C:\Users\Admin\AppData\Local\Temp\is-5CJ77.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-5CJ77.tmp\file.tmp" /SL5="$901C2,1752617,211456,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:1736
- - 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:3800
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\loBVUmSI7i1zbL.exe
      4⤵
      Executes dropped EXE
      PID:2020
  - - 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:3668
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "finalrecovery.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4648

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 62032415c9c284cd7b0371d0e56a17af09c4a10b74b6d643177043477909d322
MD5 b040aabf622c4a2225cb670804f2e4b0
SHA1 12d5e77489e49d0a7ab83f0f677c665724513dcb
SHA512 d7083a495b4ad3311e53a15261edbc04976eda799c5acc0414db0831b6aac5272c1720aa89e06c4ab98718a782dd6daf0639139eefb0aa78ceac520d3fc48e4f
SSDEEP 24576:zCUcewgIL++4QpI9+aIvufnXpm/G0iK5TxZDnqFMlx//Nu+8:+UzIn98aG0zZCKXZ8
MD5 SHA1 SHA512 SSDEEP

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finalrecovery.exe

Path C:\Program Files (x86)\FexsoftFR\FinalRecovery\finalrecovery.exe
Size 1.5MB
SHA256 62032415c9c284cd7b0371d0e56a17af09c4a10b74b6d643177043477909d322
MD5 b040aabf622c4a2225cb670804f2e4b0
SHA1 12d5e77489e49d0a7ab83f0f677c665724513dcb
SHA512 d7083a495b4ad3311e53a15261edbc04976eda799c5acc0414db0831b6aac5272c1720aa89e06c4ab98718a782dd6daf0639139eefb0aa78ceac520d3fc48e4f
SSDEEP 24576:zCUcewgIL++4QpI9+aIvufnXpm/G0iK5TxZDnqFMlx//Nu+8:+UzIn98aG0zZCKXZ8
MD5 SHA1 SHA512 SSDEEP

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file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-5CJ77.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-5CJ77.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-D4O18.tmp\_isetup\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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loBVUmSI7i1zbL.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\loBVUmSI7i1zbL.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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loBVUmSI7i1zbL.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\loBVUmSI7i1zbL.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/1580-138-0x0000000000400000-0x000000000043B000-memory.dmp

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memory/1580-154-0x0000000000400000-0x000000000043B000-memory.dmp

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memory/1580-132-0x0000000000400000-0x000000000043B000-memory.dmp

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memory/3800-143-0x0000000000400000-0x000000000137C000-memory.dmp

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memory/3800-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/3800-150-0x0000000000400000-0x000000000137C000-memory.dmp

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memory/3800-142-0x0000000000400000-0x000000000137C000-memory.dmp

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memory/3800-153-0x0000000000400000-0x000000000137C000-memory.dmp

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