gcleaner | a33faf18a73447d22dc0d2ccd2cc652bd980dde1062f36b50ab09c05ef3508b6

Analysis

max time kernel
91s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
21/01/2023, 23:31

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General

Target
file.exe
Size 1.8MB
Sample230121-3hpddsgb9y
SHA256 a33faf18a73447d22dc0d2ccd2cc652bd980dde1062f36b50ab09c05ef3508b6
MD5 095d414b9d69aa63b9992288ee82c831
SHA1 572fe6cfb1ba2111755b22a75517f400cfa19380
SHA512 641fe0a22092f9538318c73cfdf1a14e0daaecf1382d05339c1978173856dc4a1b7cc8582eecd0dd41448b6f3cdcf60ae546787287360baabe8c28bcef9980d7
SSDEEP 24576:q3g8INFqVUvbUcXhoUgQupMGrirSnIYv86mwf6XbDKmuMMkIQOVJQkc2ZdHTsEXM:qlvUPXuN7MGGr23vqDK0IZ0kc7EXM
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
3184	file.tmp
3756	finalrecovery.exe
4524	FkTiwb2jMxfO9.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-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	finalrecovery.exe

Loads dropped DLL 1 IoCs

pid	Process
3184	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)\FevsoftFR\FinalRecovery\unins000.dat	file.tmp
File created	C:\Program Files (x86)\FevsoftFR\FinalRecovery\is-RAE0D.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\FevsoftFR\FinalRecovery\unins000.dat	file.tmp
File opened for modification	C:\Program Files (x86)\FevsoftFR\FinalRecovery\finalrecovery.exe	file.tmp
File created	C:\Program Files (x86)\FevsoftFR\FinalRecovery\is-3NJPJ.tmp	file.tmp
File created	C:\Program Files (x86)\FevsoftFR\FinalRecovery\is-8AHCN.tmp	file.tmp
File created	C:\Program Files (x86)\FevsoftFR\FinalRecovery\is-B7BTJ.tmp	file.tmp
File created	C:\Program Files (x86)\FevsoftFR\FinalRecovery\is-K08I6.tmp	file.tmp
File created	C:\Program Files (x86)\FevsoftFR\FinalRecovery\data\is-VGNQC.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
4896	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3756	finalrecovery.exe
3756	finalrecovery.exe
3756	finalrecovery.exe
3756	finalrecovery.exe
3756	finalrecovery.exe
3756	finalrecovery.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4896	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1748 wrote to memory of 3184	1748	file.exe	81
PID 1748 wrote to memory of 3184	1748	file.exe	81
PID 1748 wrote to memory of 3184	1748	file.exe	81
PID 3184 wrote to memory of 3756	3184	file.tmp	82
PID 3184 wrote to memory of 3756	3184	file.tmp	82
PID 3184 wrote to memory of 3756	3184	file.tmp	82
PID 3756 wrote to memory of 4524	3756	finalrecovery.exe	83
PID 3756 wrote to memory of 4524	3756	finalrecovery.exe	83
PID 3756 wrote to memory of 4524	3756	finalrecovery.exe	83
PID 3756 wrote to memory of 1988	3756	finalrecovery.exe	91
PID 3756 wrote to memory of 1988	3756	finalrecovery.exe	91
PID 3756 wrote to memory of 1988	3756	finalrecovery.exe	91
PID 1988 wrote to memory of 4896	1988	cmd.exe	93
PID 1988 wrote to memory of 4896	1988	cmd.exe	93
PID 1988 wrote to memory of 4896	1988	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1748
- C:\Users\Admin\AppData\Local\Temp\is-TV827.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-TV827.tmp\file.tmp" /SL5="$A0054,1605648,51712,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:3184
- - C:\Program Files (x86)\FevsoftFR\FinalRecovery\finalrecovery.exe
    "C:\Program Files (x86)\FevsoftFR\FinalRecovery\finalrecovery.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:3756
  - - C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\FkTiwb2jMxfO9.exe
      4⤵
      Executes dropped EXE
      PID:4524
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "finalrecovery.exe" /f & erase "C:\Program Files (x86)\FevsoftFR\FinalRecovery\finalrecovery.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1988
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "finalrecovery.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4896

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)\FevsoftFR\FinalRecovery\finalrecovery.exe
Size 1.4MB
SHA256 0304613044fd396368925f47032253771209aa2c31e4f136519896f0117f0789
MD5 80db5f8de9f83581529ca588a199f6f7
SHA1 7b549f4807bdf1a43dc54500e07218a8608a0f8b
SHA512 9e317a88189cd60ef394c70671770db54885908b5ead4d1dbab1d82cfbd613f15e309b21e429b6ccdcec90fb0a412f1a4b2d9dea836be9f62367a611f6561107
SSDEEP 24576:ZgzwyIx0nviYIjhCqzaIvufnXpm/Io8y4L1+Fs0iNU83FuNukNnbi/+:K6dYR098ayoFqS
MD5 SHA1 SHA512 SSDEEP

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finalrecovery.exe

Path C:\Program Files (x86)\FevsoftFR\FinalRecovery\finalrecovery.exe
Size 1.4MB
SHA256 0304613044fd396368925f47032253771209aa2c31e4f136519896f0117f0789
MD5 80db5f8de9f83581529ca588a199f6f7
SHA1 7b549f4807bdf1a43dc54500e07218a8608a0f8b
SHA512 9e317a88189cd60ef394c70671770db54885908b5ead4d1dbab1d82cfbd613f15e309b21e429b6ccdcec90fb0a412f1a4b2d9dea836be9f62367a611f6561107
SSDEEP 24576:ZgzwyIx0nviYIjhCqzaIvufnXpm/Io8y4L1+Fs0iNU83FuNukNnbi/+:K6dYR098ayoFqS
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-ACBM3.tmp\_isetup\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-TV827.tmp\file.tmp
Size 693KB
SHA256 a6b8cba5b41e661f6c6a7b85f7e9c6e8e21b8ef8337f9f2b831b6378aaeb8d8e
MD5 a33e05f848b0ae40f7cefbeeb403cacc
SHA1 c4c89490421a09b87562c0f20cad0f00c94e79f4
SHA512 1839cd87f4fef1b1b4c71d582854a66633418563bc33a8481b793fad5ced623e545aa8a6f03c88082bae5ed4df156dc8b3e3d2660871af946dc6badd6042f4e0
SSDEEP 12288:yQtLeYXPEv4arPEn37TzH7A6p3xxu9yz/eERMY1VLJrNufs9RZM2GHOQyD362kO/:9tCUA4arPEn37TzH7A6nw9yzeESUFWHY
MD5 SHA1 SHA512 SSDEEP

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file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-TV827.tmp\file.tmp
Size 693KB
SHA256 a6b8cba5b41e661f6c6a7b85f7e9c6e8e21b8ef8337f9f2b831b6378aaeb8d8e
MD5 a33e05f848b0ae40f7cefbeeb403cacc
SHA1 c4c89490421a09b87562c0f20cad0f00c94e79f4
SHA512 1839cd87f4fef1b1b4c71d582854a66633418563bc33a8481b793fad5ced623e545aa8a6f03c88082bae5ed4df156dc8b3e3d2660871af946dc6badd6042f4e0
SSDEEP 12288:yQtLeYXPEv4arPEn37TzH7A6p3xxu9yz/eERMY1VLJrNufs9RZM2GHOQyD362kO/:9tCUA4arPEn37TzH7A6nw9yzeESUFWHY
MD5 SHA1 SHA512 SSDEEP

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FkTiwb2jMxfO9.exe

Path C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\FkTiwb2jMxfO9.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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FkTiwb2jMxfO9.exe

Path C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\FkTiwb2jMxfO9.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/1748-150-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/1748-155-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/1748-132-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/1748-137-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/3756-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/3756-151-0x0000000000400000-0x000000000135D000-memory.dmp

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memory/3756-143-0x0000000000400000-0x000000000135D000-memory.dmp

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memory/3756-154-0x0000000000400000-0x000000000135D000-memory.dmp

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memory/3756-142-0x0000000000400000-0x000000000135D000-memory.dmp

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