MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 42af9724562b3bd690ae30dbc6c1b99abb39e50adbb41f777feb9bceb3f3c102. 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 8 File information Comments

SHA256 hash:	42af9724562b3bd690ae30dbc6c1b99abb39e50adbb41f777feb9bceb3f3c102
SHA3-384 hash:	7fc18e7bbd98dbce4934a0da5a4ee6262410bf87d3faaafb610529dc76db566021a7172aca18e50c8281b0534e3d4710
SHA1 hash:	250cc23c92659fa8c257168dd6d00c34e62ed658
MD5 hash:	ccfa95ae24dd8cf846f589132976dc18
humanhash:	solar-washington-jig-fanta
File name:	doc_7252.xls
Download:	download sample
Signature	ZLoader Create hunting rule
File size:	45'568 bytes
First seen:	2020-11-07 09:45:23 UTC
Last seen:	Never
File type:	xls
MIME type:	application/vnd.ms-excel
ssdeep	768:ePXk3hbdlylKsgqopeJBWhZFGkE+cL2NdAJ919ZJe95a2zugC8Pj1dL:iXk3hbdlylKsgqopeJBWhZFGkE+cL2Nd
TLSH	CB2393E7AAA7DE75DA588335489B42506312DC814B6A53CB3395F73A3FB0BF04E12187
Reporter	abuse_ch
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	0 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 :

109

Origin country :

n/a

Vendor Threat Intelligence

Detection(s):

TwinWave.EvilDoc.ZloadersAreStrange.20201105.UNOFFICIAL

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:

spre.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/523710

Signature

Antivirus detection for URL or domain

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)

Yara detected VBS Downloader Generic

Behaviour

Behavior Graph:

Download SVG

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/42af9724562b3bd690ae30dbc6c1b99abb39e50adbb41f777feb9bceb3f3c102/

Threat name:

Document-Word.Trojan.ZLoader

Status:

Malicious

First seen:

2020-11-06 16:51:15 UTC

AV detection:

15 of 29 (51.72%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=ikxzojcwfm55nefogdn4nqnztk5ttzik3o2b65375on45m7tyeba._file

Result

Malware family:

n/a

Score:

10/10

Tags:

n/a

Link:

https://tria.ge/reports/201107-ekx5va8h8x/

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

Suspicious use of FindShellTrayWindow

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:	APT32_KerrDown Create hunting rule

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

Rule name:	Embedded_PE Create hunting rule

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

Rule name:	Microsoft_Office_Document_with_Embedded_Flash_File Create hunting rule

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 42af9724562b3bd690ae30dbc6c1b99abb39e50adbb41f777feb9bceb3f3c102

(this sample)

Delivery method

Distributed via e-mail attachment

Comments

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