MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b21399e4283631c68a3e60d3f826df09815e8bbb50e1790b8266bad03f9b5b7d. 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

a310Logger

Vendor detections: 19

Intelligence 19 IOCs YARA 24 File information Comments

SHA256 hash:	b21399e4283631c68a3e60d3f826df09815e8bbb50e1790b8266bad03f9b5b7d
SHA3-384 hash:	9bff715a7c5114558301d9f39687cae0ba5af77dc587488f2501e4f9deb9944adfff7f94ab1bc2618219023d8c9848ef
SHA1 hash:	af89b78a28a7d9f66d5ca8768c4af03061a3b4a9
MD5 hash:	cefc4ee7d09b3b98d086064abf2cf84e
humanhash:	double-avocado-connecticut-aspen
File name:	Comprobante de pago (BBVA).exe
Download:	download sample
Signature	a310Logger Create hunting rule
File size:	1'176'576 bytes
First seen:	2025-09-18 06:45:04 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	1895460fffad9475fda0c84755ecfee1 (307 x Formbook, 52 x AgentTesla, 36 x SnakeKeylogger)
ssdeep	24576:t5EmXFtKaL4/oFe5T9yyXYfP1ijXdailGo/Uz0t2dkLBUiIpuQtb:tPVt/LZeJbInQRaisiUAVBI
Threatray	599 similar samples on MalwareBazaar
TLSH	T10745BF0273D1D062FFAB92334B5AF6115BBC79260123A61F13981DB9BE701B1563E7A3
TrID	40.3% (.EXE) Win64 Executable (generic) (10522/11/4) 19.3% (.EXE) Win16 NE executable (generic) (5038/12/1) 17.2% (.EXE) Win32 Executable (generic) (4504/4/1) 7.7% (.EXE) OS/2 Executable (generic) (2029/13) 7.6% (.EXE) Generic Win/DOS Executable (2002/3)
Magika	pebin
Reporter	abuse_ch
Tags:	a310logger BBVA DarkCloud exe

Intelligence

File Origin

# of uploads :

# of downloads :

116

Origin country :

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

Comprobante de pago (BBVA).exe

Verdict:

No threats detected

Analysis date:

2025-09-17 17:36:22 UTC

Tags:

n/a

Link:

https://app.any.run/tasks/c23c3fbd-7b8a-4a6e-b916-43d2630ce238

Note:

ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample

Detection:

A310Logger

Link:

https://www.capesandbox.com/analysis/28087/

Verdict:

Malicious

Score:

96.5%

Link:

https://cyber-fortress.com/docs/result/index.php?id=68cbaad488b954439247a3d4

Tags:

autoit emotet

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Creating a file in the %temp% directory

Launching a process

Сreating synchronization primitives

Using the Windows Management Instrumentation requests

Creating a file in the %AppData% subdirectories

Reading critical registry keys

DNS request

Connection attempt

Sending a custom TCP request

Stealing user critical data

Unauthorized injection to a system process

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

adaptive-context autoit compiled-script fingerprint keylogger lolbin microsoft_visual_cc mmc obfuscated packed packed packer_detected threat

Link:

https://www.filescan.io/uploads/68cbac3fdbc6f5a29c4b493b/reports/2a385352-be2a-40e0-8592-b28111cec47d/overview

Verdict:

Malicious

Labled as:

Win/malicious_confidence_90%

Link:

https://www.hybrid-analysis.com/sample/b21399e4283631c68a3e60d3f826df09815e8bbb50e1790b8266bad03f9b5b7d

Verdict:

Malicious

File Type:

exe x32

First seen:

2025-09-16T13:06:00Z UTC

Last seen:

2025-09-16T13:06:00Z UTC

Hits:

~100

Link:

https://opentip.kaspersky.com/b21399e4283631c68a3e60d3f826df09815e8bbb50e1790b8266bad03f9b5b7d/results?tab=lookup

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/013914d0-d9f1-4d56-b2e6-810e425de13a

Result

Threat name:

DarkCloud

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1779790

Signature

Binary is likely a compiled AutoIt script file

Found API chain indicative of sandbox detection

Found malware configuration

Joe Sandbox ML detected suspicious sample

Malicious sample detected (through community Yara rule)

Maps a DLL or memory area into another process

Multi AV Scanner detection for submitted file

Queries sensitive service information (via WMI, Win32_LogicalDisk, often done to detect sandboxes)

Switches to a custom stack to bypass stack traces

System process connects to network (likely due to code injection or exploit)

Tries to harvest and steal browser information (history, passwords, etc)

Writes to foreign memory regions

Yara detected DarkCloud

Yara detected Generic Dropper

Yara detected Telegram RAT

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/b21399e4283631c68a3e60d3f826df09815e8bbb50e1790b8266bad03f9b5b7d

Verdict:

Malware

YARA:

7 match(es)

Tags:

AutoIt Decompiled Executable PDB Path PE (Portable Executable) PE File Layout Suspect Win 32 Exe x86

Link:

https://app.malva.re/file/cefc4ee7d09b3b98d086064abf2cf84e

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/b21399e4283631c68a3e60d3f826df09815e8bbb50e1790b8266bad03f9b5b7d/

Threat name:

Win32.Trojan.AutoitInject

Status:

Malicious

First seen:

2025-09-17 02:34:58 UTC

File Type:

PE (Exe)

Extracted files:

AV detection:

