MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 e7df88b691f820535f249821d16054a01f33e0acf3ae12d0b64f98cced910012. 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


NetWire


Vendor detections: 14


Maldoc score: 9


Intelligence 14 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: e7df88b691f820535f249821d16054a01f33e0acf3ae12d0b64f98cced910012
SHA3-384 hash: 852a111d321c74a3797417138277b3a810c7579eb8d53608642e4d912929f55e027331d6640b47a9c0d20068b2fd5285
SHA1 hash: e6f1f8bbc40a59911543be499e1e07b54d55c3f4
MD5 hash: 241d9fbb42762beb00492d32d5e9d291
humanhash: burger-may-zulu-seventeen
File name:Tax Invoice.xlsm
Download: download sample
Signature NetWire
Create hunting rule
File size:43'401 bytes
First seen:2022-11-17 07:14:52 UTC
Last seen:2022-11-18 07:26:09 UTC
File type:Excel file xlsm
MIME type:application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
ssdeep 768:IvjsCvCssn3uBIJYfTH+niSpKvDH7Nv+nWhFFiKk/f7qtNhTxRB+nE2g7/:IvDvCT3uG1ByT7Nv+qFFi3/jqLxxyE2g
TLSH T14013E12CCFDA4E58FA5B8076581FB9918549DA9192419F4B0FA8F20F1564CC1132BEEF
TrID 42.2% (.XLAM) Excel Macro-enabled Open XML add-in (83500/1/13)
29.1% (.XLSM) Excel Microsoft Office Open XML Format document (with Macro) (57500/1/12)
17.2% (.XLSX) Excel Microsoft Office Open XML Format document (34000/1/7)
8.8% (.ZIP) Open Packaging Conventions container (17500/1/4)
2.0% (.ZIP) ZIP compressed archive (4000/1)
Reporter cocaman
Tags:INVOICE NetWire xlsm


Avatar
cocaman
Malicious email (T1566.001)
From: "Jason Bourne <admin@barmails.monster>" (likely spoofed)
Received: "from mail.barmails.monster (unknown [103.169.34.107]) "
Date: "Thu, 17 Nov 2022 15:51:09 +0200"
Subject: "Tax Invoice"
Attachment: "Tax Invoice.xlsm"

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: 9
OLE dump

MalwareBazaar was able to identify 9 sections in this file using oledump:

Section IDSection sizeSection name
A1586 bytesPROJECT
A2119 bytesPROJECTwm
A3173 bytesVBA/Learn more
A4168 bytesVBA/Start
A5337 bytesVBA/ThisWorkbook
A6171 bytesVBA/Workbook
A77 bytesVBA/_VBA_PROJECT
A8270 bytesVBA/dir
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
AutoExecWorkbook_OpenRuns when the Excel Workbook is opened
IOC192.3.194.246IPv4 address
IOCcertutil.exeExecutable file name
IOCecs.exeExecutable file name
IOCNiipxzvceptnltqinb.eExecutable file name
SuspiciousShellMay run an executable file or a system command
SuspiciousvbHideMay run an executable file or a system command
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 :
2
# of downloads :
324
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
netwire
Create hunting rule
ID:
1
File name:
Tax Invoice.xlsm
Verdict:
Malicious activity
Analysis date:
2022-11-17 07:19:24 UTC
Tags:
macros macros-on-open loader trojan netwire rat
Link:
https://app.any.run/tasks/2e18a5ca-0515-401a-b6d3-efb6147bac3d

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/335209/
Detection(s):
TwinWave.EvilDoc.PublicDottedQuadDLrRunLikeHell.20210223.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.CertUtilFadeAway.20220102.UNOFFICIAL
Create hunting rule

