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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f1e3a7836cb2d505541e09afde30fc1d651ab4402eca3f8f76bd9d3fa646a553. 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: 2


Intelligence 5 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: f1e3a7836cb2d505541e09afde30fc1d651ab4402eca3f8f76bd9d3fa646a553
SHA3-384 hash: 458861a4593e459927c33fd0a2fd6642a66d67c2d2dd74a945ac79d06244fa7ad7dcd0a0801808eae65e21f51e80503e
SHA1 hash: 89cbb4c5efc41cfdae3fc60f5ff9db00d1f6ae59
MD5 hash: b6fa82bbe8c8a2beaf381ee7d4178ecd
humanhash: east-twenty-three-magazine
File name:8271598.xlsb
Download: download sample
Signature ZLoader
Create hunting rule
File size:86'441 bytes
First seen:2020-10-28 06:58:38 UTC
Last seen:Never
File type:Excel file xlsx
MIME type:application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
ssdeep 1536:YDZBQY+rwZ3sKm1FqgGdKp2oE3fD8YAkNHUQGeSGqF6eYOU+1Cs/nOL2:gBP7xZm1gzdKpq8YAkN0HGqF6FK1//OK
TLSH B983F21DD325749DC866307DC3042CD1A90E2CAA9881FD0B34EBB7547AE3BC75B8D2A9
Reporter abuse_ch
Tags:geo JPN xlsb ZLoader


Avatar
abuse_ch
Malspam distributing ZLoader:

HELO: mail-feed1001-04.fc2.com
Sending IP: 199.48.208.76
From: あしあよしのり <info@ctoffaith.com>
Reply-To: あしあよしのり <info@ctoffaith.com>
Subject: 注文番号 AC11599-2140333
Attachment: 8271598.zip (contains "8271598.xlsb")

ZLoader payload URL:
http://foreverbold.xyz/campo/b/b

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: 2
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
SuspiciousHex StringsHex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence

File Origin
# of uploads :
1
# of downloads :
102
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.Trojan.Script.Generic.27919.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file in the %temp% directory
Creating a file
Creating a process with a hidden window
Launching a process by exploiting the app vulnerability
Result
Threat name:
Unknown
Detection:
malicious
Classification:
expl.evad
Score:
80 / 100
Link:
https://www.joesandbox.com/analysis/514363
Signature
Creates HTML files with .exe extension (expired dropper behavior)
Document exploit detected (process start blacklist hit)
Drops PE files to the user root directory
Multi AV Scanner detection for dropped file
Sigma detected: Microsoft Office Product Spawning Windows Shell
Sigma detected: Suspicious Certutil Command
System process connects to network (likely due to code injection or exploit)
Uses certutil -decode
Behaviour
Behavior Graph:
Download SVG
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f1e3a7836cb2d505541e09afde30fc1d651ab4402eca3f8f76bd9d3fa646a553/
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=6hr2pa3mwlkqkva6bgx54mh4dvsrvncaf3fd7d3wxwot7jsguvjq._file
Result
Malware family:
n/a
Score:
  10/10
Tags:
n/a
Link:
https://tria.ge/reports/201028-jcfkye8wq6/
Behaviour
Enumerates system info in registry
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Checks processor information in registry
Modifies system certificate store
Suspicious use of FindShellTrayWindow
Office loads VBA resources, possible macro or embedded object present
Loads dropped DLL
Blacklisted process makes network request
Process spawned unexpected child process
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Trojan
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/f1e3a7836cb2d505541e09afde30fc1d651ab4402eca3f8f76bd9d3fa646a553

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:ach_Dridex_xls_20200528
Create hunting rule
Author:abuse.ch
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

zip 04cf6be810b77fc96e335dd37184c4db68d9bc699d1200009ffe10a600420c60

ZLoader

Excel file xlsx f1e3a7836cb2d505541e09afde30fc1d651ab4402eca3f8f76bd9d3fa646a553

(this sample)

  
Dropped by
MD5 ab4ba09cc5bd690cbd6356ebd14ecfc2
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 04cf6be810b77fc96e335dd37184c4db68d9bc699d1200009ffe10a600420c60

Comments