gcleaner | a776ea1b4751e08775b98a3283c9cc91ccc07c20adfb158d2224ccc1d136bb40

General

Target

file.exe
Size

1.9MB
MD5

f11783c621c837cff58d4ea72b51f7aa
SHA1

4f396927ce541ced4dfcfb86dbb4b105a8e39af6
SHA256

a776ea1b4751e08775b98a3283c9cc91ccc07c20adfb158d2224ccc1d136bb40
SHA512

72f2237796bf8aa3beef5925630f11216b098cd2f9b71f80e55433abf11317c54f14ce55937f0c6ff09144b6d649d632e554d17ea87ae84aa332235aacc8b420
SSDEEP

49152:xaZ0Dg/Vi1AE3EZsSzSQD1ot7vkHjOM1MKFgTBsrpt2ALCgv2MR:QZ0g9ij2s56aM1MIOZov2MR

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

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-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	FRec25.exe

Executes dropped EXE 3 IoCs

pid	Process
4848	file.tmp
4604	FRec25.exe
4388	1QtHYvpSifNuzY.exe

Loads dropped DLL 1 IoCs

pid	Process
4848	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)\FHKsoftFR\FRec25\unins000.dat	file.tmp
File created	C:\Program Files (x86)\FHKsoftFR\FRec25\is-GFPFE.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\FHKsoftFR\FRec25\unins000.dat	file.tmp
File opened for modification	C:\Program Files (x86)\FHKsoftFR\FRec25\FRec25.exe	file.tmp
File created	C:\Program Files (x86)\FHKsoftFR\FRec25\is-RAM48.tmp	file.tmp
File created	C:\Program Files (x86)\FHKsoftFR\FRec25\is-OVR1O.tmp	file.tmp
File created	C:\Program Files (x86)\FHKsoftFR\FRec25\is-Q0MN3.tmp	file.tmp
File created	C:\Program Files (x86)\FHKsoftFR\FRec25\is-A6ADL.tmp	file.tmp
File created	C:\Program Files (x86)\FHKsoftFR\FRec25\data\is-JFSFP.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
3420	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4604	FRec25.exe
4604	FRec25.exe
4604	FRec25.exe
4604	FRec25.exe
4604	FRec25.exe
4604	FRec25.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3420	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4876 wrote to memory of 4848	4876	file.exe	79
PID 4876 wrote to memory of 4848	4876	file.exe	79
PID 4876 wrote to memory of 4848	4876	file.exe	79
PID 4848 wrote to memory of 4604	4848	file.tmp	80
PID 4848 wrote to memory of 4604	4848	file.tmp	80
PID 4848 wrote to memory of 4604	4848	file.tmp	80
PID 4604 wrote to memory of 4388	4604	FRec25.exe	81
PID 4604 wrote to memory of 4388	4604	FRec25.exe	81
PID 4604 wrote to memory of 4388	4604	FRec25.exe	81
PID 4604 wrote to memory of 3844	4604	FRec25.exe	89
PID 4604 wrote to memory of 3844	4604	FRec25.exe	89
PID 4604 wrote to memory of 3844	4604	FRec25.exe	89
PID 3844 wrote to memory of 3420	3844	cmd.exe	91
PID 3844 wrote to memory of 3420	3844	cmd.exe	91
PID 3844 wrote to memory of 3420	3844	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4876
- C:\Users\Admin\AppData\Local\Temp\is-4JR6Q.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-4JR6Q.tmp\file.tmp" /SL5="$801B8,1769494,97792,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:4848
- - C:\Program Files (x86)\FHKsoftFR\FRec25\FRec25.exe
    "C:\Program Files (x86)\FHKsoftFR\FRec25\FRec25.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4604
  - - C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\1QtHYvpSifNuzY.exe
      4⤵
      Executes dropped EXE
      PID:4388
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "FRec25.exe" /f & erase "C:\Program Files (x86)\FHKsoftFR\FRec25\FRec25.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3844
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "FRec25.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3420

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)\FHKsoftFR\FRec25\FRec25.exe

Filesize
1.9MB

MD5
2b709fdaf8add4eb6885a2bdd5d12ff8

SHA1
1ca9a1d9d7f2aad85b26bb3103d197262ae17082

SHA256
2cd90a6b7e91f4b9efc9abe33379c4f56af53f15d3b9a7294b0fa13a90263c6e

SHA512
2dd30c2f67095a2333c3983924b62e5f5f5394cbf21ea4711f4df89611a1c230251c8c26b19bb5b2d20193e35195fccbcf58ef56daf142cb8987b2cad2303a4e

Download Submit
C:\Program Files (x86)\FHKsoftFR\FRec25\FRec25.exe

Filesize
1.9MB

MD5
2b709fdaf8add4eb6885a2bdd5d12ff8

SHA1
1ca9a1d9d7f2aad85b26bb3103d197262ae17082

SHA256
2cd90a6b7e91f4b9efc9abe33379c4f56af53f15d3b9a7294b0fa13a90263c6e

SHA512
2dd30c2f67095a2333c3983924b62e5f5f5394cbf21ea4711f4df89611a1c230251c8c26b19bb5b2d20193e35195fccbcf58ef56daf142cb8987b2cad2303a4e

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-4JR6Q.tmp\file.tmp

Filesize
696KB

MD5
d76329b30db65f61d55b20f36b56da26

SHA1
5e4c77b723ae8f05b3ae6afeee735a4355f00663

SHA256
229fbcb11ee7d1f082b6411610e95f726eec4e6737e6b6392719df4f0fe3fa1d

SHA512
a291aed0897315e88b6378b1db10ada05bda8c1eccaf73de23f409fe61860ebd1dbb422063e00996584d3b4b100122931d5bbab54a88951706d75efcc660f70d

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-4JR6Q.tmp\file.tmp

Filesize
696KB

MD5
d76329b30db65f61d55b20f36b56da26

SHA1
5e4c77b723ae8f05b3ae6afeee735a4355f00663

SHA256
229fbcb11ee7d1f082b6411610e95f726eec4e6737e6b6392719df4f0fe3fa1d

SHA512
a291aed0897315e88b6378b1db10ada05bda8c1eccaf73de23f409fe61860ebd1dbb422063e00996584d3b4b100122931d5bbab54a88951706d75efcc660f70d

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-D3JP0.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\1QtHYvpSifNuzY.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\1QtHYvpSifNuzY.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/4604-142-0x0000000000400000-0x00000000013DB000-memory.dmp

Filesize
15.9MB

Download
memory/4604-144-0x0000000000400000-0x00000000013DB000-memory.dmp

Filesize
15.9MB

Download
memory/4604-143-0x0000000000400000-0x00000000013DB000-memory.dmp

Filesize
15.9MB

Download
memory/4604-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4604-152-0x0000000000400000-0x00000000013DB000-memory.dmp

Filesize
15.9MB

Download
memory/4604-155-0x0000000000400000-0x00000000013DB000-memory.dmp

Filesize
15.9MB

Download
memory/4876-132-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4876-151-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4876-134-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4876-156-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download

Analysis

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