gcleaner | 4463effeb9799edfe6c07776f1e044718792fabb6ea103b9ee016e5efd21a985

General

Target

4463effeb9799edfe6c07776f1e044718792fabb6ea103b9ee016e5efd21a985_Sigmanly.exe
Size

1.8MB
MD5

3c2e26d10fa55af2e913120df3b7eddb
SHA1

a6ba8c6378d44616d7196331c6ea54e286136ce6
SHA256

4463effeb9799edfe6c07776f1e044718792fabb6ea103b9ee016e5efd21a985
SHA512

be0d54efddd550dd9acc996df86ff2dc86a8fb50aa84e7d018736d16e06a97c746c2a3b92f70b56773fa791fe3b6ba365d676ed7683cd8f82738b2743d2a82c6
SSDEEP

49152:kA8icQ8TAFCy7gjmjVD6Gd1R6ESxZ9MswgY+YP7Mnr:YNFyM4VmIDS39MrGk7M

Score

10^/10

gcleaner discovery evasion 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

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	4463effeb9799edfe6c07776f1e044718792fabb6ea103b9ee016e5efd21a985_Sigmanly.exe

Downloads MZ/PE file

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\VideoBiosVersion	4463effeb9799edfe6c07776f1e044718792fabb6ea103b9ee016e5efd21a985_Sigmanly.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	4463effeb9799edfe6c07776f1e044718792fabb6ea103b9ee016e5efd21a985_Sigmanly.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.

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Software\Wine	4463effeb9799edfe6c07776f1e044718792fabb6ea103b9ee016e5efd21a985_Sigmanly.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
764	4463effeb9799edfe6c07776f1e044718792fabb6ea103b9ee016e5efd21a985_Sigmanly.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
1160	764	WerFault.exe	83

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	4463effeb9799edfe6c07776f1e044718792fabb6ea103b9ee016e5efd21a985_Sigmanly.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
764	4463effeb9799edfe6c07776f1e044718792fabb6ea103b9ee016e5efd21a985_Sigmanly.exe
764	4463effeb9799edfe6c07776f1e044718792fabb6ea103b9ee016e5efd21a985_Sigmanly.exe

C:\Users\Admin\AppData\Local\Temp\4463effeb9799edfe6c07776f1e044718792fabb6ea103b9ee016e5efd21a985_Sigmanly.exe
"C:\Users\Admin\AppData\Local\Temp\4463effeb9799edfe6c07776f1e044718792fabb6ea103b9ee016e5efd21a985_Sigmanly.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
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
PID:764
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 764 -s 1400
  2⤵
  - Program crash
  PID:1160

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 764 -ip 764
1⤵
PID:3208

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\0GUUC90F\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/764-15-0x0000000000400000-0x0000000000C5B000-memory.dmp

Filesize
8.4MB

Download
memory/764-2-0x0000000000401000-0x0000000000426000-memory.dmp

Filesize
148KB

Download
memory/764-19-0x0000000000400000-0x0000000000C5B000-memory.dmp

Filesize
8.4MB

Download
memory/764-20-0x0000000000400000-0x0000000000C5B000-memory.dmp

Filesize
8.4MB

Download
memory/764-6-0x0000000000400000-0x0000000000C5B000-memory.dmp

Filesize
8.4MB

Download
memory/764-7-0x0000000000400000-0x0000000000C5B000-memory.dmp

Filesize
8.4MB

Download
memory/764-12-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/764-0-0x0000000000400000-0x0000000000C5B000-memory.dmp

Filesize
8.4MB

Download
memory/764-41-0x0000000000401000-0x0000000000426000-memory.dmp

Filesize
148KB

Download
memory/764-3-0x0000000000400000-0x0000000000C5B000-memory.dmp

Filesize
8.4MB

Download
memory/764-4-0x0000000000400000-0x0000000000C5B000-memory.dmp

Filesize
8.4MB

Download
memory/764-21-0x0000000000400000-0x0000000000C5B000-memory.dmp

Filesize
8.4MB

Download
memory/764-1-0x0000000077AF4000-0x0000000077AF6000-memory.dmp

Filesize
8KB

Download
memory/764-23-0x0000000000400000-0x0000000000C5B000-memory.dmp

Filesize
8.4MB

Download
memory/764-28-0x0000000000400000-0x0000000000C5B000-memory.dmp

Filesize
8.4MB

Download
memory/764-34-0x0000000000400000-0x0000000000C5B000-memory.dmp

Filesize
8.4MB

Download
memory/764-40-0x0000000000400000-0x0000000000C5B000-memory.dmp

Filesize
8.4MB

Download
memory/764-18-0x0000000000401000-0x0000000000426000-memory.dmp

Filesize
148KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads