gcleaner | 1c821e8b3af28342dd4b32a281cdf1c9f08531ea85811ff82e44e5a23b2414a2

Analysis

max time kernel
134s
max time network
137s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
20/06/2023, 06:51

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General

Target
33bbf60952da13ac774f1508298d8ec3.exe
Size 2.6MB
Sample230620-hmhq7aae96
SHA256 1c821e8b3af28342dd4b32a281cdf1c9f08531ea85811ff82e44e5a23b2414a2
MD5 33bbf60952da13ac774f1508298d8ec3
SHA1 2eb4b0601ace67c2d1846eceb97e708a809e1612
SHA512 cd4d34caf48d1cb0ee01cabc767b98be0f85498c55b0481cd0983d6082c6c0b2b76fa304b664109549c5261b5814cc1f5771eaa9d0ad75c932e15544ef7d8d6f
SSDEEP 49152:2GagILkCNuHrU+nKmCQQwJTuJDvjfwDER2Y/cSGaC3wF9VgSpyGapaYXZWXuN:fagZC2fnjVmjfwDERP/jGf3o9VgSRapX
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

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-1-5-21-4238149048-355649189-894321705-1000\Control Panel\International\Geo\Nation	Rec620.exe

Executes dropped EXE 3 IoCs

pid	Process
4072	is-6OP1N.tmp
3316	Rec620.exe
3176	CEjsQT1WGUM.exe

Loads dropped DLL 1 IoCs

pid	Process
4072	is-6OP1N.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)\FMPCover\Rec620\unins000.dat	is-6OP1N.tmp
File created	C:\Program Files (x86)\FMPCover\Rec620\is-2HB85.tmp	is-6OP1N.tmp
File created	C:\Program Files (x86)\FMPCover\Rec620\is-K9H56.tmp	is-6OP1N.tmp
File created	C:\Program Files (x86)\FMPCover\Rec620\is-9Q6GM.tmp	is-6OP1N.tmp
File created	C:\Program Files (x86)\FMPCover\Rec620\is-R6GDE.tmp	is-6OP1N.tmp
File created	C:\Program Files (x86)\FMPCover\Rec620\is-5C5DA.tmp	is-6OP1N.tmp
File created	C:\Program Files (x86)\FMPCover\Rec620\data\is-G97TV.tmp	is-6OP1N.tmp
File opened for modification	C:\Program Files (x86)\FMPCover\Rec620\unins000.dat	is-6OP1N.tmp
File opened for modification	C:\Program Files (x86)\FMPCover\Rec620\Rec620.exe	is-6OP1N.tmp

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
3784	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3316	Rec620.exe
3316	Rec620.exe
3316	Rec620.exe
3316	Rec620.exe
3316	Rec620.exe
3316	Rec620.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3784	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 180 wrote to memory of 4072	180	33bbf60952da13ac774f1508298d8ec3.exe	83
PID 180 wrote to memory of 4072	180	33bbf60952da13ac774f1508298d8ec3.exe	83
PID 180 wrote to memory of 4072	180	33bbf60952da13ac774f1508298d8ec3.exe	83
PID 4072 wrote to memory of 3316	4072	is-6OP1N.tmp	84
PID 4072 wrote to memory of 3316	4072	is-6OP1N.tmp	84
PID 4072 wrote to memory of 3316	4072	is-6OP1N.tmp	84
PID 3316 wrote to memory of 3176	3316	Rec620.exe	85
PID 3316 wrote to memory of 3176	3316	Rec620.exe	85
PID 3316 wrote to memory of 3176	3316	Rec620.exe	85
PID 3316 wrote to memory of 3304	3316	Rec620.exe	93
PID 3316 wrote to memory of 3304	3316	Rec620.exe	93
PID 3316 wrote to memory of 3304	3316	Rec620.exe	93
PID 3304 wrote to memory of 3784	3304	cmd.exe	95
PID 3304 wrote to memory of 3784	3304	cmd.exe	95
PID 3304 wrote to memory of 3784	3304	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\33bbf60952da13ac774f1508298d8ec3.exe
"C:\Users\Admin\AppData\Local\Temp\33bbf60952da13ac774f1508298d8ec3.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:180
- C:\Users\Admin\AppData\Local\Temp\is-A0SQB.tmp\is-6OP1N.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-A0SQB.tmp\is-6OP1N.tmp" /SL4 $90056 "C:\Users\Admin\AppData\Local\Temp\33bbf60952da13ac774f1508298d8ec3.exe" 2483515 185856
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4072
- - C:\Program Files (x86)\FMPCover\Rec620\Rec620.exe
    "C:\Program Files (x86)\FMPCover\Rec620\Rec620.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:3316
  - - C:\Users\Admin\AppData\Roaming\{5cebde14-b1a3-11ed-bd92-806e6f6e6963}\CEjsQT1WGUM.exe
      4⤵
      Executes dropped EXE
      PID:3176
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "Rec620.exe" /f & erase "C:\Program Files (x86)\FMPCover\Rec620\Rec620.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3304
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "Rec620.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3784

