gcleaner | ff3953d92d4a556d217f8f9f1f060e03f5709e965e4e0db5ec546c1eef0664ad

General

Target

b631035b2db41d9ff52558a5ad67c590N.exe
Size

284KB
MD5

b631035b2db41d9ff52558a5ad67c590
SHA1

36d8eeaca6e6d3b6145ba8283cf1096bb5cb0c36
SHA256

ff3953d92d4a556d217f8f9f1f060e03f5709e965e4e0db5ec546c1eef0664ad
SHA512

b53bc2ccf4818f3f18589e13d2cdedb09f7dad3ad40b66a094f77f9ed07fb9a2af5fbde197d0ee4d36c951a12260f6c1f06542ce89ebb7b1ae7775a873163bf1
SSDEEP

3072:ILX6g2KfE5QcSR7mg51KxdaZ7+TzMwyn93YkUeEMVqEW2m9JUZLuQTdzZ/pUNY0N:ILX6g2oE5QcLna8Eb9vYyuQTdJ6Nnd

Score

10^/10

gcleaner discovery loader

Malware Config

Extracted

Family

gcleaner

C2

80.66.75.114

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-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation	b631035b2db41d9ff52558a5ad67c590N.exe

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

System Information Discovery
T1082

Program crash 8 IoCs

pid	pid_target	Process	procid_target
116	3580	WerFault.exe	82
3664	3580	WerFault.exe	82
4652	3580	WerFault.exe	82
3940	3580	WerFault.exe	82
4852	3580	WerFault.exe	82
1556	3580	WerFault.exe	82
3364	3580	WerFault.exe	82
764	3580	WerFault.exe	82

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	taskkill.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b631035b2db41d9ff52558a5ad67c590N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
3832	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3832	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3580 wrote to memory of 4752	3580	b631035b2db41d9ff52558a5ad67c590N.exe	108
PID 3580 wrote to memory of 4752	3580	b631035b2db41d9ff52558a5ad67c590N.exe	108
PID 3580 wrote to memory of 4752	3580	b631035b2db41d9ff52558a5ad67c590N.exe	108
PID 4752 wrote to memory of 3832	4752	cmd.exe	112
PID 4752 wrote to memory of 3832	4752	cmd.exe	112
PID 4752 wrote to memory of 3832	4752	cmd.exe	112

C:\Users\Admin\AppData\Local\Temp\b631035b2db41d9ff52558a5ad67c590N.exe
"C:\Users\Admin\AppData\Local\Temp\b631035b2db41d9ff52558a5ad67c590N.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3580
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3580 -s 740
  2⤵
  - Program crash
  PID:116
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3580 -s 784
  2⤵
  - Program crash
  PID:3664
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3580 -s 784
  2⤵
  - Program crash
  PID:4652
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3580 -s 812
  2⤵
  - Program crash
  PID:3940
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3580 -s 904
  2⤵
  - Program crash
  PID:4852
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3580 -s 980
  2⤵
  - Program crash
  PID:1556
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3580 -s 1412
  2⤵
  - Program crash
  PID:3364
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "b631035b2db41d9ff52558a5ad67c590N.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\b631035b2db41d9ff52558a5ad67c590N.exe" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4752
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "b631035b2db41d9ff52558a5ad67c590N.exe" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3832
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3580 -s 1440
  2⤵
  - Program crash
  PID:764

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 3580 -ip 3580
1⤵
PID:3560

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 3580 -ip 3580
1⤵
PID:628

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 3580 -ip 3580
1⤵
PID:2312

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 3580 -ip 3580
1⤵
PID:4544

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 3580 -ip 3580
1⤵
PID:3916

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 3580 -ip 3580
1⤵
PID:1948

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 3580 -ip 3580
1⤵
PID:2572

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 3580 -ip 3580
1⤵
PID:1076

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

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\2VX66VOV\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/3580-1-0x0000000002D90000-0x0000000002E90000-memory.dmp

Filesize
1024KB

Download
memory/3580-2-0x0000000002D10000-0x0000000002D3D000-memory.dmp

Filesize
180KB

Download
memory/3580-3-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3580-8-0x0000000002D90000-0x0000000002E90000-memory.dmp

Filesize
1024KB

Download
memory/3580-9-0x0000000000400000-0x0000000002B67000-memory.dmp

Filesize
39.4MB

Download
memory/3580-11-0x0000000002D10000-0x0000000002D3D000-memory.dmp

Filesize
180KB

Download
memory/3580-12-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3580-22-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3580-21-0x0000000000400000-0x0000000002B67000-memory.dmp

Filesize
39.4MB

Download

Analysis

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