gcleaner | 0c5789417d3d30ec72050cd456c8d46e5239ec9744f3db60fcc25e3725dc4228

General

Target

bd6938a3e6bfd792f546742d669b6157.exe
Size

4.5MB
MD5

bd6938a3e6bfd792f546742d669b6157
SHA1

9a69167c0d4d32ef6660faaa8ef6244ace7b29d9
SHA256

0c5789417d3d30ec72050cd456c8d46e5239ec9744f3db60fcc25e3725dc4228
SHA512

2fc768ff242ce51743c2ad9988f3e82bf8211d27926a8b134b3a938fcbe23c64c837668e9744ef450e663719972bd864e3d28e614403c97746172e4bc6f627ed
SSDEEP

98304:LIj07OvfaLdcWM4tNZ6lVGlY4l9bNfpIt1xiMyf8NzkkpO+guem/:LClKhc+IreYenfpIt1xiMyfkJ/

Score

10^/10

gcleaner defense_evasion discovery loader

Malware Config

Extracted

Family

gcleaner

C2

185.156.73.73

Signatures

GCleaner
GCleaner is a Pay-Per-Install malware loader first discovered in early 2019.
loader gcleaner
Gcleaner family
gcleaner

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs

defense_evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	bd6938a3e6bfd792f546742d669b6157.exe

Downloads MZ/PE file 1 IoCs

flow	pid	Process
3	2668	BitLockerToGo.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	bd6938a3e6bfd792f546742d669b6157.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	bd6938a3e6bfd792f546742d669b6157.exe

Identifies Wine through registry keys 2 TTPs 1 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

defense_evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2039016743-699959520-214465309-1000\Software\Wine	bd6938a3e6bfd792f546742d669b6157.exe

Loads dropped DLL 1 IoCs

pid	Process
2668	BitLockerToGo.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2716	bd6938a3e6bfd792f546742d669b6157.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2716 set thread context of 2668	2716	bd6938a3e6bfd792f546742d669b6157.exe	30

System Location Discovery: System Language Discovery 1 TTPs 2 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	bd6938a3e6bfd792f546742d669b6157.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BitLockerToGo.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2716	bd6938a3e6bfd792f546742d669b6157.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2716 wrote to memory of 2668	2716	bd6938a3e6bfd792f546742d669b6157.exe	30
PID 2716 wrote to memory of 2668	2716	bd6938a3e6bfd792f546742d669b6157.exe	30
PID 2716 wrote to memory of 2668	2716	bd6938a3e6bfd792f546742d669b6157.exe	30
PID 2716 wrote to memory of 2668	2716	bd6938a3e6bfd792f546742d669b6157.exe	30
PID 2716 wrote to memory of 2668	2716	bd6938a3e6bfd792f546742d669b6157.exe	30
PID 2716 wrote to memory of 2668	2716	bd6938a3e6bfd792f546742d669b6157.exe	30
PID 2716 wrote to memory of 2668	2716	bd6938a3e6bfd792f546742d669b6157.exe	30
PID 2716 wrote to memory of 2668	2716	bd6938a3e6bfd792f546742d669b6157.exe	30
PID 2716 wrote to memory of 2668	2716	bd6938a3e6bfd792f546742d669b6157.exe	30
PID 2716 wrote to memory of 2668	2716	bd6938a3e6bfd792f546742d669b6157.exe	30
PID 2716 wrote to memory of 2668	2716	bd6938a3e6bfd792f546742d669b6157.exe	30

C:\Users\Admin\AppData\Local\Temp\bd6938a3e6bfd792f546742d669b6157.exe
"C:\Users\Admin\AppData\Local\Temp\bd6938a3e6bfd792f546742d669b6157.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2716
- C:\Windows\BitLockerDiscoveryVolumeContents\BitLockerToGo.exe
  "C:\Windows\BitLockerDiscoveryVolumeContents\BitLockerToGo.exe"
  2⤵
  - Downloads MZ/PE file
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  PID:2668

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Virtualization/Sandbox Evasion

2

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\5GWW47WY\service[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
\Users\Admin\AppData\Local\Temp\F0EwJEDZwE5e46f\Y-Cleaner.exe

Filesize
987KB

MD5
f49d1aaae28b92052e997480c504aa3b

SHA1
a422f6403847405cee6068f3394bb151d8591fb5

SHA256
81e31780a5f2078284b011c720261797eb8dd85e1b95a657dbce7ac31e9df1f0

SHA512
41f715eea031fd8d7d3a22d88e0199277db2f86be73f830819288c0f0665e81a314be6d356fdc66069cb3f2abf0dd02aaa49ac3732f3f44a533fcec0dfd6f773

Download Submit
memory/2668-9-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2668-41-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2668-25-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2668-18-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/2668-10-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2668-12-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2668-13-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2716-4-0x0000000001240000-0x0000000001E76000-memory.dmp

Filesize
12.2MB

Download
memory/2716-8-0x0000000001240000-0x0000000001E76000-memory.dmp

Filesize
12.2MB

Download
memory/2716-14-0x0000000001240000-0x0000000001E76000-memory.dmp

Filesize
12.2MB

Download
memory/2716-7-0x0000000001240000-0x0000000001E76000-memory.dmp

Filesize
12.2MB

Download
memory/2716-6-0x0000000001240000-0x0000000001E76000-memory.dmp

Filesize
12.2MB

Download
memory/2716-5-0x0000000001240000-0x0000000001E76000-memory.dmp

Filesize
12.2MB

Download
memory/2716-0-0x0000000001240000-0x0000000001E76000-memory.dmp

Filesize
12.2MB

Download
memory/2716-3-0x0000000001240000-0x0000000001E76000-memory.dmp

Filesize
12.2MB

Download
memory/2716-2-0x0000000001241000-0x00000000014F7000-memory.dmp

Filesize
2.7MB

Download
memory/2716-1-0x0000000077E70000-0x0000000077E72000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads