gcleaner | a97aa9ce4c61d2767808f1e6cc7f6c18a4199b0655afc1083a70caca01544864

General

Target

a97aa9ce4c61d2767808f1e6cc7f6c18a4199b0655afc1083a70caca01544864.exe
Size

324KB
MD5

d9af11a36b5e8641669ad4fb3bf42631
SHA1

1470c852d6600088473b89873fb2eb5bf728c2e1
SHA256

a97aa9ce4c61d2767808f1e6cc7f6c18a4199b0655afc1083a70caca01544864
SHA512

f6edc42673d1a3b70ad7e9c1130a92b30fd8f3b00ff6e1499205f7a19a0c7c51534bb728be8bc8514f7a8860f378d77ebea41fb5756dc6df228268920f73aa87
SSDEEP

6144:ufHGs1p91pE8y2C3Eotoaz/OwC3YgaJ2rrdVpoF/Q:aHx1p9TqR+azGfYgTJS/

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 11 IoCs

pid	pid_target	Process	procid_target
2216	2536	WerFault.exe	79
2952	2536	WerFault.exe	79
2472	2536	WerFault.exe	79
736	2536	WerFault.exe	79
4524	2536	WerFault.exe	79
2136	2536	WerFault.exe	79
2788	2536	WerFault.exe	79
3344	2536	WerFault.exe	79
3012	2536	WerFault.exe	79
956	2536	WerFault.exe	79
1900	2536	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	a97aa9ce4c61d2767808f1e6cc7f6c18a4199b0655afc1083a70caca01544864.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
3820	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3820	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2536 wrote to memory of 3280	2536	a97aa9ce4c61d2767808f1e6cc7f6c18a4199b0655afc1083a70caca01544864.exe	103
PID 2536 wrote to memory of 3280	2536	a97aa9ce4c61d2767808f1e6cc7f6c18a4199b0655afc1083a70caca01544864.exe	103
PID 2536 wrote to memory of 3280	2536	a97aa9ce4c61d2767808f1e6cc7f6c18a4199b0655afc1083a70caca01544864.exe	103
PID 3280 wrote to memory of 3820	3280	cmd.exe	107
PID 3280 wrote to memory of 3820	3280	cmd.exe	107
PID 3280 wrote to memory of 3820	3280	cmd.exe	107

C:\Users\Admin\AppData\Local\Temp\a97aa9ce4c61d2767808f1e6cc7f6c18a4199b0655afc1083a70caca01544864.exe
"C:\Users\Admin\AppData\Local\Temp\a97aa9ce4c61d2767808f1e6cc7f6c18a4199b0655afc1083a70caca01544864.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2536
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2536 -s 480
  2⤵
  - Program crash
  PID:2216
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2536 -s 484
  2⤵
  - Program crash
  PID:2952
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2536 -s 788
  2⤵
  - Program crash
  PID:2472
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2536 -s 780
  2⤵
  - Program crash
  PID:736
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2536 -s 780
  2⤵
  - Program crash
  PID:4524
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2536 -s 852
  2⤵
  - Program crash
  PID:2136
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2536 -s 960
  2⤵
  - Program crash
  PID:2788
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2536 -s 968
  2⤵
  - Program crash
  PID:3344
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2536 -s 1096
  2⤵
  - Program crash
  PID:3012
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2536 -s 1740
  2⤵
  - Program crash
  PID:956
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "a97aa9ce4c61d2767808f1e6cc7f6c18a4199b0655afc1083a70caca01544864.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\a97aa9ce4c61d2767808f1e6cc7f6c18a4199b0655afc1083a70caca01544864.exe" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3280
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "a97aa9ce4c61d2767808f1e6cc7f6c18a4199b0655afc1083a70caca01544864.exe" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3820
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2536 -s 1440
  2⤵
  - Program crash
  PID:1900

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2536 -ip 2536
1⤵
PID:3140

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 2536 -ip 2536
1⤵
PID:1208

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 2536 -ip 2536
1⤵
PID:3740

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 2536 -ip 2536
1⤵
PID:3484

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 2536 -ip 2536
1⤵
PID:3064

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2536 -ip 2536
1⤵
PID:3260

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 2536 -ip 2536
1⤵
PID:696

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2536 -ip 2536
1⤵
PID:1872

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2536 -ip 2536
1⤵
PID:2160

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 2536 -ip 2536
1⤵
PID:1160

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2536 -ip 2536
1⤵
PID:3232

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\WC3VGW7B\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/2536-1-0x00000000004E0000-0x00000000005E0000-memory.dmp

Filesize
1024KB

Download
memory/2536-2-0x00000000022A0000-0x00000000022DB000-memory.dmp

Filesize
236KB

Download
memory/2536-3-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/2536-7-0x00000000004E0000-0x00000000005E0000-memory.dmp

Filesize
1024KB

Download
memory/2536-8-0x0000000000400000-0x0000000000458000-memory.dmp

Filesize
352KB

Download
memory/2536-9-0x00000000022A0000-0x00000000022DB000-memory.dmp

Filesize
236KB

Download
memory/2536-10-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/2536-13-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/2536-32-0x0000000000400000-0x0000000000458000-memory.dmp

Filesize
352KB

Download
memory/2536-40-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/2536-39-0x0000000000400000-0x0000000000458000-memory.dmp

Filesize
352KB

Download

Analysis

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