gcleaner | f18578f6f08ed309a5e3c430e0a35348ee2c7dd7330a6551a3faec6497f080bb

General

Target

random.exe
Size

4.3MB
MD5

25f01463c15e5402fff5524d2075d64b
SHA1

19a363879f86fd62e3bbfc3c817b80b11aab59f6
SHA256

f18578f6f08ed309a5e3c430e0a35348ee2c7dd7330a6551a3faec6497f080bb
SHA512

3a32fa38b351eb140cf24a8764cc8edc0ff30e074acb8fbf61c27ecee9b947f7cfd32ac067e14639d5551296438dfebd4ec7df70238db0e742351d59e743ace9
SSDEEP

98304:YFrtRTeY3rDfaMKE0RAcSF6vdRS/VKontDCtQVEXuY1oNOspa:gtRX3rzaMKEg1cbDEQYuCqt

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__	random.exe

Downloads MZ/PE file 1 IoCs

flow	pid	Process
59	2932	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	random.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	random.exe

Executes dropped EXE 1 IoCs

pid	Process
2932	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-1-5-21-3218366390-1258052702-4267193707-1000\Software\Wine	random.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
776	random.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 776 set thread context of 2932	776	random.exe	90

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

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
776	random.exe
776	random.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 776 wrote to memory of 2932	776	random.exe	90
PID 776 wrote to memory of 2932	776	random.exe	90
PID 776 wrote to memory of 2932	776	random.exe	90
PID 776 wrote to memory of 2932	776	random.exe	90
PID 776 wrote to memory of 2932	776	random.exe	90
PID 776 wrote to memory of 2932	776	random.exe	90
PID 776 wrote to memory of 2932	776	random.exe	90
PID 776 wrote to memory of 2932	776	random.exe	90
PID 776 wrote to memory of 2932	776	random.exe	90

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:776
- C:\Users\Admin\AppData\Local\Temp\svchost015.exe
  "C:\Users\Admin\AppData\Local\Temp\random.exe"
  2⤵
  - Downloads MZ/PE file
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2932

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\84O89Q0W\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/776-0-0x0000000000400000-0x0000000000CC6000-memory.dmp

Filesize
8.8MB

Download
memory/776-1-0x0000000077B34000-0x0000000077B36000-memory.dmp

Filesize
8KB

Download
memory/776-2-0x0000000000401000-0x0000000000433000-memory.dmp

Filesize
200KB

Download
memory/776-3-0x0000000000400000-0x0000000000CC6000-memory.dmp

Filesize
8.8MB

Download
memory/776-4-0x0000000000400000-0x0000000000CC6000-memory.dmp

Filesize
8.8MB

Download
memory/776-13-0x0000000000400000-0x0000000000CC6000-memory.dmp

Filesize
8.8MB

Download
memory/2932-7-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2932-14-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2932-10-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2932-16-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2932-19-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/2932-25-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2932-11-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2932-40-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2932-45-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads