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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4883b678b91c2599d474ddb057c17c6b67f6e18c3244ba8dbac44bb21797cc4d. 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: 4


Maldoc score: 3


Intelligence 4 IOCs YARA File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4883b678b91c2599d474ddb057c17c6b67f6e18c3244ba8dbac44bb21797cc4d
SHA3-384 hash: d720a05d3fe5173184ea6d9d7976ee4cc5ac77573f8b6ce3ac6e717a8239ac8356b54514bd410c1d65af2305661aeff8
SHA1 hash: b73ec9b1c60ce6789b460c83116333460fbaa41e
MD5 hash: f0f04d75118e78639f97cd5025279ff3
humanhash: burger-four-rugby-massachusetts
File name:SecuriteInfo.com.Heur.8189.13852
Download: download sample
Signature ZLoader
Create hunting rule
File size:37'376 bytes
First seen:2020-11-25 23:06:14 UTC
Last seen:Never
File type:Excel file xlsx
MIME type:application/vnd.ms-excel
ssdeep 768:SPqNk3hbdlylKsgqopeJBWhZFGkE+cL2NdAJrtYbnHWNDBB+3:Wok3hbdlylKsgqopeJBWhZFGkE+cL2Np
TLSH 64F2A5E7BB85DD66CE48837948AB42906712EC819F6B93877354F3293FB1BE08903547
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
327537 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 :
118
Origin country :
n/a
Vendor Threat Intelligence
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file
Creating a process with a hidden window
DNS request
Sending a custom TCP request
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:
Unknown
Detection:
malicious
Classification:
expl.evad
Score:
92 / 100
Link:
https://www.joesandbox.com/analysis/547482
Signature
Document exploit detected (creates forbidden files)
Document exploit detected (process start blacklist hit)
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/4883b678b91c2599d474ddb057c17c6b67f6e18c3244ba8dbac44bb21797cc4d/
Threat name:
Document-Excel.Trojan.ZLoader
Create hunting rule
Status:
Malicious
First seen:
2020-11-25 20:12:26 UTC
AV detection:
13 of 27 (48.15%)
Threat level:
  5/5
Result
Malware family:
n/a
Score:
  8/10
Tags:
macro
Link:
https://tria.ge/reports/201125-lkelywb8b2/
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
Please note that we are no longer able to provide a coverage score for Virus Total.

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Comments