MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a8ac40da7f243063370948e3a9d1c2f6d9ff5574d313631808b57b1040e99f7b. 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


AurotunStealer


Vendor detections: 16


Intelligence 16 IOCs YARA 22 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a8ac40da7f243063370948e3a9d1c2f6d9ff5574d313631808b57b1040e99f7b
SHA3-384 hash: 6355d1c3fbe60e028caf024f3ca04dd49ee8699bc438b73484bfbd369ff94935792357032a66de7ba658fb8fc3e9a76b
SHA1 hash: 48ba30ba76b6a35d48d825dd18290cef10145803
MD5 hash: dbfc4f542458645a5c91117d46016e5e
humanhash: music-tango-romeo-nine
File name:megago.exe
Download: download sample
Signature AurotunStealer
Create hunting rule
File size:8'235'008 bytes
First seen:2025-09-12 14:41:50 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 0e531ed9037ef0ab63aba0acf8b12aff (1 x AurotunStealer)
ssdeep 196608:9YAb+WpRIOei9BWSVv1NfODX5z/yVDQG:Pyah1ODX5eV
Threatray 14 similar samples on MalwareBazaar
TLSH T14F86021E769902E8F177D07CC6EA9A5BF671740C0720ABC706E0469D2F17AD84ABF712
TrID 44.4% (.EXE) Win64 Executable (generic) (10522/11/4)
21.3% (.EXE) Win16 NE executable (generic) (5038/12/1)
8.7% (.ICL) Windows Icons Library (generic) (2059/9)
8.5% (.EXE) OS/2 Executable (generic) (2029/13)
8.4% (.EXE) Generic Win/DOS Executable (2002/3)
Magika pebin
Reporter abuse_ch
Tags:AurotunStealer exe

Intelligence

File Origin
# of uploads :
1
# of downloads :
76
Origin country :
SE SE
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Terms.pdf.lnk
Verdict:
Malicious activity
Analysis date:
2025-09-12 07:33:58 UTC
Tags:
susp-lnk evasion aurotun stealer loader
Link:
https://app.any.run/tasks/b85acf16-608f-4d8c-bf02-6e201b0957e1

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/27160/
Verdict:
Clean
Score:
89.3%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68c3e5096e66ba602d7adf4f
Tags:
n/a
Result
Verdict:
Malware
Maliciousness:

Behaviour
Using the Windows Management Instrumentation requests
Creating a process with a hidden window
Creating a file in the system32 directory
Сreating synchronization primitives
Connection attempt
Sending a custom TCP request
DNS request
Sending an HTTP GET request
Sending a TCP request to an infection source
Connection attempt to an infection source
Setting a global event handler for the keyboard
Adding an exclusion to Microsoft Defender
Enabling autorun by creating a file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
anti-debug anti-vm anti-vm fingerprint microsoft_visual_cc obfuscated packed packed packer_detected
Link:
https://www.filescan.io/uploads/68c431c90d1238ff0aaae55a/reports/3c4fb6f0-76c6-4c3c-88c3-2fe82fd5990e/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_90%
Link:
https://www.hybrid-analysis.com/sample/a8ac40da7f243063370948e3a9d1c2f6d9ff5574d313631808b57b1040e99f7b
Verdict:
Malicious
File Type:
exe x64
First seen:
2025-09-11T15:29:00Z UTC
Last seen:
2025-09-11T15:29:00Z UTC
Hits:
~100
Detections:
VHO:Trojan-PSW.Win32.Lumma.gen Trojan-PSW.Win32.Lumma.vza Trojan.Win32.Agent.sb Trojan-PSW.Win32.Lumma.vrd NetTool.cURLGet.HTTP.C&C
Link:
https://opentip.kaspersky.com/a8ac40da7f243063370948e3a9d1c2f6d9ff5574d313631808b57b1040e99f7b/results?tab=lookup
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/30c36455-38e9-4021-ac5f-3753b33f843a
Result
Threat name:
Aurotun Stealer
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
88 / 100
Link:
https://www.joesandbox.com/analysis/1776553
Signature
Adds a directory exclusion to Windows Defender
Antivirus detection for dropped file
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Multi AV Scanner detection for submitted file
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Suricata IDS alerts for network traffic
Yara detected Aurotun Stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1776553 Sample: megago.exe Startdate: 12/09/2025 Architecture: WINDOWS Score: 88 26 api.ipify.org 2->26 34 Suricata IDS alerts for network traffic 2->34 36 Antivirus detection for dropped file 2->36 38 Multi AV Scanner detection for submitted file 2->38 40 3 other signatures 2->40 8 megago.exe 1 2->8         started        13 megago.exe 2->13         started        signatures3 process4 dnsIp5 28 87.120.93.155, 49687, 7712 INTERKVMRO Bulgaria 8->28 30 api.ipify.org 104.26.13.205, 443, 49690 CLOUDFLARENETUS United States 8->30 32 127.0.0.1 unknown unknown 8->32 24 C:\Windows\System32\HealthSystem.exe, PE32+ 8->24 dropped 42 Adds a directory exclusion to Windows Defender 8->42 15 powershell.exe 23 8->15         started        18 powershell.exe 13->18         started        file6 signatures7 process8 signatures9 44 Loading BitLocker PowerShell Module 15->44 20 conhost.exe 15->20         started        22 conhost.exe 18->22         started        process10
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/a8ac40da7f243063370948e3a9d1c2f6d9ff5574d313631808b57b1040e99f7b
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a8ac40da7f243063370948e3a9d1c2f6d9ff5574d313631808b57b1040e99f7b/
Verdict:
Malicious
Threat:
Family.AUROTUN
Link:
https://tip.neiki.dev/file/a8ac40da7f243063370948e3a9d1c2f6d9ff5574d313631808b57b1040e99f7b
Threat name:
Win64.Trojan.Nekark
Create hunting rule
Status:
Malicious
First seen:
2025-09-11 18:13:04 UTC
File Type:
PE+ (Exe)
Extracted files:
1
AV detection:
22 of 38 (57.89%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=vcwebwt7eqyggnyjjdr2tuoc63m76vlu2mjwggaiwv5raqhjt55q._file
Verdict:
malicious
Label(s):
aurotunstealer
Create hunting rule
monstercrypt
Create hunting rule
Similar samples:
1fed6f7856a8772fd69a539c8ac6a9eb3a80ee1b776bf9e032eec949c68568d6
AurotunStealer
4dc054d5fe102931737b743782ff42688171d525209b580e7a8f628045478646
AurotunStealer
631b8003b56f1381af44cf157d7c08aaa8f958909a3feab4f1b245eeca7427a1
AurotunStealer
8a340724e426da456a100671b80c0c59324178ef80456eaf64f266b2e8dbd789
AurotunStealer
a8ac40da7f243063370948e3a9d1c2f6d9ff5574d313631808b57b1040e99f7b
AurotunStealer
dd57e2088e25c5bd7669450207e89d0c529c056800fd938ef914d8810102511d
AurotunStealer
error
AurotunStealer
+ 4 additional samples on MalwareBazaar
Result
Malware family:
aurotun
Create hunting rule
Score:
  10/10
Tags:
family:aurotun campaign:megago execution persistence stealer
Link:
https://tria.ge/reports/250912-r37vpahn5y/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Drops file in System32 directory
Looks up external IP address via web service
Checks computer location settings
Command and Scripting Interpreter: PowerShell
Aurotun
Aurotun family
Detects Aurotun stealer
Malware Config
C2 Extraction:
87.120.93.155:7712
Verdict:
Malicious
Tags:
External_IP_Lookup
YARA:
n/a
Link:
https://app.threat.zone/submission/31885afb-c956-466d-ad44-0fa46e72edbe
Unpacked files
SH256 hash:
a8ac40da7f243063370948e3a9d1c2f6d9ff5574d313631808b57b1040e99f7b
MD5 hash:
dbfc4f542458645a5c91117d46016e5e
SHA1 hash:
48ba30ba76b6a35d48d825dd18290cef10145803
Link:
https://www.unpac.me/results/4b319285-32b3-44c8-9877-0976ba7e33f1/
Malware family:
MonsterV2
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a8ac40da7f24/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/a8ac40da7f243063370948e3a9d1c2f6d9ff5574d313631808b57b1040e99f7b

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:BLOWFISH_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for Blowfish constants
Rule name:botnet_plaintext_c2
Create hunting rule
Author:cip
Description:Attempts to match at least some of the strings used in some botnet variants which use plaintext communication protocols.
Rule name:Check_OutputDebugStringA_iat
Create hunting rule
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:CP_Script_Inject_Detector
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerException__SetConsoleCtrl
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:ICMLuaUtil_UACMe_M41
Create hunting rule
Author:Marius 'f0wL' Genheimer <hello@dissectingmalwa.re>
Description:A Yara rule for UACMe Method 41 -> ICMLuaUtil Elevated COM interface
Reference:https://github.com/hfiref0x/UACME
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:Mimikatz_Generic
Create hunting rule
Author:Still
Description:attempts to match all variants of Mimikatz
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:RANSOMWARE
Create hunting rule
Author:ToroGuitar
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:SHA512_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA384/SHA512 constants
Rule name:skip20_sqllang_hook
Create hunting rule
Author:Mathieu Tartare <mathieu.tartare@eset.com>
Description:YARA rule to detect if a sqllang.dll version is targeted by skip-2.0. Each byte pattern corresponds to a function hooked by skip-2.0. If $1_0 or $1_1 match, it is probably targeted as it corresponds to the hook responsible for bypassing the authentication.
Reference:https://www.welivesecurity.com/
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:upxHook
Create hunting rule
Author:@r3dbU7z
Description:Detect artifacts from 'upxHook' - modification of UPX packer
Reference:https://bazaar.abuse.ch/sample/6352be8aa5d8063673aa428c3807228c40505004320232a23d99ebd9ef48478a/
Rule name:vmdetect
Create hunting rule
Author:nex
Description:Possibly employs anti-virtualization techniques
Rule name:WHIRLPOOL_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for WhirlPool constants

File information

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

Web download

AurotunStealer

Executable exe a8ac40da7f243063370948e3a9d1c2f6d9ff5574d313631808b57b1040e99f7b

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3622423/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/27160/

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