MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 41f76926477c7f8759900567ced4e5e1f9057e40d2a151badc873d23f372997e. 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


Formbook


Vendor detections: 9


Intelligence 9 IOCs YARA 17 File information Comments
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SHA256 hash: 41f76926477c7f8759900567ced4e5e1f9057e40d2a151badc873d23f372997e
SHA3-384 hash: 647ae0e355b98bc29b02257be5cb00d1917395a54cbbefc3ed1c8ed3023eb2fc8d443f5b5693d6e37efe988e41bfb6f1
SHA1 hash: 0a64b4f2424ada6c4b8efe421f78ab43f8372bf0
MD5 hash: 63f6f06c380e5d1ce7325b504b5a27fc
humanhash: edward-quebec-harry-cat
File name:comprobante_swift89534657687.js
Download: download sample
Signature Formbook
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File size:1'450 bytes
First seen:2024-02-23 16:22:40 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 24:QZHtIH+GN7ngN7nGN7njesYOrAATYawN2QSqjqSTzaZ7e:0IH+G5ssYVCQSqmSTzag
TLSH T13531911277E58259F2F75B48973328340B3BBE56593DD14D06D82C4D0EF3A0889A6BE7
TrID 66.6% (.TXT) Text - UTF-16 (LE) encoded (2000/1)
33.3% (.MP3) MP3 audio (1000/1)
Reporter abuse_ch
Tags:FormBook js

Intelligence

File Origin
# of uploads :
1
# of downloads :
352
Origin country :
NL NL
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.Script.SNH-gen.29004.21970.UNOFFICIAL
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Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
nemucod obfuscated sload virus
Link:
https://www.filescan.io/uploads/65d8c66d781f571646411081/reports/8523c474-22a5-4036-8b67-7c37167326d8/overview
Verdict:
Malicious
Labled as:
JS/TrojanDownloader.Agent
Link:
https://www.hybrid-analysis.com/sample/41f76926477c7f8759900567ced4e5e1f9057e40d2a151badc873d23f372997e
Result
Verdict:
MALICIOUS
Result
Threat name:
AgentTesla
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Detection:
malicious
Classification:
spre.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1397804
Signature
Antivirus detection for URL or domain
Check if machine is in data center or colocation facility
Connects to a pastebin service (likely for C&C)
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Found malware configuration
Injects a PE file into a foreign processes
JScript performs obfuscated calls to suspicious functions
Malicious sample detected (through community Yara rule)
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sigma detected: Bad Opsec Defaults Sacrificial Processes With Improper Arguments
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: Potential PowerShell Obfuscation Via Reversed Commands
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: Powershell download and load assembly
Sigma detected: Powershell download payload from hardcoded c2 list
Sigma detected: Script Initiated Connection to Non-Local Network
Sigma detected: WScript or CScript Dropper
Snort IDS alert for network traffic
Suspicious execution chain found
Suspicious powershell command line found
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
Yara detected AgentTesla
Yara detected Generic Downloader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1397804 Sample: comprobante_swift89534657687.js Startdate: 23/02/2024 Architecture: WINDOWS Score: 100 24 paste.ee 2->24 26 ip-api.com 2->26 42 Snort IDS alert for network traffic 2->42 44 Found malware configuration 2->44 46 Malicious sample detected (through community Yara rule) 2->46 50 12 other signatures 2->50 8 wscript.exe 1 19 2->8         started        signatures3 48 Connects to a pastebin service (likely for C&C) 24->48 process4 dnsIp5 28 paste.ee 104.21.84.67, 443, 49706 CLOUDFLARENETUS United States 8->28 52 JScript performs obfuscated calls to suspicious functions 8->52 54 Suspicious powershell command line found 8->54 56 Wscript starts Powershell (via cmd or directly) 8->56 58 2 other signatures 8->58 12 powershell.exe 14 16 8->12         started        signatures6 process7 dnsIp8 30 45.74.19.84, 49707, 80 HVC-ASUS United States 12->30 32 172.245.214.91, 49708, 80 AS-COLOCROSSINGUS United States 12->32 60 Writes to foreign memory regions 12->60 62 Suspicious execution chain found 12->62 64 Injects a PE file into a foreign processes 12->64 16 RegAsm.exe 15 2 12->16         started        20 conhost.exe 12->20         started        signatures9 process10 dnsIp11 22 ip-api.com 208.95.112.1, 49712, 80 TUT-ASUS United States 16->22 34 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 16->34 36 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 16->36 38 Tries to steal Mail credentials (via file / registry access) 16->38 40 3 other signatures 16->40 signatures12
Score:
5%
Verdict:
Benign
File Type:
SCRIPT
Link:
https://malprob.io/report/41f76926477c7f8759900567ced4e5e1f9057e40d2a151badc873d23f372997e
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/41f76926477c7f8759900567ced4e5e1f9057e40d2a151badc873d23f372997e/
Threat name:
Win32.Trojan.Generic
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Status:
Suspicious
First seen:
2024-02-23 16:23:07 UTC
File Type:
Text (JavaScript)
AV detection:
6 of 24 (25.00%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=ih3wsjshpr7yowmqavt45vhf4h4qk7sa2kqvdow4q46sh43stf7a._file
Result
Malware family:
agenttesla
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Score:
  10/10
Tags:
family:agenttesla keylogger spyware stealer trojan
Link:
https://tria.ge/reports/240223-tvs3nsda98/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Looks up external IP address via web service
Checks computer location settings
Reads user/profile data of local email clients
Reads user/profile data of web browsers
Blocklisted process makes network request
AgentTesla
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/41f76926477c7f8759900567ced4e5e1f9057e40d2a151badc873d23f372997e

