gcleaner | 25d6b082ec863db33a1109e2e40ef550d1a6ad1c5d18c879ed82a4f685da03f3

Analysis

max time kernel
65s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
01/02/2023, 23:01

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General

Target
file.exe
Size 2.1MB
Sample230201-2zh29sda84
SHA256 25d6b082ec863db33a1109e2e40ef550d1a6ad1c5d18c879ed82a4f685da03f3
MD5 ab7eb7190896ca75b85e464f08d57c4e
SHA1 a2195de05c62a843df3a128bcb0bd9caad699f9b
SHA512 704a72f2212b906e822f334a8cc74628ef868fa7deaa97590e7b9740d609ec0cd2b3bd8893687b719e9b6fe19093a4424ec47e77b289cd4e67ccd4bfaef31b97
SSDEEP 49152:icPLnQfilGX/P9v+zeWHzMw1FYA4EJ/LwxVTlWpsg6viLCgv2MR:XPLnQfiA/Vv+zXTMwVvNyTMKg6vKv2MR
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
2104	file.tmp
4964	finalrecovery.exe
4680	YtzvsDcVUVj0o.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
2104	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)\FHGsoftFR\FinalRecovery\is-J1862.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\FHGsoftFR\FinalRecovery\finalrecovery.exe	file.tmp
File created	C:\Program Files (x86)\FHGsoftFR\FinalRecovery\unins000.dat	file.tmp
File created	C:\Program Files (x86)\FHGsoftFR\FinalRecovery\is-F8453.tmp	file.tmp
File created	C:\Program Files (x86)\FHGsoftFR\FinalRecovery\is-VVPVN.tmp	file.tmp
File created	C:\Program Files (x86)\FHGsoftFR\FinalRecovery\is-58SC1.tmp	file.tmp
File created	C:\Program Files (x86)\FHGsoftFR\FinalRecovery\data\is-MVB93.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\FHGsoftFR\FinalRecovery\unins000.dat	file.tmp
File created	C:\Program Files (x86)\FHGsoftFR\FinalRecovery\is-18JVR.tmp	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
3740	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4964	finalrecovery.exe
4964	finalrecovery.exe
4964	finalrecovery.exe
4964	finalrecovery.exe
4964	finalrecovery.exe
4964	finalrecovery.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3740	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4856 wrote to memory of 2104	4856	file.exe	80
PID 4856 wrote to memory of 2104	4856	file.exe	80
PID 4856 wrote to memory of 2104	4856	file.exe	80
PID 2104 wrote to memory of 4964	2104	file.tmp	81
PID 2104 wrote to memory of 4964	2104	file.tmp	81
PID 2104 wrote to memory of 4964	2104	file.tmp	81
PID 4964 wrote to memory of 4680	4964	finalrecovery.exe	82
PID 4964 wrote to memory of 4680	4964	finalrecovery.exe	82
PID 4964 wrote to memory of 4680	4964	finalrecovery.exe	82
PID 4964 wrote to memory of 3068	4964	finalrecovery.exe	87
PID 4964 wrote to memory of 3068	4964	finalrecovery.exe	87
PID 4964 wrote to memory of 3068	4964	finalrecovery.exe	87
PID 3068 wrote to memory of 3740	3068	cmd.exe	89
PID 3068 wrote to memory of 3740	3068	cmd.exe	89
PID 3068 wrote to memory of 3740	3068	cmd.exe	89

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4856
- C:\Users\Admin\AppData\Local\Temp\is-5N25Q.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-5N25Q.tmp\file.tmp" /SL5="$A005A,1979308,198656,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:2104
- - C:\Program Files (x86)\FHGsoftFR\FinalRecovery\finalrecovery.exe
    "C:\Program Files (x86)\FHGsoftFR\FinalRecovery\finalrecovery.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4964
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\YtzvsDcVUVj0o.exe
      4⤵
      Executes dropped EXE
      PID:4680
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "finalrecovery.exe" /f & erase "C:\Program Files (x86)\FHGsoftFR\FinalRecovery\finalrecovery.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3068
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "finalrecovery.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3740

