gcleaner | 9b6bf6b18292879d45cbd5ed83ac14f088484299fcdcf5d382a2acf5e6887131

General

Target

9b6bf6b18292879d45cbd5ed83ac14f088484299fcdcf5d382a2acf5e6887131.exe
Size

3.1MB
MD5

1764990523d5dd6c063275abde06d3da
SHA1

fed5a57022bf7e25b5008b85b249c1046d28f6d0
SHA256

9b6bf6b18292879d45cbd5ed83ac14f088484299fcdcf5d382a2acf5e6887131
SHA512

b5f3aee2ef8e815ce20a0fa0ace3a1b8cedc6e01b9f0305702b619c6eb98e263c85c756b10869ada7b010ff5e25235d1cdd582a11b2656917cc37874afb0e9e9
SSDEEP

49152:amlQxq/9pIzOIlZKfB0rDM0GXCQuSJHC8zV:qc0l8WrzkCQugi0V

Score

10^/10

gcleaner loader

Malware Config

Extracted

Family

gcleaner

C2

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

Processes:

cmd.exe

pid process

1364 cmd.exe
Executes dropped EXE 1 IoCs

Processes:

FJSBG.exe

pid process

1332 FJSBG.exe
Loads dropped DLL 1 IoCs

Processes:

9b6bf6b18292879d45cbd5ed83ac14f088484299fcdcf5d382a2acf5e6887131.exe

pid process

1428 9b6bf6b18292879d45cbd5ed83ac14f088484299fcdcf5d382a2acf5e6887131.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

Processes:

taskkill.exe

pid process

1984 taskkill.exe

pid	process
1364	cmd.exe

pid	process
1332	FJSBG.exe

pid	process
1984	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

9b6bf6b18292879d45cbd5ed83ac14f088484299fcdcf5d382a2acf5e6887131.exe

pid	process
1428	9b6bf6b18292879d45cbd5ed83ac14f088484299fcdcf5d382a2acf5e6887131.exe
1428	9b6bf6b18292879d45cbd5ed83ac14f088484299fcdcf5d382a2acf5e6887131.exe
1428	9b6bf6b18292879d45cbd5ed83ac14f088484299fcdcf5d382a2acf5e6887131.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

taskkill.exe

description pid process

Token: SeDebugPrivilege 1984 taskkill.exe

description	pid	process
Token: SeDebugPrivilege	1984	taskkill.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

9b6bf6b18292879d45cbd5ed83ac14f088484299fcdcf5d382a2acf5e6887131.execmd.exe

description	pid	process	target process
PID 1428 wrote to memory of 1332	1428	9b6bf6b18292879d45cbd5ed83ac14f088484299fcdcf5d382a2acf5e6887131.exe	FJSBG.exe
PID 1428 wrote to memory of 1332	1428	9b6bf6b18292879d45cbd5ed83ac14f088484299fcdcf5d382a2acf5e6887131.exe	FJSBG.exe
PID 1428 wrote to memory of 1332	1428	9b6bf6b18292879d45cbd5ed83ac14f088484299fcdcf5d382a2acf5e6887131.exe	FJSBG.exe
PID 1428 wrote to memory of 1332	1428	9b6bf6b18292879d45cbd5ed83ac14f088484299fcdcf5d382a2acf5e6887131.exe	FJSBG.exe
PID 1428 wrote to memory of 1364	1428	9b6bf6b18292879d45cbd5ed83ac14f088484299fcdcf5d382a2acf5e6887131.exe	cmd.exe
PID 1428 wrote to memory of 1364	1428	9b6bf6b18292879d45cbd5ed83ac14f088484299fcdcf5d382a2acf5e6887131.exe	cmd.exe
PID 1428 wrote to memory of 1364	1428	9b6bf6b18292879d45cbd5ed83ac14f088484299fcdcf5d382a2acf5e6887131.exe	cmd.exe
PID 1428 wrote to memory of 1364	1428	9b6bf6b18292879d45cbd5ed83ac14f088484299fcdcf5d382a2acf5e6887131.exe	cmd.exe
PID 1364 wrote to memory of 1984	1364	cmd.exe	taskkill.exe
PID 1364 wrote to memory of 1984	1364	cmd.exe	taskkill.exe
PID 1364 wrote to memory of 1984	1364	cmd.exe	taskkill.exe
PID 1364 wrote to memory of 1984	1364	cmd.exe	taskkill.exe

C:\Users\Admin\AppData\Local\Temp\9b6bf6b18292879d45cbd5ed83ac14f088484299fcdcf5d382a2acf5e6887131.exe
"C:\Users\Admin\AppData\Local\Temp\9b6bf6b18292879d45cbd5ed83ac14f088484299fcdcf5d382a2acf5e6887131.exe"
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1428

C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\FJSBG.exe
2⤵
- Executes dropped EXE
PID:1332

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c taskkill /im "9b6bf6b18292879d45cbd5ed83ac14f088484299fcdcf5d382a2acf5e6887131.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\9b6bf6b18292879d45cbd5ed83ac14f088484299fcdcf5d382a2acf5e6887131.exe" & exit
2⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
PID:1364

C:\Windows\SysWOW64\taskkill.exe
taskkill /im "9b6bf6b18292879d45cbd5ed83ac14f088484299fcdcf5d382a2acf5e6887131.exe" /f
3⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1984

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\S7FIT0B8\dll[2].htm
Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\FJSBG.exe
Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\FJSBG.exe
Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1428-54-0x0000000000400000-0x0000000001514000-memory.dmp

Filesize
17.1MB

Download
memory/1428-55-0x0000000000400000-0x0000000001514000-memory.dmp

Filesize
17.1MB

Download
memory/1428-61-0x0000000000400000-0x0000000001514000-memory.dmp

Filesize
17.1MB

Download
memory/1428-68-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1428-72-0x0000000000400000-0x0000000001514000-memory.dmp

Filesize
17.1MB

Download
memory/1428-88-0x0000000000400000-0x0000000001514000-memory.dmp

Filesize
17.1MB

Download

Analysis

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