gcleaner | 7744c24650c3210f4510b05128c3b6dfdcd6b6f9de9e6c3ce72df0f0f10550b5

General

Target

ZBHAM_random.exe
Size

4.4MB
MD5

2c758ec0b9bf2b441ce28fc0ce212996
SHA1

c5135b1c4de89bcb15d066c06b742ab66264ec47
SHA256

7744c24650c3210f4510b05128c3b6dfdcd6b6f9de9e6c3ce72df0f0f10550b5
SHA512

c6bb956eeb481de1e885965081a8d2ea26fcdc00307b169ba0bd0aecf5ace7befdd1f0b6244f31f10c8b1c768f48cc5b78b795dca05ee643ab9c2498a79425e1
SSDEEP

98304:jD6xEwlLhToJaFZsbbWgZaE1y7ZWlLSI06LaCfgXbEfC:v6SkLhgYzEv86WCfpC

Score

10^/10

gcleaner defense_evasion discovery loader

Malware Config

Extracted

Family

gcleaner

C2

185.156.73.98

45.91.200.135

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__	ZBHAM_random.exe

Downloads MZ/PE file 1 IoCs

flow	pid	Process
59	2552	svchost015.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	ZBHAM_random.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	ZBHAM_random.exe

Executes dropped EXE 1 IoCs

pid	Process
2552	svchost015.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-1-5-21-805952410-2104024357-1716932545-1000\Software\Wine	ZBHAM_random.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2912	ZBHAM_random.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2912 set thread context of 2552	2912	ZBHAM_random.exe	91

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 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	ZBHAM_random.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost015.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2912	ZBHAM_random.exe
2912	ZBHAM_random.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2912 wrote to memory of 2552	2912	ZBHAM_random.exe	91
PID 2912 wrote to memory of 2552	2912	ZBHAM_random.exe	91
PID 2912 wrote to memory of 2552	2912	ZBHAM_random.exe	91
PID 2912 wrote to memory of 2552	2912	ZBHAM_random.exe	91
PID 2912 wrote to memory of 2552	2912	ZBHAM_random.exe	91
PID 2912 wrote to memory of 2552	2912	ZBHAM_random.exe	91
PID 2912 wrote to memory of 2552	2912	ZBHAM_random.exe	91
PID 2912 wrote to memory of 2552	2912	ZBHAM_random.exe	91
PID 2912 wrote to memory of 2552	2912	ZBHAM_random.exe	91

C:\Users\Admin\AppData\Local\Temp\ZBHAM_random.exe
"C:\Users\Admin\AppData\Local\Temp\ZBHAM_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:2912
- C:\Users\Admin\AppData\Local\Temp\svchost015.exe
  "C:\Users\Admin\AppData\Local\Temp\ZBHAM_random.exe"
  2⤵
  - Downloads MZ/PE file
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2552

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\28X5YDPF\service[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
C:\Users\Admin\AppData\Local\Temp\svchost015.exe

Filesize
2.9MB

MD5
b826dd92d78ea2526e465a34324ebeea

SHA1
bf8a0093acfd2eb93c102e1a5745fb080575372e

SHA256
7824b50acdd144764dac7445a4067b35cf0fef619e451045ab6c1f54f5653a5b

SHA512
1ac4b731b9b31cabf3b1c43aee37206aee5326c8e786abe2ab38e031633b778f97f2d6545cf745c3066f3bd47b7aaf2ded2f9955475428100eaf271dd9aeef17

Download Submit
memory/2552-20-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/2552-16-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2552-46-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2552-38-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2552-10-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2552-11-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2552-14-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2552-25-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2552-7-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2912-12-0x0000000000400000-0x0000000000DFF000-memory.dmp

Filesize
10.0MB

Download
memory/2912-0-0x0000000000400000-0x0000000000DFF000-memory.dmp

Filesize
10.0MB

Download
memory/2912-3-0x0000000000400000-0x0000000000DFF000-memory.dmp

Filesize
10.0MB

Download
memory/2912-1-0x00000000774E4000-0x00000000774E6000-memory.dmp

Filesize
8KB

Download
memory/2912-2-0x0000000000401000-0x0000000000449000-memory.dmp

Filesize
288KB

Download
memory/2912-4-0x0000000000400000-0x0000000000DFF000-memory.dmp

Filesize
10.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads