gcleaner | a8acd63bcabc56235e7dd16b87e2a5b690b0915ecb052059c82e546b066b0659

General

Target

a8acd63bcabc56235e7dd16b87e2a5b690b0915ecb052059c82e546b066b0659.exe
Size

322KB
MD5

516768e4e704738daeb061306e17a4f9
SHA1

5b3684f84b9ccca478ead16325c3bc64a54a052c
SHA256

a8acd63bcabc56235e7dd16b87e2a5b690b0915ecb052059c82e546b066b0659
SHA512

81d4fb47d56be265eb2299b2e605ff53e30ed15d49df30d7996b1638414794306be703774d92e375e37082f63762fbde940f3bedc4e6b26640f1f94774e54f5f
SSDEEP

6144:hfb13/MHFWJBv+vAYGueisx6OOxbdbWuQTdJuIMp7:JbBMHFW3vvN6BxBWhdJKp7

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

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-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	a8acd63bcabc56235e7dd16b87e2a5b690b0915ecb052059c82e546b066b0659.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2952	2388	WerFault.exe	85

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	a8acd63bcabc56235e7dd16b87e2a5b690b0915ecb052059c82e546b066b0659.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
3184	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3184	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2388 wrote to memory of 2180	2388	a8acd63bcabc56235e7dd16b87e2a5b690b0915ecb052059c82e546b066b0659.exe	98
PID 2388 wrote to memory of 2180	2388	a8acd63bcabc56235e7dd16b87e2a5b690b0915ecb052059c82e546b066b0659.exe	98
PID 2388 wrote to memory of 2180	2388	a8acd63bcabc56235e7dd16b87e2a5b690b0915ecb052059c82e546b066b0659.exe	98
PID 2180 wrote to memory of 3184	2180	cmd.exe	102
PID 2180 wrote to memory of 3184	2180	cmd.exe	102
PID 2180 wrote to memory of 3184	2180	cmd.exe	102

C:\Users\Admin\AppData\Local\Temp\a8acd63bcabc56235e7dd16b87e2a5b690b0915ecb052059c82e546b066b0659.exe
"C:\Users\Admin\AppData\Local\Temp\a8acd63bcabc56235e7dd16b87e2a5b690b0915ecb052059c82e546b066b0659.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2388
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "a8acd63bcabc56235e7dd16b87e2a5b690b0915ecb052059c82e546b066b0659.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\a8acd63bcabc56235e7dd16b87e2a5b690b0915ecb052059c82e546b066b0659.exe" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2180
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "a8acd63bcabc56235e7dd16b87e2a5b690b0915ecb052059c82e546b066b0659.exe" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3184
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2388 -s 1752
  2⤵
  - Program crash
  PID:2952

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 2388 -ip 2388
1⤵
PID:4512

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\ZK5NPJWQ\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/2388-1-0x0000000002EB0000-0x0000000002FB0000-memory.dmp

Filesize
1024KB

Download
memory/2388-2-0x0000000002E20000-0x0000000002E5B000-memory.dmp

Filesize
236KB

Download
memory/2388-3-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/2388-8-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/2388-12-0x0000000002EB0000-0x0000000002FB0000-memory.dmp

Filesize
1024KB

Download
memory/2388-14-0x0000000000400000-0x0000000002B71000-memory.dmp

Filesize
39.4MB

Download
memory/2388-15-0x0000000002E20000-0x0000000002E5B000-memory.dmp

Filesize
236KB

Download
memory/2388-17-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/2388-28-0x0000000000400000-0x0000000002B71000-memory.dmp

Filesize
39.4MB

Download
memory/2388-37-0x0000000000400000-0x0000000002B71000-memory.dmp

Filesize
39.4MB

Download
memory/2388-39-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download

Analysis

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