gcleaner | 685c88c2a8dc769e84c19d2ec43ddc6fdfb509ad3bf73af21e3dc50b67d43b1c

General

Target

685c88c2a8dc769e84c19d2ec43ddc6fdfb509ad3bf73af21e3dc50b67d43b1c.exe
Size

3.8MB
MD5

8245b0de0c4386a3e4c61f74ece03f25
SHA1

b92330b2b9e7cb9aead89d1d89d7871f5e27ff85
SHA256

685c88c2a8dc769e84c19d2ec43ddc6fdfb509ad3bf73af21e3dc50b67d43b1c
SHA512

9890738255e7d1f3ef2c5e424a775886ce183fa10f699f177f153a0d67aa342c38d1f9ab7aea4f0e74af86b92f9e15c80af5ff28773d042987e057e5bdaaad63
SSDEEP

98304:VTHEgTcY0SbWN8G9Dqz7dIJcDvP/nkn4HnxjpeDOVXJakL:aSWN8Aqz7SakWnPeiVXzL

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__	685c88c2a8dc769e84c19d2ec43ddc6fdfb509ad3bf73af21e3dc50b67d43b1c.exe

Downloads MZ/PE file 1 IoCs

flow	pid	Process
4	2224	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	685c88c2a8dc769e84c19d2ec43ddc6fdfb509ad3bf73af21e3dc50b67d43b1c.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	685c88c2a8dc769e84c19d2ec43ddc6fdfb509ad3bf73af21e3dc50b67d43b1c.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-1-5-21-1846800975-3917212583-2893086201-1000\Software\Wine	685c88c2a8dc769e84c19d2ec43ddc6fdfb509ad3bf73af21e3dc50b67d43b1c.exe

Loads dropped DLL 1 IoCs

pid	Process
2224	BitLockerToGo.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2092	685c88c2a8dc769e84c19d2ec43ddc6fdfb509ad3bf73af21e3dc50b67d43b1c.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2092 set thread context of 2224	2092	685c88c2a8dc769e84c19d2ec43ddc6fdfb509ad3bf73af21e3dc50b67d43b1c.exe	31

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	685c88c2a8dc769e84c19d2ec43ddc6fdfb509ad3bf73af21e3dc50b67d43b1c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BitLockerToGo.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2092	685c88c2a8dc769e84c19d2ec43ddc6fdfb509ad3bf73af21e3dc50b67d43b1c.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2092 wrote to memory of 2224	2092	685c88c2a8dc769e84c19d2ec43ddc6fdfb509ad3bf73af21e3dc50b67d43b1c.exe	31
PID 2092 wrote to memory of 2224	2092	685c88c2a8dc769e84c19d2ec43ddc6fdfb509ad3bf73af21e3dc50b67d43b1c.exe	31
PID 2092 wrote to memory of 2224	2092	685c88c2a8dc769e84c19d2ec43ddc6fdfb509ad3bf73af21e3dc50b67d43b1c.exe	31
PID 2092 wrote to memory of 2224	2092	685c88c2a8dc769e84c19d2ec43ddc6fdfb509ad3bf73af21e3dc50b67d43b1c.exe	31
PID 2092 wrote to memory of 2224	2092	685c88c2a8dc769e84c19d2ec43ddc6fdfb509ad3bf73af21e3dc50b67d43b1c.exe	31
PID 2092 wrote to memory of 2224	2092	685c88c2a8dc769e84c19d2ec43ddc6fdfb509ad3bf73af21e3dc50b67d43b1c.exe	31
PID 2092 wrote to memory of 2224	2092	685c88c2a8dc769e84c19d2ec43ddc6fdfb509ad3bf73af21e3dc50b67d43b1c.exe	31
PID 2092 wrote to memory of 2224	2092	685c88c2a8dc769e84c19d2ec43ddc6fdfb509ad3bf73af21e3dc50b67d43b1c.exe	31
PID 2092 wrote to memory of 2224	2092	685c88c2a8dc769e84c19d2ec43ddc6fdfb509ad3bf73af21e3dc50b67d43b1c.exe	31
PID 2092 wrote to memory of 2224	2092	685c88c2a8dc769e84c19d2ec43ddc6fdfb509ad3bf73af21e3dc50b67d43b1c.exe	31
PID 2092 wrote to memory of 2224	2092	685c88c2a8dc769e84c19d2ec43ddc6fdfb509ad3bf73af21e3dc50b67d43b1c.exe	31

C:\Users\Admin\AppData\Local\Temp\685c88c2a8dc769e84c19d2ec43ddc6fdfb509ad3bf73af21e3dc50b67d43b1c.exe
"C:\Users\Admin\AppData\Local\Temp\685c88c2a8dc769e84c19d2ec43ddc6fdfb509ad3bf73af21e3dc50b67d43b1c.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:2092
- 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:2224

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\Temporary Internet Files\Content.IE5\Q0WBLVJY\service[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
\Users\Admin\AppData\Local\Temp\52NeNRKKRzfeWw53Du5CdYf\Y-Cleaner.exe

Filesize
987KB

MD5
f49d1aaae28b92052e997480c504aa3b

SHA1
a422f6403847405cee6068f3394bb151d8591fb5

SHA256
81e31780a5f2078284b011c720261797eb8dd85e1b95a657dbce7ac31e9df1f0

SHA512
41f715eea031fd8d7d3a22d88e0199277db2f86be73f830819288c0f0665e81a314be6d356fdc66069cb3f2abf0dd02aaa49ac3732f3f44a533fcec0dfd6f773

Download Submit
memory/2092-8-0x0000000000390000-0x0000000000DAA000-memory.dmp

Filesize
10.1MB

Download
memory/2092-10-0x0000000000390000-0x0000000000DAA000-memory.dmp

Filesize
10.1MB

Download
memory/2092-4-0x0000000000390000-0x0000000000DAA000-memory.dmp

Filesize
10.1MB

Download
memory/2092-5-0x0000000000390000-0x0000000000DAA000-memory.dmp

Filesize
10.1MB

Download
memory/2092-6-0x0000000000390000-0x0000000000DAA000-memory.dmp

Filesize
10.1MB

Download
memory/2092-1-0x00000000779A0000-0x00000000779A2000-memory.dmp

Filesize
8KB

Download
memory/2092-0-0x0000000000390000-0x0000000000DAA000-memory.dmp

Filesize
10.1MB

Download
memory/2092-9-0x0000000000390000-0x0000000000DAA000-memory.dmp

Filesize
10.1MB

Download
memory/2092-2-0x0000000000391000-0x0000000000590000-memory.dmp

Filesize
2.0MB

Download
memory/2092-3-0x0000000000390000-0x0000000000DAA000-memory.dmp

Filesize
10.1MB

Download
memory/2224-12-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2224-11-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2224-17-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/2224-23-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2224-13-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2224-7-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2224-40-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads