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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fa967d25a1edfc762e45199840ff300d1f3ad4dc72bbea6672d90a577bd4de0d. 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: 6


Maldoc score: 5


Intelligence 6 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: fa967d25a1edfc762e45199840ff300d1f3ad4dc72bbea6672d90a577bd4de0d
SHA3-384 hash: 7f4eb8f63b75cf102a405a86fe2044e6467a243b53d285d981a978823b8840140b2c9fb7b9f46c1e375e1da6fe119515
SHA1 hash: 76c87634b9474e7d1a1c3def186b0d5226211063
MD5 hash: f1feb8d03872d302151feadb367272a6
humanhash: west-item-item-mike
File name:doc_2747.xls
Download: download sample
Signature ZLoader
Create hunting rule
File size:55'808 bytes
First seen:2020-10-30 21:05:04 UTC
Last seen:2020-10-30 22:42:46 UTC
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 1536:Quk3hbdlylKsgqopeJBWhZFGkE+cL2NdA8vtQAkGAp:Quk3hbdlylKsgqopeJBWhZFGkE+cL2Ns
TLSH 724351E3E7929D79CAD583354B5B42E06302FC81266A438772C5F6353FBDAB04E0E586
Reporter Aura
Tags:macros 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 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
SuspiciousHex StringsHex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)
SuspiciousBase64 StringsBase64-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence

File Origin
# of uploads :
2
# of downloads :
151
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
TwinWave.EvilDoc.ZloaderUnicodeRoadToNoWhere.20200720.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.ZloaderUnicodeRoadToNoWherePartDuex.20200730.UNOFFICIAL
Create hunting rule

TwinwWave.EvilDoc.ZloaderBackToBasom.20201026.UNOFFICIAL
Create hunting rule

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
Create hunting rule
Detection:
malicious
Classification:
spre.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/517352
Signature
Document exploit detected (creates forbidden files)
Document exploit detected (process start blacklist hit)
Found abnormal large hidden Excel 4.0 Macro sheet
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
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
Yara detected VBS Launcher Generic
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 307780 Sample: doc_2747.xls Startdate: 30/10/2020 Architecture: WINDOWS Score: 100 39 Multi AV Scanner detection for submitted file 2->39 41 Yara detected VBS Launcher Generic 2->41 43 Yara detected VBS Downloader Generic 2->43 45 4 other signatures 2->45 6 EXCEL.EXE 60 29 2->6         started        10 explorer.exe 2->10         started        12 explorer.exe 2 2->12         started        14 explorer.exe 2->14         started        process3 file4 31 C:\Users\Public\yJt.vbs, ASCII 6->31 dropped 33 C:\Users\Public\JfPPt1GD.vbs, ASCII 6->33 dropped 47 Document exploit detected (creates forbidden files) 6->47 49 Injects code into the Windows Explorer (explorer.exe) 6->49 51 Document exploit detected (process start blacklist hit) 6->51 53 Microsoft Office drops suspicious files 6->53 16 explorer.exe 1 6->16         started        18 explorer.exe 1 6->18         started        20 explorer.exe 1 6->20         started        22 wscript.exe 4 1 10->22         started        27 wscript.exe 1 12->27         started        29 wscript.exe 14->29         started        signatures5 process6 dnsIp7 37 freelancer.yoga 104.28.20.225, 443, 49165 CLOUDFLARENETUS United States 22->37 35 C:\Users\Public\VhHzFFmk.html, HTML 22->35 dropped 55 System process connects to network (likely due to code injection or exploit) 22->55 file8 signatures9
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/fa967d25a1edfc762e45199840ff300d1f3ad4dc72bbea6672d90a577bd4de0d/
Threat name:
Script.Trojan.Heuristic
Create hunting rule
Status:
Malicious
First seen:
2020-10-28 15:01:41 UTC
AV detection:
6 of 48 (12.50%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7klh2jnb5x6hmlsfdgmeb7zqbuptvvg4ok56uzts3effo66u3ygq._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
n/a
Link:
https://tria.ge/reports/201030-hm3wv7hgks/
Behaviour
Enumerates system info in registry
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious use of SetWindowsHookEx
Checks processor information in registry
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/fa967d25a1edfc762e45199840ff300d1f3ad4dc72bbea6672d90a577bd4de0d

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

Excel file xls fa967d25a1edfc762e45199840ff300d1f3ad4dc72bbea6672d90a577bd4de0d

(this sample)

Cape
Cape
https://capesandbox.com/analysis/81352/
  
Delivery method
Distributed via e-mail attachment

Comments