MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 47e220844a72c2582edc5c8496b3fca49729cf8d30e86f535db795270e7f364a. 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


BlackNET


Vendor detections: 9


Maldoc score: 6


Intelligence 9 IOCs YARA 15 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 47e220844a72c2582edc5c8496b3fca49729cf8d30e86f535db795270e7f364a
SHA3-384 hash: 9784a90351217f956f24a63d9388d20a513b0767827ffae119a88f3330dbe4305307b60eab8c5e76f08ce939c56b7d44
SHA1 hash: a7086a134b92b414e97a3c3ea23237b563af8737
MD5 hash: f0f9db883404ca28dec9a0f2212a01d7
humanhash: oklahoma-grey-blue-golf
File name:PO2567.xlsm
Download: download sample
Signature BlackNET
Create hunting rule
File size:46'722 bytes
First seen:2021-02-01 17:07:33 UTC
Last seen:2021-02-01 18:58:05 UTC
File type:Excel file xlsm
MIME type:application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
ssdeep 768:YNaR0MkuTOsfbH2UbG6wzOAgRVlwu3x/Xjvy5JxYDX/jpapB+EQLGs8W:zRnTLH0K93xAaDX1apBOLGC
TLSH 1923F1026E04125AC56BC33C8A68EDE5D05E0980DF2B3F939D11EA547ED9E640B1EFDB
Reporter abuse_ch
Tags:BlackNet xlsm


Avatar
abuse_ch
Malspam distributing BlackNET:

HELO: rdns0.private-online-ehnational.com
Sending IP: 139.28.36.119
From: wetransfer <wetransfer@private-online-ehnational.com>
Subject: New file attachment
Attachment: PO2567.xlsm

BlackNET payload URL:
http://stpatricksresidences.cos.sg/Client.exe

BlackNet C2:
http://cuxtonmarina.co.uk/panel//receive.php

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 dump

MalwareBazaar was able to identify 7 sections in this file using oledump:

Section IDSection sizeSection name
A1494 bytesPROJECT
A286 bytesPROJECTwm
A3965 bytesVBA/ThisWorkbook
A47 bytesVBA/_VBA_PROJECT
A5238 bytesVBA/dir
A6178 bytesVBA/giejavskcnjjfq
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
SuspiciousCreateMay execute file or a system command through WMI
SuspiciousCreateObjectMay create an OLE object
SuspiciousHex StringsHex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence

File Origin
# of uploads :
2
# of downloads :
147
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
a7086a134b92b414e97a3c3ea23237b563af8737.xlsm
Verdict:
No threats detected
Analysis date:
2021-02-01 14:44:13 UTC
Tags:
macros
Link:
https://app.any.run/tasks/9e528c42-405c-429b-932c-8641fcb7d7cd

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
File type:
application/vnd.ms-excel.sheet.macroEnabled.12
Has a screenshot:
False
Contains macros:
True
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Result
Verdict:
Malicious
File Type:
Excel File with Macro
Link:
https://app.docguard.net/47e220844a72c2582edc5c8496b3fca49729cf8d30e86f535db795270e7f364a/results/dashboard
Document image
Image:
Download PNG
Document image
Result
Verdict:
MALICIOUS
Details
Macro with Startup Hook
Detected macro logic that will automatically execute on document open. Most malware contains some execution hook.
Macro Execution Coercion
Detected a document that appears to social engineer the user into activating embedded logic.
Macro Contains Suspicious String
Detected a macro with a suspicious string. Suspicious strings include privileged function calls, obfuscations, odd registry keys, etc...
Powershell
Possibly Powershell fragment found embedded.
Document With Minimal Content
Document contains less than 1 kilobyte of semantic information.
Result
Threat name:
Unknown
Detection:
malicious
Classification:
n/a
Score:
48 / 100
Link:
https://www.joesandbox.com/analysis/595614
Signature
Multi AV Scanner detection for submitted file
Behaviour
Behavior Graph:
Download SVG
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/47e220844a72c2582edc5c8496b3fca49729cf8d30e86f535db795270e7f364a/
Threat name:
Script-Macro.Trojan.Corona
Create hunting rule
Status:
Malicious
First seen:
2021-02-01 17:08:07 UTC
AV detection:
10 of 28 (35.71%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=i7rcbbckolbfqlw4lscjnm74uslstt4ngdug6u25w6ksodt7gzfa._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
macro
Link:
https://tria.ge/reports/210201-d6vd2h92mn/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious use of SetWindowsHookEx
Office loads VBA resources, possible macro or embedded object present
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Dropper
Score:
0.80
Link:
https://yomi.yoroi.company/submissions/47e220844a72c2582edc5c8496b3fca49729cf8d30e86f535db795270e7f364a

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:Blacknet
Create hunting rule
Description:BlackNet Payload
Rule name:CN_disclosed_20180208_c
Create hunting rule
Author:Florian Roth
Description:Detects malware from disclosed CN malware set
Reference:https://twitter.com/cyberintproject/status/961714165550342146
Rule name:Cryptocoin_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Steam in files like avemaria
Rule name:Email_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Email in files like avemaria
Rule name:INDICATOR_SUSPICIOUS_DisableWinDefender
Create hunting rule
Author:ditekSHen
Description:Detects executables containing artifcats associated with disabling Widnows Defender
Rule name:IPPort_combo_mem
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
Rule name:Keylog_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Contains Keylog
Rule name:MALWARE_Win_BlackNET
Create hunting rule
Author:ditekSHen
Description:Detects BlackNET RAT
Rule name:MAL_Winnti_Sample_May18_1
Create hunting rule
Author:Florian Roth
Description:Detects malware sample from Burning Umbrella report - Generic Winnti Rule
Reference:https://401trg.pw/burning-umbrella/
Rule name:Ping_Del_method_bin_mem
Create hunting rule
Author:James_inthe_box
Description:cmd ping IP nul del
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:Stealer_word_in_memory
Create hunting rule
Author:James_inthe_box
Description:The actual word stealer in memory
Rule name:SUSP_Modified_SystemExeFileName_in_File
Create hunting rule
Author:Florian Roth
Description:Detecst a variant of a system file name often used by attackers to cloak their activity
Reference:https://www.symantec.com/blogs/threat-intelligence/seedworm-espionage-group
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

BlackNET

Excel file xlsm 47e220844a72c2582edc5c8496b3fca49729cf8d30e86f535db795270e7f364a

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/986797/
  
Delivery method
Distributed via e-mail attachment

Comments