gcleaner | 639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b

General

Target

639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.exe
Size

299KB
MD5

929e1c4d7de071ef5aeb9fd2b2e7813e
SHA1

41e4b840c194823726fef12ea987f8d1a8d7591b
SHA256

639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b
SHA512

84c5c1fbb03f64683b48f6e0de9fed851b45f2a9a95ea7149c02b3ba5f7ac7ac6be707c708ff3c473dc125e5588c95ab96bd088c22c487af2681d2e0d75eedcf
SSDEEP

6144:XfH/KjXTSNEfLd7zGHdNXc8w82puOjYZ:PH/KjjSNENzeNXz8pu0Y

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	639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.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
4972	4124	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	639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.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
1796	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1796	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4124 wrote to memory of 3808	4124	639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.exe	97
PID 4124 wrote to memory of 3808	4124	639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.exe	97
PID 4124 wrote to memory of 3808	4124	639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.exe	97
PID 3808 wrote to memory of 1796	3808	cmd.exe	101
PID 3808 wrote to memory of 1796	3808	cmd.exe	101
PID 3808 wrote to memory of 1796	3808	cmd.exe	101

C:\Users\Admin\AppData\Local\Temp\639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.exe
"C:\Users\Admin\AppData\Local\Temp\639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4124
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.exe" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3808
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.exe" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1796
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4124 -s 1692
  2⤵
  - Program crash
  PID:4972

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4124 -ip 4124
1⤵
PID:768

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/4124-1-0x0000000000540000-0x0000000000640000-memory.dmp

Filesize
1024KB

Download
memory/4124-2-0x00000000004F0000-0x000000000052B000-memory.dmp

Filesize
236KB

Download
memory/4124-3-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/4124-8-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/4124-13-0x0000000000540000-0x0000000000640000-memory.dmp

Filesize
1024KB

Download
memory/4124-15-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/4124-16-0x00000000004F0000-0x000000000052B000-memory.dmp

Filesize
236KB

Download
memory/4124-18-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/4124-29-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/4124-35-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/4124-36-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download

Analysis

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