MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b28544713d74e229e251d11b415a48e118c75015a520f16c21005e4d78a22d5f. 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

Formbook

Vendor detections: 8

Intelligence 8 IOCs YARA 2 File information Comments

SHA256 hash:	b28544713d74e229e251d11b415a48e118c75015a520f16c21005e4d78a22d5f
SHA3-384 hash:	0d2fa9ffd822681b95b59bb1306cce381016a2ea87eef9153480b515ab4120b7accfbea5f743deef097a1c7ba19e4e71
SHA1 hash:	6b95fb3941f3beafaf660829f8045b1a0153c2f4
MD5 hash:	53ff37a6a2c349401d844564e6c08681
humanhash:	magnesium-snake-mango-nevada
File name:	2024041342836038.iso
Download:	download sample
Signature	Formbook Create hunting rule
File size:	866'304 bytes
First seen:	2024-04-16 07:17:33 UTC
Last seen:	Never
File type:	iso
MIME type:	application/x-iso9660-image
ssdeep	12288:1OyBItc6c4ASOSjM0rp7Z3lYFNiooPsND1kz7FgCa2+mSP2iYZ367TCIhhDu:vW2zuOSjrrpxG9oETe7iCa2LUnCyh
TLSH	T1F1051210F991949FC91129B204E2FB79F6AEED432D218D137B1D3B9FAB3EA446905703
TrID	88.5% (.NULL) null bytes (2048000/1) 11.0% (.HTP) HomeLab/BraiLab Tape image (256000/1) 0.2% (.ATN) Photoshop Action (5007/6/1) 0.1% (.ISO) ISO 9660 CD image (2545/36/1) 0.0% (.BIN/MACBIN) MacBinary 1 (1033/5)
Reporter	cocaman
Tags:	FormBook iso

cocaman

Malicious email (T1566.001)
From: "Susanne Schreur <biserka.jovanovic@globos.rs>" (likely spoofed)
Received: "from server.maderasriosegura.com (server.maderasriosegura.com [212.227.37.135]) "
Date: "Mon, 15 Apr 2024 17:44:48 +0300"
Subject: "=?UTF-8?Q?Zahlungsbest=C3=A4tigung?="
Attachment: "2024041342836038.iso"

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

File Archive Information

This file archive contains 1 file(s), sorted by their relevance:

File name:	2024041342836038.exe
File size:	803'880 bytes
SHA256 hash:	c5e3dc39412f2f8efb97c3c6bcdc235727caf646ee2ac7c23e77c11ce0783e15
MD5 hash:	2c430d35e36d912bda726e384615c0e7
MIME type:	application/x-dosexec
Signature	Formbook

Vendor Threat Intelligence

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

context-iso installer lolbin overlay packed shell32

Link:

https://www.filescan.io/uploads/661e262ac5dabc22b2005d74/reports/8478eb3e-2402-4244-8644-442c4c24c35e/overview

Verdict:

Suspicious

Labled as:

Injector.YIPC

Link:

https://www.hybrid-analysis.com/sample/b28544713d74e229e251d11b415a48e118c75015a520f16c21005e4d78a22d5f

Result

Verdict:

MALICIOUS

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/b28544713d74e229e251d11b415a48e118c75015a520f16c21005e4d78a22d5f/

Threat name:

Win32.Trojan.GuLoader

Status:

Malicious

First seen:

2024-04-15 15:08:41 UTC

File Type:

Binary (Archive)

Extracted files:

AV detection:

15 of 36 (41.67%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=wkcui4j5otrctysr2enucwsi4emmouavuuqpc3bbabpe26fcfvpq._file

Result

Malware family:

guloader

Score:

10/10

Tags:

family:guloader downloader persistence

Link:

https://tria.ge/reports/240416-h68rqacb84/

Behaviour

Modifies registry key

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

Suspicious use of NtCreateThreadExHideFromDebugger

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Adds Run key to start application

Checks computer location settings

Loads dropped DLL

Guloader,Cloudeye

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/b28544713d74/report/overview.html

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

Threat name:

Formbook

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/b28544713d74e229e251d11b415a48e118c75015a520f16c21005e4d78a22d5f

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.