MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ab980575f1abd51f4401c6785345649318444b681eb56880028046936cecc3da. 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

GuLoader

Vendor detections: 10

Intelligence 10 IOCs YARA 2 File information Comments

SHA256 hash:	ab980575f1abd51f4401c6785345649318444b681eb56880028046936cecc3da
SHA3-384 hash:	2cd184f6c48897d6de9dc62c5331a658c9f0194a70487658f68fb49405bacd9d2799ca601dc69ee91fa1f8c6ca636759
SHA1 hash:	916a64f434ae64dce46b34fb6dd2681071fb1519
MD5 hash:	f82abfee362eb0ae62564d1d823dd255
humanhash:	stairway-bravo-eighteen-solar
File name:	PO-C - 20211213-PLATE.doc
Download:	download sample
Signature	GuLoader Create hunting rule
File size:	1'903'985 bytes
First seen:	2022-01-21 01:58:07 UTC
Last seen:	2022-01-21 08:07:49 UTC
File type:	doc
MIME type:	text/rtf
ssdeep	12288:Q5kVmRDzd/wLCcW9w19AhSjKcpBWZYtW5/vnk2gX/rF7:Q+mV2tW21ESe6BWWk/6
TLSH	T1FA9556F0AD01D4C1F5BE5B6AF2FD3A48A1343217EBC94A4A00E7E5551EF6A11B90ECC9
Reporter	AndreGironda
Tags:	AgentTesla CVE-2017-11882 doc GuLoader rtf

AndreGironda

MITRE T1566.001
Date: Fri, 21 Jan 2022 03:30-04:00 +0300
Received: from vhost01.studioproteus.net (193.9.52.11)
From: Katerina Nikoli <website@eais.uk>
To: undisclosed-recipients:;
Subject: AWS: new order /Proforma-Invoice / Order Confirmation AB22-00569
Message-ID: <fa57b45bf0403f8618bcf371ab8ae569@eais.uk>
X-Sender: website@eais.uk
User-Agent: Roundcube Webmail/1.3.6
Return-Path: website@eais.uk

Intelligence

File Origin

# of uploads :

# of downloads :

389

Origin country :

n/a

Vendor Threat Intelligence

Verdict:

Malicious

File type:

application/msword

Has a screenshot:

False

Contains macros:

False

Detection(s):

Sanesecurity.Malware.27301.RtfHeur.BadVer.UNOFFICIAL

TwinWave.EvilDoc.RTFFakeVersionWithObjUpdateUKSurfMix.20200514.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

Searching for synchronization primitives

Launching a process

Creating a window

DNS request

Creating a file in the %AppData% directory

Creating a file in the %temp% directory

Creating a file

Sending an HTTP GET request

Creating a process from a recently created file

Result

Verdict:

Malicious

File Type:

Fake RTF File

Link:

https://app.docguard.net/ab980575f1abd51f4401c6785345649318444b681eb56880028046936cecc3da/results/dashboard

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

control.exe embedequation exploit shell32.dll shellcode

Link:

https://www.filescan.io/uploads/61ea136bd32385db631238f5/reports/54e55849-cdeb-431a-aabf-77cd097eff19/overview

Result

Verdict:

MALICIOUS

Result

Threat name:

GuLoader

Detection:

malicious

Classification:

troj.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/924909

Signature

Antivirus detection for dropped file

Antivirus detection for URL or domain

C2 URLs / IPs found in malware configuration

Found malware configuration

Multi AV Scanner detection for domain / URL

Multi AV Scanner detection for submitted file

Office equation editor drops PE file

Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)

Sigma detected: Droppers Exploiting CVE-2017-11882

Sigma detected: EQNEDT32.EXE connecting to internet

Sigma detected: File Dropped By EQNEDT32EXE

Tries to detect virtualization through RDTSC time measurements

Yara detected GuLoader

Behaviour

Behavior Graph:

Download SVG

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/ab980575f1abd51f4401c6785345649318444b681eb56880028046936cecc3da/

Threat name:

Document-RTF.Exploit.CVE-2017-11882

Status:

Malicious

First seen:

2022-01-20 23:54:41 UTC

File Type:

Document

Extracted files:

AV detection:

22 of 43 (51.16%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=vomak5prvpkr6rabyz4fgrlesmmeis3id22wraacqbdjg3hmypna._file

Result

Malware family:

n/a

Score:

8/10

Tags:

persistence

Link:

https://tria.ge/reports/220121-cee3facghq/

Behaviour

Checks processor information in registry

Enumerates system info in registry

Launches Equation Editor

Modifies Internet Explorer settings

Modifies data under HKEY_USERS

Modifies registry class

Suspicious behavior: AddClipboardFormatListener

Suspicious use of FindShellTrayWindow

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Office loads VBA resources, possible macro or embedded object present

Enumerates physical storage devices

Drops file in Windows directory

Loads dropped DLL

Blocklisted process makes network request

Downloads MZ/PE file

Executes dropped EXE

Sets service image path in registry

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/ab980575f1ab/report/overview.html

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

Threat name:

Malicious File

Score:

0.96

Link:

https://yomi.yoroi.company/submissions/ab980575f1abd51f4401c6785345649318444b681eb56880028046936cecc3da

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:	INDICATOR_RTF_EXPLOIT_CVE_2017_11882_4 Create hunting rule
Author:	ditekSHen
Description:	detects RTF variant documents potentially exploiting CVE-2018-0802 or CVE-2017-11882

Rule name:	INDICATOR_RTF_MalVer_Objects Create hunting rule
Author:	ditekSHen
Description:	Detects RTF documents with non-standard version and embeding one of the object mostly observed in exploit documents.