MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 624c1ffb5d398d36648c6ccb8fc62d7e9ddc994c5bfaf530b7344978fe86b9eb. 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: 5


Maldoc score: 3


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

SHA256 hash: 624c1ffb5d398d36648c6ccb8fc62d7e9ddc994c5bfaf530b7344978fe86b9eb
SHA3-384 hash: b06b2b128a8326136d60d8e011d6170a47c1b113f37d84eb87a946285c42bf8b2fd74bfcd68296c347441dc115226ee4
SHA1 hash: 9759332bcb130f4b343ed743f7e82379f51bc6ef
MD5 hash: b0030bf6fb3c43758d0b25ba12920e0f
humanhash: beryllium-golf-virginia-neptune
File name:case.1141.xls
Download: download sample
Signature ZLoader
Create hunting rule
File size:37'376 bytes
First seen:2020-11-25 17:21:24 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 768:TPqNk3hbdlylKsgqopeJBWhZFGkE+cL2NdAJ9NSxMPi0w2xPQ:Lok3hbdlylKsgqopeJBWhZFGkE+cL2Nd
TLSH 42F273E7BAD6EC65CE084375486B42A0A713EC925767938B7345F7293FB1BE04D0224B
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: 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
327413 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 :
81
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
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
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.
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/624c1ffb5d398d36648c6ccb8fc62d7e9ddc994c5bfaf530b7344978fe86b9eb/
Threat name:
Document-Word.Trojan.ZLoader
Create hunting rule
Status:
Malicious
First seen:
2020-11-25 17:23:47 UTC
AV detection:
16 of 28 (57.14%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=mjgb7625hggtmzemntfy7rrnp2o5zgkmlp5pkmfxgrexr7ugxhvq._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
macro
Link:
https://tria.ge/reports/201125-8gj46knxbj/
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
Suspicious use of FindShellTrayWindow
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: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 624c1ffb5d398d36648c6ccb8fc62d7e9ddc994c5bfaf530b7344978fe86b9eb

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments