MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b22d450f1a3799f1c1d1ab6a655a8f9987b32d7d15b254fd586fb4aab34a9d65. 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: 13


Intelligence 13 IOCs YARA 34 File information Comments
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SHA256 hash: b22d450f1a3799f1c1d1ab6a655a8f9987b32d7d15b254fd586fb4aab34a9d65
SHA3-384 hash: 491ebe3dc7e802c1d0ba5367b25f3068a595f8514609449de4addad88b6c936fbb24c52041cef0ede75bbf4ee97caa08
SHA1 hash: 056103b2a1ebb72ebcab517d013e302f920f7c03
MD5 hash: 818967462272da44245ed5d4f524b278
humanhash: mockingbird-wisconsin-jig-cola
File name:Prosaf-naročilo20-08-025_PDF.vbs
Download: download sample
Signature RemcosRAT
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File size:835'448 bytes
First seen:2025-08-26 14:19:21 UTC
Last seen:Never
File type:Visual Basic Script (vbs) vbs
MIME type:text/plain
ssdeep 12288:3uBIC0uJ11A0O2Xrw2OSjATG2aSk2nZJk4psJj8YcDknkIgiqvDXSWBFu2sj1+J0:eZPrA7MrASXj8YdAiqvD2
Threatray 1'362 similar samples on MalwareBazaar
TLSH T12C05E13DCFA4FDC8173B70D2919E3B01215C6B93BA650F5CF5D849BA0E2494AABB605C
Magika vba
Reporter abuse_ch
Tags:RAT RemcosRAT vbs

