gcleaner | 13623e711bf1f8f66e3a58db1f55183bbb6c3f77f7dda0cda71797fb16b2649f

Analysis

max time kernel
91s
max time network
140s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
20/01/2023, 02:57

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General

Target
file.exe
Size 2.0MB
Sample230120-dfkvraga3x
SHA256 13623e711bf1f8f66e3a58db1f55183bbb6c3f77f7dda0cda71797fb16b2649f
MD5 89aadd440c921143d44ab6383d46eaf2
SHA1 7539e340a99aac4512cd5eeabcdfd05bd32fe1c8
SHA512 eb7c63dd607ab32048834b1f5cc3113592312df25354fc4d15be94ff3a29a052561a0e2a64fe417152ac196345eb69b3d4017a58f6a5eef0fbda409771c65881
SSDEEP 49152:1kwI9UBu17HZlRD+kprMhMqzZHS0H8dlAL6r:zGj7np+kspL8dlAL6r
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
2500	file.tmp
4340	finalrecovery.exe
4432	U86rzDcE0bW.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
2500	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)\FeusoftFR\FinalRecovery\is-3KSHI.tmp	file.tmp
File created	C:\Program Files (x86)\FeusoftFR\FinalRecovery\is-HAULQ.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\FeusoftFR\FinalRecovery\unins000.dat	file.tmp
File opened for modification	C:\Program Files (x86)\FeusoftFR\FinalRecovery\finalrecovery.exe	file.tmp
File created	C:\Program Files (x86)\FeusoftFR\FinalRecovery\unins000.dat	file.tmp
File created	C:\Program Files (x86)\FeusoftFR\FinalRecovery\is-Q3RTQ.tmp	file.tmp
File created	C:\Program Files (x86)\FeusoftFR\FinalRecovery\is-5RS06.tmp	file.tmp
File created	C:\Program Files (x86)\FeusoftFR\FinalRecovery\is-U9A1C.tmp	file.tmp
File created	C:\Program Files (x86)\FeusoftFR\FinalRecovery\data\is-11DB9.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
1936	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4340	finalrecovery.exe
4340	finalrecovery.exe
4340	finalrecovery.exe
4340	finalrecovery.exe
4340	finalrecovery.exe
4340	finalrecovery.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1936	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1508 wrote to memory of 2500	1508	file.exe	82
PID 1508 wrote to memory of 2500	1508	file.exe	82
PID 1508 wrote to memory of 2500	1508	file.exe	82
PID 2500 wrote to memory of 4340	2500	file.tmp	83
PID 2500 wrote to memory of 4340	2500	file.tmp	83
PID 2500 wrote to memory of 4340	2500	file.tmp	83
PID 4340 wrote to memory of 4432	4340	finalrecovery.exe	84
PID 4340 wrote to memory of 4432	4340	finalrecovery.exe	84
PID 4340 wrote to memory of 4432	4340	finalrecovery.exe	84
PID 4340 wrote to memory of 4808	4340	finalrecovery.exe	92
PID 4340 wrote to memory of 4808	4340	finalrecovery.exe	92
PID 4340 wrote to memory of 4808	4340	finalrecovery.exe	92
PID 4808 wrote to memory of 1936	4808	cmd.exe	94
PID 4808 wrote to memory of 1936	4808	cmd.exe	94
PID 4808 wrote to memory of 1936	4808	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:1508
- C:\Users\Admin\AppData\Local\Temp\is-T0114.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-T0114.tmp\file.tmp" /SL5="$B01BE,1726620,144896,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:2500
- - C:\Program Files (x86)\FeusoftFR\FinalRecovery\finalrecovery.exe
    "C:\Program Files (x86)\FeusoftFR\FinalRecovery\finalrecovery.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4340
  - - C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\U86rzDcE0bW.exe
      4⤵
      Executes dropped EXE
      PID:4432
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "finalrecovery.exe" /f & erase "C:\Program Files (x86)\FeusoftFR\FinalRecovery\finalrecovery.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4808
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "finalrecovery.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1936

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)\FeusoftFR\FinalRecovery\finalrecovery.exe
Size 1.4MB
SHA256 a54e7fb548937f20b3e39744e05bf698e05c9b9370875f718423e820b4597d08
MD5 d216eaa7dc3088c83744e0f41019e36d
SHA1 60aa0ada7768a83d686d8126d00f4dfea3cf1887
SHA512 25a1b8f803be69eb56914fd2bf3439bc9fada632c3e24ef2c2661560633cf5febd1aa2279d173b361675df39f2162c1780da00e520e9d74dea47e90cffcbdc4d
SSDEEP 24576:4Qhi9G4blt/os7O5aIvufnXUhm/1LQVaFZSlaz8Db8Ls69dmM:f+098L6jxDUs69dz
MD5 SHA1 SHA512 SSDEEP

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finalrecovery.exe

Path C:\Program Files (x86)\FeusoftFR\FinalRecovery\finalrecovery.exe
Size 1.4MB
SHA256 a54e7fb548937f20b3e39744e05bf698e05c9b9370875f718423e820b4597d08
MD5 d216eaa7dc3088c83744e0f41019e36d
SHA1 60aa0ada7768a83d686d8126d00f4dfea3cf1887
SHA512 25a1b8f803be69eb56914fd2bf3439bc9fada632c3e24ef2c2661560633cf5febd1aa2279d173b361675df39f2162c1780da00e520e9d74dea47e90cffcbdc4d
SSDEEP 24576:4Qhi9G4blt/os7O5aIvufnXUhm/1LQVaFZSlaz8Db8Ls69dmM:f+098L6jxDUs69dz
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-N9LNP.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-T0114.tmp\file.tmp
Size 784KB
SHA256 a8e2580185249ed570f420e04af19611eaad9edc5e19f27d059e5c60401f27d2
MD5 44895a64cc609d108a450b3a5db9ec65
SHA1 da298995b519740e85f9b2b248329a6aabb22d43
SHA512 21d4191356e974e4b27df78d3f16b4a64ecbb5f81aeabbd6978761814650c40635fd1f0e2936f2a4fd508614c7f3e3173f0a38ef95d336f6cc8e95ee5ed55c8a
SSDEEP 24576:LtCUA4arPEn37TzH7A6nw9yzeESUFWHc7Km/yXEx9Ub:LkdrP837TzH7A6nV7FMcV32
MD5 SHA1 SHA512 SSDEEP

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file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-T0114.tmp\file.tmp
Size 784KB
SHA256 a8e2580185249ed570f420e04af19611eaad9edc5e19f27d059e5c60401f27d2
MD5 44895a64cc609d108a450b3a5db9ec65
SHA1 da298995b519740e85f9b2b248329a6aabb22d43
SHA512 21d4191356e974e4b27df78d3f16b4a64ecbb5f81aeabbd6978761814650c40635fd1f0e2936f2a4fd508614c7f3e3173f0a38ef95d336f6cc8e95ee5ed55c8a
SSDEEP 24576:LtCUA4arPEn37TzH7A6nw9yzeESUFWHc7Km/yXEx9Ub:LkdrP837TzH7A6nV7FMcV32
MD5 SHA1 SHA512 SSDEEP

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U86rzDcE0bW.exe

Path C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\U86rzDcE0bW.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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U86rzDcE0bW.exe

Path C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\U86rzDcE0bW.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/1508-138-0x0000000000400000-0x000000000042A000-memory.dmp

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memory/1508-154-0x0000000000400000-0x000000000042A000-memory.dmp

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memory/1508-132-0x0000000000400000-0x000000000042A000-memory.dmp

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memory/4340-143-0x0000000000400000-0x0000000001368000-memory.dmp

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memory/4340-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4340-150-0x0000000000400000-0x0000000001368000-memory.dmp

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memory/4340-142-0x0000000000400000-0x0000000001368000-memory.dmp

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memory/4340-153-0x0000000000400000-0x0000000001368000-memory.dmp

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