MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f81cc43601d9335fe129c4d7841f8ddca72103f7651bbec2df0fe81b5e083dad. 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: 9

Maldoc score: 4

Intelligence 9 IOCs YARA 8 File information Comments

SHA256 hash:	f81cc43601d9335fe129c4d7841f8ddca72103f7651bbec2df0fe81b5e083dad
SHA3-384 hash:	641288296bf2a1b2078d54176744e5a864fb185c43320dacda3bd2b3dca317de923a9bd14d5c81ab7b1e645d3e7eea1f
SHA1 hash:	54b61d4869e9e07f30edc4d9e795e8122ab47529
MD5 hash:	a38facfdfc65e720661d69919b48b0fd
humanhash:	ohio-bakerloo-kentucky-uncle
File name:	399586.xls
Download:	download sample
Signature	ZLoader Create hunting rule
File size:	312'320 bytes
First seen:	2021-05-24 06:04:49 UTC
Last seen:	2021-05-25 07:50:31 UTC
File type:	xls
MIME type:	application/vnd.ms-excel
ssdeep	6144:tk3hbdlylKsgqopeJBWhZFVE+W2NdAZSUEJdY5N+IDhTsd6vf0GLEc:4UoEH9TELG
TLSH	B864C5CAAFA3CDB9CB10E5708CEE02446324EC05496D87C73649E6357FEAD34AD562D8
Reporter	cocaman
Tags:	INVOICE xls ZLoader

cocaman

Malicious email (T1566.001)
From: "Services Corp. <quickbooks@notification.intuit.com>" (likely spoofed)
Received: "from [65.68.190.190] (unknown [65.68.190.190]) "
Date: "Mon, 17 May 2021 23:49:42 -0600"
Subject: "Reminder: Invoice 642106"
Attachment: "642106.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: 4

Application name is Microsoft Excel

Office document is in OLE format

Office document contains VBA Macros

OLE dump

MalwareBazaar was able to identify 15 sections in this file using oledump:

Section ID	Section size	Section name
1	108 bytes	CompObj
2	300 bytes	DocumentSummaryInformation
3	200 bytes	SummaryInformation
4	286283 bytes	Workbook
5	481 bytes	_VBA_PROJECT_CUR/PROJECT
6	83 bytes	_VBA_PROJECT_CUR/PROJECTwm
7	3047 bytes	_VBA_PROJECT_CUR/VBA/Sheet1
8	1127 bytes	_VBA_PROJECT_CUR/VBA/Sheet2
9	4130 bytes	_VBA_PROJECT_CUR/VBA/ThisWorkbook
10	3321 bytes	_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
11	1828 bytes	_VBA_PROJECT_CUR/VBA/__SRP_0
12	311 bytes	_VBA_PROJECT_CUR/VBA/__SRP_1
13	1739 bytes	_VBA_PROJECT_CUR/VBA/__SRP_2
14	614 bytes	_VBA_PROJECT_CUR/VBA/__SRP_3
15	539 bytes	_VBA_PROJECT_CUR/VBA/dir

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
Suspicious	Run	May run an executable file or a system command
Suspicious	Hex Strings	Hex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence

File Origin

# of uploads :

# of downloads :

169

Origin country :

n/a

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

443366.xls

Verdict:

No threats detected

Analysis date:

2021-05-18 17:46:14 UTC

Tags:

macros macros40

Link:

https://app.any.run/tasks/276b3f55-2f1d-46eb-b32c-fde4a27a4a44

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:

n/a

Link:

https://www.capesandbox.com/analysis/161239/

Detection(s):

TwinWave.EvilDoc.DridexTakeMyBreathAway.20210517.UNOFFICIAL

Sanesecurity.Rogue.0hr.20210518-0749.MacroImg.UNOFFICIAL

Sanesecurity.Badmacro.XlsM.Hide.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Result

Verdict:

Malicious

File Type:

Legacy Excel File with Macro

Link:

https://app.docguard.net/f81cc43601d9335fe129c4d7841f8ddca72103f7651bbec2df0fe81b5e083dad/results/dashboard

Document image

Image:

Download PNG

Result

Threat name:

Unknown

Detection:

malicious

Classification:

expl

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/790041

Signature

Document contains an embedded VBA macro which may execute processes

Document exploit detected (creates forbidden files)

Document exploit detected (drops PE files)

Document exploit detected (process start blacklist hit)

Document exploit detected (UrlDownloadToFile)

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Office process drops PE file

Sigma detected: BlueMashroom DLL Load

Sigma detected: Microsoft Office Product Spawning Windows Shell

Sigma detected: Regsvr32 Anomaly

Behaviour

Behavior Graph:

Download SVG

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/f81cc43601d9335fe129c4d7841f8ddca72103f7651bbec2df0fe81b5e083dad/

Threat name:

Document-Word.Infostealer.Dridex

Status:

Malicious

First seen:

2021-05-17 15:37:04 UTC

File Type:

Document

Extracted files:

AV detection:

18 of 46 (39.13%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=7aominqb3ezv7yjjytlyih4n3stsca7xmun35qw7b7ubwxqihwwq._file

Result

Malware family:

n/a

Score:

8/10

Tags:

macro

Link:

https://tria.ge/reports/210524-2jpz69mzwj/

Behaviour

Checks processor information in registry

Enumerates system info in registry

Modifies Internet Explorer settings

Suspicious behavior: AddClipboardFormatListener

Suspicious use of SetWindowsHookEx

Office loads VBA resources, possible macro or embedded object present

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/f81cc43601d9335fe129c4d7841f8ddca72103f7651bbec2df0fe81b5e083dad

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:	ach_ZLoader_xls_20201029 Create hunting rule
Author:	abuse.ch
Description:	Detects ZLoader XLS

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

Rule name:	Excel_Hidden_Macro_Sheet Create hunting rule

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

Rule name:	ZloaderXLSBehavior Create hunting rule

File information

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

Malspam

ZLoader

xls f81cc43601d9335fe129c4d7841f8ddca72103f7651bbec2df0fe81b5e083dad

(this sample)

Delivery method

Distributed via e-mail attachment

Dropping

ZLoader

Cape

https://www.capesandbox.com/analysis/161239/

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