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)\FHGsoftFR\FinalRecovery\finalrecovery.exe
Size 1.9MB
SHA256 6c6a182dc55e012e6d63ba272f8b5ea6ed342448103ec6cc0bf176e160d68ce6
MD5 5dd6e7d7540db0025cad2ed3b79d9345
SHA1 f76819dda85c8a41b5a5944ab3d4b10ab9bdb15d
SHA512 077642e79b4ba6e2e2c1cede58270c8a155fcf888eb322f48efcedecae2a7d2f9dbf779b8836be551c2d7081433a7a4b29a51b5971b31a6e34ae05b3aa3e7c14
SSDEEP 24576:/RHS19tjt94ncjbd+gQoixWmTTVsj7oFmxRM9M86xiKNo0h7tius2cH7T+:/RHS19x4ncjbd+gKWykx532/+
MD5 SHA1 SHA512 SSDEEP

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finalrecovery.exe

Path C:\Program Files (x86)\FHGsoftFR\FinalRecovery\finalrecovery.exe
Size 1.9MB
SHA256 6c6a182dc55e012e6d63ba272f8b5ea6ed342448103ec6cc0bf176e160d68ce6
MD5 5dd6e7d7540db0025cad2ed3b79d9345
SHA1 f76819dda85c8a41b5a5944ab3d4b10ab9bdb15d
SHA512 077642e79b4ba6e2e2c1cede58270c8a155fcf888eb322f48efcedecae2a7d2f9dbf779b8836be551c2d7081433a7a4b29a51b5971b31a6e34ae05b3aa3e7c14
SSDEEP 24576:/RHS19tjt94ncjbd+gQoixWmTTVsj7oFmxRM9M86xiKNo0h7tius2cH7T+:/RHS19x4ncjbd+gKWykx532/+
MD5 SHA1 SHA512 SSDEEP

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file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-5N25Q.tmp\file.tmp
Size 696KB
SHA256 229fbcb11ee7d1f082b6411610e95f726eec4e6737e6b6392719df4f0fe3fa1d
MD5 d76329b30db65f61d55b20f36b56da26
SHA1 5e4c77b723ae8f05b3ae6afeee735a4355f00663
SHA512 a291aed0897315e88b6378b1db10ada05bda8c1eccaf73de23f409fe61860ebd1dbb422063e00996584d3b4b100122931d5bbab54a88951706d75efcc660f70d
SSDEEP 12288:9QtLeYXPEv4arPEn37TzH7A6p3xxu9yz/eERMY1VLJrNufs9RZM2GHOQyD362kS0:+tCUA4arPEn37TzH7A6nw9yzeESUFWH/
MD5 SHA1 SHA512 SSDEEP

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file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-5N25Q.tmp\file.tmp
Size 696KB
SHA256 229fbcb11ee7d1f082b6411610e95f726eec4e6737e6b6392719df4f0fe3fa1d
MD5 d76329b30db65f61d55b20f36b56da26
SHA1 5e4c77b723ae8f05b3ae6afeee735a4355f00663
SHA512 a291aed0897315e88b6378b1db10ada05bda8c1eccaf73de23f409fe61860ebd1dbb422063e00996584d3b4b100122931d5bbab54a88951706d75efcc660f70d
SSDEEP 12288:9QtLeYXPEv4arPEn37TzH7A6p3xxu9yz/eERMY1VLJrNufs9RZM2GHOQyD362kS0:+tCUA4arPEn37TzH7A6nw9yzeESUFWH/
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-V4QS7.tmp\_isetup\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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YtzvsDcVUVj0o.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\YtzvsDcVUVj0o.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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YtzvsDcVUVj0o.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\YtzvsDcVUVj0o.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/4856-138-0x0000000000400000-0x0000000000437000-memory.dmp

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memory/4856-154-0x0000000000400000-0x0000000000437000-memory.dmp

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memory/4856-132-0x0000000000400000-0x0000000000437000-memory.dmp

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memory/4964-143-0x0000000000400000-0x00000000013E9000-memory.dmp

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memory/4964-150-0x0000000000400000-0x00000000013E9000-memory.dmp

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memory/4964-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4964-142-0x0000000000400000-0x00000000013E9000-memory.dmp

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memory/4964-153-0x0000000000400000-0x00000000013E9000-memory.dmp

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