MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f81e9d9b8ff30bd03215a97167b1871b8f494e8846889b80457476c817ea46b5. 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 7 File information Comments

SHA256 hash:	f81e9d9b8ff30bd03215a97167b1871b8f494e8846889b80457476c817ea46b5
SHA3-384 hash:	86f2c2f088b79994b32d26f963249871d82f76636fc9c465acba36265ffa2e0ba1f62d8c461ed81e6e540f1eda5bf6de
SHA1 hash:	8060e294d48e5bc4f3620e37d9ff1a05a70fd179
MD5 hash:	2dc03f3b6e3c42702134b27b85c1a7f6
humanhash:	five-quebec-stream-maine
File name:	notif-3615.xls
Download:	download sample
Signature	ZLoader Create hunting rule
File size:	31'744 bytes
First seen:	2021-01-25 18:28:24 UTC
Last seen:	Never
File type:	xls
MIME type:	application/vnd.ms-excel
ssdeep	768:/nPXk3hbdlylKsgqopeJBWhZFGkE+cL2NdAJiW8SsYkV:nXk3hbdlylKsgqopeJBWhZFGkE+cL2NP
TLSH	43E262E7B7C6AC49CA59477A086B83A07717FC522BA7838B3345F3292F726C08943557
Reporter	cocaman
Tags:	xls ZLoader

cocaman

Malicious email (T1566.001)
From: ""Holly R. Zell" <corporatenotify@searchpackage.com>" (likely spoofed)
Received: "from searchpackage.com (searchpackage.com [62.4.16.17]) "
Date: "Mon, 25 Jan 2021 16:54:11 +0000"
Subject: "Invoicing info#6812741"
Attachment: "notif-3615.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	21712 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 :

226

Origin country :

n/a

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

notif-3615.xls

Verdict:

No threats detected

Analysis date:

2021-01-25 18:30:10 UTC

Tags:

macros

Link:

https://app.any.run/tasks/32fc44dc-affe-41d2-97dc-17be3dfbafa3

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.Zloader.ComfortablyNumb.20201208.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/f81e9d9b8ff30bd03215a97167b1871b8f494e8846889b80457476c817ea46b5/results/dashboard

Result

Threat name:

Unknown

Detection:

malicious

Classification:

spre.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/589828

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/f81e9d9b8ff30bd03215a97167b1871b8f494e8846889b80457476c817ea46b5/

Threat name:

Script.Trojan.Heuristic

Status:

Malicious

First seen:

2021-01-25 18:29:06 UTC

File Type:

Document

Extracted files:

AV detection:

6 of 46 (13.04%)

Threat level:

2/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=7apj3g4p6mf5amqvvfywpmmhdohustuii2ejxacfor3mqf7ki22q._file

Result

Malware family:

n/a

Score:

10/10

Tags:

macro ransomware xlm

Link:

https://tria.ge/reports/210125-z34n6adwxx/

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

Suspicious use of FindShellTrayWindow

Enumerates physical storage devices

JavaScript code in executable

Malware Config

Dropper Extraction:

https://amethystwinds.com/k.php

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

Threat name:

Kryptik

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/f81e9d9b8ff30bd03215a97167b1871b8f494e8846889b80457476c817ea46b5

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:	INDICATOR_DOC_PhishingPatterns Create hunting rule
Author:	ditekSHen
Description:	Detects OLE, RTF, PDF and OOXML (decompressed) documents with common phishing strings

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:	SUSP_EnableContent_String_Gen Create hunting rule
Author:	Florian Roth
Description:	Detects suspicious string that asks to enable active content in Office Doc
Reference:	Internal Research

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 f81e9d9b8ff30bd03215a97167b1871b8f494e8846889b80457476c817ea46b5

(this sample)

Delivery method

Distributed via e-mail attachment

Dropping

ZLoader

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