MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 02ab7fc405e543c9f72c21ce363aa9764f2ac2dbec7f4bd179f83cc89ada6e49. 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: 11


Intelligence 11 IOCs YARA File information Comments

SHA256 hash: 02ab7fc405e543c9f72c21ce363aa9764f2ac2dbec7f4bd179f83cc89ada6e49
SHA3-384 hash: 86c73e0b40f41492e6f599565e8f046b32e5f496cae88546ceb1c1d48544ba41638bd9e70e7a8fbba4859c2464e3c8cb
SHA1 hash: 923f957a20edc939e6cc587e9be359b8827f725a
MD5 hash: cb9e66e61c48a53c844ea16660241d6f
humanhash: leopard-uniform-lake-batman
File name:efreebirdflyingalways.hta
Download: download sample
Signature RemcosRAT
File size:17'210 bytes
First seen:2025-02-26 18:53:41 UTC
Last seen:Never
File type:HTML Application (hta) hta
MIME type:text/html
ssdeep 48:34VEBziqbiIEBziMsenoTrWWj99DdAPD6IMR+LQpu4ffZyEBziBkvPG:fBQBX6rjfkGlBz+
TLSH T19F72425D3C06EC15834AE8F935EC67C068EE737E80A43901B76EA02A07D9A2C5CE9353
Magika html
Reporter abuse_ch
Tags:hta RemcosRAT

Intelligence


File Origin
# of uploads :
1
# of downloads :
79
Origin country :
DE DE
Vendor Threat Intelligence
Verdict:
Malicious
Score:
92.5%
Tags:
obfuscate shell sage
Result
Verdict:
Malicious
File Type:
HTA File - Malicious
Payload URLs
URL
File name
http://198.12.81.109/230/csoss.exe
HTA File
Behaviour
BlacklistAPI detected
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
powershell
Result
Verdict:
MALICIOUS
Details
Base64 Encoded URL
Detected an ANSI or UNICODE http:// or https:// base64 encoded URL prefix.
Result
Threat name:
Cobalt Strike
Detection:
malicious
Classification:
expl.evad
Score:
100 / 100
Signature
Detected Cobalt Strike Beacon
Found evasive API chain checking for user administrative privileges
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Multi AV Scanner detection for submitted file
PowerShell case anomaly found
Powershell drops PE file
Sigma detected: Dot net compiler compiles file from suspicious location
Sigma detected: Suspicious MSHTA Child Process
Suricata IDS alerts for network traffic
Suspicious command line found
Suspicious powershell command line found
Yara detected Powershell decode and execute
Behaviour
Behavior Graph:
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1625110 Sample: efreebirdflyingalways.hta Startdate: 26/02/2025 Architecture: WINDOWS Score: 100 63 Suricata IDS alerts for network traffic 2->63 65 Multi AV Scanner detection for submitted file 2->65 67 Yara detected Powershell decode and execute 2->67 69 4 other signatures 2->69 9 mshta.exe 1 2->9         started        process3 signatures4 73 Suspicious command line found 9->73 75 PowerShell case anomaly found 9->75 12 cmd.exe 1 9->12         started        process5 signatures6 77 Detected Cobalt Strike Beacon 12->77 79 Suspicious powershell command line found 12->79 81 PowerShell case anomaly found 12->81 15 powershell.exe 45 12->15         started        20 conhost.exe 12->20         started        process7 dnsIp8 57 198.12.81.109, 49704, 80 AS-COLOCROSSINGUS United States 15->57 33 C:\Users\user\AppData\Roaming\csoss.exe, PE32 15->33 dropped 35 C:\Users\user\AppData\Local\...\csoss[1].exe, PE32 15->35 dropped 37 C:\Users\user\AppData\...\aoehiyir.cmdline, Unicode 15->37 dropped 59 Loading BitLocker PowerShell Module 15->59 61 Powershell drops PE file 15->61 22 csoss.exe 74 15->22         started        26 csc.exe 3 15->26         started        file9 signatures10 process11 file12 39 C:\Program Files (x86)\...behaviorgraphoogleUpdate.exe, PE32 22->39 dropped 41 C:\Program Files (x86)\...\psuser_64.dll, PE32+ 22->41 dropped 43 C:\Program Files (x86)behaviorgraphoogle\...\psuser.dll, PE32 22->43 dropped 47 65 other files (none is malicious) 22->47 dropped 71 Found evasive API chain checking for user administrative privileges 22->71 28 GoogleUpdate.exe 7 73 22->28         started        45 C:\Users\user\AppData\Local\...\aoehiyir.dll, PE32 26->45 dropped 31 cvtres.exe 1 26->31         started        signatures13 process14 file15 49 C:\Program Files (x86)\...behaviorgraphoogleUpdate.exe, PE32 28->49 dropped 51 C:\Program Files (x86)\...\psuser_64.dll, PE32+ 28->51 dropped 53 C:\Program Files (x86)behaviorgraphoogle\...\psuser.dll, PE32 28->53 dropped 55 66 other files (none is malicious) 28->55 dropped
Threat name:
Script-WScript.Trojan.Asthma
Status:
Malicious
First seen:
2025-02-26 10:28:35 UTC
File Type:
Text (HTML)
Extracted files:
1
AV detection:
9 of 24 (37.50%)
Threat level:
  5/5
Result
Malware family:
n/a
Score:
  8/10
Tags:
defense_evasion discovery execution persistence privilege_escalation spyware stealer
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies data under HKEY_USERS
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Browser Information Discovery
Enumerates physical storage devices
System Location Discovery: System Language Discovery
System Network Configuration Discovery: Internet Connection Discovery
Drops file in Program Files directory
Checks system information in the registry
Checks installed software on the system
Checks computer location settings
Event Triggered Execution: Component Object Model Hijacking
Executes dropped EXE
Loads dropped DLL
Reads user/profile data of web browsers
Blocklisted process makes network request
Boot or Logon Autostart Execution: Active Setup
Downloads MZ/PE file
Evasion via Device Credential Deployment
Event Triggered Execution: Image File Execution Options Injection
Please note that we are no longer able to provide a coverage score for Virus Total.

File information


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

Web download

RemcosRAT

HTML Application (hta) hta 02ab7fc405e543c9f72c21ce363aa9764f2ac2dbec7f4bd179f83cc89ada6e49

(this sample)

  
Delivery method
Distributed via web download

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