gcleaner | 266b61c654cee4fcb0221f72d26e37343fef76aafcee1f6ccc1581dd052e2cf5

General

Target

266b61c654cee4fcb0221f72d26e37343fef76aafcee1f6ccc1581dd052e2cf5.exe
Size

325KB
MD5

539c130a606b9b789a7c894f1332c274
SHA1

4883afe6a383e82aaa7846c9995df10f4b746672
SHA256

266b61c654cee4fcb0221f72d26e37343fef76aafcee1f6ccc1581dd052e2cf5
SHA512

c924d3aa7be0afd5b220d6351a86eda46821bb0a5e394fb3a591b25a3e22045c8d15c7bf680f87c724459879552e1297c8ed8065ad3e838b58893a4bb0a85d0c
SSDEEP

6144:vfb1r7ArF9KkLE+mE3ZSn1/hAIS2ZFvcEHo+uQTdJ91L:3bZArF9Ge8n1/hAkZl3ZhdJ9V

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-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	266b61c654cee4fcb0221f72d26e37343fef76aafcee1f6ccc1581dd052e2cf5.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
3052	4240	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	266b61c654cee4fcb0221f72d26e37343fef76aafcee1f6ccc1581dd052e2cf5.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
2768	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2768	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4240 wrote to memory of 2496	4240	266b61c654cee4fcb0221f72d26e37343fef76aafcee1f6ccc1581dd052e2cf5.exe	96
PID 4240 wrote to memory of 2496	4240	266b61c654cee4fcb0221f72d26e37343fef76aafcee1f6ccc1581dd052e2cf5.exe	96
PID 4240 wrote to memory of 2496	4240	266b61c654cee4fcb0221f72d26e37343fef76aafcee1f6ccc1581dd052e2cf5.exe	96
PID 2496 wrote to memory of 2768	2496	cmd.exe	100
PID 2496 wrote to memory of 2768	2496	cmd.exe	100
PID 2496 wrote to memory of 2768	2496	cmd.exe	100

C:\Users\Admin\AppData\Local\Temp\266b61c654cee4fcb0221f72d26e37343fef76aafcee1f6ccc1581dd052e2cf5.exe
"C:\Users\Admin\AppData\Local\Temp\266b61c654cee4fcb0221f72d26e37343fef76aafcee1f6ccc1581dd052e2cf5.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4240
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "266b61c654cee4fcb0221f72d26e37343fef76aafcee1f6ccc1581dd052e2cf5.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\266b61c654cee4fcb0221f72d26e37343fef76aafcee1f6ccc1581dd052e2cf5.exe" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2496
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "266b61c654cee4fcb0221f72d26e37343fef76aafcee1f6ccc1581dd052e2cf5.exe" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2768
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4240 -s 1680
  2⤵
  - Program crash
  PID:3052

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4240 -ip 4240
1⤵
PID:4820

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\VNN58CU3\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/4240-1-0x0000000002C30000-0x0000000002D30000-memory.dmp

Filesize
1024KB

Download
memory/4240-2-0x00000000048B0000-0x00000000048EB000-memory.dmp

Filesize
236KB

Download
memory/4240-3-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/4240-8-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/4240-13-0x0000000002C30000-0x0000000002D30000-memory.dmp

Filesize
1024KB

Download
memory/4240-14-0x0000000000400000-0x0000000002B72000-memory.dmp

Filesize
39.4MB

Download
memory/4240-16-0x00000000048B0000-0x00000000048EB000-memory.dmp

Filesize
236KB

Download
memory/4240-17-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/4240-36-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/4240-35-0x0000000000400000-0x0000000002B72000-memory.dmp

Filesize
39.4MB

Download

Analysis

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