MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b8d81833a76f3d5c51f07e5c27a01a5dabacc02e5f6fbeb60357959b1b84c338. 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: 10


Intelligence 10 IOCs YARA 26 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b8d81833a76f3d5c51f07e5c27a01a5dabacc02e5f6fbeb60357959b1b84c338
SHA3-384 hash: 7a434d37ab225b194c1093d4887f87cd77bc57708b4834619bec3299042c28aac57cecf33124149b95c63e3f5b2ad7f3
SHA1 hash: bb0fb42b226c6e8884bd4ee01f7224b1c8633fb5
MD5 hash: 8f6f275f48f2f96b3379731245541eed
humanhash: twelve-fifteen-speaker-emma
File name:Facturas vencidas, 0098, 0099, 00976, 009668, 009678, 0056598433.bz2
Download: download sample
Signature AgentTesla
Create hunting rule
File size:540'897 bytes
First seen:2025-06-22 12:15:25 UTC
Last seen:Never
File type: rar
MIME type:application/x-rar
ssdeep 12288:RE7gw/kK/tcrPF+OoHhsk45XQrgVX6inwrcn1NiE/:REkw/kNrElBM5XFX9gc1gE/
TLSH T185B4227A7B5A87EF82C0E1158923E90D76313F3F8D48F279BE95C7DA43DA848591E420
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 bz2 file-pumped rar


Avatar
cocaman
Malicious email (T1566.001)
From: "Garduno Juan Jose <JuanJose.Garduno@swarovski.com>" (likely spoofed)
Received: "from hpongat5.aiotelvienna.org (unknown [107.173.37.227]) "
Date: "21 May 2025 14:14:57 -0700"
Subject: "R: estado de cuentas"
Attachment: "Facturas vencidas, 0098, 0099, 00976, 009668, 009678, 0056598433.bz2"

Intelligence

File Origin
# of uploads :
1
# of downloads :
80
Origin country :
CH CH
File Archive Information

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

File name:Facturas vencidas, 0098, 0099, 00976, 009668, 009678, 0056598433.exe
Pumped file This file is pumped. MalwareBazaar has de-pumped it.
File size:104'857'600 bytes
SHA256 hash: 6def19ff064b483ca1860f9982fba19932d6f5cc99ba08014cfdacc7bebe1499
MD5 hash: fddf7b290cee809b185e299faa98e196
De-pumped file size:1'044'480 bytes (Vs. original size of 104'857'600 bytes)
De-pumped SHA256 hash: e70173f5db17f0d84e0b7d4a6f876351bc33c677815165d0444b6fad7b052911
De-pumped MD5 hash: 3acbc231baa122446c9066abadb98d0f
MIME type:application/x-dosexec
Signature AgentTesla
Vendor Threat Intelligence
Verdict:
Malicious
Score:
90.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6857f3efb06783b9ebd699b7
Tags:
autoit virus hype
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug autoit compiled-script evasive expand fingerprint keylogger lolbin lolbin masquerade microsoft_visual_cc overlay packed rasautou
Link:
https://www.filescan.io/uploads/6857f3f266c4b5c0b99c2cf2/reports/a7693336-fa14-4d96-856c-08bfbe0dbc1f/overview
Verdict:
Malicious
Labled as:
HEUR/Pumpar.Generic
Link:
https://www.hybrid-analysis.com/sample/b8d81833a76f3d5c51f07e5c27a01a5dabacc02e5f6fbeb60357959b1b84c338
Verdict:
Malware
YARA:
1 match(es)
Tags:
AutoIt Decompiled Executable PE (Portable Executable) Rar Archive Suspect
Link:
https://app.malva.re/file/8f6f275f48f2f96b3379731245541eed
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b8d81833a76f3d5c51f07e5c27a01a5dabacc02e5f6fbeb60357959b1b84c338/
Verdict:
Malicious
Link:
https://tip.neiki.dev/file/b8d81833a76f3d5c51f07e5c27a01a5dabacc02e5f6fbeb60357959b1b84c338
Threat name:
Win32.Trojan.AutoitInject
Create hunting rule
Status:
Malicious
First seen:
2025-05-21 12:17:18 UTC
File Type:
Binary (Archive)
Extracted files:
29
AV detection:
20 of 38 (52.63%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=xdmbqm5hn46vyupqpzocpia2lwv2zqbol5x35nqdk6kzwg4eym4a._file
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla discovery keylogger spyware stealer trojan
Link:
https://tria.ge/reports/250622-qkqm1sdm81/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Looks up external IP address via web service
AgentTesla
Agenttesla family
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
AgentTesla
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/b8d81833a76f3d5c51f07e5c27a01a5dabacc02e5f6fbeb60357959b1b84c338

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:AutoIT_Compiled
Create hunting rule
Author:@bartblaze
Description:Identifies compiled AutoIT script (as EXE). This rule by itself does NOT necessarily mean the detected file is malicious.
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__RemoteAPI
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:INDICATOR_EXE_Packed_GEN01
Create hunting rule
Author:ditekSHen
Description:Detect packed .NET executables. Mostly AgentTeslaV4.
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_SandboxHookingDLL
Create hunting rule
Author:ditekSHen
Description:Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion
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:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
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: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>
Rule name:YahLover
Create hunting rule
Author:Kevin Falcoz
Description:YahLover

File information

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

Malspam

AgentTesla

rar b8d81833a76f3d5c51f07e5c27a01a5dabacc02e5f6fbeb60357959b1b84c338

(this sample)

6def19ff064b483ca1860f9982fba19932d6f5cc99ba08014cfdacc7bebe1499

  
Delivery method
Distributed via e-mail attachment
  
Dropping
SHA256 6def19ff064b483ca1860f9982fba19932d6f5cc99ba08014cfdacc7bebe1499
  
Dropping
AgentTesla
  
Dropping
SHA256 e70173f5db17f0d84e0b7d4a6f876351bc33c677815165d0444b6fad7b052911
  
Dropping
MD5 3acbc231baa122446c9066abadb98d0f

Comments