gcleaner | 855178b8283aa8176fa145f7ec4526e93a93d16d918e8fb4498b9cc772b0adf1

General

Target

855178b8283aa8176fa145f7ec4526e93a93d16d918e8fb4498b9cc772b0adf1.exe
Size

432KB
MD5

13b99c08710adb2280ce0cb40a06344a
SHA1

623836ea5867ce1b6198929c57a77b08ed0b1ce9
SHA256

855178b8283aa8176fa145f7ec4526e93a93d16d918e8fb4498b9cc772b0adf1
SHA512

d82fb528bdf1aa57440299a78c34ecc80984f050da4131cf14a40e2d66b679df7ee60265163c9925e00d057edc4fa9356bd1a817a708110e446e1a6dde2aa07f
SSDEEP

6144:j1TaPOEzf46bCPVvFvstUQsUjmFTjNEJpbfCtX8jLOK+lsO:BaGEzQ6bCPtKtlZhDbKtMub

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 10 IoCs

pid	pid_target	Process	procid_target
4400	2856	WerFault.exe	79
3584	2856	WerFault.exe	79
1636	2856	WerFault.exe	79
4988	2856	WerFault.exe	79
3428	2856	WerFault.exe	79
4640	2856	WerFault.exe	79
2712	2856	WerFault.exe	79
2264	2856	WerFault.exe	79
1500	2856	WerFault.exe	79
2212	2856	WerFault.exe	79

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	855178b8283aa8176fa145f7ec4526e93a93d16d918e8fb4498b9cc772b0adf1.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
1300	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1300	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2856 wrote to memory of 4512	2856	855178b8283aa8176fa145f7ec4526e93a93d16d918e8fb4498b9cc772b0adf1.exe	100
PID 2856 wrote to memory of 4512	2856	855178b8283aa8176fa145f7ec4526e93a93d16d918e8fb4498b9cc772b0adf1.exe	100
PID 2856 wrote to memory of 4512	2856	855178b8283aa8176fa145f7ec4526e93a93d16d918e8fb4498b9cc772b0adf1.exe	100
PID 4512 wrote to memory of 1300	4512	cmd.exe	104
PID 4512 wrote to memory of 1300	4512	cmd.exe	104
PID 4512 wrote to memory of 1300	4512	cmd.exe	104

C:\Users\Admin\AppData\Local\Temp\855178b8283aa8176fa145f7ec4526e93a93d16d918e8fb4498b9cc772b0adf1.exe
"C:\Users\Admin\AppData\Local\Temp\855178b8283aa8176fa145f7ec4526e93a93d16d918e8fb4498b9cc772b0adf1.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2856
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2856 -s 476
  2⤵
  - Program crash
  PID:4400
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2856 -s 500
  2⤵
  - Program crash
  PID:3584
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2856 -s 780
  2⤵
  - Program crash
  PID:1636
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2856 -s 800
  2⤵
  - Program crash
  PID:4988
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2856 -s 840
  2⤵
  - Program crash
  PID:3428
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2856 -s 896
  2⤵
  - Program crash
  PID:4640
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2856 -s 968
  2⤵
  - Program crash
  PID:2712
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2856 -s 1068
  2⤵
  - Program crash
  PID:2264
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2856 -s 1632
  2⤵
  - Program crash
  PID:1500
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "855178b8283aa8176fa145f7ec4526e93a93d16d918e8fb4498b9cc772b0adf1.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\855178b8283aa8176fa145f7ec4526e93a93d16d918e8fb4498b9cc772b0adf1.exe" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4512
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "855178b8283aa8176fa145f7ec4526e93a93d16d918e8fb4498b9cc772b0adf1.exe" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1300
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2856 -s 1584
  2⤵
  - Program crash
  PID:2212

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2856 -ip 2856
1⤵
PID:2200

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 2856 -ip 2856
1⤵
PID:4740

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 2856 -ip 2856
1⤵
PID:904

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 2856 -ip 2856
1⤵
PID:3640

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 356 -p 2856 -ip 2856
1⤵
PID:4188

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 2856 -ip 2856
1⤵
PID:2964

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 2856 -ip 2856
1⤵
PID:1564

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 2856 -ip 2856
1⤵
PID:3020

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 2856 -ip 2856
1⤵
PID:1424

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 2856 -ip 2856
1⤵
PID:4584

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\JL3S1NU9\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/2856-1-0x00000000026D0000-0x00000000027D0000-memory.dmp

Filesize
1024KB

Download
memory/2856-2-0x00000000042F0000-0x000000000432B000-memory.dmp

Filesize
236KB

Download
memory/2856-3-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/2856-8-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/2856-13-0x00000000026D0000-0x00000000027D0000-memory.dmp

Filesize
1024KB

Download
memory/2856-15-0x00000000042F0000-0x000000000432B000-memory.dmp

Filesize
236KB

Download
memory/2856-17-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/2856-16-0x0000000000400000-0x0000000002486000-memory.dmp

Filesize
32.5MB

Download
memory/2856-34-0x0000000000400000-0x0000000002486000-memory.dmp

Filesize
32.5MB

Download
memory/2856-36-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download

Analysis

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