gcleaner | 20fb1fc5c152494c9cb0fe0a5e9b537b8af97b220d92ce7014b5f35f46ed8e8c

General

Target

20fb1fc5c152494c9cb0fe0a5e9b537b8af97b220d92ce7014b5f35f46ed8e8c.exe
Size

1.9MB
MD5

42f0872c55ae1ccb917aef23fae7135d
SHA1

cc0fe9e2b4647834d39efc7b4c2cbe20d1bb4810
SHA256

20fb1fc5c152494c9cb0fe0a5e9b537b8af97b220d92ce7014b5f35f46ed8e8c
SHA512

126d436957b85e2b107176209fee22a7f12132a9e9d38ebfec8cf72337b7b3d63479e06d88b304c55f6624b3692be67e0b6381a60f706ddacde4183061901f48
SSDEEP

49152:zS1DcBqKwYU+mIHBARmeWlUM5R0EpjxQpg:m/YdmIGRV6TnhxQp

Score

10^/10

gcleaner defense_evasion discovery 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

defense_evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	20fb1fc5c152494c9cb0fe0a5e9b537b8af97b220d92ce7014b5f35f46ed8e8c.exe

Downloads MZ/PE file 1 IoCs

flow	pid	Process
15	1532	20fb1fc5c152494c9cb0fe0a5e9b537b8af97b220d92ce7014b5f35f46ed8e8c.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	20fb1fc5c152494c9cb0fe0a5e9b537b8af97b220d92ce7014b5f35f46ed8e8c.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	20fb1fc5c152494c9cb0fe0a5e9b537b8af97b220d92ce7014b5f35f46ed8e8c.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-1-5-21-1045960512-3948844814-3059691613-1000\Software\Wine	20fb1fc5c152494c9cb0fe0a5e9b537b8af97b220d92ce7014b5f35f46ed8e8c.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
1532	20fb1fc5c152494c9cb0fe0a5e9b537b8af97b220d92ce7014b5f35f46ed8e8c.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
1060	1532	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	20fb1fc5c152494c9cb0fe0a5e9b537b8af97b220d92ce7014b5f35f46ed8e8c.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1532	20fb1fc5c152494c9cb0fe0a5e9b537b8af97b220d92ce7014b5f35f46ed8e8c.exe
1532	20fb1fc5c152494c9cb0fe0a5e9b537b8af97b220d92ce7014b5f35f46ed8e8c.exe

C:\Users\Admin\AppData\Local\Temp\20fb1fc5c152494c9cb0fe0a5e9b537b8af97b220d92ce7014b5f35f46ed8e8c.exe
"C:\Users\Admin\AppData\Local\Temp\20fb1fc5c152494c9cb0fe0a5e9b537b8af97b220d92ce7014b5f35f46ed8e8c.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Downloads MZ/PE file
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
PID:1532
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1532 -s 1484
  2⤵
  - Program crash
  PID:1060

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 1532 -ip 1532
1⤵
PID:4644

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\9MFSIIMR\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/1532-15-0x0000000000400000-0x0000000000C78000-memory.dmp

Filesize
8.5MB

Download
memory/1532-20-0x0000000000400000-0x0000000000C78000-memory.dmp

Filesize
8.5MB

Download
memory/1532-3-0x0000000000400000-0x0000000000C78000-memory.dmp

Filesize
8.5MB

Download
memory/1532-4-0x0000000000400000-0x0000000000C78000-memory.dmp

Filesize
8.5MB

Download
memory/1532-6-0x0000000000400000-0x0000000000C78000-memory.dmp

Filesize
8.5MB

Download
memory/1532-7-0x0000000000400000-0x0000000000C78000-memory.dmp

Filesize
8.5MB

Download
memory/1532-11-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/1532-0-0x0000000000400000-0x0000000000C78000-memory.dmp

Filesize
8.5MB

Download
memory/1532-2-0x0000000000401000-0x0000000000426000-memory.dmp

Filesize
148KB

Download
memory/1532-18-0x0000000000401000-0x0000000000426000-memory.dmp

Filesize
148KB

Download
memory/1532-19-0x0000000000400000-0x0000000000C78000-memory.dmp

Filesize
8.5MB

Download
memory/1532-21-0x0000000000400000-0x0000000000C78000-memory.dmp

Filesize
8.5MB

Download
memory/1532-1-0x0000000077A54000-0x0000000077A56000-memory.dmp

Filesize
8KB

Download
memory/1532-23-0x0000000000400000-0x0000000000C78000-memory.dmp

Filesize
8.5MB

Download
memory/1532-28-0x0000000000400000-0x0000000000C78000-memory.dmp

Filesize
8.5MB

Download
memory/1532-34-0x0000000000400000-0x0000000000C78000-memory.dmp

Filesize
8.5MB

Download
memory/1532-40-0x0000000000400000-0x0000000000C78000-memory.dmp

Filesize
8.5MB

Download
memory/1532-41-0x0000000000401000-0x0000000000426000-memory.dmp

Filesize
148KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads