MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d2a97f311b3bf210efefdb3cee8178eabd5b8ac18ceb0090e497361af3263fc0. 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: 12

Intelligence 12 IOCs YARA 2 File information Comments 1

SHA256 hash:	d2a97f311b3bf210efefdb3cee8178eabd5b8ac18ceb0090e497361af3263fc0
SHA3-384 hash:	63082375b74cec8dc14107d626e096d3c1aa9c612b873d190241267a229e5dd42b4ec549e2d91845f3df9d7f9aedc8c8
SHA1 hash:	4204ba7013dae3cbba34a243bee0f61a57e739f8
MD5 hash:	cf10ad8d071bdc6a1484814721484f1a
humanhash:	winter-bravo-harry-lake
File name:	cf10ad8d071bdc6a1484814721484f1a
Download:	download sample
Signature	GuLoader Create hunting rule
File size:	72'130 bytes
First seen:	2024-03-21 17:42:55 UTC
Last seen:	2024-03-21 19:48:02 UTC
File type:	rtf
MIME type:	text/rtf
ssdeep	1536:UBJJZKzkwVbJ4HdEMazXoafVk/m4Fk8lmH1bo:UBjZkpE6MazXfVkDFk8lmHRo
TLSH	T16163D16AE74F0915DF55A67B034A4B4A09FCB33D738500B139BCA7743BAD81E4A6287C
Reporter	zbetcheckin
Tags:	CVE-2017-11882 GuLoader rtf

Intelligence

File Origin

# of uploads :

# of downloads :

124

Origin country :

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

DHL Express - Shipment Notification.eml

Verdict:

Malicious activity

Analysis date:

2024-03-21 08:30:46 UTC

Tags:

phishing phishing-xls opendir

Link:

https://app.any.run/tasks/e9f7565e-94a9-4ba7-91d0-b1d06ecbff3e

Note:

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

Verdict:

Legit

File type:

application/rtf

Has a screenshot:

False

Contains macros:

False

Detection(s):

Sanesecurity.Shelter.Malware.BadRtf.ObjUpd.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

Searching for synchronization primitives

Launching a process

Using the Windows Management Instrumentation requests

Creating a window

Sending an HTTP GET request to an infection source by exploiting the app vulnerability

Creating a file in the %AppData% directory

Сreating synchronization primitives

Creating a file in the %AppData% subdirectories

Changing an executable file

Creating a file

Creating a file in the %temp% directory

Launching a service

Delayed reading of the file

Launching a file downloaded from the Internet

Connection attempt to an infection source by exploiting the app vulnerability

Creating a process from a recently created file

Result

Verdict:

Malicious

File Type:

RTF File

Link:

https://app.docguard.net/d2a97f311b3bf210efefdb3cee8178eabd5b8ac18ceb0090e497361af3263fc0/results/dashboard

Behaviour

BlacklistAPI detected

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

embedequation exploit lolbin shell32 shellcode

Link:

https://www.filescan.io/uploads/65fc71aec1137bbf14a089a2/reports/a3ddca51-7cec-4eff-8fc2-1205014322ff/overview

Verdict:

Malicious

Labled as:

CVE-2017-11882

Link:

https://www.hybrid-analysis.com/sample/d2a97f311b3bf210efefdb3cee8178eabd5b8ac18ceb0090e497361af3263fc0

Result

Threat name:

GuLoader

Detection:

malicious

Classification:

troj.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1413460

Signature

Antivirus / Scanner detection for submitted sample

Antivirus detection for URL or domain

Document exploit detected (process start blacklist hit)

Machine Learning detection for dropped file

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Office equation editor drops PE file

Office equation editor establishes network connection

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

Shellcode detected

Sigma detected: EQNEDT32.EXE connecting to internet

Sigma detected: Equation Editor Network Connection

Sigma detected: File Dropped By EQNEDT32EXE

Sigma detected: Suspicious Binary In User Directory Spawned From Office Application

Sigma detected: Suspicious Microsoft Office Child Process

Snort IDS alert for network traffic

Tries to detect virtualization through RDTSC time measurements

Yara detected GuLoader

Behaviour

Behavior Graph:

Download SVG

Score:

99%

Verdict:

Malware

File Type:

SCRIPT

Link:

https://malprob.io/report/d2a97f311b3bf210efefdb3cee8178eabd5b8ac18ceb0090e497361af3263fc0

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/d2a97f311b3bf210efefdb3cee8178eabd5b8ac18ceb0090e497361af3263fc0/

Threat name:

Document-RTF.Exploit.CVE-2017-11882

Status:

Malicious

First seen:

2024-03-20 21:45:53 UTC

File Type:

Document

Extracted files:

AV detection:

21 of 38 (55.26%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=2kux6mi3hpzbb37p3m6o5aly5k6vxcwbrtvqbehes43bv4zgh7aa._file

Result

Malware family:

guloader

Score:

10/10

Tags:

family:guloader downloader

Link:

https://tria.ge/reports/240321-waka5sdf38/

Behaviour

Checks processor information in registry

Enumerates system info in registry

Launches Equation Editor

Modifies Internet Explorer settings

Modifies registry class

Suspicious behavior: AddClipboardFormatListener

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of FindShellTrayWindow

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

NSIS installer

Office loads VBA resources, possible macro or embedded object present

Enumerates physical storage devices

Drops file in Windows directory

Suspicious use of NtCreateThreadExHideFromDebugger

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Legitimate hosting services abused for malware hosting/C2

Executes dropped EXE

Loads dropped DLL

Blocklisted process makes network request

Downloads MZ/PE file

Guloader,Cloudeye

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/d2a97f311b3b/report/overview.html

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

Threat name:

Malicious File

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/d2a97f311b3bf210efefdb3cee8178eabd5b8ac18ceb0090e497361af3263fc0

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_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.

Rule name:	SUSP_INDICATOR_RTF_MalVer_Objects Create hunting rule
Author:	ditekSHen
Description:	Detects RTF documents with non-standard version and embedding one of the object mostly observed in exploit (e.g. CVE-2017-11882) documents.
Reference:	https://github.com/ditekshen/detection

File information

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

Web download

GuLoader

rtf d2a97f311b3bf210efefdb3cee8178eabd5b8ac18ceb0090e497361af3263fc0

(this sample)

Delivery method

Distributed via web download

URLhaus

https://urlhaus.abuse.ch/url/2789062/

Comments

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zbet commented on 2024-03-21 17:42:56 UTC

url : hxxp://103.237.87.56/xampp/xnv/xn/kissmydearuarereallysweetformetounderstandverycuteladyyouareiloveryoussoomuchto___mybabygirlyouareinmydear.doc