MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 75b52b94778899c3d6fd0d3357fc04a604d765a89dcf045707df63023bf6b9a2. 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: 5

Maldoc score: 5

Intelligence 5 IOCs YARA 5 File information Comments

SHA256 hash:	75b52b94778899c3d6fd0d3357fc04a604d765a89dcf045707df63023bf6b9a2
SHA3-384 hash:	2c5c6eb1eda390b78810a2d5d687a3b393e958be6a8083909643a73aff641eab864494c0351780c512d064ec8aac2b43
SHA1 hash:	ebc5ffea3d0ecc2a7031f04403df316947b8cbd3
MD5 hash:	6666ddc3e1e44258414a0825cb33960a
humanhash:	ten-burger-carbon-kansas
File name:	St-4852.xls
Download:	download sample
Signature	ZLoader Create hunting rule
File size:	45'568 bytes
First seen:	2020-11-05 13:43:36 UTC
Last seen:	2020-11-05 16:10:54 UTC
File type:	xls
MIME type:	application/vnd.ms-excel
ssdeep	768:CPXk3hbdlylKsgqopeJBWhZFGkE+cL2NdAJuauTP3j4gCstzmMzsQWNJzW+4YPJP:mXk3hbdlylKsgqopeJBWhZFGkE+cL2NI
TLSH	E223A6E3EB95DDB6CA048379486B41905322EC50577B83CB3749F6253FB1BB0AE12687
Reporter	ffforward
Tags:	xls ZLoader

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: 5

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	6 bytes	DocumentSummaryInformation
2	6 bytes	SummaryInformation
3	5 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	Hex Strings	Hex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)
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 :

114

Origin country :

n/a

Vendor Threat Intelligence

Detection(s):

TwinWave.EvilDoc.ZloaderUnicodeRoadToNoWhere.20200720.UNOFFICIAL

TwinWave.EvilDoc.ZloaderUnicodeRoadToNoWherePartDuex.20200730.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Creating a file

Creating a process with a hidden window

Deleting a recently created file

Replacing files

Launching a process

Possible injection to a system process

Launching a process by exploiting the app vulnerability

Creating a process from a recently created file

Result

Threat name:

Hidden Macro 4.0

Detection:

malicious

Classification:

expl.evad

Score:

96 / 100

Link:

https://www.joesandbox.com/analysis/521503

Signature

Document exploit detected (creates forbidden files)

Document exploit detected (process start blacklist hit)

Found Excel 4.0 Macro with suspicious formulas

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)

Behaviour

Behavior Graph:

Download SVG

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/75b52b94778899c3d6fd0d3357fc04a604d765a89dcf045707df63023bf6b9a2/

Threat name:

Document-Excel.Trojan.ZLoader

Status:

Malicious

First seen:

2020-11-05 13:45:05 UTC

File Type:

Document

Extracted files:

AV detection:

15 of 29 (51.72%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=ow2sxfdxrcm4hvx5buzvp7aeuycnoznitxhqivyh35rqeo7wxgra._file

Result

Malware family:

n/a

Score:

10/10

Tags:

n/a

Link:

https://tria.ge/reports/201105-czqny6jyzx/

Behaviour

Enumerates system info in registry

Modifies Internet Explorer settings

Suspicious behavior: AddClipboardFormatListener

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Checks processor information in registry

Modifies registry class

Process spawned unexpected child process

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

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 75b52b94778899c3d6fd0d3357fc04a604d765a89dcf045707df63023bf6b9a2

(this sample)

Delivery method

Distributed via e-mail attachment

Comments

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