gcleaner | 72efc3ca827711c128c90a926dd9b50535d1dad4b020464e2268936b2fb14a5b

General

Target

file.exe
Size

2.1MB
MD5

df3d16f606a6dd53e354f0a1ebc65add
SHA1

881c6181ca75fea4a1b037b84195f42a3278938b
SHA256

72efc3ca827711c128c90a926dd9b50535d1dad4b020464e2268936b2fb14a5b
SHA512

666ba447ec7fb1e6cf98c3299af77cc01e0fa8a555cb780c791f4b006b9eebc2447a9311c2ad8bf20d700bcd39d1763c0e3f8ee77a5ef0b38c7cbd3d27460382
SSDEEP

49152:icPLnQTgwNkOV5o0byYLOhc/XtSLCgv2MR:XPLnQTBN3V2/OQv2MR

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
368	file.tmp
1684	finalrecovery.exe
2736	8OEJZOpq5.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
368	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-GUDRK.tmp	file.tmp
File created	C:\Program Files (x86)\FHGsoftFR\FinalRecovery\is-TNC27.tmp	file.tmp
File created	C:\Program Files (x86)\FHGsoftFR\FinalRecovery\is-FNS9O.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-R3TQR.tmp	file.tmp
File created	C:\Program Files (x86)\FHGsoftFR\FinalRecovery\is-N3IV8.tmp	file.tmp
File created	C:\Program Files (x86)\FHGsoftFR\FinalRecovery\data\is-VIKSF.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\FHGsoftFR\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
2560	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1684	finalrecovery.exe
1684	finalrecovery.exe
1684	finalrecovery.exe
1684	finalrecovery.exe
1684	finalrecovery.exe
1684	finalrecovery.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2560	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4568 wrote to memory of 368	4568	file.exe	82
PID 4568 wrote to memory of 368	4568	file.exe	82
PID 4568 wrote to memory of 368	4568	file.exe	82
PID 368 wrote to memory of 1684	368	file.tmp	83
PID 368 wrote to memory of 1684	368	file.tmp	83
PID 368 wrote to memory of 1684	368	file.tmp	83
PID 1684 wrote to memory of 2736	1684	finalrecovery.exe	84
PID 1684 wrote to memory of 2736	1684	finalrecovery.exe	84
PID 1684 wrote to memory of 2736	1684	finalrecovery.exe	84
PID 1684 wrote to memory of 1504	1684	finalrecovery.exe	92
PID 1684 wrote to memory of 1504	1684	finalrecovery.exe	92
PID 1684 wrote to memory of 1504	1684	finalrecovery.exe	92
PID 1504 wrote to memory of 2560	1504	cmd.exe	94
PID 1504 wrote to memory of 2560	1504	cmd.exe	94
PID 1504 wrote to memory of 2560	1504	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:4568
- C:\Users\Admin\AppData\Local\Temp\is-H1A92.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-H1A92.tmp\file.tmp" /SL5="$8004A,1932501,198656,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:368
- - 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:1684
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\8OEJZOpq5.exe
      4⤵
      Executes dropped EXE
      PID:2736
  - - 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:1504
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "finalrecovery.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2560

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
695445138db78c5173f29ecace39283b

SHA1
a08e4e6b98a2f24e3a76fcd8f242ddf110e6eb64

SHA256
5a82d87d8a9bd6ac4bcd04607660392714105635ab418ec71edaf1c06a6b2b36

SHA512
26e0bcbe66212878e0fb4ac94c35488c78d30eb5ee130b368bd6e3d19b4a3596e51f8a85ff6776559262f52858e6175630620b1e493daa39b5e99ca792935e3c

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

Filesize
1.9MB

MD5
695445138db78c5173f29ecace39283b

SHA1
a08e4e6b98a2f24e3a76fcd8f242ddf110e6eb64

SHA256
5a82d87d8a9bd6ac4bcd04607660392714105635ab418ec71edaf1c06a6b2b36

SHA512
26e0bcbe66212878e0fb4ac94c35488c78d30eb5ee130b368bd6e3d19b4a3596e51f8a85ff6776559262f52858e6175630620b1e493daa39b5e99ca792935e3c

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-H1A92.tmp\file.tmp

Filesize
696KB

MD5
d76329b30db65f61d55b20f36b56da26

SHA1
5e4c77b723ae8f05b3ae6afeee735a4355f00663

SHA256
229fbcb11ee7d1f082b6411610e95f726eec4e6737e6b6392719df4f0fe3fa1d

SHA512
a291aed0897315e88b6378b1db10ada05bda8c1eccaf73de23f409fe61860ebd1dbb422063e00996584d3b4b100122931d5bbab54a88951706d75efcc660f70d

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-H1A92.tmp\file.tmp

Filesize
696KB

MD5
d76329b30db65f61d55b20f36b56da26

SHA1
5e4c77b723ae8f05b3ae6afeee735a4355f00663

SHA256
229fbcb11ee7d1f082b6411610e95f726eec4e6737e6b6392719df4f0fe3fa1d

SHA512
a291aed0897315e88b6378b1db10ada05bda8c1eccaf73de23f409fe61860ebd1dbb422063e00996584d3b4b100122931d5bbab54a88951706d75efcc660f70d

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-N1N2K.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\8OEJZOpq5.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\8OEJZOpq5.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1684-150-0x0000000000400000-0x00000000013E9000-memory.dmp

Filesize
15.9MB

Download
memory/1684-142-0x0000000000400000-0x00000000013E9000-memory.dmp

Filesize
15.9MB

Download
memory/1684-141-0x0000000000400000-0x00000000013E9000-memory.dmp

Filesize
15.9MB

Download
memory/1684-146-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1684-153-0x0000000000400000-0x00000000013E9000-memory.dmp

Filesize
15.9MB

Download
memory/4568-149-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/4568-132-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/4568-154-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download

Analysis

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