MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c4335b63b88745fa1a6ac3c8b8af16ef7eac10ee38ee4afe35cd66a469e858cc. 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


AsyncRAT


Vendor detections: 8


Intelligence 8 IOCs YARA 26 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c4335b63b88745fa1a6ac3c8b8af16ef7eac10ee38ee4afe35cd66a469e858cc
SHA3-384 hash: 621d349ed52ea35bf0ae6b157ca2e595a27b6fab901670226adce21214ebead892163f86e87ac906ca02221a4907b5be
SHA1 hash: a637bc6995a6d20136971dde9f174436e671e938
MD5 hash: 42147edd19e9c069ba1cf622a7a800ef
humanhash: freddie-muppet-foxtrot-dakota
File name:INVOICE.rar
Download: download sample
Signature AsyncRAT
Create hunting rule
File size:755'610 bytes
First seen:2023-11-21 07:48:51 UTC
Last seen:Never
File type: rar
MIME type:application/x-rar
ssdeep 12288:6FBBW+kb39TMNKb/dqZJBDnRkgMbbqZ//QHtNeIAWs2RgoccVt3kxRAqPUqqg:gkbNcKb/YZJtnRkgm2Z/UkIAF2SoExRf
TLSH T1FFF423321847801EE9A69FDE6A4D883C51DA7E85DDECF74218861C9D7420304D7AFEBB
TrID 61.5% (.RAR) RAR compressed archive (v5.0) (8000/1)
38.4% (.RAR) RAR compressed archive (gen) (5000/1)
Reporter cocaman
Tags:INVOICE rar


Avatar
cocaman
Malicious email (T1566.001)
From: "Nicholsons Solicitors <info@nicholsonslaw.com>" (likely spoofed)
Received: "from nicholsonslaw.com (unknown [104.129.27.19]) "
Date: "20 Nov 2023 18:25:30 -0800"
Subject: "Overdue Invoice"
Attachment: "INVOICE.rar"

Intelligence

File Origin
# of uploads :
1
# of downloads :
106
Origin country :
CH CH
File Archive Information

This file archive contains 1 file(s), sorted by their relevance:

File name:INVOICE.exe
File size:778'752 bytes
SHA256 hash: 0d2d25f45c008b22385ef8f7a21d9d51d0269c0f55802da3ef34c522f6ef7f51
MD5 hash: f87f3da7e4319dc7c9aa712ad633040e
MIME type:application/x-dosexec
Signature AsyncRAT
Vendor Threat Intelligence
Result
Verdict:
Unknown
File Type:
PE File
Link:
https://app.docguard.net/c4335b63b88745fa1a6ac3c8b8af16ef7eac10ee38ee4afe35cd66a469e858cc/results/dashboard
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
masquerade packed
Link:
https://www.filescan.io/uploads/655c60eef2d318f0e04a60d7/reports/a2aee02e-9c28-40dd-ae66-e7df48322b3e/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/c4335b63b88745fa1a6ac3c8b8af16ef7eac10ee38ee4afe35cd66a469e858cc
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c4335b63b88745fa1a6ac3c8b8af16ef7eac10ee38ee4afe35cd66a469e858cc/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2023-11-21 07:48:55 UTC
File Type:
Binary (Archive)
Extracted files:
12
AV detection:
14 of 38 (36.84%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=yqzvwy5yq5c7ugtkypelrlyw557kyehohdxev7rvzvtki2pildga._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla family:asyncrat family:remcos botnet:default botnet:host keylogger persistence rat spyware stealer trojan
Link:
https://tria.ge/reports/231121-jqd3vada82/
Behaviour
Creates scheduled task(s)
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Drops file in System32 directory
Suspicious use of SetThreadContext
Adds Run key to start application
Looks up external IP address via web service
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Async RAT payload
AgentTesla
AsyncRat
Remcos
Malware Config
C2 Extraction:
104.129.27.19:6606
104.129.27.19:7707
104.129.27.19:8808
104.129.27.19:2404
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/c4335b63b88745fa1a6ac3c8b8af16ef7eac10ee38ee4afe35cd66a469e858cc

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:AgentTeslaV3
Create hunting rule
Author:ditekshen
Description:AgentTeslaV3 infostealer payload
Rule name:BitcoinAddress
Create hunting rule
Author:Didier Stevens (@DidierStevens)
Description:Contains a valid Bitcoin address
Rule name:CMD_Ping_Localhost
Create hunting rule
Rule name:INDICATOR_EXE_Packed_GEN01
Create hunting rule
Author:ditekSHen
Description:Detect packed .NET executables. Mostly AgentTeslaV4.
Rule name:INDICATOR_EXE_Packed_MPress
Create hunting rule
Author:ditekSHen
Description:Detects executables built or packed with MPress PE compressor
Rule name:INDICATOR_SUSPICIOUS_Binary_References_Browsers
Create hunting rule
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
Create hunting rule
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
Create hunting rule
Author:ditekSHen
Description:Detects executables referencing many email and collaboration clients. Observed in information stealers
Rule name:INDICATOR_SUSPICIOUS_EXE_Referenfces_File_Transfer_Clients
Create hunting rule
Author:ditekSHen
Description:Detects executables referencing many file transfer clients. Observed in information stealers
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
Create hunting rule
Author:ditekSHen
Description:detects Windows exceutables potentially bypassing UAC using eventvwr.exe
Rule name:INDICATOR_SUSPICIOUS_EXE_VaultSchemaGUID
Create hunting rule
Author:ditekSHen
Description:Detects executables referencing Windows vault credential objects. Observed in infostealers
Rule name:maldoc_find_kernel32_base_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:maldoc_getEIP_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:malware_Agenttesla_type2
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Agenttesla in memory
Reference:internal research
Rule name:malware_Remcos_strings
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Remcos in memory
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:remcos_rat
Create hunting rule
Author:jeFF0Falltrades
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:TeslaCryptPackedMalware
Create hunting rule
Rule name:win_remcos_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.remcos.
Rule name:win_remcos_g0
Create hunting rule
Author:Daniel Plohmann <daniel.plohmann<at>fkie.fraunhofer.de>

File information

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

Malspam

AsyncRAT

rar c4335b63b88745fa1a6ac3c8b8af16ef7eac10ee38ee4afe35cd66a469e858cc

(this sample)

AsyncRAT

Executable exe 0d2d25f45c008b22385ef8f7a21d9d51d0269c0f55802da3ef34c522f6ef7f51

  
Delivery method
Distributed via e-mail attachment
  
Dropping
SHA256 0d2d25f45c008b22385ef8f7a21d9d51d0269c0f55802da3ef34c522f6ef7f51
  
Dropping
MD5 f87f3da7e4319dc7c9aa712ad633040e

Comments