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

Rec620.exe

Path C:\Program Files (x86)\FMPCover\Rec620\Rec620.exe
Size 3.4MB
SHA256 f7179acaa5f2cb4381c14a82f1f1cd44f7462f82f4f62a45b0f9d5d8f4a5b2e7
MD5 0fbe2d019ff32935430afc88c02b021e
SHA1 fa8d682aee806bd461cb91a0fde6913f3544f6a8
SHA512 5271825d1b5ccac5eded8d2878b7b5a8f992c741661c5771819e15f290d7852c45d2cbc04c856483fca921a1011bb354b9fd500332e7c143a8c7edcbce830f07
SSDEEP 24576:BC2COC2eoCsgCGfCEjCwCPjbLnd+6ZwFs/rG6Z95f0QifQxBC4FL/npNe2n64fKK:nezYjbLdVk4TyQifQBp5VKeJFJR/l
MD5 SHA1 SHA512 SSDEEP

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Rec620.exe

Path C:\Program Files (x86)\FMPCover\Rec620\Rec620.exe
Size 3.4MB
SHA256 f7179acaa5f2cb4381c14a82f1f1cd44f7462f82f4f62a45b0f9d5d8f4a5b2e7
MD5 0fbe2d019ff32935430afc88c02b021e
SHA1 fa8d682aee806bd461cb91a0fde6913f3544f6a8
SHA512 5271825d1b5ccac5eded8d2878b7b5a8f992c741661c5771819e15f290d7852c45d2cbc04c856483fca921a1011bb354b9fd500332e7c143a8c7edcbce830f07
SSDEEP 24576:BC2COC2eoCsgCGfCEjCwCPjbLnd+6ZwFs/rG6Z95f0QifQxBC4FL/npNe2n64fKK:nezYjbLdVk4TyQifQBp5VKeJFJR/l
MD5 SHA1 SHA512 SSDEEP

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dll[1].htm

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\0BMP3ERH\dll[1].htm
Size 1B
SHA256 5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9
MD5 cfcd208495d565ef66e7dff9f98764da
SHA1 b6589fc6ab0dc82cf12099d1c2d40ab994e8410c
SHA512 31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99
MD5 SHA1 SHA512

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is-6OP1N.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-A0SQB.tmp\is-6OP1N.tmp
Size 775KB
SHA256 6ac957b8d1a5c527b577c5b54aaed259fd33665bd715f524fd1abf46450fe624
MD5 734646d1b2e5195669d1cc8ddc066a10
SHA1 b37038644573daf13107caf4adb2af43b0fd92bb
SHA512 cb25c41f63e624af65d3c850676b50f0a593d6c417cbb777bc0c90ad52be794e027f0240e4bb339db0d9336d4f8b03cb8be9c07af285b428e23fcc0809f10e00
SSDEEP 12288:ieuHnWgyrgVu4rPy37WzH0A6uaF4JNK3NFRvYaajclvhwdxO9:7uHcrgVxrPy37WzH0A6uwkNKfKGwdxO9
MD5 SHA1 SHA512 SSDEEP

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is-6OP1N.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-A0SQB.tmp\is-6OP1N.tmp
Size 775KB
SHA256 6ac957b8d1a5c527b577c5b54aaed259fd33665bd715f524fd1abf46450fe624
MD5 734646d1b2e5195669d1cc8ddc066a10
SHA1 b37038644573daf13107caf4adb2af43b0fd92bb
SHA512 cb25c41f63e624af65d3c850676b50f0a593d6c417cbb777bc0c90ad52be794e027f0240e4bb339db0d9336d4f8b03cb8be9c07af285b428e23fcc0809f10e00
SSDEEP 12288:ieuHnWgyrgVu4rPy37WzH0A6uaF4JNK3NFRvYaajclvhwdxO9:7uHcrgVxrPy37WzH0A6uwkNKfKGwdxO9
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

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

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CEjsQT1WGUM.exe

Path C:\Users\Admin\AppData\Roaming\{5cebde14-b1a3-11ed-bd92-806e6f6e6963}\CEjsQT1WGUM.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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CEjsQT1WGUM.exe

Path C:\Users\Admin\AppData\Roaming\{5cebde14-b1a3-11ed-bd92-806e6f6e6963}\CEjsQT1WGUM.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/180-133-0x0000000000400000-0x0000000000434000-memory.dmp

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memory/180-139-0x0000000000400000-0x0000000000434000-memory.dmp

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memory/180-203-0x0000000000400000-0x0000000000434000-memory.dmp

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memory/3316-168-0x0000000000400000-0x0000000001567000-memory.dmp

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memory/3316-167-0x0000000000400000-0x0000000001567000-memory.dmp

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memory/3316-177-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/3316-183-0x0000000000400000-0x0000000001567000-memory.dmp

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memory/3316-201-0x0000000000400000-0x0000000001567000-memory.dmp

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memory/4072-149-0x0000000002360000-0x0000000002361000-memory.dmp

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memory/4072-169-0x0000000000400000-0x00000000004D1000-memory.dmp

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memory/4072-202-0x0000000000400000-0x00000000004D1000-memory.dmp

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