MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8f5a841c737e4c5d91f91f104773cb5f734ced65260c08957740352fba01d48d. 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

ZLoader

Vendor detections: 8

Maldoc score: 3

Intelligence 8 IOCs YARA 5 File information Comments

SHA256 hash:	8f5a841c737e4c5d91f91f104773cb5f734ced65260c08957740352fba01d48d
SHA3-384 hash:	5530be4806298d483c0fd947baf9c6ec79714657f1913d6ba0e3d3b561bf32c9e28722f843a9f857f8f80ddcd32271a2
SHA1 hash:	30adc6091ed9b09839b2a396437cb172cd8f9777
MD5 hash:	d954ed8c20ab4924b5475a840f7d0c4f
humanhash:	fruit-sink-ack-south
File name:	case_inv_5477.xls
Download:	download sample
Signature	ZLoader Create hunting rule
File size:	31'744 bytes
First seen:	2021-01-20 20:57:20 UTC
Last seen:	2021-01-20 22:50:28 UTC
File type:	xls
MIME type:	application/vnd.ms-excel
ssdeep	768:oPXk3hbdlylKsgqopeJBWhZFGkE+cL2NdAJUjPI8++H1H:EXk3hbdlylKsgqopeJBWhZFGkE+cL2Nv
TLSH	B5E262E7F6C6AD45CA59033948AB83A07713FC655BAB938B2349F3291FB1BC04A03557
Reporter	cocaman
Tags:	xls ZLoader

cocaman

Malicious email (T1566.001)
From: ""Branden G. Cutter" <centralnotification@amethystwinds.com>" (likely spoofed)
Received: "from amethystwinds.com (amethystwinds.com [62.210.53.40]) "
Date: "Wed, 20 Jan 2021 16:37:58 +0000"
Subject: "Invoice info#827569"
Attachment: "case_inv_5477.xls"

Office OLE Information

This malware samples appears to be an Office document. The following table provides more information about this document using oletools and oledump.

OLE id

Maldoc score: 3

Application name is Microsoft Excel

Office document is in OLE format

OLE dump

MalwareBazaar was able to identify 3 sections in this file using oledump:

Section ID	Section size	Section name
1	4096 bytes	DocumentSummaryInformation
2	4096 bytes	SummaryInformation
3	21639 bytes	Workbook

OLE vba

MalwareBazaar was able to extract and deobfuscate VBA script(s) the following information from OLE objects embedded in this file using olevba:

Type	Keyword	Description
AutoExec	Auto_Open	Runs when the Excel Workbook is opened
Suspicious	Base64 Strings	Base64-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence

File Origin

# of uploads :

# of downloads :

163

Origin country :

n/a

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

case_inv_5477.xls

Verdict:

No threats detected

Analysis date:

2021-01-20 21:00:06 UTC

Tags:

macros

Link:

https://app.any.run/tasks/5d12529d-8d2b-495c-9ce4-e73659da737b

Note:

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

Verdict:

Malicious

File type:

application/vnd.ms-excel

Has a screenshot:

False

Contains macros:

True

Detection(s):

TwinWave.EvilDoc.ZloaderUnicodeRoadToNoWhere.20200720.UNOFFICIAL

TwinWave.EvilDoc.ZloaderUnicodeRoadToNoWherePartDuex.20200730.UNOFFICIAL

TwinWave.EvilDoc.Zloader.ComfortablyNumb.M3.20201208.UNOFFICIAL

TwinWave.EvilDoc.Excel4.BlackSubmarines.2020.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Creating a file

Creating a process with a hidden window

Possible injection to a system process

Launching a process by exploiting the app vulnerability

Creating a process from a recently created file

Result

Verdict:

Malicious

File Type:

Legacy Office File

Link:

https://app.docguard.net/8f5a841c737e4c5d91f91f104773cb5f734ced65260c08957740352fba01d48d/results/dashboard

Result

Threat name:

Unknown

Detection:

malicious

Classification:

spre.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/586690

Signature

Document exploit detected (creates forbidden files)

Document exploit detected (process start blacklist hit)

Injects code into the Windows Explorer (explorer.exe)

Microsoft Office drops suspicious files

Multi AV Scanner detection for submitted file

Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)

Potential malicious VBS script found (has network functionality)

Potential malicious VBS script found (suspicious strings)

System process connects to network (likely due to code injection or exploit)

Yara detected Run DLL Via DCOM

Yara detected VBS Downloader Generic

Behaviour

Behavior Graph:

Download SVG

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/8f5a841c737e4c5d91f91f104773cb5f734ced65260c08957740352fba01d48d/

Threat name:

Script.Trojan.Heuristic

Status:

Malicious

First seen:

2021-01-20 20:58:05 UTC

File Type:

Document

Extracted files:

AV detection:

7 of 46 (15.22%)

Threat level:

2/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=r5niihdtpzgf3epzd4ieo46ll5zuz3lfeygarflxia2s7oqb2sgq._file

Result

Malware family:

n/a

Score:

10/10

Tags:

macro ransomware xlm

Link:

https://tria.ge/reports/210120-at7155k2j2/

Behaviour

Enumerates system info in registry

Modifies Internet Explorer settings

Suspicious behavior: AddClipboardFormatListener

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of SetWindowsHookEx

Checks processor information in registry

Enumerates physical storage devices

JavaScript code in executable

Malware Config

Dropper Extraction:

https://flixliste.com/k.php

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

Threat name:

ZLoader

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/8f5a841c737e4c5d91f91f104773cb5f734ced65260c08957740352fba01d48d

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:	Email_stealer_bin_mem Create hunting rule
Author:	James_inthe_box
Description:	Email in files like avemaria

Rule name:	IPPort_combo_mem Create hunting rule
Author:	James_inthe_box
Description:	IP and port combo

Rule name:	Select_from_enumeration Create hunting rule
Author:	James_inthe_box
Description:	IP and port combo

Rule name:	SharedStrings Create hunting rule
Author:	Katie Kleemola
Description:	Internal names found in LURK0/CCTV0 samples

Rule name:	UAC_bypass_bin_mem Create hunting rule
Author:	James_inthe_box
Description:	UAC bypass in files like avemaria

File information

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

Malspam

ZLoader

xls 8f5a841c737e4c5d91f91f104773cb5f734ced65260c08957740352fba01d48d

(this sample)

Delivery method

Distributed via e-mail attachment

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