gcleaner | 48d171a99bb1d0c389a0fdc94d592f4820264c3c9ea1b613618c30ec0088319d

Analysis

max time kernel
50s
max time network
130s
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, 00:32

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General

Target
file.exe
Size 2.1MB
Sample230120-avmfcaeg3s
SHA256 48d171a99bb1d0c389a0fdc94d592f4820264c3c9ea1b613618c30ec0088319d
MD5 5bb1227d28fd8d312b063fb71d4a6263
SHA1 2fdd6469068702d1116538e987c5980139ee6956
SHA512 45823343ccc777dfe91ade850f805fb08835ca3b0c341aa37c3d1bbfa0fd2d6d5c84014d7e2e2705fa8958c334b56879e2698d3c29183e2e2235a2b6194fd414
SSDEEP 49152:1kSQiqd84WKlKZlkE3/0s7f/wtfeEZrM8mY1HJv9lAL6r:DQ1Wa0hM/t2EZQJypFlAL6r
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
1172	file.tmp
4852	finalrecovery.exe
1304	B7tca.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-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	finalrecovery.exe

Loads dropped DLL 1 IoCs

pid	Process
1172	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\unins000.dat	file.tmp
File created	C:\Program Files (x86)\FeusoftFR\FinalRecovery\is-UNAID.tmp	file.tmp
File created	C:\Program Files (x86)\FeusoftFR\FinalRecovery\is-7146H.tmp	file.tmp
File created	C:\Program Files (x86)\FeusoftFR\FinalRecovery\data\is-8ULT9.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\FeusoftFR\FinalRecovery\finalrecovery.exe	file.tmp
File created	C:\Program Files (x86)\FeusoftFR\FinalRecovery\is-V3GA9.tmp	file.tmp
File created	C:\Program Files (x86)\FeusoftFR\FinalRecovery\is-1HG55.tmp	file.tmp
File created	C:\Program Files (x86)\FeusoftFR\FinalRecovery\is-J15QL.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\FeusoftFR\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
344	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4852	finalrecovery.exe
4852	finalrecovery.exe
4852	finalrecovery.exe
4852	finalrecovery.exe
4852	finalrecovery.exe
4852	finalrecovery.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	344	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4356 wrote to memory of 1172	4356	file.exe	81
PID 4356 wrote to memory of 1172	4356	file.exe	81
PID 4356 wrote to memory of 1172	4356	file.exe	81
PID 1172 wrote to memory of 4852	1172	file.tmp	82
PID 1172 wrote to memory of 4852	1172	file.tmp	82
PID 1172 wrote to memory of 4852	1172	file.tmp	82
PID 4852 wrote to memory of 1304	4852	finalrecovery.exe	85
PID 4852 wrote to memory of 1304	4852	finalrecovery.exe	85
PID 4852 wrote to memory of 1304	4852	finalrecovery.exe	85
PID 4852 wrote to memory of 2196	4852	finalrecovery.exe	91
PID 4852 wrote to memory of 2196	4852	finalrecovery.exe	91
PID 4852 wrote to memory of 2196	4852	finalrecovery.exe	91
PID 2196 wrote to memory of 344	2196	cmd.exe	93
PID 2196 wrote to memory of 344	2196	cmd.exe	93
PID 2196 wrote to memory of 344	2196	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:4356
- C:\Users\Admin\AppData\Local\Temp\is-6ARJJ.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-6ARJJ.tmp\file.tmp" /SL5="$601F8,1861729,144896,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:1172
- - 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:4852
  - - C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\B7tca.exe
      4⤵
      Executes dropped EXE
      PID:1304
  - - 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:2196
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "finalrecovery.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:344

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 1.6MB
SHA256 3276080fdc6bce903afd1f6b3b6a6efee6e2090601e05d09d64da8f2370aac83
MD5 19812b1c451809d5fb9016c7418d15df
SHA1 3d35fd3a17be12b7eb1a3dc9fde939a2d6ed36de
SHA512 377a8ba4170d19b6d6466b63a8e77ef82f276031a58036debac7567d22755025a21d14a22e65b6ce3a6abe9702e256940731206785055db7231fbeb10d413db0
SSDEEP 24576:fMBgh6CR3cuwZCvlOBaIvufnXUhm/5iszTqadDABN2Hmp1KWoRMk6+:nXK98L5HesMg
MD5 SHA1 SHA512 SSDEEP

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finalrecovery.exe

Path C:\Program Files (x86)\FeusoftFR\FinalRecovery\finalrecovery.exe
Size 1.6MB
SHA256 3276080fdc6bce903afd1f6b3b6a6efee6e2090601e05d09d64da8f2370aac83
MD5 19812b1c451809d5fb9016c7418d15df
SHA1 3d35fd3a17be12b7eb1a3dc9fde939a2d6ed36de
SHA512 377a8ba4170d19b6d6466b63a8e77ef82f276031a58036debac7567d22755025a21d14a22e65b6ce3a6abe9702e256940731206785055db7231fbeb10d413db0
SSDEEP 24576:fMBgh6CR3cuwZCvlOBaIvufnXUhm/5iszTqadDABN2Hmp1KWoRMk6+:nXK98L5HesMg
MD5 SHA1 SHA512 SSDEEP

Submit Download

file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-6ARJJ.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-6ARJJ.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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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-T509C.tmp\_isetup\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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B7tca.exe

Path C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\B7tca.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

B7tca.exe

Path C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\B7tca.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/4356-151-0x0000000000400000-0x000000000042A000-memory.dmp

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memory/4356-156-0x0000000000400000-0x000000000042A000-memory.dmp

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memory/4356-134-0x0000000000400000-0x000000000042A000-memory.dmp

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memory/4356-132-0x0000000000400000-0x000000000042A000-memory.dmp

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memory/4852-142-0x0000000000400000-0x0000000001399000-memory.dmp

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memory/4852-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4852-152-0x0000000000400000-0x0000000001399000-memory.dmp

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memory/4852-144-0x0000000000400000-0x0000000001399000-memory.dmp

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memory/4852-143-0x0000000000400000-0x0000000001399000-memory.dmp

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memory/4852-155-0x0000000000400000-0x0000000001399000-memory.dmp

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