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:AgentTeslaV2
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Author:ditekshen
Description:AgenetTesla Type 2 Keylogger payload
Rule name:AgentTeslaV3
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Author:ditekshen
Description:AgentTeslaV3 infostealer payload
Rule name:DebuggerCheck__RemoteAPI
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Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:INDICATOR_EXE_Packed_GEN01
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Author:ditekSHen
Description:Detect packed .NET executables. Mostly AgentTeslaV4.
Rule name:INDICATOR_SUSPICIOUS_Binary_References_Browsers
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Author:ditekSHen
Description:Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.
Rule name:INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store
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Author:ditekSHen
Description:Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers
Rule name:INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients
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Author:ditekSHen
Description:Detects executables referencing many email and collaboration clients. Observed in information stealers
Rule name:INDICATOR_SUSPICIOUS_EXE_Referenfces_File_Transfer_Clients
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Author:ditekSHen
Description:Detects executables referencing many file transfer clients. Observed in information stealers
Rule name:INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
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Author:ditekSHen
Description:Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion
Rule name:INDICATOR_SUSPICIOUS_EXE_VaultSchemaGUID
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Author:ditekSHen
Description:Detects executables referencing Windows vault credential objects. Observed in infostealers
Rule name:malware_Agenttesla_type2
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Author:JPCERT/CC Incident Response Group
Description:detect Agenttesla in memory
Reference:internal research
Rule name:MALWARE_Win_AgentTeslaV2
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Author:ditekSHen
Description:AgenetTesla Type 2 Keylogger payload
Rule name:NETexecutableMicrosoft
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Author:malware-lu
Rule name:pe_imphash
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Rule name:Skystars_Malware_Imphash
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Author:Skystars LightDefender
Description:imphash
Rule name:Windows_Generic_Threat_779cf969
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Author:Elastic Security
Rule name:Windows_Trojan_AgentTesla_ebf431a8
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Author:Elastic Security
Reference:https://www.elastic.co/security-labs/attack-chain-leads-to-xworm-and-agenttesla

File information

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

Malspam

Formbook

Java Script (JS) js 41f76926477c7f8759900567ced4e5e1f9057e40d2a151badc873d23f372997e

(this sample)

  
Delivery method
Distributed via e-mail attachment

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