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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a4dc3c7bca9601bf642e6df0f9baea765a78265fdd20a5bb0aec36ab488dc278. 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: 6


Intelligence 4 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a4dc3c7bca9601bf642e6df0f9baea765a78265fdd20a5bb0aec36ab488dc278
SHA3-384 hash: c1c1cdc77b1bd7171f10deecba23d6797b8481ac30a46b416c9ce40b0aa15b64c570e688cec4755983bb2297544505cd
SHA1 hash: 1baf3c700a4ec774c474d97c10dd656ded2a1040
MD5 hash: 98bf77e681e28286e129381832cf83be
humanhash: texas-arizona-red-alpha
File name:8650.xlsm
Download: download sample
Signature ZLoader
Create hunting rule
File size:17'221 bytes
First seen:2020-11-13 16:10:02 UTC
Last seen:Never
File type:Excel file xlsm
MIME type:application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
ssdeep 192:CfCpGcssKsK0newBa6aFUlbVvevUqzeW/j/3BX26udA+I15620WV2pMXvQ71oq7T:CqpGhs/JmUlM9zTDR26udAFK2FVOZoOT
TLSH 0972BF2EF6201D55C763C83F814111BBFA8D05027A4BA4B17D48B7E63243C6F178BAEA
Reporter ffforward
Tags:xlsm 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: 6
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
SuspiciousFORMULA.FILLMay modify Excel 4 Macro formulas at runtime
SuspiciousHex StringsHex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)
SuspiciousXLM macrosheetXLM macrosheet found. It could contain malicious code

Intelligence

File Origin
# of uploads :
1
# of downloads :
93
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
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
Threat name:
Hidden Macro 4.0
Create hunting rule
Detection:
malicious
Classification:
expl.evad
Score:
88 / 100
Link:
https://www.joesandbox.com/analysis/534478
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/a4dc3c7bca9601bf642e6df0f9baea765a78265fdd20a5bb0aec36ab488dc278/
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=utody66ksya36zbonxyptoxkoznhqjs73uqkloyk5q3kwsenyj4a._file
Result
Malware family:
n/a
Score:
  10/10
Tags:
macro
Link:
https://tria.ge/reports/201113-8esjclx352/
Behaviour
Enumerates system info in registry
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Checks processor information in registry
Modifies registry class
Process spawned unexpected child process
Please note that we are no longer able to provide a coverage score for Virus Total.

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:Microsoft_XLSX_with_Macrosheet
Create hunting rule
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