gcleaner | ec2349f4f55242a8328a7f11c5013a7525fa05aa18a680c1d82f2d6d93e6e1ad

General

Target

1f39fac8d8f8c1e3e0697ebf585af36c.exe
Size

1.9MB
MD5

1f39fac8d8f8c1e3e0697ebf585af36c
SHA1

f98243a6bdea8f7de4cfa02d157e94b1cf925f51
SHA256

ec2349f4f55242a8328a7f11c5013a7525fa05aa18a680c1d82f2d6d93e6e1ad
SHA512

ebf1551cc77e6f815f18ebd38ffc3b581fbc0b07642175db9178652e3cad6be0a38bf978ea09d46815ca64b1482a87261ac5e34303b14420ce89c7c684a7aaed
SSDEEP

49152:gqvEiVW9Nwg8O4DXVGgGSpJm9FS2OEVRl/+Z6uwF:ZS8RTVG5SpkSyLmZa

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__	1f39fac8d8f8c1e3e0697ebf585af36c.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	1f39fac8d8f8c1e3e0697ebf585af36c.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	1f39fac8d8f8c1e3e0697ebf585af36c.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-1-5-21-493223053-2004649691-1575712786-1000\Software\Wine	1f39fac8d8f8c1e3e0697ebf585af36c.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
4412	1f39fac8d8f8c1e3e0697ebf585af36c.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2180	4412	WerFault.exe	82

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	1f39fac8d8f8c1e3e0697ebf585af36c.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4412	1f39fac8d8f8c1e3e0697ebf585af36c.exe
4412	1f39fac8d8f8c1e3e0697ebf585af36c.exe

C:\Users\Admin\AppData\Local\Temp\1f39fac8d8f8c1e3e0697ebf585af36c.exe
"C:\Users\Admin\AppData\Local\Temp\1f39fac8d8f8c1e3e0697ebf585af36c.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
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
PID:4412
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4412 -s 1548
  2⤵
  - Program crash
  PID:2180

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4412 -ip 4412
1⤵
PID:1176

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

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\DQ67RYHS\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/4412-4-0x0000000000400000-0x0000000000C7B000-memory.dmp

Filesize
8.5MB

Download
memory/4412-14-0x0000000000400000-0x0000000000C7B000-memory.dmp

Filesize
8.5MB

Download
memory/4412-3-0x0000000000400000-0x0000000000C7B000-memory.dmp

Filesize
8.5MB

Download
memory/4412-0-0x0000000000400000-0x0000000000C7B000-memory.dmp

Filesize
8.5MB

Download
memory/4412-17-0x0000000000400000-0x0000000000C7B000-memory.dmp

Filesize
8.5MB

Download
memory/4412-10-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/4412-2-0x0000000000401000-0x0000000000426000-memory.dmp

Filesize
148KB

Download
memory/4412-16-0x0000000000401000-0x0000000000426000-memory.dmp

Filesize
148KB

Download
memory/4412-6-0x0000000000400000-0x0000000000C7B000-memory.dmp

Filesize
8.5MB

Download
memory/4412-19-0x0000000000400000-0x0000000000C7B000-memory.dmp

Filesize
8.5MB

Download
memory/4412-20-0x0000000000400000-0x0000000000C7B000-memory.dmp

Filesize
8.5MB

Download
memory/4412-1-0x00000000778D4000-0x00000000778D6000-memory.dmp

Filesize
8KB

Download
memory/4412-26-0x0000000000400000-0x0000000000C7B000-memory.dmp

Filesize
8.5MB

Download
memory/4412-32-0x0000000000400000-0x0000000000C7B000-memory.dmp

Filesize
8.5MB

Download
memory/4412-40-0x0000000000401000-0x0000000000426000-memory.dmp

Filesize
148KB

Download
memory/4412-39-0x0000000000400000-0x0000000000C7B000-memory.dmp

Filesize
8.5MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads