gcleaner | 99ba4ae380ef7286998a99225a487dfeecf2f5aa2308b944804dbef6cdd88b67

General

Target

99ba4ae380ef7286998a99225a487dfeecf2f5aa2308b944804dbef6cdd88b67.exe
Size

4.0MB
MD5

c6800b519761dbbd0e7d4cfbce36a2ae
SHA1

a2797c2fd03b860b59169522ab67b581102fc61e
SHA256

99ba4ae380ef7286998a99225a487dfeecf2f5aa2308b944804dbef6cdd88b67
SHA512

65d1f684ab6e7d619e966d06c2a2df9e9ae4ca95a4500ce3003ea16aaaec96c6a6c6be3269ed3cc9d08fefcebbad85ba1a37056908eb54ec8954544cbf819a1e
SSDEEP

98304:UqfKzWmzOyzrN06VYC1HqZiQLKinf1entdpP7XbF/U:UqNmzOyvNn0FLKifMtzXh

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__	99ba4ae380ef7286998a99225a487dfeecf2f5aa2308b944804dbef6cdd88b67.exe

Downloads MZ/PE file 1 IoCs

flow	pid	Process
9	1668	BitLockerToGo.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	99ba4ae380ef7286998a99225a487dfeecf2f5aa2308b944804dbef6cdd88b67.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	99ba4ae380ef7286998a99225a487dfeecf2f5aa2308b944804dbef6cdd88b67.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-1-5-21-1874072718-2205492803-118941907-1000\Software\Wine	99ba4ae380ef7286998a99225a487dfeecf2f5aa2308b944804dbef6cdd88b67.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
4936	99ba4ae380ef7286998a99225a487dfeecf2f5aa2308b944804dbef6cdd88b67.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4936 set thread context of 1668	4936	99ba4ae380ef7286998a99225a487dfeecf2f5aa2308b944804dbef6cdd88b67.exe	87

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	99ba4ae380ef7286998a99225a487dfeecf2f5aa2308b944804dbef6cdd88b67.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BitLockerToGo.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4936	99ba4ae380ef7286998a99225a487dfeecf2f5aa2308b944804dbef6cdd88b67.exe
4936	99ba4ae380ef7286998a99225a487dfeecf2f5aa2308b944804dbef6cdd88b67.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4936 wrote to memory of 1668	4936	99ba4ae380ef7286998a99225a487dfeecf2f5aa2308b944804dbef6cdd88b67.exe	87
PID 4936 wrote to memory of 1668	4936	99ba4ae380ef7286998a99225a487dfeecf2f5aa2308b944804dbef6cdd88b67.exe	87
PID 4936 wrote to memory of 1668	4936	99ba4ae380ef7286998a99225a487dfeecf2f5aa2308b944804dbef6cdd88b67.exe	87
PID 4936 wrote to memory of 1668	4936	99ba4ae380ef7286998a99225a487dfeecf2f5aa2308b944804dbef6cdd88b67.exe	87
PID 4936 wrote to memory of 1668	4936	99ba4ae380ef7286998a99225a487dfeecf2f5aa2308b944804dbef6cdd88b67.exe	87
PID 4936 wrote to memory of 1668	4936	99ba4ae380ef7286998a99225a487dfeecf2f5aa2308b944804dbef6cdd88b67.exe	87
PID 4936 wrote to memory of 1668	4936	99ba4ae380ef7286998a99225a487dfeecf2f5aa2308b944804dbef6cdd88b67.exe	87
PID 4936 wrote to memory of 1668	4936	99ba4ae380ef7286998a99225a487dfeecf2f5aa2308b944804dbef6cdd88b67.exe	87
PID 4936 wrote to memory of 1668	4936	99ba4ae380ef7286998a99225a487dfeecf2f5aa2308b944804dbef6cdd88b67.exe	87
PID 4936 wrote to memory of 1668	4936	99ba4ae380ef7286998a99225a487dfeecf2f5aa2308b944804dbef6cdd88b67.exe	87

C:\Users\Admin\AppData\Local\Temp\99ba4ae380ef7286998a99225a487dfeecf2f5aa2308b944804dbef6cdd88b67.exe
"C:\Users\Admin\AppData\Local\Temp\99ba4ae380ef7286998a99225a487dfeecf2f5aa2308b944804dbef6cdd88b67.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:4936
- C:\Windows\BitLockerDiscoveryVolumeContents\BitLockerToGo.exe
  "C:\Windows\BitLockerDiscoveryVolumeContents\BitLockerToGo.exe"
  2⤵
  - Downloads MZ/PE file
  - System Location Discovery: System Language Discovery
  PID:1668

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\INetCache\IE\ZKC1FSM4\service[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/1668-11-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1668-9-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1668-39-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1668-24-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1668-17-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/1668-12-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1668-8-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/4936-5-0x00000000007A0000-0x0000000001257000-memory.dmp

Filesize
10.7MB

Download
memory/4936-13-0x00000000007A0000-0x0000000001257000-memory.dmp

Filesize
10.7MB

Download
memory/4936-2-0x00000000007A1000-0x00000000009DE000-memory.dmp

Filesize
2.2MB

Download
memory/4936-6-0x00000000007A0000-0x0000000001257000-memory.dmp

Filesize
10.7MB

Download
memory/4936-0-0x00000000007A0000-0x0000000001257000-memory.dmp

Filesize
10.7MB

Download
memory/4936-7-0x00000000007A0000-0x0000000001257000-memory.dmp

Filesize
10.7MB

Download
memory/4936-1-0x0000000076F94000-0x0000000076F96000-memory.dmp

Filesize
8KB

Download
memory/4936-4-0x00000000007A0000-0x0000000001257000-memory.dmp

Filesize
10.7MB

Download
memory/4936-3-0x00000000007A0000-0x0000000001257000-memory.dmp

Filesize
10.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads