🤲🏼 NEW | abuse.ch Community Hub! Earn recognition 🏅 for the malware intelligence you share, climb the leaderboards 📈, and connect with like-minded contributors who share your hunting focus 🤝. Ready to unlock your profile? Go to the Community Hub →

MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 28e37053ad15ea80cc1ea5a4ccf248fbddd2bcb0d9eed572bd939ffae6a90483. 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: 28e37053ad15ea80cc1ea5a4ccf248fbddd2bcb0d9eed572bd939ffae6a90483
SHA3-384 hash: 9e34b876f835f8c57ae2b821235a8094bfb2c8d0004cdc30d7a1d115474dfe11c3671db0ca2f94e598a905c4cebfe7cf
SHA1 hash: 431f14d759222ed8b112ef6fa3a0babf17d0566c
MD5 hash: 739b6d81da07b988ab835fd22405a7d4
humanhash: edward-hot-moon-march
File name:St_7469.xls
Download: download sample
Signature ZLoader
Create hunting rule
File size:46'592 bytes
First seen:2020-10-30 14:47:04 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 768:vrgNk3hbdlylKsgqopeJBWhZFGkE+cL2NdAJoLIqthyEU2S67y8xfbG+:D+k3hbdlylKsgqopeJBWhZFGkE+cL2Nz
TLSH E42362E3AB96ED74CA988375485B47606312EC41566F838B3285F6353FB5AF09E022C7
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 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 :
1
# of downloads :
92
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
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:
expl.evad
Score:
88 / 100
Link:
https://www.joesandbox.com/analysis/517088
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
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/28e37053ad15ea80cc1ea5a4ccf248fbddd2bcb0d9eed572bd939ffae6a90483/
Threat name:
Document-Excel.Trojan.ZLoader
Create hunting rule
Status:
Malicious
First seen:
2020-10-30 14:50:06 UTC
File Type:
Document
Extracted files:
8
AV detection:
16 of 29 (55.17%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=fdrxau5ncxvibta6uwsmz4si7po5fpfq3hxnk4v5sop7vzvjasbq._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
n/a
Link:
https://tria.ge/reports/201030-4wtkf6vaf2/
Behaviour
Enumerates system info in registry
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious use of SetWindowsHookEx
Checks processor information in registry
Suspicious use of FindShellTrayWindow
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.71
Link:
https://yomi.yoroi.company/submissions/28e37053ad15ea80cc1ea5a4ccf248fbddd2bcb0d9eed572bd939ffae6a90483

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.

  
Delivery method
Distributed via e-mail link

Comments