MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ca54737de1d00552533d1eb67a6bc2af75ccba06618337e265c1a76f0d65a8ac. 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

Stealc

Vendor detections: 16

Intelligence 16 IOCs YARA 10 File information Comments

SHA256 hash:	ca54737de1d00552533d1eb67a6bc2af75ccba06618337e265c1a76f0d65a8ac
SHA3-384 hash:	c90266e36475ec2b0d48ec674ab667802f0911459d84c787b03df91a235356acc0ee74e7ad9bb031a5d3b23ed795a8a7
SHA1 hash:	391a8266b03e235d699babd9c284bedf62bd4981
MD5 hash:	96d9720281558a0ca3bcb2745154e084
humanhash:	winner-robert-delta-ack
File name:	SecuriteInfo.com.Backdoor.Win32.Yobdam.16899.6551
Download:	download sample
Signature	Stealc Create hunting rule
File size:	1'433'088 bytes
First seen:	2023-10-23 14:32:50 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f5fcef2eacb86c1adad598b65c67a3ca (5 x MarsStealer, 1 x Stealc)
ssdeep	12288:bRgcdrhCHwfbv7rHMUtXe44Lzyneztxn+9WXH3ML:bmqewfbv7IwOlLzyneztxmWXH8
Threatray	816 similar samples on MalwareBazaar
TLSH	T1A5650613A1CE8D36E33E35386AF711B448983D80B664A8467FD87ECB0721A7965DD34E
TrID	55.4% (.SCR) Windows screen saver (13097/50/3) 19.0% (.EXE) Win32 Executable (generic) (4505/5/1) 8.5% (.EXE) OS/2 Executable (generic) (2029/13) 8.4% (.EXE) Generic Win/DOS Executable (2002/3) 8.4% (.EXE) DOS Executable Generic (2000/1)
Reporter	SecuriteInfoCom
Tags:	exe Stealc

Intelligence

File Origin

# of uploads :

# of downloads :

305

Origin country :

Vendor Threat Intelligence

Malware family:

oski

ID:

File name:

SecuriteInfo.com.Backdoor.Win32.Yobdam.16899.6551

Verdict:

Malicious activity

Analysis date:

2023-10-23 14:43:32 UTC

Tags:

stealc stealer oski

Link:

https://app.any.run/tasks/639877ef-021c-41d1-a008-67d93ae02e2a

Note:

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

Detection(s):

SecuriteInfo.com.Backdoor.Win32.Yobdam.16899.6551.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Сreating synchronization primitives

Creating a window

Searching for synchronization primitives

Launching the default Windows debugger (dwwin.exe)

Sending a custom TCP request

Gathering data

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

control keylogger lolbin masquerade shell32

Link:

https://www.filescan.io/uploads/653684215f371a3fc85f7ea2/reports/c02be73a-2556-4567-82d0-49018ce50776/overview

Verdict:

Malicious

Labled as:

Win/malicious_confidence_100%

Link:

https://www.hybrid-analysis.com/sample/ca54737de1d00552533d1eb67a6bc2af75ccba06618337e265c1a76f0d65a8ac

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.

Malware family:

Oski Stealer

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/a9bb6c42-a47f-4882-88a2-0cacdca8bd94

Result

Threat name:

CryptOne, Stealc

Detection:

malicious

Classification:

troj.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1330657

Signature

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 evasive API chain (may stop execution after checking locale)

Found malware configuration

Machine Learning detection for sample

Sample uses string decryption to hide its real strings

Yara detected CryptOne packer

Yara detected Stealc

Behaviour

Behavior Graph:

Download SVG

Score:

73%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/ca54737de1d00552533d1eb67a6bc2af75ccba06618337e265c1a76f0d65a8ac

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/ca54737de1d00552533d1eb67a6bc2af75ccba06618337e265c1a76f0d65a8ac/

Threat name:

Win32.Trojan.Stealc

Status:

Malicious

First seen:

2023-10-23 15:34:09 UTC

AV detection:

20 of 37 (54.05%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=zjkhg7pb2acveuz5d23hu26cv524zoqgmgbtpytfygtw6dlfvcwa._file

Verdict:

malicious

Result

Malware family:

stealc

Score:

10/10

Tags:

family:stealc discovery stealer

Link:

https://tria.ge/reports/231023-rwvlsahc41/

Behaviour

Checks processor information in registry

Suspicious behavior: EnumeratesProcesses

Suspicious use of UnmapMainImage

Program crash

Checks installed software on the system

Stealc

Malware Config

C2 Extraction:

http://tetromask.site

Unpacked files

SH256 hash:

4514dc2fd487de020a07d20fa24c442c5c230e6e4bf668c50022878d75536979

MD5 hash:

6ab4eb0ab579fed49cebd98ba32feb3e

SHA1 hash:

04fab28654315ee6dd5789058fb8cad0ba5d140b

Detections:

stealc

Link:

https://www.unpac.me/results/d8498eac-0655-4d3d-881e-7a059e371445/

Parent samples :

ca54737de1d00552533d1eb67a6bc2af75ccba06618337e265c1a76f0d65a8ac
81dc4e840be63ced06cf2949a358127e2f9e7bbf917aeea7181a46ab58353f75
48b5a4f81d9cdcc637aeb99f3485a2dbd67f2f64744326b06e2d8d55a70be47d

SH256 hash:

ca54737de1d00552533d1eb67a6bc2af75ccba06618337e265c1a76f0d65a8ac

MD5 hash:

96d9720281558a0ca3bcb2745154e084

SHA1 hash:

391a8266b03e235d699babd9c284bedf62bd4981

Link:

https://www.unpac.me/results/d8498eac-0655-4d3d-881e-7a059e371445/

Malware family:

Stealc

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/ca54737de1d0/report/overview.html

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:	Borland Create hunting rule
Author:	malware-lu

Rule name:	detect_Mars_Stealer Create hunting rule
Author:	@malgamy12
Description:	detect_Mars_Stealer

Rule name:	infostealer_win_stealc_standalone Create hunting rule
Description:	Find standalone Stealc sample based on decryption routine or characteristic strings
Reference:	https://blog.sekoia.io/stealc-a-copycat-of-vidar-and-raccoon-infostealers-gaining-in-popularity-part-1/

Rule name:	maldoc_find_kernel32_base_method_1 Create hunting rule
Author:	Didier Stevens (https://DidierStevens.com)

Rule name:	maldoc_getEIP_method_1 Create hunting rule
Author:	Didier Stevens (https://DidierStevens.com)

Rule name:	meth_get_eip Create hunting rule
Author:	Willi Ballenthin

Rule name:	meth_stackstrings Create hunting rule
Author:	Willi Ballenthin

Rule name:	shellcode Create hunting rule
Author:	nex
Description:	Matched shellcode byte patterns

Rule name:	win_stealc_w0 Create hunting rule
Author:	crep1x
Description:	Find standalone Stealc sample based on decryption routine or characteristic strings
Reference:	https://blog.sekoia.io/stealc-a-copycat-of-vidar-and-raccoon-infostealers-gaining-in-popularity-part-1/

Rule name:	yarahub_win_stealc_bytecodes_oct_2023 Create hunting rule
Author:	Matthew @ Embee_Research

File information

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

No further information available

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