gcleaner | b423b216eae47d644e1271bab3b7cf56cc2af2fa3653513a32415f7675117643

Analysis

max time kernel
91s
max time network
126s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
28/01/2023, 00:17

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General

Target
file.exe
Size 1.9MB
Sample230128-ak2saade83
SHA256 b423b216eae47d644e1271bab3b7cf56cc2af2fa3653513a32415f7675117643
MD5 8a03fd9716ad2ee89592845dc9162d85
SHA1 9522ff7c908739ad156c05566bd9b5c21d7103c9
SHA512 24564e849a6e13a495891929cf1268f7915574fbb5cbd492fecb6ec50a0fa66b17ea79ee4c7d23e0e9c4407bc6ef357d628d64625742753346b91f73ae838ba8
SSDEEP 49152:okug+RaruCSQWi1jQMO5s0YbBTTu1UcYShmpsWLCgv2MR:hug+RarRx1kMO5WbpuatqGv2MR
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
2256	file.tmp
3740	finalrecovery.exe
1284	O411u.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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	finalrecovery.exe

Loads dropped DLL 1 IoCs

pid	Process
2256	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)\FgcsoftFR\FinalRecovery\unins000.dat	file.tmp
File created	C:\Program Files (x86)\FgcsoftFR\FinalRecovery\is-9R3H6.tmp	file.tmp
File created	C:\Program Files (x86)\FgcsoftFR\FinalRecovery\is-EMFIP.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\FgcsoftFR\FinalRecovery\finalrecovery.exe	file.tmp
File created	C:\Program Files (x86)\FgcsoftFR\FinalRecovery\is-MHMDB.tmp	file.tmp
File created	C:\Program Files (x86)\FgcsoftFR\FinalRecovery\is-0IS0B.tmp	file.tmp
File created	C:\Program Files (x86)\FgcsoftFR\FinalRecovery\is-OO3UN.tmp	file.tmp
File created	C:\Program Files (x86)\FgcsoftFR\FinalRecovery\data\is-I754C.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\FgcsoftFR\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
2396	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3740	finalrecovery.exe
3740	finalrecovery.exe
3740	finalrecovery.exe
3740	finalrecovery.exe
3740	finalrecovery.exe
3740	finalrecovery.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2396	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4904 wrote to memory of 2256	4904	file.exe	81
PID 4904 wrote to memory of 2256	4904	file.exe	81
PID 4904 wrote to memory of 2256	4904	file.exe	81
PID 2256 wrote to memory of 3740	2256	file.tmp	82
PID 2256 wrote to memory of 3740	2256	file.tmp	82
PID 2256 wrote to memory of 3740	2256	file.tmp	82
PID 3740 wrote to memory of 1284	3740	finalrecovery.exe	83
PID 3740 wrote to memory of 1284	3740	finalrecovery.exe	83
PID 3740 wrote to memory of 1284	3740	finalrecovery.exe	83
PID 3740 wrote to memory of 1980	3740	finalrecovery.exe	91
PID 3740 wrote to memory of 1980	3740	finalrecovery.exe	91
PID 3740 wrote to memory of 1980	3740	finalrecovery.exe	91
PID 1980 wrote to memory of 2396	1980	cmd.exe	93
PID 1980 wrote to memory of 2396	1980	cmd.exe	93
PID 1980 wrote to memory of 2396	1980	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:4904
- C:\Users\Admin\AppData\Local\Temp\is-QQ597.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-QQ597.tmp\file.tmp" /SL5="$701C8,1721494,135168,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:2256
- - C:\Program Files (x86)\FgcsoftFR\FinalRecovery\finalrecovery.exe
    "C:\Program Files (x86)\FgcsoftFR\FinalRecovery\finalrecovery.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:3740
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\O411u.exe
      4⤵
      Executes dropped EXE
      PID:1284
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "finalrecovery.exe" /f & erase "C:\Program Files (x86)\FgcsoftFR\FinalRecovery\finalrecovery.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1980
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "finalrecovery.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2396

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)\FgcsoftFR\FinalRecovery\finalrecovery.exe
Size 1.5MB
SHA256 399b95c5e39d7e64f749468762130c155a70d2554fdba87779be78e80b498988
MD5 0eafbb4d7821798baa72ad04e87ad382
SHA1 589bd77566d65b57bd0e4e607190df3318951101
SHA512 4c98fa4f7cf309caaa8d070570ffbf3af39277952fd8a3aba277edb55aa20861bccf90e5ccb82acf58c52eed4894a9fd137788bdcad9da236f707bf04845248b
SSDEEP 24576:svw1mLVuK4/NMPnt+hm/GAiVsqoPRW0aHDoG8YONVPMc/Z+dGICzJaMG:0SW8FgnfGAhP0hxOfBKCl+
MD5 SHA1 SHA512 SSDEEP

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finalrecovery.exe

Path C:\Program Files (x86)\FgcsoftFR\FinalRecovery\finalrecovery.exe
Size 1.5MB
SHA256 399b95c5e39d7e64f749468762130c155a70d2554fdba87779be78e80b498988
MD5 0eafbb4d7821798baa72ad04e87ad382
SHA1 589bd77566d65b57bd0e4e607190df3318951101
SHA512 4c98fa4f7cf309caaa8d070570ffbf3af39277952fd8a3aba277edb55aa20861bccf90e5ccb82acf58c52eed4894a9fd137788bdcad9da236f707bf04845248b
SSDEEP 24576:svw1mLVuK4/NMPnt+hm/GAiVsqoPRW0aHDoG8YONVPMc/Z+dGICzJaMG:0SW8FgnfGAhP0hxOfBKCl+
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-HK9V0.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-QQ597.tmp\file.tmp
Size 696KB
SHA256 229fbcb11ee7d1f082b6411610e95f726eec4e6737e6b6392719df4f0fe3fa1d
MD5 d76329b30db65f61d55b20f36b56da26
SHA1 5e4c77b723ae8f05b3ae6afeee735a4355f00663
SHA512 a291aed0897315e88b6378b1db10ada05bda8c1eccaf73de23f409fe61860ebd1dbb422063e00996584d3b4b100122931d5bbab54a88951706d75efcc660f70d
SSDEEP 12288:9QtLeYXPEv4arPEn37TzH7A6p3xxu9yz/eERMY1VLJrNufs9RZM2GHOQyD362kS0:+tCUA4arPEn37TzH7A6nw9yzeESUFWH/
MD5 SHA1 SHA512 SSDEEP

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file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-QQ597.tmp\file.tmp
Size 696KB
SHA256 229fbcb11ee7d1f082b6411610e95f726eec4e6737e6b6392719df4f0fe3fa1d
MD5 d76329b30db65f61d55b20f36b56da26
SHA1 5e4c77b723ae8f05b3ae6afeee735a4355f00663
SHA512 a291aed0897315e88b6378b1db10ada05bda8c1eccaf73de23f409fe61860ebd1dbb422063e00996584d3b4b100122931d5bbab54a88951706d75efcc660f70d
SSDEEP 12288:9QtLeYXPEv4arPEn37TzH7A6p3xxu9yz/eERMY1VLJrNufs9RZM2GHOQyD362kS0:+tCUA4arPEn37TzH7A6nw9yzeESUFWH/
MD5 SHA1 SHA512 SSDEEP

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O411u.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\O411u.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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O411u.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\O411u.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/3740-150-0x0000000000400000-0x0000000001374000-memory.dmp

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memory/3740-143-0x0000000000400000-0x0000000001374000-memory.dmp

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memory/3740-142-0x0000000000400000-0x0000000001374000-memory.dmp

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memory/3740-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/3740-153-0x0000000000400000-0x0000000001374000-memory.dmp

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memory/4904-132-0x0000000000400000-0x0000000000428000-memory.dmp

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memory/4904-138-0x0000000000400000-0x0000000000428000-memory.dmp

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memory/4904-154-0x0000000000400000-0x0000000000428000-memory.dmp

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