gcleaner | cb6b4bb0b3fc19a3626bd33f40f4399e667db405f4ac56b69b2b271816df371b

General

Target

cb6b4bb0b3fc19a3626bd33f40f4399e667db405f4ac56b69b2b271816df371bN.exe
Size

1.8MB
MD5

7d259326e9642c8a13d30573dafe3d90
SHA1

fc5ba1d2215d2785b5223f501ce0254973adad2c
SHA256

cb6b4bb0b3fc19a3626bd33f40f4399e667db405f4ac56b69b2b271816df371b
SHA512

ddb2e84a2f3e88eda5f4c847a7bb836fc7eff26d6d47d5e74bc27180f6f346b78cb5d4aa35040b6be0f24e53651024ea59a9623f83c939762ccc216a567e4fbb
SSDEEP

49152:tEUr5fRFAZmYEuoqNGsDfxOPfHzTOYsohE:t7BspoqppOPv/h

Score

10^/10

gcleaner discovery evasion loader

Malware Config

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

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	cb6b4bb0b3fc19a3626bd33f40f4399e667db405f4ac56b69b2b271816df371bN.exe

Downloads MZ/PE file

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	cb6b4bb0b3fc19a3626bd33f40f4399e667db405f4ac56b69b2b271816df371bN.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	cb6b4bb0b3fc19a3626bd33f40f4399e667db405f4ac56b69b2b271816df371bN.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.

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Wine	cb6b4bb0b3fc19a3626bd33f40f4399e667db405f4ac56b69b2b271816df371bN.exe

Loads dropped DLL 1 IoCs

pid	Process
2236	cb6b4bb0b3fc19a3626bd33f40f4399e667db405f4ac56b69b2b271816df371bN.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2236	cb6b4bb0b3fc19a3626bd33f40f4399e667db405f4ac56b69b2b271816df371bN.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 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	cb6b4bb0b3fc19a3626bd33f40f4399e667db405f4ac56b69b2b271816df371bN.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2236	cb6b4bb0b3fc19a3626bd33f40f4399e667db405f4ac56b69b2b271816df371bN.exe

C:\Users\Admin\AppData\Local\Temp\cb6b4bb0b3fc19a3626bd33f40f4399e667db405f4ac56b69b2b271816df371bN.exe
"C:\Users\Admin\AppData\Local\Temp\cb6b4bb0b3fc19a3626bd33f40f4399e667db405f4ac56b69b2b271816df371bN.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
PID:2236

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

2

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

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\Y8UFEBH5\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
\Users\Admin\AppData\Local\Temp\fA9v5uDe37ZYeF3\Y-Cleaner.exe

Filesize
1.4MB

MD5
a8cf5621811f7fac55cfe8cb3fa6b9f6

SHA1
121356839e8138a03141f5f5856936a85bd2a474

SHA256
614a0362ab87cee48d0935b5bb957d539be1d94c6fdeb3fe42fac4fbe182c10c

SHA512
4479d951435f222ca7306774002f030972c9f1715d6aaf512fca9420dd79cb6d08240f80129f213851773290254be34f0ff63c7b1f4d554a7db5f84b69e84bdd

Download Submit
memory/2236-12-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/2236-18-0x0000000000400000-0x0000000000C4D000-memory.dmp

Filesize
8.3MB

Download
memory/2236-3-0x0000000000400000-0x0000000000C4D000-memory.dmp

Filesize
8.3MB

Download
memory/2236-6-0x0000000000400000-0x0000000000C4D000-memory.dmp

Filesize
8.3MB

Download
memory/2236-7-0x0000000000400000-0x0000000000C4D000-memory.dmp

Filesize
8.3MB

Download
memory/2236-8-0x0000000000400000-0x0000000000C4D000-memory.dmp

Filesize
8.3MB

Download
memory/2236-0-0x0000000000400000-0x0000000000C4D000-memory.dmp

Filesize
8.3MB

Download
memory/2236-16-0x0000000000400000-0x0000000000C4D000-memory.dmp

Filesize
8.3MB

Download
memory/2236-17-0x0000000000401000-0x0000000000426000-memory.dmp

Filesize
148KB

Download
memory/2236-4-0x0000000000400000-0x0000000000C4D000-memory.dmp

Filesize
8.3MB

Download
memory/2236-20-0x0000000000400000-0x0000000000C4D000-memory.dmp

Filesize
8.3MB

Download
memory/2236-21-0x0000000000400000-0x0000000000C4D000-memory.dmp

Filesize
8.3MB

Download
memory/2236-2-0x0000000000401000-0x0000000000426000-memory.dmp

Filesize
148KB

Download
memory/2236-26-0x0000000000400000-0x0000000000C4D000-memory.dmp

Filesize
8.3MB

Download
memory/2236-32-0x0000000000400000-0x0000000000C4D000-memory.dmp

Filesize
8.3MB

Download
memory/2236-1-0x0000000077050000-0x0000000077052000-memory.dmp

Filesize
8KB

Download
memory/2236-42-0x0000000000400000-0x0000000000C4D000-memory.dmp

Filesize
8.3MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads