MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 81d72825d40254ccd9cfd6921fcc8065ef0fc123b9db80300fb1f5eebdd622e5. 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: 8


Maldoc score: 5


Intelligence 8 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 81d72825d40254ccd9cfd6921fcc8065ef0fc123b9db80300fb1f5eebdd622e5
SHA3-384 hash: 1aa2a768c89f9b1635ee17de80a0247543002d1b101a136649eb39ebbc533a4995a6a308b7f4c09bebcd709ed3ed894f
SHA1 hash: 8ae9ddec1f554814553d798fe3ff27c261e8bc46
MD5 hash: a9c3605beb1e8eec8feb5f5b1b096aca
humanhash: beryllium-indigo-spaghetti-arkansas
File name:SecuriteInfo.com.Exploit.Siggen3.1829.16811.20505
Download: download sample
Signature ZLoader
Create hunting rule
File size:36'864 bytes
First seen:2020-12-01 01:49:54 UTC
Last seen:Never
File type:Excel file xlsx
MIME type:application/vnd.ms-excel
ssdeep 768:sPqNk3hbdlylKsgqopeJBWhZFGkE+cL2NdAJbaITeH/Se3sPpc9eNJr/jl:4ok3hbdlylKsgqopeJBWhZFGkE+cL2NC
TLSH 50F293E3BB96ED65CE188375486B42906713EC515B6B938B3384F7293FB1BE08912187
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: 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 IDSection sizeSection name
14096 bytesDocumentSummaryInformation
24096 bytesSummaryInformation
327124 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
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 :
122
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.Exploit.Siggen3.1829.16811.20505.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.ZloaderUnicodeRoadToNoWhere.20200720.UNOFFICIAL
Create hunting rule

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

TwinWave.EvilDoc.ZloaderShineOnYouCrazyDiamondParts1to9.M2.20201116.UNOFFICIAL
Create hunting rule

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
Deleting a recently created file
Possible injection to a system process
Launching a process by exploiting the app vulnerability
Creating a process from a recently created file
Result
Verdict:
Malicious
File Type:
Legacy Office File
Link:
https://app.docguard.net/81d72825d40254ccd9cfd6921fcc8065ef0fc123b9db80300fb1f5eebdd622e5/results/dashboard
Result
Verdict:
MALICIOUS
Details
Excel 4.0 Macro
Document contains Excel 4.0 macros (XLM). A valid, albeit dated feature, this document should be treated with suspicion.
Autostarting Excel Macro Sheet
Excel contains Macrosheet logic that will trigger automatically upon document open.
Result
Threat name:
Unknown
Detection:
malicious
Classification:
expl.evad
Score:
84 / 100
Link:
https://www.joesandbox.com/analysis/551595
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
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/81d72825d40254ccd9cfd6921fcc8065ef0fc123b9db80300fb1f5eebdd622e5/
Threat name:
Document-Excel.Trojan.ZLoader
Create hunting rule
Status:
Malicious
First seen:
2020-11-29 23:38:38 UTC
AV detection:
15 of 29 (51.72%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=qhlsqjouajkmzwop22jb7teamxxq7qjdxhnyamapwh265powelsq._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
macro
Link:
https://tria.ge/reports/201201-sc32npgpda/
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
JavaScript code in executable
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/81d72825d40254ccd9cfd6921fcc8065ef0fc123b9db80300fb1f5eebdd622e5

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.

Web download

ZLoader

Excel file xlsx 81d72825d40254ccd9cfd6921fcc8065ef0fc123b9db80300fb1f5eebdd622e5

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/871119/
  
Delivery method
Distributed via web download

Comments