MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b3aaca759c482306405335f368f4dade55cc35c21d8de712ca4fe77de274a55a. 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


AgentTesla


Vendor detections: 8


Intelligence 8 IOCs YARA 27 File information Comments
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SHA256 hash: b3aaca759c482306405335f368f4dade55cc35c21d8de712ca4fe77de274a55a
SHA3-384 hash: 1a3f14e6e34feb029f8af6e7d965ab5043c466f4b5bafc701326b854616f47a905f607d19a95f8a3f5f8ba4b7862e9da
SHA1 hash: 4b496fe85bb19e579ba8c45e5a3bd26ea7d5d0d5
MD5 hash: a7f39e7eba17ecc0cdc71f95f9df76f0
humanhash: grey-fourteen-asparagus-lamp
File name:New PO#28142.rar
Download: download sample
Signature AgentTesla
Create hunting rule
File size:652'805 bytes
First seen:2025-09-15 07:36:19 UTC
Last seen:Never
File type: rar
MIME type:application/x-rar
ssdeep 12288:IeP0p1zvjzN6flNYTibrC67o9ue/By2TnoaDXdBYQyIbIe8EF7ZPiQjkHBiEZ2dI:IePczPvCYtbrXppIJUJkcEOI
TLSH T176D42364B7AB0941F1ACE9047949CD5E9F8A550D30380B69618EB29F3C1EE21ECDDD3E
TrID 61.5% (.RAR) RAR compressed archive (v5.0) (8000/1)
38.4% (.RAR) RAR compressed archive (gen) (5000/1)
Magika rar
Reporter cocaman
Tags:AgentTesla rar


Avatar
cocaman
Malicious email (T1566.001)
From: "purchasing<purchasing@ketopumps.com>" (likely spoofed)
Received: "from mx1.dreamhost.com (216-131-112-239.ams.as62651.net [216.131.112.239]) "
Date: "12 Sep 2025 22:47:37 -0700"
Subject: "Notification of New Purchase Order 28142"
Attachment: "New PO#28142.rar"

Intelligence

File Origin
# of uploads :
1
# of downloads :
56
Origin country :
CH CH
File Archive Information

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

File name:New PO#28142..scr
File size:721'416 bytes
SHA256 hash: c4133609748071a200e855b6681ce59b918d73fea3a3aa67c7053af38cfda2f2
MD5 hash: 01f5a219c17b81c5401e6b66f09e891a
MIME type:application/x-dosexec
Signature AgentTesla
Vendor Threat Intelligence
Verdict:
Malicious
Score:
97.4%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68c7c207d49ea3f1e4b5d593
Tags:
spawn shell micro
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
expired-cert invalid-signature packed signed
Link:
https://www.filescan.io/uploads/68c7c20073287948292a2663/reports/1fce6f3c-b33f-4a72-bc88-9e4214d03dca/overview
Verdict:
Suspicious
Labled as:
Mal/DrodRar
Link:
https://www.hybrid-analysis.com/sample/b3aaca759c482306405335f368f4dade55cc35c21d8de712ca4fe77de274a55a
Verdict:
Malicious
File Type:
rar
First seen:
2025-09-12T18:47:00Z UTC
Last seen:
2025-09-12T18:47:00Z UTC
Hits:
~100
Link:
https://opentip.kaspersky.com/b3aaca759c482306405335f368f4dade55cc35c21d8de712ca4fe77de274a55a/results?tab=lookup
Verdict:
inconclusive
YARA:
1 match(es)
Tags:
.Net Executable Managed .NET PDB Path PE (Portable Executable) PE File Layout Rar Archive SOS: 0.28
Link:
https://app.malva.re/file/a7f39e7eba17ecc0cdc71f95f9df76f0
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b3aaca759c482306405335f368f4dade55cc35c21d8de712ca4fe77de274a55a/
Threat name:
ByteCode-MSIL.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2025-09-13 00:34:06 UTC
File Type:
Binary (Archive)
Extracted files:
10
AV detection:
19 of 24 (79.17%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=wovmu5m4jarqmqctgxzwr5g23zk4ynocdwg6oewkj7tx3ytuuvna._file
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla discovery execution keylogger persistence spyware stealer trojan
Link:
https://tria.ge/reports/250915-jzk8hsvqx6/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Checks computer location settings
Reads WinSCP keys stored on the system
Reads data files stored by FTP clients
Reads user/profile data of local email clients
Reads user/profile data of web browsers
Command and Scripting Interpreter: PowerShell
AgentTesla
Agenttesla family
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.00
Link:
https://yomi.yoroi.company/submissions/b3aaca759c482306405335f368f4dade55cc35c21d8de712ca4fe77de274a55a

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:agentesla
Create hunting rule
Author:Michelle Khalil
Description:This rule detects unpacked agenttesla malware samples.
Rule name:AgentTeslaV3
Create hunting rule
Author:ditekshen
Description:AgentTeslaV3 infostealer payload
Rule name:AgentTeslaV5
Create hunting rule
Author:ClaudioWayne
Description:AgentTeslaV5 infostealer payload
Rule name:Agenttesla_type2
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Agenttesla in memory
Reference:internal research
Rule name:CP_AllMal_Detector
Create hunting rule
Author:DiegoAnalytics
Description:CrossPlatform All Malwares Detector: Detect PE, ELF, Mach-O, scripts, archives; overlay, obfuscation, encryption, spoofing, hiding, high entropy, network communication
Rule name:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:INDICATOR_EXE_Packed_GEN01
Create hunting rule
Author:ditekSHen
Description:Detect packed .NET executables. Mostly AgentTeslaV4.
Rule name:INDICATOR_KB_CERT_7c1118cbbadc95da3752c46e47a27438
Create hunting rule
Author:ditekSHen
Description:Detects executables signed with stolen, revoked or invalid certificates
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_VaultSchemaGUID
Create hunting rule
Author:ditekSHen
Description:Detects executables referencing Windows vault credential objects. Observed in infostealers
Rule name:malware_Agenttesla_type2
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Agenttesla in memory
Reference:internal research
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Sus_CMD_Powershell_Usage
Create hunting rule
Author:XiAnzheng
Description:May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)
Rule name:win32_dotnet_form_obfuscate
Create hunting rule
Author:Reedus0
Description:Rule for detecting .NET form obfuscate malware
Rule name:Windows_Generic_Threat_9f4a80b2
Create hunting rule
Author:Elastic Security
Rule name:Windows_Trojan_AgentTesla_ebf431a8
Create hunting rule
Author:Elastic Security
Reference:https://www.elastic.co/security-labs/attack-chain-leads-to-xworm-and-agenttesla
Rule name:win_agent_tesla_g2
Create hunting rule
Author:Daniel Plohmann <daniel.plohmann@fkie.fraunhofer.de>

File information

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

Malspam

AgentTesla

rar b3aaca759c482306405335f368f4dade55cc35c21d8de712ca4fe77de274a55a

(this sample)

AgentTesla

Executable exe c4133609748071a200e855b6681ce59b918d73fea3a3aa67c7053af38cfda2f2

  
Delivery method
Distributed via e-mail attachment
  
Dropping
SHA256 c4133609748071a200e855b6681ce59b918d73fea3a3aa67c7053af38cfda2f2
  
Dropping
AgentTesla
  
Dropping
MD5 01f5a219c17b81c5401e6b66f09e891a

Comments