gcleaner | 626da43e5e9f4209332a9f0f7ad3680084e5aa481c71bc1ff6d299ac77fb0d75

Analysis

max time kernel
58s
max time network
61s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
12/03/2023, 22:21

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General

Target
06b0a5bee593079754ec299aa900b9b3.exe
Size 3.1MB
Sample230312-19mmrsff49
SHA256 626da43e5e9f4209332a9f0f7ad3680084e5aa481c71bc1ff6d299ac77fb0d75
MD5 06b0a5bee593079754ec299aa900b9b3
SHA1 942bb557466e2fc08b478fee97d14ab2756591bc
SHA512 04ab027c2c4b31ae3fc699ce3a8f7f08aa54bcedd0198c2471f8afbe320b6e35ecece69cbe9f5e358ff02f1b02758f86965cb0a8592c553848e9cac5a878d207
SSDEEP 49152:TFuEcgU4vR2a8vl2zrbCWLAWrcBGZmeVL0aPrQ3zvX/:3vYl2+WprcBImeN0aPrQ3zv
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

gcleaner 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

Deletes itself 1 IoCs

pid	Process
1436	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
936	FKWIow.exe

Loads dropped DLL 1 IoCs

pid	Process
2044	06b0a5bee593079754ec299aa900b9b3.exe

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
1552	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2044	06b0a5bee593079754ec299aa900b9b3.exe
2044	06b0a5bee593079754ec299aa900b9b3.exe
2044	06b0a5bee593079754ec299aa900b9b3.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1552	taskkill.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2044 wrote to memory of 936	2044	06b0a5bee593079754ec299aa900b9b3.exe	28
PID 2044 wrote to memory of 936	2044	06b0a5bee593079754ec299aa900b9b3.exe	28
PID 2044 wrote to memory of 936	2044	06b0a5bee593079754ec299aa900b9b3.exe	28
PID 2044 wrote to memory of 936	2044	06b0a5bee593079754ec299aa900b9b3.exe	28
PID 2044 wrote to memory of 1436	2044	06b0a5bee593079754ec299aa900b9b3.exe	31
PID 2044 wrote to memory of 1436	2044	06b0a5bee593079754ec299aa900b9b3.exe	31
PID 2044 wrote to memory of 1436	2044	06b0a5bee593079754ec299aa900b9b3.exe	31
PID 2044 wrote to memory of 1436	2044	06b0a5bee593079754ec299aa900b9b3.exe	31
PID 1436 wrote to memory of 1552	1436	cmd.exe	33
PID 1436 wrote to memory of 1552	1436	cmd.exe	33
PID 1436 wrote to memory of 1552	1436	cmd.exe	33
PID 1436 wrote to memory of 1552	1436	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\06b0a5bee593079754ec299aa900b9b3.exe
"C:\Users\Admin\AppData\Local\Temp\06b0a5bee593079754ec299aa900b9b3.exe"
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2044
- C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\FKWIow.exe
  2⤵
  - Executes dropped EXE
  PID:936
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "06b0a5bee593079754ec299aa900b9b3.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\06b0a5bee593079754ec299aa900b9b3.exe" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1436
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "06b0a5bee593079754ec299aa900b9b3.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1552

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

dll[2].htm

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\TOS3MI7U\dll[2].htm
Size 1B
SHA256 5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9
MD5 cfcd208495d565ef66e7dff9f98764da
SHA1 b6589fc6ab0dc82cf12099d1c2d40ab994e8410c
SHA512 31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99
MD5 SHA1 SHA512

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FKWIow.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\FKWIow.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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FKWIow.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\FKWIow.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/2044-54-0x0000000000400000-0x0000000001514000-memory.dmp

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memory/2044-55-0x0000000000400000-0x0000000001514000-memory.dmp

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memory/2044-61-0x0000000000400000-0x0000000001514000-memory.dmp

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memory/2044-65-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2044-70-0x0000000000400000-0x0000000001514000-memory.dmp

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memory/2044-83-0x0000000000400000-0x0000000001514000-memory.dmp

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