MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b43ca133d57448c7afb42bffcb1ce756cdad70308d3f49c9c981fac24c55e76f. 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


RemcosRAT


Vendor detections: 20


Intelligence 20 IOCs YARA 26 File information Comments
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SHA256 hash: b43ca133d57448c7afb42bffcb1ce756cdad70308d3f49c9c981fac24c55e76f
SHA3-384 hash: 4d263d3b80677e9f3756499b3be9804baedd044cd428ffc131096f4bc11f94f58a32b653f9d09476b7277a057794d486
SHA1 hash: 1a1ce9b83de9d2e967a539aabeafdab36dbb626a
MD5 hash: a2800b58845d5f108333e9f7f9c388dd
humanhash: don-oven-batman-triple
File name:RFQ-20241230.pif
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:987'699 bytes
First seen:2025-01-09 18:01:35 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'609 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 24576:FzrqD+VnGOgUL+oMIk2W/PpOlL46TFJtV:BqyVnCUaLnZONbTFJX
TLSH T1592512582B4EE413C56557B51A70F5F41B6D6EDEA801D313AFE86EFBB962E102C08383
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10522/11/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4504/4/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Magika pebin
File icon (PE):PE icon
dhash icon 70b269e8cccccc28 (2 x RemcosRAT, 1 x Expiro, 1 x Formbook)
Reporter lowmal3
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
462
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
RFQ-20241230.pif
Verdict:
Malicious activity
Analysis date:
2025-01-09 18:06:56 UTC
Tags:
remcos rat
Link:
https://app.any.run/tasks/7d53f198-e93e-4b6f-948f-fac67af06f0e

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Win.Packed.Crypterx-10041271-0
Create hunting rule

Verdict:
Malicious
Score:
94.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67801037ffdcee13ec88f78c
Tags:
dropper micro shell
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Сreating synchronization primitives
Creating a process with a hidden window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Connection attempt
Adding an exclusion to Microsoft Defender
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
masquerade obfuscated obfuscated overlay packed packed packer_detected phishing vbnet
Link:
https://www.filescan.io/uploads/67800f99fa78df32ded91f19/reports/0fc19fbd-f203-4494-aa23-bb4be317103f/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/b43ca133d57448c7afb42bffcb1ce756cdad70308d3f49c9c981fac24c55e76f
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:
REMCOS
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/1221364a-0400-42d0-bd51-a64ad265bdd5
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1586923
Signature
Adds a directory exclusion to Windows Defender
AI detected suspicious sample
Antivirus / Scanner detection for submitted sample
C2 URLs / IPs found in malware configuration
Contains functionality to bypass UAC (CMSTPLUA)
Contains functionality to register a low level keyboard hook
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Contains functionalty to change the wallpaper
Delayed program exit found
Detected Remcos RAT
Found malware configuration
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Loading BitLocker PowerShell Module
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Remcos
Suricata IDS alerts for network traffic
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b43ca133d57448c7afb42bffcb1ce756cdad70308d3f49c9c981fac24c55e76f
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b43ca133d57448c7afb42bffcb1ce756cdad70308d3f49c9c981fac24c55e76f/
Threat name:
ByteCode-MSIL.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2025-01-09 18:02:04 UTC
File Type:
PE (.Net Exe)
Extracted files:
7
AV detection:
29 of 38 (76.32%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wq6kcm6vorempl5ufp74whhhk3g224bqru7utsojqh5metcv45xq._file
Verdict:
malicious
Label(s):
remcos
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unknown_loader_037
Create hunting rule
Similar samples:
error
RemcosRAT
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remcohost discovery execution rat
Link:
https://tria.ge/reports/250109-wme7yswpdw/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Checks computer location settings
Command and Scripting Interpreter: PowerShell
Remcos
Remcos family
Malware Config
C2 Extraction:
173.211.106.233:2404
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/050ae844-dfde-490f-9d80-f51b8bc63cc4
Unpacked files
SH256 hash:
0d0e5965401031b775ed039981019dcf078e943ad13a7faec6b5783f8834086f
MD5 hash:
b7c1e11b3b0c12ce2075b4426aefdfa8
SHA1 hash:
f7e82e0db5311e9f96a3767a2e43a30100a33b20
Detections:
Remcos
Create hunting rule
win_remcos_auto
Create hunting rule
win_remcos_w0
Create hunting rule
malware_windows_remcos_rat
Create hunting rule
win_remcos_rat_unpacked
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
Create hunting rule
Link:
https://www.unpac.me/results/cc8b904f-51a0-498f-a76b-719d2d3343b8/
Parent samples :
9516599f449a283c1863a45d1c95433aa769fd86d49058ca861e37a1f758831d
b43ca133d57448c7afb42bffcb1ce756cdad70308d3f49c9c981fac24c55e76f
SH256 hash:
9c809c741033210da885c965e8834516b3f6bf951ef43f147fef38fbc0594c6a
MD5 hash:
d60acb1c44fbad69cd141536671132ee
SHA1 hash:
6e2b7bc3a1d5f8283d8e402a736ad5bd8510618d
Link:
https://www.unpac.me/results/cc8b904f-51a0-498f-a76b-719d2d3343b8/
SH256 hash:
309c874c77ba43e61428a377c726807b5dc71000990dd1273001624488a00592
MD5 hash:
8b972bf9240021f7b888354911c10b3f
SHA1 hash:
5d3e50455b20b6c61ca9e39306a7df4045ee96ec
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/cc8b904f-51a0-498f-a76b-719d2d3343b8/
SH256 hash:
b43ca133d57448c7afb42bffcb1ce756cdad70308d3f49c9c981fac24c55e76f
MD5 hash:
a2800b58845d5f108333e9f7f9c388dd
SHA1 hash:
1a1ce9b83de9d2e967a539aabeafdab36dbb626a
Link:
https://www.unpac.me/results/cc8b904f-51a0-498f-a76b-719d2d3343b8/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b43ca133d574/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/b43ca133d57448c7afb42bffcb1ce756cdad70308d3f49c9c981fac24c55e76f

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:cobalt_strike_tmp01925d3f
Create hunting rule
Author:The DFIR Report
Description:files - file ~tmp01925d3f.exe
Reference:https://thedfirreport.com
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:iexplorer_remcos
Create hunting rule
Author:iam-py-test
Description:Detect iexplorer being taken over by Remcos
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
Create hunting rule
Author:ditekSHen
Description:Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)
Rule name:lsi_remcos
Create hunting rule
Author:anonym
Description:Remcos_V5 Payload
Rule name:lsi_remcos2
Create hunting rule
Author:anonym
Description:Remcos_V5 Payload
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:pe_imphash
Create hunting rule
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:Remcos_unpacked_PulseIntel
Create hunting rule
Author:PulseIntel
Description:Remcos Payload
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
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:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Windows_Trojan_Remcos_b296e965
Create hunting rule
Author:Elastic Security
Reference:https://www.elastic.co/security-labs/exploring-the-ref2731-intrusion-set
Rule name:win_remcos_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.remcos.
Rule name:win_remcos_rat_unpacked
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:win_remcos_w0
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:yarahub_win_remcos_rat_unpacked_aug_2023
Create hunting rule
Author:Matthew @ Embee_Research

File information

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

Malspam

RemcosRAT

Executable exe b43ca133d57448c7afb42bffcb1ce756cdad70308d3f49c9c981fac24c55e76f

(this sample)

  
Delivery method
Distributed via e-mail attachment

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (GUARD_CF)high

Comments