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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4f8dd23c570f41dd6905cf959381a860c330c1ae492e49bee1f81a5ecd07874a. 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: 7


Maldoc score: 3


Intelligence 7 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4f8dd23c570f41dd6905cf959381a860c330c1ae492e49bee1f81a5ecd07874a
SHA3-384 hash: 4749930ebbc3a0ef830922ea7b5ae9e50dff802fac30564b25c7f2aa2d6d14a7be18263fb81be83f051f94a6db75142a
SHA1 hash: 45f3c1f42a6bac98d95432d0fc131571ca6c6afe
MD5 hash: ac6f4320902c16f70b54a2d2a3ce0691
humanhash: uranus-vermont-aspen-harry
File name:SecuriteInfo.com.Exploit.Siggen3.8813.27161.18698
Download: download sample
Signature ZLoader
Create hunting rule
File size:31'744 bytes
First seen:2021-01-27 02:08:26 UTC
Last seen:Never
File type:Excel file xlsx
MIME type:application/vnd.ms-excel
ssdeep 768:/TPXk3hbdlylKsgqopeJBWhZFGkE+cL2NdAJAC6kZDj:DXk3hbdlylKsgqopeJBWhZFGkE+cL2NS
TLSH 6DE23FE7F3D5AC45CA584779486783A06712FC216B67878B3348F3292FB27C08A4365B
Reporter SecuriteInfoCom
Tags: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: 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 IDSection sizeSection name
14096 bytesDocumentSummaryInformation
24096 bytesSummaryInformation
321695 bytesWorkbook
OLE vba

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

TypeKeywordDescription
AutoExecAuto_OpenRuns when the Excel Workbook is opened
SuspiciousBase64 StringsBase64-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence

File Origin
# of uploads :
1
# of downloads :
169
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
SecuriteInfo.com.Exploit.Siggen3.8813.27161.18698
Verdict:
No threats detected
Analysis date:
2021-01-27 02:12:20 UTC
Tags:
macros
Link:
https://app.any.run/tasks/68634cdc-9c6a-43c7-86c0-55a832d0cb90

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Legit
File type:
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Has a screenshot:
False
Contains macros:
True
Detection(s):
SecuriteInfo.com.Exploit.Siggen3.8813.27161.18698.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.Zloader.ComfortablyNumb.20201208.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.Zloader.ComfortablyNumb.M3.20201208.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.Excel4.BlackSubmarines.2020.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Result
Verdict:
Malicious
File Type:
Legacy Office File
Link:
https://app.docguard.net/4f8dd23c570f41dd6905cf959381a860c330c1ae492e49bee1f81a5ecd07874a/results/dashboard
Result
Threat name:
Unknown
Detection:
malicious
Classification:
n/a
Score:
56 / 100
Link:
https://www.joesandbox.com/analysis/591430
Signature
Multi AV Scanner detection for submitted file
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Behaviour
Behavior Graph:
Download SVG
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4f8dd23c570f41dd6905cf959381a860c330c1ae492e49bee1f81a5ecd07874a/
Threat name:
Script-Macro.Downloader.ZLoader
Create hunting rule
Status:
Malicious
First seen:
2021-01-26 15:48:14 UTC
AV detection:
11 of 46 (23.91%)
Threat level:
  3/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=j6g5epcxb5a522ifz6kzhanimdbtbqnojexetpxb7anf5tihq5fa._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
macro ransomware xlm
Link:
https://tria.ge/reports/210127-691712qpw2/
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
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/4f8dd23c570f41dd6905cf959381a860c330c1ae492e49bee1f81a5ecd07874a

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.

Comments