gcleaner | b0e7efb1c33ded1e5818fa7c0adfd655b6b6f06bc23e86c76b52d4dbd71ba190

General

Target

random.exe
Size

3.7MB
MD5

1a85b92e5c9eea99ad9cd158576db415
SHA1

297be663c521a3d3227b2e25f8027efdf1f8d4af
SHA256

b0e7efb1c33ded1e5818fa7c0adfd655b6b6f06bc23e86c76b52d4dbd71ba190
SHA512

9480d41d4bba8ad31b4eacd184207764c4eea730eb6586255c1635f1d0078a4b17f8990e6fbfcf6fb978107580627464a2d0dc3ac06f37687fc29c592ff26e64
SSDEEP

98304:zXkKJvs4jl8FI8xiXOS+CPQ8V/8qAQtomeFKwjG:zXkKOGYqOS+UQk/wXjG

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__	random.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-1-5-21-677481364-2238709445-1347953534-1000\Software\Wine	random.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
1280	random.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1280 set thread context of 2916	1280	random.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	random.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BitLockerToGo.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1280	random.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1280 wrote to memory of 2916	1280	random.exe	31
PID 1280 wrote to memory of 2916	1280	random.exe	31
PID 1280 wrote to memory of 2916	1280	random.exe	31
PID 1280 wrote to memory of 2916	1280	random.exe	31
PID 1280 wrote to memory of 2916	1280	random.exe	31
PID 1280 wrote to memory of 2916	1280	random.exe	31
PID 1280 wrote to memory of 2916	1280	random.exe	31
PID 1280 wrote to memory of 2916	1280	random.exe	31
PID 1280 wrote to memory of 2916	1280	random.exe	31
PID 1280 wrote to memory of 2916	1280	random.exe	31
PID 1280 wrote to memory of 2916	1280	random.exe	31

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:1280
- C:\Windows\BitLockerDiscoveryVolumeContents\BitLockerToGo.exe
  "C:\Windows\BitLockerDiscoveryVolumeContents\BitLockerToGo.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2916

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\HIG00EVV\service[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/1280-6-0x00000000003B0000-0x0000000000DB9000-memory.dmp

Filesize
10.0MB

Download
memory/1280-12-0x00000000003B0000-0x0000000000DB9000-memory.dmp

Filesize
10.0MB

Download
memory/1280-3-0x00000000003B0000-0x0000000000DB9000-memory.dmp

Filesize
10.0MB

Download
memory/1280-4-0x00000000003B0000-0x0000000000DB9000-memory.dmp

Filesize
10.0MB

Download
memory/1280-5-0x00000000003B0000-0x0000000000DB9000-memory.dmp

Filesize
10.0MB

Download
memory/1280-0-0x00000000003B0000-0x0000000000DB9000-memory.dmp

Filesize
10.0MB

Download
memory/1280-1-0x0000000077DC0000-0x0000000077DC2000-memory.dmp

Filesize
8KB

Download
memory/1280-2-0x00000000003B1000-0x00000000005B0000-memory.dmp

Filesize
2.0MB

Download
memory/2916-8-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2916-11-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2916-10-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2916-16-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/2916-21-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2916-7-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads