gcleaner | a75e90dafe1c1654c511fa5d01f5092a1bb3880b7b210689a910035425918f66

General

Target

a75e90dafe1c1654c511fa5d01f5092a1bb3880b7b210689a910035425918f66.exe
Size

434KB
MD5

1a29a0877e8cf4f655f11082d0298dc9
SHA1

f83aa10e5dd0600228c7ecd3e787e1dc1e24a5f1
SHA256

a75e90dafe1c1654c511fa5d01f5092a1bb3880b7b210689a910035425918f66
SHA512

3033bb7391371acc0f54a7b7dc72954f1a5caea4d55ed3a5f04807c8cca2193301f9581bf39c846afa1b81106025dcdbc84df67c37f2868bd4cd2669cfa582c7
SSDEEP

12288:GeSy7hLlys4W40FVHGZyrqXNqvgWw1Y90fuzOj:GkpMs4WnFQgNwC90G6j

Score

10^/10

gcleaner onlylogger discovery loader

Malware Config

Extracted

Family

gcleaner

C2

gcl-gb.biz

45.9.20.13

Signatures

GCleaner
GCleaner is a Pay-Per-Install malware loader first discovered in early 2019.
loader gcleaner
Gcleaner family
gcleaner
OnlyLogger
A tiny loader that uses IPLogger to get its payload.
loader onlylogger
Onlylogger family
onlylogger

OnlyLogger payload 5 IoCs

resource	yara_rule
behavioral2/memory/4068-2-0x0000000000970000-0x00000000009B9000-memory.dmp	family_onlylogger
behavioral2/memory/4068-3-0x0000000000400000-0x000000000044C000-memory.dmp	family_onlylogger
behavioral2/memory/4068-4-0x0000000000400000-0x000000000089C000-memory.dmp	family_onlylogger
behavioral2/memory/4068-6-0x0000000000400000-0x000000000044C000-memory.dmp	family_onlylogger
behavioral2/memory/4068-5-0x0000000000970000-0x00000000009B9000-memory.dmp	family_onlylogger

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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	a75e90dafe1c1654c511fa5d01f5092a1bb3880b7b210689a910035425918f66.exe

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

System Information Discovery
T1082

Program crash 7 IoCs

pid	pid_target	Process	procid_target
4832	4068	WerFault.exe	81
4540	4068	WerFault.exe	81
4568	4068	WerFault.exe	81
4624	4068	WerFault.exe	81
3096	4068	WerFault.exe	81
4860	4068	WerFault.exe	81
4940	4068	WerFault.exe	81

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	taskkill.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a75e90dafe1c1654c511fa5d01f5092a1bb3880b7b210689a910035425918f66.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
4808	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4808	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4068 wrote to memory of 2100	4068	a75e90dafe1c1654c511fa5d01f5092a1bb3880b7b210689a910035425918f66.exe	97
PID 4068 wrote to memory of 2100	4068	a75e90dafe1c1654c511fa5d01f5092a1bb3880b7b210689a910035425918f66.exe	97
PID 4068 wrote to memory of 2100	4068	a75e90dafe1c1654c511fa5d01f5092a1bb3880b7b210689a910035425918f66.exe	97
PID 2100 wrote to memory of 4808	2100	cmd.exe	101
PID 2100 wrote to memory of 4808	2100	cmd.exe	101
PID 2100 wrote to memory of 4808	2100	cmd.exe	101

C:\Users\Admin\AppData\Local\Temp\a75e90dafe1c1654c511fa5d01f5092a1bb3880b7b210689a910035425918f66.exe
"C:\Users\Admin\AppData\Local\Temp\a75e90dafe1c1654c511fa5d01f5092a1bb3880b7b210689a910035425918f66.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4068
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4068 -s 724
  2⤵
  - Program crash
  PID:4832
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4068 -s 784
  2⤵
  - Program crash
  PID:4540
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4068 -s 880
  2⤵
  - Program crash
  PID:4568
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4068 -s 784
  2⤵
  - Program crash
  PID:4624
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4068 -s 784
  2⤵
  - Program crash
  PID:3096
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4068 -s 968
  2⤵
  - Program crash
  PID:4860
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "a75e90dafe1c1654c511fa5d01f5092a1bb3880b7b210689a910035425918f66.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\a75e90dafe1c1654c511fa5d01f5092a1bb3880b7b210689a910035425918f66.exe" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2100
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "a75e90dafe1c1654c511fa5d01f5092a1bb3880b7b210689a910035425918f66.exe" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4808
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4068 -s 880
  2⤵
  - Program crash
  PID:4940

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4068 -ip 4068
1⤵
PID:4548

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 4068 -ip 4068
1⤵
PID:1048

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4068 -ip 4068
1⤵
PID:1924

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 4068 -ip 4068
1⤵
PID:860

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4068 -ip 4068
1⤵
PID:3092

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4068 -ip 4068
1⤵
PID:2700

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 4068 -ip 4068
1⤵
PID:2940

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/4068-1-0x0000000000BF0000-0x0000000000CF0000-memory.dmp

Filesize
1024KB

Download
memory/4068-2-0x0000000000970000-0x00000000009B9000-memory.dmp

Filesize
292KB

Download
memory/4068-3-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/4068-4-0x0000000000400000-0x000000000089C000-memory.dmp

Filesize
4.6MB

Download
memory/4068-6-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/4068-5-0x0000000000970000-0x00000000009B9000-memory.dmp

Filesize
292KB

Download

Analysis

Sharing