25 of 38 (65.79%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=wijztzbigyy4ncr6mdj7qjw7bgav5c53kdqxsc4cm25nap43ln6q._file

Verdict:

malicious

Label(s):

darkcloudstealer

a310Logger

75c3b61d489134e5295adf75aa0cb6aa6fd479d412e023666153c75bea9eaa1b

a310Logger

81aaa4374132fce34696a55cac25f3ab2fcca844500f88d13e4f217cde9349ec

a310Logger

a89e4904dda9cbb86124d8479fe68113e9b927626a902f185d1c9f76cc9144d6

a310Logger

f1be8acbb066d665acd6f4811ecccd4bfb2985ec05b793ba41866c9430c8abf9

a310Logger

+ 589 additional samples on MalwareBazaar

Result

Malware family:

darkcloud

Score:

10/10

Tags:

family:darkcloud discovery stealer

Link:

https://tria.ge/reports/250918-hneqxsbq81/

Behaviour

Suspicious behavior: MapViewOfSection

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

System Location Discovery: System Language Discovery

Suspicious use of SetThreadContext

DarkCloud

Darkcloud family

Verdict:

Malicious

Tags:

n/a

YARA:

n/a

Link:

https://app.threat.zone/submission/aa36189e-d6f5-4f60-a2f7-bdc5bd3910d0

Unpacked files

SH256 hash:

b21399e4283631c68a3e60d3f826df09815e8bbb50e1790b8266bad03f9b5b7d

MD5 hash:

cefc4ee7d09b3b98d086064abf2cf84e

SHA1 hash:

af89b78a28a7d9f66d5ca8768c4af03061a3b4a9

Link:

https://www.unpac.me/results/4bfb523b-382c-49a0-896b-6b3af56729e2/

SH256 hash:

206022f6a98ffd3ed53150cfb297bf2c7b59b5da1fbb9080734b6621128dc29f

MD5 hash:

c2ba0f62557fd0ca15520998c95622ae

SHA1 hash:

c057a6dfa82aaff8c8d3e0231951748e34f9d64d

Detections:

darkcloudstealer

INDICATOR_SUSPICIOUS_Binary_References_Browsers

INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store

INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients

INDICATOR_SUSPICIOUS_EXE_SQLQuery_ConfidentialDataStore

INDICATOR_SUSPICIOUS_EXE_TelegramChatBot

INDICATOR_SUSPICIOUS_EXE_CC_Regex

MALWARE_Win_A310Logger

MALWARE_Win_DarkCloud

Link:

https://www.unpac.me/results/4bfb523b-382c-49a0-896b-6b3af56729e2/

Parent samples :

81aaa4374132fce34696a55cac25f3ab2fcca844500f88d13e4f217cde9349ec
f152904e5d22122a4ccaa29fb03fbaf06fe030b319ee4fa6d10c30ad895b18c8
e46c9489a12a2b616ffe154da4fa43457a61c70442332b8642fde73a69f22fdd
1aa8a0d186840fc2a6cf512d3064808b6ad405a12479842e93169bf479a0dc33
b21399e4283631c68a3e60d3f826df09815e8bbb50e1790b8266bad03f9b5b7d

Malware family:

DarkCloud

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/b21399e42836/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/b21399e4283631c68a3e60d3f826df09815e8bbb50e1790b8266bad03f9b5b7d

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:	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:	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:	darkcloud_stealer Create hunting rule
Author:	Michelle Khalil
Description:	This rule detects unpacked darkcloud malware samples.

Rule name:	DebuggerCheck__API 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:	FreddyBearDropper Create hunting rule
Author:	Dwarozh Hoshiar
Description:	Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.

Rule name:	golang_bin_JCorn_CSC846 Create hunting rule
Author:	Justin Cornwell
Description:	CSC-846 Golang detection ruleset

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_CC_Regex Create hunting rule
Author:	ditekSHen
Description:	Detects executables referencing credit card regular expressions

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_SQLQuery_ConfidentialDataStore Create hunting rule
Author:	ditekSHen
Description:	Detects executables containing SQL queries to confidential data stores. Observed in infostealers

Rule name:	INDICATOR_SUSPICIOUS_EXE_TelegramChatBot Create hunting rule
Author:	ditekSHen
Description:	Detects executables using Telegram Chat Bot

Rule name:	MALWARE_Win_A310Logger Create hunting rule
Author:	ditekSHen
Description:	Detects A310Logger

Rule name:	MALWARE_Win_DarkCloud Create hunting rule
Author:	ditekSHen
Description:	Detects DarkCloud infostealer

Rule name:	pe_detect_tls_callbacks Create hunting rule

Rule name:	ProtectSharewareV11eCompservCMS Create hunting rule
Author:	malware-lu

Rule name:	RIPEMD160_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for RIPEMD-160 constants

Rule name:	SEH__vba Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	SHA1_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for SHA1 constants

Rule name:	telegram_bot_api Create hunting rule
Author:	rectifyq
Description:	Detects file containing Telegram Bot API

Rule name:	TH_Generic_MassHunt_Win_Malware_2025_CYFARE Create hunting rule
Author:	CYFARE
Description:	Generic Windows malware mass-hunt rule - 2025
Reference:	https://cyfare.net/

Rule name:	Windows_Trojan_DarkCloud_9905abce Create hunting rule
Author:	Elastic Security

File information

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

Cape

https://www.capesandbox.com/analysis/28087/

Comments

Login required

You need to login to in order to write a comment. Login with your abuse.ch account.

No comments found for this malware sample