Intelligence

File Origin
# of uploads :
1
# of downloads :
64
Origin country :
SE SE
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/23674/
Detection(s):
SecuriteInfo.com.BAT.Obfus-5.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68adc2afeb163e0ec182c954
Tags:
autorun lien
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
base64 evasive masquerade obfuscated powershell
Link:
https://www.filescan.io/uploads/68adc2a74a87ed79676c6249/reports/150a6242-09b5-40bc-9c56-ff708cbc2fae/overview
Verdict:
Suspicious
Labled as:
Trojan/BAT.Agent
Link:
https://www.hybrid-analysis.com/sample/b22d450f1a3799f1c1d1ab6a655a8f9987b32d7d15b254fd586fb4aab34a9d65
Verdict:
Malicious
File Type:
text
First seen:
2025-08-26T09:48:00Z UTC
Last seen:
2025-08-26T09:48:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/b22d450f1a3799f1c1d1ab6a655a8f9987b32d7d15b254fd586fb4aab34a9d65/results?tab=lookup
Result
Threat name:
n/a
Detection:
malicious
Classification:
expl.evad
Score:
92 / 100
Link:
https://www.joesandbox.com/analysis/1765459
Signature
Creates processes via WMI
Found suspicious powershell code related to unpacking or dynamic code loading
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: PowerShell Base64 Encoded IEX Cmdlet
Sigma detected: WScript or CScript Dropper
Suspicious execution chain found
Suspicious powershell command line found
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Wscript starts Powershell (via cmd or directly)
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1765459 Sample: Prosaf-naro#U010dilo20-08-0... Startdate: 26/08/2025 Architecture: WINDOWS Score: 92 39 Malicious sample detected (through community Yara rule) 2->39 41 Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet 2->41 43 Sigma detected: WScript or CScript Dropper 2->43 45 3 other signatures 2->45 9 wscript.exe 1 2->9         started        13 svchost.exe 1 1 2->13         started        process3 dnsIp4 31 C:\Windows\Temp\FenceBuilding7450.bat, ASCII 9->31 dropped 51 Wscript starts Powershell (via cmd or directly) 9->51 53 Windows Scripting host queries suspicious COM object (likely to drop second stage) 9->53 55 Suspicious execution chain found 9->55 57 Creates processes via WMI 9->57 16 cmd.exe 1 9->16         started        33 127.0.0.1 unknown unknown 13->33 file5 signatures6 process7 signatures8 35 Suspicious powershell command line found 16->35 37 Wscript starts Powershell (via cmd or directly) 16->37 19 cmd.exe 1 16->19         started        21 conhost.exe 16->21         started        process9 process10 23 cmd.exe 1 19->23         started        signatures11 47 Suspicious powershell command line found 23->47 49 Wscript starts Powershell (via cmd or directly) 23->49 26 powershell.exe 17 23->26         started        29 conhost.exe 23->29         started        process12 signatures13 59 Found suspicious powershell code related to unpacking or dynamic code loading 26->59
Score:
99%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/b22d450f1a3799f1c1d1ab6a655a8f9987b32d7d15b254fd586fb4aab34a9d65
Verdict:
Malware
YARA:
1 match(es)
Tags:
Base64 Block Contains Base64 Block DeObfuscated PowerShell
Link:
https://app.malva.re/file/818967462272da44245ed5d4f524b278
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b22d450f1a3799f1c1d1ab6a655a8f9987b32d7d15b254fd586fb4aab34a9d65/
Verdict:
Malicious
Threat:
Family.DONUTLOADER
Link:
https://tip.neiki.dev/file/b22d450f1a3799f1c1d1ab6a655a8f9987b32d7d15b254fd586fb4aab34a9d65
Threat name:
Win32.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2025-08-26 14:23:19 UTC
File Type:
Text
AV detection:
5 of 24 (20.83%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=wiwukdy2g6m7dqorvnvgkwuptgd3gll5cwzfj7kyn62kvm2ktvsq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
donut_injector
Create hunting rule
Similar samples:
006e397147d8545c57b503ba8a0981bae2dfb21e36fe13a76761644caeb3b596
RemcosRAT
2d0f39d696f56871af658067664d2bd79b77928ba7b289393b9f7e75ac85e321
RemcosRAT
5ef13adb1cacef97a48246a5b92634225f332e24c22e11ec7f3161d49595fa5f
RemcosRAT
8d2eb5b60fb361710d037ecad9395553bd1bfe06eda18c71c6fdd0317b0601d9
RemcosRAT
8ed39975fb97ec9dc4e4e39d96e1af7d500f5a7923b6a4cdcd446aa731e9c834
RemcosRAT
8f1b4058ea33988e80e1ca765d6054045b5da575b7678b7e79afb9957128760b
RemcosRAT
bfaaf672b1741b950b48b3f2296d79bf38c18bc8f14fd1b38905721299811386
RemcosRAT
ccf51177e35672532087c0035850fa3c3842a99d39f0d93275f9cf383534fe78
RemcosRAT
d50825f42162126cafad375cfe5995b2a0b632a5238ed9b66d929613e2ec7020
RemcosRAT
e1a0ab5cadb0af718230bb8f907c649a313f1ff7bcbed6745c678811ce8a4465
RemcosRAT
error
RemcosRAT
+ 1'352 additional samples on MalwareBazaar
Result
Malware family:
donutloader
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Score:
  10/10
Tags:
family:donutloader collection defense_evasion discovery execution loader
Link:
https://tria.ge/reports/250826-rnjvbagq4v/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Command and Scripting Interpreter: PowerShell
Drops startup file
Badlisted process makes network request
Modifies trusted root certificate store through registry
Detected Nirsoft tools
NirSoft MailPassView
NirSoft WebBrowserPassView
Detects DonutLoader
DonutLoader
Donutloader family
Process spawned unexpected child process
Please note that we are no longer able to provide a coverage score for Virus Total.

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: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:ClamAV_Emotet_String_Aggregate
Create hunting rule
Rule name:cobalt_strike_tmp01925d3f
Create hunting rule
Author:The DFIR Report
Description:files - file ~tmp01925d3f.exe
Reference:https://thedfirreport.com
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:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:Disable_Defender
Create hunting rule
Author:iam-py-test
Description:Detect files disabling or modifying Windows Defender, Windows Firewall, or Microsoft Smartscreen
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_EXE_Packed_MPress
Create hunting rule
Author:ditekSHen
Description:Detects executables built or packed with MPress PE compressor
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:pe_detect_tls_callbacks
Create hunting rule
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:remcos_
Create hunting rule
Author:Michelle Khalil
Description:This rule detects unpacked remcos malware samples.
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:Remcos_unpacked_PulseIntel
Create hunting rule
Author:PulseIntel
Description:Remcos Payload
Rule name:SUSP_PS1_JAB_Pattern_Jun22_1
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects suspicious UTF16 and Base64 encoded PowerShell code that starts with a $ sign and a single char variable
Reference:Internal Research
Rule name:Sus_CMD_Powershell_Usage
Create hunting rule
Author:XiAnzheng
Description:May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)
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:TeslaCryptPackedMalware
Create hunting rule
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.

Cape
Cape
https://www.capesandbox.com/analysis/23674/

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