Xls.Dropper.EPPlus-9802867-2
Create hunting rule

TwinWave.EvilDoc.OkayLureDefenderXL.20220418.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a custom TCP request
Searching for the window
Creating a window
Сreating synchronization primitives
Creating a process with a hidden window
Launching a process
Creating a file
Creating a process from a recently created file
Running batch commands
Unauthorized injection to a recently created process
Running batch commands by exploiting the app vulnerability
Sending an HTTP GET request to an infection source
Result
Verdict:
Malicious
File Type:
Excel File with Macro
Link:
https://app.docguard.net/e7df88b691f820535f249821d16054a01f33e0acf3ae12d0b64f98cced910012/results/dashboard
Payload URLs
URL
File name
http://192.3.194.246/ecs.exe
ThisWorkbook
Behaviour
BlacklistAPI detected
Document image
Image:
Download PNG
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
certutil certutil.exe cmd macros macros-on-open
Link:
https://www.filescan.io/uploads/6375df784dc24c6f80b84711/reports/69e65e36-4d53-43ef-aa57-093a19d45862/overview
Label:
Malicious
Suspicious Score:
9.6/10
Score Malicious:
97%
Score Benign:
3%
Link:
https://www.malware.ai/gui/files/?id=75686b92-052b-49b9-82fc-db5a7d95b3ab
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/e7df88b691f820535f249821d16054a01f33e0acf3ae12d0b64f98cced910012
Details
Macro with Startup Hook
Detected macro logic that will automatically execute on document open. Most malware contains some execution hook.
IPv4 Dotted Quad URL
A URL was detected referencing a direct IP address, as opposed to a domain name.
Macro Contains Suspicious String
Detected a macro with a suspicious string. Suspicious strings include privileged function calls, obfuscations, odd registry keys, etc...
InQuest Machine Learning
An InQuest machine-learning model classified this macro as potentially malicious.
External Relationship Element
Document contains an externally hosted relationship, which fetches further content.
Result
Threat name:
NetWire
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1115547
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Creates an undocumented autostart registry key
Document contains an embedded VBA macro which may execute processes
Document exploit detected (process start blacklist hit)
Drops PE files to the document folder of the user
Encrypted powershell cmdline option found
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: NetWire
Snort IDS alert for network traffic
System process connects to network (likely due to code injection or exploit)
Uses ping.exe to check the status of other devices and networks
Yara detected NetWire RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 748244 Sample: Tax Invoice.xlsm Startdate: 17/11/2022 Architecture: WINDOWS Score: 100 46 Snort IDS alert for network traffic 2->46 48 Multi AV Scanner detection for domain / URL 2->48 50 Malicious sample detected (through community Yara rule) 2->50 52 12 other signatures 2->52 9 EXCEL.EXE 54 22 2->9         started        process3 file4 32 C:\Users\user\Desktop\~$Tax Invoice.xlsm, data 9->32 dropped 12 cmd.exe 9->12         started        process5 process6 14 Niipxzvceptnltqinb.exe.exe 13 8 12->14         started        18 certutil.exe 13 12->18         started        dnsIp7 34 C:\Users\user\AppData\Roaming\...\tes.exe, PE32 14->34 dropped 56 Multi AV Scanner detection for dropped file 14->56 58 Creates an undocumented autostart registry key 14->58 60 Machine Learning detection for dropped file 14->60 66 2 other signatures 14->66 21 cmd.exe 14->21         started        24 Niipxzvceptnltqinb.exe.exe 2 14->24         started        27 powershell.exe 6 14->27         started        40 192.3.194.246, 49173, 49174, 49175 AS-COLOCROSSINGUS United States 18->40 36 C:\Users\user\...36iipxzvceptnltqinb.exe.exe, PE32 18->36 dropped 38 C:\Users\...\8FB86F2E87E154B3C50BFB159153A6BE, PE32 18->38 dropped 62 System process connects to network (likely due to code injection or exploit) 18->62 64 Drops PE files to the document folder of the user 18->64 file8 signatures9 process10 dnsIp11 54 Uses ping.exe to check the status of other devices and networks 21->54 29 PING.EXE 21->29         started        42 212.193.30.230, 3345, 49176 SPD-NETTR Russian Federation 24->42 signatures12 process13 dnsIp14 44 google.com 142.250.186.110 GOOGLEUS United States 29->44
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/e7df88b691f820535f249821d16054a01f33e0acf3ae12d0b64f98cced910012/
Threat name:
Script-Macro.Downloader.EncDoc
Create hunting rule
Status:
Malicious
First seen:
2022-11-17 02:57:11 UTC
File Type:
Document
Extracted files:
50
AV detection:
12 of 25 (48.00%)
Threat level:
  3/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=47pyrnur7aqfgxzetaq5cycuuapthyfm6oxbfufwj6mmz3mraaja._file
Result
Malware family:
netwire
Create hunting rule
Score:
  10/10
Tags:
family:netwire botnet rat stealer
Link:
https://tria.ge/reports/221117-h28wxshh6s/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies registry class
Runs ping.exe
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Enumerates physical storage devices
Suspicious use of SetThreadContext
Checks computer location settings
Loads dropped DLL
Downloads MZ/PE file
Executes dropped EXE
NetWire RAT payload
Netwire
Process spawned unexpected child process
Malware Config
C2 Extraction:
212.193.30.230:3345
Malware family:
Netwire
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/e7df88b691f8/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/e7df88b691f820535f249821d16054a01f33e0acf3ae12d0b64f98cced910012

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:BitcoinAddress
Create hunting rule
Author:Didier Stevens (@DidierStevens)
Description:Contains a valid Bitcoin address
Rule name:informational_win_ole_protected
Create hunting rule
Author:Jeff White (karttoon@gmail.com) @noottrak
Description:Identify OLE Project protection within documents.
Rule name:malware_shellcode_hash
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect shellcode api hash value
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:pdb_YARAify
Create hunting rule
Author:@wowabiy314
Description:PDB
Rule name:vbaproject_bin
Create hunting rule
Author:CD_R0M_
Description:{76 62 61 50 72 6f 6a 65 63 74 2e 62 69 6e} is hex for vbaproject.bin. Macros are often used by threat actors. Work in progress - Ran out of time

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

NetWire

Excel file xlsm e7df88b691f820535f249821d16054a01f33e0acf3ae12d0b64f98cced910012

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/335209/
  
Dropping
NetWire

Comments