gcleaner | 4c9e514da670422e773cac781d66a4207a31d78e7a21d30a0536bfff27a739c6

General

Target

c6e0798bf3.exe
Size

3.7MB
MD5

467266ba67d21e7180338773c0529039
SHA1

6d9c86ac604e3b3a2bdf86fdc106eda4226c3a1a
SHA256

4c9e514da670422e773cac781d66a4207a31d78e7a21d30a0536bfff27a739c6
SHA512

94e2f33f7198bb7d19ec87af7749957c563b8f7c9d8c11e10c4e66c1023f00ea526c7eb336ce21f1ad4d7c6c00f00ced32b90a3e0df8db5b3d1e45b13a7e3cea
SSDEEP

98304:pXaGesQTmvWQrS1n8qkk4WbFTFLH8AbRakvyz0bLooZh20F:1ATmOQrSC/0FTFDNxK0PoovB

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__	c6e0798bf3.exe

Downloads MZ/PE file 1 IoCs

flow	pid	Process
10	888	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	c6e0798bf3.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	c6e0798bf3.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-1-5-21-100612193-3312047696-905266872-1000\Software\Wine	c6e0798bf3.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
5072	c6e0798bf3.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5072 set thread context of 888	5072	c6e0798bf3.exe	88

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	c6e0798bf3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BitLockerToGo.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
5072	c6e0798bf3.exe
5072	c6e0798bf3.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 5072 wrote to memory of 888	5072	c6e0798bf3.exe	88
PID 5072 wrote to memory of 888	5072	c6e0798bf3.exe	88
PID 5072 wrote to memory of 888	5072	c6e0798bf3.exe	88
PID 5072 wrote to memory of 888	5072	c6e0798bf3.exe	88
PID 5072 wrote to memory of 888	5072	c6e0798bf3.exe	88
PID 5072 wrote to memory of 888	5072	c6e0798bf3.exe	88
PID 5072 wrote to memory of 888	5072	c6e0798bf3.exe	88
PID 5072 wrote to memory of 888	5072	c6e0798bf3.exe	88
PID 5072 wrote to memory of 888	5072	c6e0798bf3.exe	88
PID 5072 wrote to memory of 888	5072	c6e0798bf3.exe	88

C:\Users\Admin\AppData\Local\Temp\c6e0798bf3.exe
"C:\Users\Admin\AppData\Local\Temp\c6e0798bf3.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:5072
- C:\Windows\BitLockerDiscoveryVolumeContents\BitLockerToGo.exe
  "C:\Windows\BitLockerDiscoveryVolumeContents\BitLockerToGo.exe"
  2⤵
  - Downloads MZ/PE file
  - System Location Discovery: System Language Discovery
  PID:888

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\O5FW3LII\service[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/888-13-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/888-11-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/888-39-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/888-24-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/888-17-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/888-8-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/888-9-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/5072-5-0x00000000009C0000-0x00000000013D0000-memory.dmp

Filesize
10.1MB

Download
memory/5072-2-0x00000000009C1000-0x0000000000BC0000-memory.dmp

Filesize
2.0MB

Download
memory/5072-6-0x00000000009C0000-0x00000000013D0000-memory.dmp

Filesize
10.1MB

Download
memory/5072-12-0x00000000009C0000-0x00000000013D0000-memory.dmp

Filesize
10.1MB

Download
memory/5072-0-0x00000000009C0000-0x00000000013D0000-memory.dmp

Filesize
10.1MB

Download
memory/5072-7-0x00000000009C0000-0x00000000013D0000-memory.dmp

Filesize
10.1MB

Download
memory/5072-1-0x0000000077AA4000-0x0000000077AA6000-memory.dmp

Filesize
8KB

Download
memory/5072-4-0x00000000009C0000-0x00000000013D0000-memory.dmp

Filesize
10.1MB

Download
memory/5072-3-0x00000000009C0000-0x00000000013D0000-memory.dmp

Filesize
10.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads