gcleaner | d6a8314853b4ef689f1f4531f575af9e6335425fbede36bde7d7f15d445bb624

General

Target

random.exe
Size

5.8MB
MD5

984c4780f3443a5870fee13124382112
SHA1

b1efa178ee3002c42def2ad27a014e5ebce86e17
SHA256

d6a8314853b4ef689f1f4531f575af9e6335425fbede36bde7d7f15d445bb624
SHA512

1d16aef6869b683cd962169f9f459b83f74d385ac6dbf983987a98a42d0ab8f6cbfbd782d1781de56a53e1a1cfe4a45f44d02b8e91b3feda97d58785bb0d6b86
SSDEEP

98304:iI0C6A0IsUAlbANVrWVI5IdpsPbQ313J8U1rB5h4vmQnIOE6MuTmZ3Pmff:iI0/IsUAti9NqdU08IB5hImQn66M1Pm

Score

10^/10

gcleaner defense_evasion discovery loader

Malware Config

Extracted

Family

gcleaner

C2

185.156.73.23

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__	random.exe

Downloads MZ/PE file 1 IoCs

flow	pid	Process
1	3732	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	random.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	random.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-1-5-21-189444705-1272902858-1305688695-1000\Software\Wine	random.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
4716	random.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4716 set thread context of 3732	4716	random.exe	80

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	random.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BitLockerToGo.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4716	random.exe
4716	random.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4716 wrote to memory of 3732	4716	random.exe	80
PID 4716 wrote to memory of 3732	4716	random.exe	80
PID 4716 wrote to memory of 3732	4716	random.exe	80
PID 4716 wrote to memory of 3732	4716	random.exe	80
PID 4716 wrote to memory of 3732	4716	random.exe	80
PID 4716 wrote to memory of 3732	4716	random.exe	80
PID 4716 wrote to memory of 3732	4716	random.exe	80
PID 4716 wrote to memory of 3732	4716	random.exe	80
PID 4716 wrote to memory of 3732	4716	random.exe	80
PID 4716 wrote to memory of 3732	4716	random.exe	80

C:\Users\Admin\AppData\Local\Temp\random.exe
"C:\Users\Admin\AppData\Local\Temp\random.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:4716
- C:\Windows\BitLockerDiscoveryVolumeContents\BitLockerToGo.exe
  "C:\Windows\BitLockerDiscoveryVolumeContents\BitLockerToGo.exe"
  2⤵
  - Downloads MZ/PE file
  - System Location Discovery: System Language Discovery
  PID:3732

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

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\MSSAH4ZA\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/3732-12-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3732-11-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3732-39-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3732-24-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3732-17-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/3732-8-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3732-10-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/4716-5-0x0000000000950000-0x00000000018CB000-memory.dmp

Filesize
15.5MB

Download
memory/4716-2-0x0000000000951000-0x0000000000D24000-memory.dmp

Filesize
3.8MB

Download
memory/4716-6-0x0000000000950000-0x00000000018CB000-memory.dmp

Filesize
15.5MB

Download
memory/4716-13-0x0000000000950000-0x00000000018CB000-memory.dmp

Filesize
15.5MB

Download
memory/4716-0-0x0000000000950000-0x00000000018CB000-memory.dmp

Filesize
15.5MB

Download
memory/4716-7-0x0000000000950000-0x00000000018CB000-memory.dmp

Filesize
15.5MB

Download
memory/4716-1-0x0000000077C84000-0x0000000077C86000-memory.dmp

Filesize
8KB

Download
memory/4716-4-0x0000000000950000-0x00000000018CB000-memory.dmp

Filesize
15.5MB

Download
memory/4716-3-0x0000000000950000-0x00000000018CB000-memory.dmp

Filesize
15.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads