gcleaner | a76b0034b5dc727262b84b5eef2e473591fd293eb6d46767821ac745f45eaa8f

General

Target

a76b0034b5dc727262b84b5eef2e473591fd293eb6d46767821ac745f45eaa8f.exe
Size

384KB
MD5

6cab85940aac23cfda0fc509eca9ac91
SHA1

1ceaa34f98e1895a0cf4835c559cd43154022476
SHA256

a76b0034b5dc727262b84b5eef2e473591fd293eb6d46767821ac745f45eaa8f
SHA512

0d48ab61231305ccced1b0167412f9ab9969dcfae80d99b2571696a8df867f7b207b7c627dfb44998385da935a9b1f081b04d771858e9e650ca54bd1cce3bdfd
SSDEEP

6144:sEfnGfh6eQgRyYgUXGIKdTuGBpyfniUp9g9xvWPdBTaTUmPbQf:s4nGfkeQ24yGIyZBKniyyxvaJWb

Score

10^/10

gcleaner discovery loader

Malware Config

Extracted

Family

gcleaner

C2

80.66.75.114

45.91.200.135

Signatures

GCleaner
GCleaner is a Pay-Per-Install malware loader first discovered in early 2019.
loader gcleaner
Downloads MZ/PE file
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 9 IoCs

pid	pid_target	Process	procid_target
1496	1476	WerFault.exe	77
3392	1476	WerFault.exe	77
3192	1476	WerFault.exe	77
2456	1476	WerFault.exe	77
4752	1476	WerFault.exe	77
1172	1476	WerFault.exe	77
3680	1476	WerFault.exe	77
2560	1476	WerFault.exe	77
4588	1476	WerFault.exe	77

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	a76b0034b5dc727262b84b5eef2e473591fd293eb6d46767821ac745f45eaa8f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	taskkill.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
4604	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4604	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1476 wrote to memory of 4756	1476	a76b0034b5dc727262b84b5eef2e473591fd293eb6d46767821ac745f45eaa8f.exe	95
PID 1476 wrote to memory of 4756	1476	a76b0034b5dc727262b84b5eef2e473591fd293eb6d46767821ac745f45eaa8f.exe	95
PID 1476 wrote to memory of 4756	1476	a76b0034b5dc727262b84b5eef2e473591fd293eb6d46767821ac745f45eaa8f.exe	95
PID 4756 wrote to memory of 4604	4756	cmd.exe	99
PID 4756 wrote to memory of 4604	4756	cmd.exe	99
PID 4756 wrote to memory of 4604	4756	cmd.exe	99

C:\Users\Admin\AppData\Local\Temp\a76b0034b5dc727262b84b5eef2e473591fd293eb6d46767821ac745f45eaa8f.exe
"C:\Users\Admin\AppData\Local\Temp\a76b0034b5dc727262b84b5eef2e473591fd293eb6d46767821ac745f45eaa8f.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1476
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1476 -s 476
  2⤵
  - Program crash
  PID:1496
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1476 -s 796
  2⤵
  - Program crash
  PID:3392
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1476 -s 816
  2⤵
  - Program crash
  PID:3192
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1476 -s 796
  2⤵
  - Program crash
  PID:2456
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1476 -s 868
  2⤵
  - Program crash
  PID:4752
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1476 -s 976
  2⤵
  - Program crash
  PID:1172
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1476 -s 1084
  2⤵
  - Program crash
  PID:3680
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1476 -s 1648
  2⤵
  - Program crash
  PID:2560
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "a76b0034b5dc727262b84b5eef2e473591fd293eb6d46767821ac745f45eaa8f.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\a76b0034b5dc727262b84b5eef2e473591fd293eb6d46767821ac745f45eaa8f.exe" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4756
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "a76b0034b5dc727262b84b5eef2e473591fd293eb6d46767821ac745f45eaa8f.exe" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4604
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1476 -s 1752
  2⤵
  - Program crash
  PID:4588

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1476 -ip 1476
1⤵
PID:2116

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 1476 -ip 1476
1⤵
PID:1820

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 1476 -ip 1476
1⤵
PID:1796

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 1476 -ip 1476
1⤵
PID:3812

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 1476 -ip 1476
1⤵
PID:1972

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 1476 -ip 1476
1⤵
PID:616

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 484 -p 1476 -ip 1476
1⤵
PID:820

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 1476 -ip 1476
1⤵
PID:4280

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 1476 -ip 1476
1⤵
PID:4976

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

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\LQOABF8X\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/1476-1-0x0000000002720000-0x0000000002820000-memory.dmp

Filesize
1024KB

Download
memory/1476-2-0x00000000026E0000-0x000000000271B000-memory.dmp

Filesize
236KB

Download
memory/1476-3-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1476-8-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/1476-13-0x0000000002720000-0x0000000002820000-memory.dmp

Filesize
1024KB

Download
memory/1476-15-0x00000000026E0000-0x000000000271B000-memory.dmp

Filesize
236KB

Download
memory/1476-17-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1476-16-0x0000000000400000-0x0000000002478000-memory.dmp

Filesize
32.5MB

Download
memory/1476-34-0x0000000000400000-0x0000000002478000-memory.dmp

Filesize
32.5MB

Download
memory/1476-36-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1476-35-0x0000000000400000-0x0000000002478000-memory.dmp

Filesize
32.5MB

Download

Analysis

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