MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d040437bdc2a5c34ca7ffeb1f46f6adf82b6e5492748ec22b630a918b53a2b95. 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


Neshta


Vendor detections: 12


Maldoc score: 23


Intelligence 12 IOCs YARA File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: d040437bdc2a5c34ca7ffeb1f46f6adf82b6e5492748ec22b630a918b53a2b95
SHA3-384 hash: 7809c2e1cc79e8cba1c0a656efbd8bca7275aa5dc170158b33212613919eda7bb198cd04564a49d4a515fcf7d9ddcd94
SHA1 hash: eec64a5c8119268b5d13873747bc3f05c33dc6cb
MD5 hash: fea600c8597e2b7931a9f6f781a2b43a
humanhash: early-steak-echo-apart
File name:AN HAI 273 V-S159 1606 KAO-BK =GG-10-2020.doc
Download: download sample
Signature Neshta
Create hunting rule
File size:310'784 bytes
First seen:2021-11-29 14:32:29 UTC
Last seen:Never
File type:Word file doc
MIME type:application/msword
ssdeep 1536:3nxrtIY3B5vkNXup808LReWulTmmxmmnmm8mmummnmmOmmrvmImmimmxmmNmmImE:BRvtXKnKkhcQoWdVOkL
TLSH T11364C75274C78E70E2849CF305AAF645B37FBF8B97226D167171774A8D36310AE48B0A
Reporter James_inthe_box
Tags:doc Neshta

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: 23
OLE dump

MalwareBazaar was able to identify 11 sections in this file using oledump:

Section IDSection sizeSection name
1114 bytesCompObj
24096 bytesDocumentSummaryInformation
34096 bytesSummaryInformation
47231 bytes1Table
5406 bytesMacros/PROJECT
671 bytesMacros/PROJECTwm
7279435 bytesMacros/VBA/NewMacros
8938 bytesMacros/VBA/ThisDocument
93038 bytesMacros/VBA/_VBA_PROJECT
10571 bytesMacros/VBA/dir
114096 bytesWordDocument
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
AutoExecAutoOpenRuns when the Word document is opened
SuspiciousOpenMay open a file
SuspiciouswriteMay write to a file (if combined with Open)
SuspiciousAdodb.StreamMay create a text file
SuspicioussavetofileMay create a text file
SuspiciousShellMay run an executable file or a system command
SuspiciousWScript.ShellMay run an executable file or a system command
SuspiciousRunMay run an executable file or a system command
SuspiciousCreateObjectMay create an OLE object
SuspiciousMicrosoft.XMLHTTPMay download files from the Internet
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 :
1
# of downloads :
160
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
AN HAI 273 V-S159 1606 KAO-BK =GG-10-2020.doc
Verdict:
Malicious activity
Analysis date:
2021-11-29 16:25:21 UTC
Tags:
macros macros-on-open
Link:
https://app.any.run/tasks/0be245d9-2d5d-48dc-b042-737255c37829

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
File type:
application/msword
Has a screenshot:
False
Contains macros:
True
Detection(s):
MiscreantPunch.EvilMacro.AODBWSRBMS.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXSTRGOOD..EXE.200225.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXSTRGOOD.HTTPS
Create hunting rule

TwinWave.EvilDoc.DOCXSTRGOOD..EXE.211019.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.Office.Macro-11.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.Office.Macro-12.UNOFFICIAL
Create hunting rule

Sanesecurity.Badmacro.Xls.Wshell.G.UNOFFICIAL
Create hunting rule

Sanesecurity.Badmacro.Xls.SaveRun.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
DNS request
Sending a custom TCP request
Creating a window
Сreating synchronization primitives
Creating a file in the %temp% directory
Sending an HTTP GET request
Unauthorized injection to a recently created process
Sending a custom TCP request by exploiting the app vulnerability
Creating a process from a recently created file
Result
Verdict:
Malicious
File Type:
Legacy Word File with Macro
Link:
https://app.docguard.net/d040437bdc2a5c34ca7ffeb1f46f6adf82b6e5492748ec22b630a918b53a2b95/results/dashboard
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
macros macros-on-open packed
Link:
https://www.filescan.io/uploads/61a4e49feffcae2254f48a7a/reports/55549458-0718-4167-b604-4430eee9dab5/overview
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/d040437bdc2a5c34ca7ffeb1f46f6adf82b6e5492748ec22b630a918b53a2b95
Details
Macro with Startup Hook
Detected macro logic that will automatically execute on document open. Most malware contains some execution hook.
Document With Few Pages
Document contains between one and three pages of content. Most malicious documents are sparse in page count.
Macro with File System Write
Detected macro logic that can write data to the file system.
Result
Threat name:
AgentTesla Neshta
Create hunting rule
Detection:
malicious
Classification:
spre.troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/898069
Signature
Adds a directory exclusion to Windows Defender
Antivirus / Scanner detection for submitted sample
Document contains an embedded VBA macro which may execute processes
Document contains an embedded VBA macro with suspicious strings
Document contains an embedded VBA with functions possibly related to ADO stream file operations
Document contains an embedded VBA with functions possibly related to HTTP operations
Document contains an embedded VBA with many string operations indicating source code obfuscation
Document exploit detected (creates forbidden files)
Document exploit detected (drops PE files)
Document exploit detected (process start blacklist hit)
Machine Learning detection for sample
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office process drops PE file
Sigma detected: MS Office Product Spawning Exe in User Dir
Sigma detected: Powershell Defender Exclusion
Sigma detected: Suspicius Add Task From User AppData Temp
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AgentTesla
Yara detected AntiVM3
Yara detected Neshta
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 530556 Sample: AN HAI 273 V-S159 1606 KAO-... Startdate: 29/11/2021 Architecture: WINDOWS Score: 100 38 Antivirus / Scanner detection for submitted sample 2->38 40 Multi AV Scanner detection for dropped file 2->40 42 Multi AV Scanner detection for submitted file 2->42 44 16 other signatures 2->44 7 WINWORD.EXE 296 34 2->7         started        process3 dnsIp4 34 bitllab.com.br 192.185.77.98, 443, 49165 UNIFIEDLAYER-AS-1US United States 7->34 36 www.bitllab.com.br 7->36 24 abcdefghijklmnopqr...vwxyz0123456789.exe, PE32 7->24 dropped 26 C:\Users\user\AppData\Local\...\rfq[1].exe, PE32 7->26 dropped 28 C:\Users\user\...\~DF729D4315042E35AB.TMP, Composite 7->28 dropped 46 Document exploit detected (creates forbidden files) 7->46 12 abcdefghijklmnopqrstuvwxyz0123456789bcdefghijklmnopqrstuvwxyz0123456789.exe 3 7->12         started        file5 signatures6 process7 file8 30 C:\Users\user\AppData\Roaming\PvHZQvCKp.exe, PE32 12->30 dropped 32 C:\Users\user\AppData\Local\...\tmp35C1.tmp, XML 12->32 dropped 48 Multi AV Scanner detection for dropped file 12->48 50 Uses schtasks.exe or at.exe to add and modify task schedules 12->50 52 Adds a directory exclusion to Windows Defender 12->52 16 powershell.exe 6 12->16         started        18 schtasks.exe 12->18         started        20 abcdefghijklmnopqrstuvwxyz0123456789bcdefghijklmnopqrstuvwxyz0123456789.exe 12->20         started        22 4 other processes 12->22 signatures9 process10
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/d040437bdc2a5c34ca7ffeb1f46f6adf82b6e5492748ec22b630a918b53a2b95/
Threat name:
Script-Macro.Trojan.Heuristic
Create hunting rule
Status:
Malicious
First seen:
2021-11-29 14:32:33 UTC
File Type:
Document
Extracted files:
18
AV detection:
18 of 44 (40.91%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=2baeg664fjodjst772y7i33k36blnzkje5eoyivwgcurrnj2fokq._file
Result
Malware family:
neshta
Create hunting rule
Score:
  10/10
Tags:
family:neshta macro macro_on_action persistence spyware stealer
Link:
https://tria.ge/reports/211129-rwvlsafce6/
Behaviour
Checks processor information in registry
Creates scheduled task(s)
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies registry class
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
Drops file in Program Files directory
Drops file in Windows directory
Suspicious use of SetThreadContext
Reads user/profile data of web browsers
Executes dropped EXE
Detect Neshta Payload
Modifies system executable filetype association
Neshta
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/d040437bdc2a/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/d040437bdc2a5c34ca7ffeb1f46f6adf82b6e5492748ec22b630a918b53a2b95

File information

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

  
Delivery method
Other

Comments