MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 621425400cfcefaa6e9f1bc2bbac63f8b4aa23c81c9b805098724c73e5031021. 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

Formbook

Vendor detections: 16

Intelligence 16 IOCs YARA 17 File information Comments

SHA256 hash:	621425400cfcefaa6e9f1bc2bbac63f8b4aa23c81c9b805098724c73e5031021
SHA3-384 hash:	557b2322539947c1792ce159dac6789f90adf5cd0ce5a46869928fc1b5ef6ef9bf9e9f1c166db615c1b3bce0df0dcbec
SHA1 hash:	d527266fd29c9f0d545f79873bfed283aa129d91
MD5 hash:	e7a754f4ff9e4810129115888bc35f6d
humanhash:	oranges-one-ohio-alanine
File name:	SecuriteInfo.com.TrojanLoader.MSIL.DaVinci.Heur.10101.19878
Download:	download sample
Signature	Formbook Create hunting rule
File size:	696'832 bytes
First seen:	2024-01-10 09:17:13 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'647 x AgentTesla, 19'451 x Formbook, 12'201 x SnakeKeylogger)
ssdeep	12288:2ZXrQyVhJDX29kJQIdxda7jP0jkLfiXZc4Sa7IMBTK:O0yxz3TBGT0ALwSa
Threatray	4'402 similar samples on MalwareBazaar
TLSH	T150E413B1B7DCDA11F4A9297A6E7C013BD3F1F0EBA311E30A0F16219D5CE53611925B62
TrID	71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 10.2% (.EXE) Win64 Executable (generic) (10523/12/4) 6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.3% (.EXE) Win32 Executable (generic) (4505/5/1) 2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Reporter	SecuriteInfoCom
Tags:	exe FormBook

Intelligence

File Origin

# of uploads :

# of downloads :

385

Origin country :

Vendor Threat Intelligence

Malware family:

agenttesla

ID:

File name:

evpkg_3659093.zip

Verdict:

Malicious activity

Analysis date:

2024-01-10 08:25:34 UTC

Tags:

evasion agenttesla stealer

Link:

https://app.any.run/tasks/3cb471cf-d503-440d-9fd2-b187e10c16e9

Note:

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

Detection:

AgentTeslaV2

Link:

https://www.capesandbox.com/analysis/470156/

Detection(s):

Porcupine.Malware.58887.UNOFFICIAL

SecuriteInfo.com.TrojanLoader.MSIL.DaVinci.Heur.10101.19878.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Unauthorized injection to a recently created process

Restart of the analyzed sample

Creating a file

Sending a custom TCP request

Using the Windows Management Instrumentation requests

Сreating synchronization primitives

DNS request

Sending an HTTP GET request

Reading critical registry keys

Setting a keyboard event handler

Stealing user critical data

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

packed

Link:

https://www.filescan.io/uploads/659e60cb99da41ccd7cd7cf9/reports/7ef8add3-0818-48ef-922f-f9402ae1866a/overview

Verdict:

Malicious

Labled as:

Win/malicious_confidence_100%

Link:

https://www.hybrid-analysis.com/sample/621425400cfcefaa6e9f1bc2bbac63f8b4aa23c81c9b805098724c73e5031021

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.

Malware family:

Agent Tesla

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/43669099-5576-4eec-8bec-550ab4ad488d

Result

Threat name:

AgentTesla

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1372284

Signature

.NET source code contains method to dynamically call methods (often used by packers)

.NET source code contains potential unpacker

Antivirus detection for URL or domain

Check if machine is in data center or colocation facility

Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)

Contains functionality to log keystrokes (.Net Source)

Found malware configuration

Injects a PE file into a foreign processes

Installs a global keyboard hook

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)

Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)

Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)

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

Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)

Tries to steal Mail credentials (via file / registry access)

Yara detected AgentTesla

Yara detected AntiVM3

Yara detected Generic Downloader

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/621425400cfcefaa6e9f1bc2bbac63f8b4aa23c81c9b805098724c73e5031021

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/621425400cfcefaa6e9f1bc2bbac63f8b4aa23c81c9b805098724c73e5031021/

Threat name:

ByteCode-MSIL.Spyware.Negasteal

Status:

Malicious

First seen:

2024-01-10 09:18:05 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

20 of 24 (83.33%)

Threat level:

2/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=mikckqam7tx2u3u7dpblxldd7c2kui6idsnyaueyojghhzidcaqq._file

Verdict:

malicious

Label(s):

agenttesla_v4

agenttesla

Formbook

11a43a46d53195a06afc26f259af3e7c1b7263c1da4cbf01efb35997701ba0a6

Formbook

5e7818ec5cecb70695af0642e247cdde8594621672a0b067a058b06975b327e3

Formbook

621425400cfcefaa6e9f1bc2bbac63f8b4aa23c81c9b805098724c73e5031021

Formbook

a54dc3390eaea1e86acdbc8abe74af7f4cda5f579f8ecc3182f314427fab0658

Formbook

+ 4'392 additional samples on MalwareBazaar

Result

Malware family:

agenttesla

Score:

10/10

Tags:

family:agenttesla keylogger spyware stealer trojan

Link:

https://tria.ge/reports/240110-k9lgpscegr/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Suspicious use of SetThreadContext

Looks up external IP address via web service

Reads data files stored by FTP clients

Reads user/profile data of local email clients

Reads user/profile data of web browsers

AgentTesla

Unpacked files

SH256 hash:

621425400cfcefaa6e9f1bc2bbac63f8b4aa23c81c9b805098724c73e5031021

MD5 hash:

e7a754f4ff9e4810129115888bc35f6d

SHA1 hash:

d527266fd29c9f0d545f79873bfed283aa129d91

Link:

https://www.unpac.me/results/94f4f6ec-a027-4aee-9e80-831cce79ecfc/

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/621425400cfcefaa6e9f1bc2bbac63f8b4aa23c81c9b805098724c73e5031021

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:	AgentTeslaV2 Create hunting rule
Author:	ditekshen
Description:	AgenetTesla Type 2 Keylogger payload

Rule name:	AgentTeslaV3 Create hunting rule
Author:	ditekshen
Description:	AgentTeslaV3 infostealer payload

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

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:	MALWARE_Win_AgentTeslaV2 Create hunting rule
Author:	ditekSHen
Description:	AgenetTesla Type 2 Keylogger payload

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:	Skystars_Malware_Imphash Create hunting rule
Author:	Skystars LightDefender
Description:	imphash

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/470156/

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