gcleaner | 81c56ebb5ce329cbde207a7bc43e71d90375ec932fd292436341ae212cfda275

General

Target

81c56ebb5ce329cbde207a7bc43e71d90375ec932fd292436341ae212cfda275.exe
Size

1.8MB
MD5

fc2c2bf84a859d674e3d0c4844ad4e70
SHA1

ad3068dbf9bcfa9672e353acd9ef916d9b6e7e45
SHA256

81c56ebb5ce329cbde207a7bc43e71d90375ec932fd292436341ae212cfda275
SHA512

091d2a6b24715af3bee4e2f5970b77ec63ec6fc886d7d513ca059d61e764ca82448ae6e9606f919da9c1ab240b984b5c20df73296158281b0efa1bdade5e334c
SSDEEP

49152:fQkuSJnhtNj8vTCBKt5fHOcizQ9kHtb2Bf1e5vE:4W1NAYKaQCHtb2VY+

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__	81c56ebb5ce329cbde207a7bc43e71d90375ec932fd292436341ae212cfda275.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\SystemBiosVersion	81c56ebb5ce329cbde207a7bc43e71d90375ec932fd292436341ae212cfda275.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	81c56ebb5ce329cbde207a7bc43e71d90375ec932fd292436341ae212cfda275.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-1-5-21-3350944739-639801879-157714471-1000\Software\Wine	81c56ebb5ce329cbde207a7bc43e71d90375ec932fd292436341ae212cfda275.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
1716	81c56ebb5ce329cbde207a7bc43e71d90375ec932fd292436341ae212cfda275.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
3064	1716	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	81c56ebb5ce329cbde207a7bc43e71d90375ec932fd292436341ae212cfda275.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1716	81c56ebb5ce329cbde207a7bc43e71d90375ec932fd292436341ae212cfda275.exe
1716	81c56ebb5ce329cbde207a7bc43e71d90375ec932fd292436341ae212cfda275.exe

C:\Users\Admin\AppData\Local\Temp\81c56ebb5ce329cbde207a7bc43e71d90375ec932fd292436341ae212cfda275.exe
"C:\Users\Admin\AppData\Local\Temp\81c56ebb5ce329cbde207a7bc43e71d90375ec932fd292436341ae212cfda275.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:1716
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1716 -s 632
  2⤵
  - Program crash
  PID:3064

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 1716 -ip 1716
1⤵
PID:4052

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\VKYZDMA5\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/1716-12-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/1716-2-0x0000000000401000-0x0000000000426000-memory.dmp

Filesize
148KB

Download
memory/1716-18-0x0000000000400000-0x0000000000C4E000-memory.dmp

Filesize
8.3MB

Download
memory/1716-19-0x0000000000401000-0x0000000000426000-memory.dmp

Filesize
148KB

Download
memory/1716-6-0x0000000000400000-0x0000000000C4E000-memory.dmp

Filesize
8.3MB

Download
memory/1716-7-0x0000000000400000-0x0000000000C4E000-memory.dmp

Filesize
8.3MB

Download
memory/1716-8-0x0000000000400000-0x0000000000C4E000-memory.dmp

Filesize
8.3MB

Download
memory/1716-0-0x0000000000400000-0x0000000000C4E000-memory.dmp

Filesize
8.3MB

Download
memory/1716-41-0x0000000000401000-0x0000000000426000-memory.dmp

Filesize
148KB

Download
memory/1716-3-0x0000000000400000-0x0000000000C4E000-memory.dmp

Filesize
8.3MB

Download
memory/1716-4-0x0000000000400000-0x0000000000C4E000-memory.dmp

Filesize
8.3MB

Download
memory/1716-21-0x0000000000400000-0x0000000000C4E000-memory.dmp

Filesize
8.3MB

Download
memory/1716-1-0x00000000776F4000-0x00000000776F6000-memory.dmp

Filesize
8KB

Download
memory/1716-23-0x0000000000400000-0x0000000000C4E000-memory.dmp

Filesize
8.3MB

Download
memory/1716-28-0x0000000000400000-0x0000000000C4E000-memory.dmp

Filesize
8.3MB

Download
memory/1716-34-0x0000000000400000-0x0000000000C4E000-memory.dmp

Filesize
8.3MB

Download
memory/1716-40-0x0000000000400000-0x0000000000C4E000-memory.dmp

Filesize
8.3MB

Download
memory/1716-16-0x0000000000400000-0x0000000000C4E000-memory.dmp

Filesize
8.3MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads