MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c91aa7e772a145d0266b4eb22f3527008ae88380a6155fe2ee9b5b27dfc6e1b7. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry

GCleaner

Vendor detections: 14

Intelligence 14 IOCs YARA 6 File information Comments

SHA256 hash:	c91aa7e772a145d0266b4eb22f3527008ae88380a6155fe2ee9b5b27dfc6e1b7
SHA3-384 hash:	c080813bbde8c2263b0ef4f295132875f0b1254c0aa3d3b1c43b719f5c7523243a9f86fc0671af31aab036871eeff3ae
SHA1 hash:	8e697db8760923d3e435838b800ac0b299354e4a
MD5 hash:	aa7e6e2d17f38f4f790210e1fe79b75e
humanhash:	stream-mirror-kansas-fish
File name:	SecuriteInfo.com.BScope.Trojan.Zenpak.19405.26576
Download:	download sample
Signature	GCleaner Create hunting rule
File size:	322'048 bytes
First seen:	2024-08-26 12:25:24 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	383b17ea11003a6fea120e634c4cb58e (2 x GCleaner)
ssdeep	6144:x0Bn6BnSMiKcelg/f/IDLtolr/JhXxPHOI9zOWoJ:x0Bn6BGFehtoBJ3J9
Threatray	9 similar samples on MalwareBazaar
TLSH	T15A64CF11B6B0A476FEBE573409B1DEA849FB7C126A71524E26F0362F2DB32C04E65347
TrID	47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13) 15.9% (.EXE) Win64 Executable (generic) (10523/12/4) 9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 7.6% (.EXE) Win16 NE executable (generic) (5038/12/1) 6.8% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika	pebin
File icon (PE):
dhash icon	006cccd0d6ec3152 (2 x GCleaner)
Reporter	SecuriteInfoCom
Tags:	exe gcleaner

Intelligence

File Origin

# of uploads :

# of downloads :

373

Origin country :

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

univ.exe

Verdict:

Malicious activity

Analysis date:

2024-08-26 11:16:59 UTC

Tags:

gcleaner loader

Link:

https://app.any.run/tasks/3a699872-7ad7-4ccf-bb5a-7f19f86ec727

Note:

ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample

Detection(s):

SecuriteInfo.com.BScope.Trojan.Zenpak.19405.26576.UNOFFICIAL

Verdict:

Malicious

Score:

99.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=66cc746db2a4681a7296a7a4

Tags:

Infostealer Network Stealth Zpack

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

Creating a window

Creating a file in the %temp% subdirectories

Creating a file

Сreating synchronization primitives

Running batch commands

Creating a process with a hidden window

Launching the default Windows debugger (dwwin.exe)

Using the Windows Management Instrumentation requests

Connection attempt to an infection source

Launching a tool to kill processes

Sending an HTTP GET request to an infection source

Verdict:

Unknown

Threat level:

2.5/10

Confidence:

100%

Tags:

epmicrosoft_visual_cc fingerprint microsoft_visual_cc

Link:

https://www.filescan.io/uploads/66cc746758cbff3e3abd9dfc/reports/23595028-71ed-4e02-9a48-3902a6a36da4/overview

Verdict:

Malicious

Labled as:

Malware

Link:

https://www.hybrid-analysis.com/sample/c91aa7e772a145d0266b4eb22f3527008ae88380a6155fe2ee9b5b27dfc6e1b7

Result

Verdict:

MALICIOUS

Details

Windows PE Executable

Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/71ea82e8-b27b-4961-a39c-c291c2bcabfa

Result

Threat name:

GCleaner, Nymaim

Detection:

malicious

Classification:

troj.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1499010

Signature

AI detected suspicious sample

Antivirus detection for URL or domain

C2 URLs / IPs found in malware configuration

Detected unpacking (changes PE section rights)

Detected unpacking (overwrites its own PE header)

Found malware configuration

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for domain / URL

Multi AV Scanner detection for submitted file

Yara detected GCleaner

Yara detected Nymaim

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/c91aa7e772a145d0266b4eb22f3527008ae88380a6155fe2ee9b5b27dfc6e1b7

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/c91aa7e772a145d0266b4eb22f3527008ae88380a6155fe2ee9b5b27dfc6e1b7/

Threat name:

Win32.Trojan.GCleaner

Status:

Malicious

First seen:

2024-08-26 11:17:01 UTC

File Type:

PE (Exe)

Extracted files:

AV detection:

18 of 24 (75.00%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=zenkpz3sufc5ajtlj2zc6njhacfora4auykv7yxotnnspx6g4g3q._file

Verdict:

malicious

GCleaner

54330d7c8d654c7821fdd80c29bbad67e1f959fb668a63c433348182f879a101

GCleaner

9ab39edf384daac9f1c4e6b44e7af427618696b1d0b4d04d737a1e06b412c09b

GCleaner

b26c331dd8cc9afc8cfea552033a91a2fd57af71829498f7280408e814d9d962

GCleaner

c91aa7e772a145d0266b4eb22f3527008ae88380a6155fe2ee9b5b27dfc6e1b7

GCleaner

Result

Malware family:

gcleaner

Score:

10/10

Tags:

family:gcleaner discovery loader

Link:

https://tria.ge/reports/240826-pl8dsatbqh/

Behaviour

Kills process with taskkill

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

Program crash

System Location Discovery: System Language Discovery

Checks computer location settings

Deletes itself

Loads dropped DLL

Downloads MZ/PE file

GCleaner

Malware Config

C2 Extraction:

80.66.75.114

Verdict:

Suspicious

Tags:

n/a

YARA:

n/a

Link:

https://app.threat.zone/submission/5b10076c-d37e-4e68-9a35-4251ff252121

Unpacked files

SH256 hash:

e3752915e9b12609fa22a99275111e4533903ad3af8ca01419562a2871a5c071

MD5 hash:

df84064620e647c9f8ad0f966c1f1576

SHA1 hash:

f7427ed939f043601f270eb9c7b8f685328574ae

Detections:

GCleaner

win_gcleaner_auto

Link:

https://www.unpac.me/results/5f7a72b9-97a9-4aac-af74-4cf0a1af057a/

Parent samples :

b26c331dd8cc9afc8cfea552033a91a2fd57af71829498f7280408e814d9d962
54330d7c8d654c7821fdd80c29bbad67e1f959fb668a63c433348182f879a101
04005821bb6ca54143febc9434856e4ac7e4f6ba61cfcecfb4c1f7f25301f3ca
c91aa7e772a145d0266b4eb22f3527008ae88380a6155fe2ee9b5b27dfc6e1b7
21feed85dcffec9c7a76343729beecd6a53ffe854d972af207edddf154da1814

SH256 hash:

c91aa7e772a145d0266b4eb22f3527008ae88380a6155fe2ee9b5b27dfc6e1b7

MD5 hash:

aa7e6e2d17f38f4f790210e1fe79b75e

SHA1 hash:

8e697db8760923d3e435838b800ac0b299354e4a

Link:

https://www.unpac.me/results/5f7a72b9-97a9-4aac-af74-4cf0a1af057a/

Please note that we are no longer able to provide a coverage score for Virus Total.

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:	DebuggerCheck__API Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	DebuggerHiding__Active Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	pe_detect_tls_callbacks Create hunting rule

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

GCleaner

exe c91aa7e772a145d0266b4eb22f3527008ae88380a6155fe2ee9b5b27dfc6e1b7

(this sample)

URLhaus

https://urlhaus.abuse.ch/url/3129043/

Delivery method

Distributed via web download

URLhaus

https://urlhaus.abuse.ch/url/3112908/

URLhaus

https://urlhaus.abuse.ch/url/3112906/

URLhaus

https://urlhaus.abuse.ch/url/3112907/

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings

ID	Title	Severity
CHECK_AUTHENTICODE	Missing Authenticode	high
CHECK_DLL_CHARACTERISTICS	Missing dll Security Characteristics (HIGH_ENTROPY_VA)	high
CHECK_NX	Missing Non-Executable Memory Protection	critical
CHECK_PIE	Missing Position-Independent Executable (PIE) Protection	high

Reviews

ID	Capabilities	Evidence
WIN_BASE_API	Uses Win Base API	KERNEL32.dll::TerminateProcess KERNEL32.dll::LoadLibraryW KERNEL32.dll::GetStartupInfoA KERNEL32.dll::GetStartupInfoW KERNEL32.dll::GetCommandLineA
WIN_BASE_EXEC_API	Can Execute other programs	KERNEL32.dll::WriteConsoleOutputW KERNEL32.dll::SetConsoleMode KERNEL32.dll::GetConsoleAliasesLengthW KERNEL32.dll::GetConsoleAliasExesLengthA
WIN_BASE_IO_API	Can Create Files	KERNEL32.dll::CreateDirectoryA
WIN_BASE_USER_API	Retrieves Account Information	KERNEL32.dll::GetComputerNameW

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