MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ec3ca0877e599ae9c40cbcec51a9a4718114e33d9e2d9d8c72f5f24d7cebdcbf. 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

BruteRatel

Vendor detections: 12

Intelligence 12 IOCs YARA 16 File information Comments 2

SHA256 hash:	ec3ca0877e599ae9c40cbcec51a9a4718114e33d9e2d9d8c72f5f24d7cebdcbf
SHA3-384 hash:	6238be4f14c3aebb2acf7c40e81847cca68900d4e47a9064ec05b2c1fdf1a06ee5c4861d55c0660e36b9d758078d4a32
SHA1 hash:	f679bb77e2876b17da2276017df6cf252aa5bd22
MD5 hash:	27708977fc83f3b70177d6cf68900eba
humanhash:	oklahoma-quebec-utah-social
File name:	calma.msi
Download:	download sample
Signature	BruteRatel Create hunting rule
File size:	4'772'352 bytes
First seen:	2025-02-20 17:43:58 UTC
Last seen:	Never
File type:	msi
MIME type:	application/x-msi
ssdeep	98304:HYVK/AKIN29ryVzg+Vho+5d67amiFP/0hnJRZuq2sDSq5Fwfp:G29W5jmih/0xXLFm
TLSH	T1F02612227386C63BC96E06703929869F0179FDA74B7080DBA3D8292E5CB45C16739F67
TrID	80.0% (.MSI) Microsoft Windows Installer (454500/1/170) 10.7% (.MST) Windows SDK Setup Transform script (61000/1/5) 7.8% (.MSP) Windows Installer Patch (44509/10/5) 1.4% (.) Generic OLE2 / Multistream Compound (8000/1)
Magika	msi
Reporter	k3dg3___
Tags:	BruteRatel BruteRatelC4 Latrodectus msi signed

Code Signing Certificate

Organisation:	LLC CESARIA
Issuer:	GlobalSign GCC R45 EV CodeSigning CA 2020
Algorithm:	sha256WithRSAEncryption
Valid from:	2024-05-31T10:10:49Z
Valid to:	2025-06-01T10:10:49Z
Serial number:	1842364451d5932004e163c7
Intelligence:	2 malware samples on MalwareBazaar are signed with this code signing certificate
Cert Graveyard Blocklist:	This certificate is on the Cert Graveyard blocklist
Thumbprint Algorithm:	SHA256
Thumbprint:	538d365cf5fa088f5ec75d0b36282cf340785b8bbafd562aff41a585a1ffe710
Source:	This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin

# of uploads :

# of downloads :

110

Origin country :

Vendor Threat Intelligence

Detection(s):

SecuriteInfo.com.Win64.MalwareX-gen.21350.29107.UNOFFICIAL

Verdict:

Suspicious

Score:

50%

Link:

https://cyber-fortress.com/docs/result/index.php?id=67b76b59a0fd713c335c1621

Tags:

shellcode

Verdict:

Suspicious

Threat level:

5/10

Confidence:

100%

Tags:

adaptive-context anti-vm cmd crypto fingerprint invalid-signature keylogger lolbin obfuscated remote revoked-cert signed wix

Link:

https://www.filescan.io/uploads/67b77833681e3f7102c9da1f/reports/a40fc76f-788a-474f-aec5-1200ed92f4e6/overview

Verdict:

Suspicious

Labled as:

Trojan.U.Generic

Link:

https://www.hybrid-analysis.com/sample/ec3ca0877e599ae9c40cbcec51a9a4718114e33d9e2d9d8c72f5f24d7cebdcbf

Result

Threat name:

BruteRatel, Latrodectus

Detection:

malicious

Classification:

troj.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1620197

Signature

Allocates memory in foreign processes

Antivirus detection for URL or domain

C2 URLs / IPs found in malware configuration

Contains functionality to inject threads in other processes

Creates a thread in another existing process (thread injection)

Found direct / indirect Syscall (likely to bypass EDR)

Found malware configuration

Injects a PE file into a foreign processes

Injects code into the Windows Explorer (explorer.exe)

Joe Sandbox ML detected suspicious sample

Malicious sample detected (through community Yara rule)

Modifies the context of a thread in another process (thread injection)

Multi AV Scanner detection for submitted file

Sample uses string decryption to hide its real strings

Sets debug register (to hijack the execution of another thread)

Suricata IDS alerts for network traffic

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

Writes to foreign memory regions

Yara detected BruteRatel

Yara detected Latrodectus

Behaviour

Behavior Graph:

Download SVG

Score:

50%

Verdict:

Susipicious

File Type:

Result

Malware family:

latrodectus

Score:

10/10

Tags:

family:bruteratel family:latrodectus backdoor discovery loader persistence privilege_escalation

Link:

https://tria.ge/reports/250220-wa65xa1lft/

Behaviour

Checks SCSI registry key(s)

Modifies data under HKEY_USERS

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of WriteProcessMemory

Uses Volume Shadow Copy service COM API

Event Triggered Execution: Installer Packages

System Location Discovery: System Language Discovery

Drops file in Windows directory

Executes dropped EXE

Loads dropped DLL

Blocklisted process makes network request

Enumerates connected drives

Brute Ratel C4

Bruteratel family

Detect BruteRatel badger

Detects Latrodectus

Latrodectus family

Latrodectus loader

Malware Config

C2 Extraction:

https://tynifinilam.com/test/
https://horetimodual.com/test/

Verdict:

Suspicious

Tags:

n/a

YARA:

n/a

Link:

https://app.threat.zone/submission/2497a4b0-a7e4-4197-ada3-02d7d6006a8f

Malware family:

BruteRatel

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/ec3ca0877e59/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/ec3ca0877e599ae9c40cbcec51a9a4718114e33d9e2d9d8c72f5f24d7cebdcbf

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:	BruteRatel Create hunting rule
Author:	kevoreilly
Description:	BruteRatel Payload

Rule name:	Check_OutputDebugStringA_iat Create hunting rule

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

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

Rule name:	Detect_LATAM_MSI_Banker Create hunting rule

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

Rule name:	PEzor_x64_Release Create hunting rule
Author:	Still
Description:	attempts to match the PEzor packer (release; x64)

Rule name:	pe_detect_tls_callbacks Create hunting rule

Rule name:	Suspicious_Latam_MSI_and_ZIP_Files Create hunting rule
Author:	eremit4, P4nd3m1cb0y
Description:	Detects suspicious .msi and .zip files used in Latam banking trojan campaigns.

Rule name:	suspicious_msi_file Create hunting rule
Author:	Johnk3r
Description:	Detects common strings, DLL and API in Banker_BR

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_BruteRatel_4110d879 Create hunting rule
Author:	Elastic Security

Rule name:	Windows_Trojan_BruteRatel_5b12cbab Create hunting rule
Author:	Elastic Security

Rule name:	Windows_Trojan_BruteRatel_644ac114 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.

BruteRatel

msi ec3ca0877e599ae9c40cbcec51a9a4718114e33d9e2d9d8c72f5f24d7cebdcbf

(this sample)

6c94c9d7e231523e06b41275ab208e42cdd39278f341123b066b05a0a6830e4d

Dropping

SHA256 6c94c9d7e231523e06b41275ab208e42cdd39278f341123b066b05a0a6830e4d

Delivery method

Distributed via e-mail link

Comments

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Kelsey commented on 2025-02-20 17:49:11 UTC

from 2025-02-19 campaign

Kelsey commented on 2025-02-20 17:48:49 UTC

probs wrong filename, just fyi