gcleaner | 5145bd5fe8c331e9e1d7af0e1fa9479dd48b8a4d22b572e441a802c87954c5f7

General

Target

file.exe
Size

2.1MB
MD5

37012625f9bff02aedb4e3079bcdf98b
SHA1

56531711897762695491659a067487b470bbf97b
SHA256

5145bd5fe8c331e9e1d7af0e1fa9479dd48b8a4d22b572e441a802c87954c5f7
SHA512

27e4067c5836d8c9487fe311cebdfa5502ab42146ecf29ce79f88a899641886354f4d9bb54f63e8526b12dff5aba2a2f7e0fe22d2425d8c6dd9f243e5e78a7e6
SSDEEP

49152:icPLnQ72Q8dEQJ71+D029FC4TawZRYTuXpf+JQ15ukLCgv2MR:XPLnQPQE4JM0aFW2mTuJ+G15Hv2MR

Score

10^/10

gcleaner discovery loader

Malware Config

Extracted

Family

gcleaner

C2

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
1640	file.tmp
1048	finalrecovery.exe
400	lUmpF.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
1640	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-1NODS.tmp	file.tmp
File created	C:\Program Files (x86)\FHGsoftFR\FinalRecovery\is-8JCC9.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\FHGsoftFR\FinalRecovery\unins000.dat	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-KMT8H.tmp	file.tmp
File created	C:\Program Files (x86)\FHGsoftFR\FinalRecovery\is-NJRB3.tmp	file.tmp
File created	C:\Program Files (x86)\FHGsoftFR\FinalRecovery\is-OQA25.tmp	file.tmp
File created	C:\Program Files (x86)\FHGsoftFR\FinalRecovery\data\is-2PL8P.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
4424	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1048	finalrecovery.exe
1048	finalrecovery.exe
1048	finalrecovery.exe
1048	finalrecovery.exe
1048	finalrecovery.exe
1048	finalrecovery.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4424	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1124 wrote to memory of 1640	1124	file.exe	80
PID 1124 wrote to memory of 1640	1124	file.exe	80
PID 1124 wrote to memory of 1640	1124	file.exe	80
PID 1640 wrote to memory of 1048	1640	file.tmp	81
PID 1640 wrote to memory of 1048	1640	file.tmp	81
PID 1640 wrote to memory of 1048	1640	file.tmp	81
PID 1048 wrote to memory of 400	1048	finalrecovery.exe	82
PID 1048 wrote to memory of 400	1048	finalrecovery.exe	82
PID 1048 wrote to memory of 400	1048	finalrecovery.exe	82
PID 1048 wrote to memory of 360	1048	finalrecovery.exe	90
PID 1048 wrote to memory of 360	1048	finalrecovery.exe	90
PID 1048 wrote to memory of 360	1048	finalrecovery.exe	90
PID 360 wrote to memory of 4424	360	cmd.exe	92
PID 360 wrote to memory of 4424	360	cmd.exe	92
PID 360 wrote to memory of 4424	360	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1124
- C:\Users\Admin\AppData\Local\Temp\is-8EHCR.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-8EHCR.tmp\file.tmp" /SL5="$A0066,2006209,198656,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:1640
- - 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:1048
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\lUmpF.exe
      4⤵
      Executes dropped EXE
      PID:400
  - - 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:360
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "finalrecovery.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4424

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\FHGsoftFR\FinalRecovery\finalrecovery.exe

Filesize
1.9MB

MD5
24571001b383b87a0894169defca2468

SHA1
2d63349a10b5afdf874588d3edb0f04d3a82a892

SHA256
a035c545f0455b067611f48a6dcbfb50d86d9a7d22bbf4e79d25d4ab9ae420c4

SHA512
21ed1577972bc9a5a89de8a85af7c3a7108c59811f664e66101c446567bd5eb54640ef73e91cc68d4bd752230bdeedf4454669e33f22099a66f0386220933a36

Download Submit
C:\Program Files (x86)\FHGsoftFR\FinalRecovery\finalrecovery.exe

Filesize
1.9MB

MD5
24571001b383b87a0894169defca2468

SHA1
2d63349a10b5afdf874588d3edb0f04d3a82a892

SHA256
a035c545f0455b067611f48a6dcbfb50d86d9a7d22bbf4e79d25d4ab9ae420c4

SHA512
21ed1577972bc9a5a89de8a85af7c3a7108c59811f664e66101c446567bd5eb54640ef73e91cc68d4bd752230bdeedf4454669e33f22099a66f0386220933a36

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-04I2R.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-8EHCR.tmp\file.tmp

Filesize
696KB

MD5
d76329b30db65f61d55b20f36b56da26

SHA1
5e4c77b723ae8f05b3ae6afeee735a4355f00663

SHA256
229fbcb11ee7d1f082b6411610e95f726eec4e6737e6b6392719df4f0fe3fa1d

SHA512
a291aed0897315e88b6378b1db10ada05bda8c1eccaf73de23f409fe61860ebd1dbb422063e00996584d3b4b100122931d5bbab54a88951706d75efcc660f70d

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-8EHCR.tmp\file.tmp

Filesize
696KB

MD5
d76329b30db65f61d55b20f36b56da26

SHA1
5e4c77b723ae8f05b3ae6afeee735a4355f00663

SHA256
229fbcb11ee7d1f082b6411610e95f726eec4e6737e6b6392719df4f0fe3fa1d

SHA512
a291aed0897315e88b6378b1db10ada05bda8c1eccaf73de23f409fe61860ebd1dbb422063e00996584d3b4b100122931d5bbab54a88951706d75efcc660f70d

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

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1048-150-0x0000000000400000-0x00000000013E9000-memory.dmp

Filesize
15.9MB

Download
memory/1048-143-0x0000000000400000-0x00000000013E9000-memory.dmp

Filesize
15.9MB

Download
memory/1048-142-0x0000000000400000-0x00000000013E9000-memory.dmp

Filesize
15.9MB

Download
memory/1048-147-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1048-153-0x0000000000400000-0x00000000013E9000-memory.dmp

Filesize
15.9MB

Download
memory/1124-138-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/1124-132-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/1124-154-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download

Analysis

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