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Windows
Analysis Report
d1bc91bd44a0.exe
Overview
General Information
Detection
PrivateLoader, Stealc, Vidar
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
Antivirus detection for dropped file
Found malware configuration
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Suricata IDS alerts for network traffic
Yara detected AntiVM3
Yara detected Powershell download and execute
Yara detected PrivateLoader
Yara detected Stealc
Yara detected Vidar stealer
AI detected suspicious sample
Allocates memory in foreign processes
C2 URLs / IPs found in malware configuration
Contains functionality to inject code into remote processes
Drops PE files to the document folder of the user
Found API chain indicative of sandbox detection
Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Sigma detected: Silenttrinity Stager Msbuild Activity
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal browser information (history, passwords, etc)
Writes to foreign memory regions
AV process strings found (often used to terminate AV products)
Checks if Antivirus/Antispyware/Firewall program is installed (via WMI)
Checks if the current process is being debugged
Contains functionality to access loader functionality (e.g. LdrGetProcedureAddress)
Contains functionality to call native functions
Contains functionality to check if a debugger is running (IsDebuggerPresent)
Contains functionality to create guard pages, often used to hinder reverse engineering and debugging
Contains functionality to detect sandboxes (mouse cursor move detection)
Contains functionality to dynamically determine API calls
Contains functionality to query CPU information (cpuid)
Contains functionality to query locales information (e.g. system language)
Contains functionality to read the PEB
Contains functionality which may be used to detect a debugger (GetProcessHeap)
Creates a process in suspended mode (likely to inject code)
Detected potential crypto function
Downloads executable code via HTTP
Drops PE files
Found inlined nop instructions (likely shell or obfuscated code)
Found large amount of non-executed APIs
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 check the online IP address of the machine
May sleep (evasive loops) to hinder dynamic analysis
One or more processes crash
Queries information about the installed CPU (vendor, model number etc)
Queries the volume information (name, serial number etc) of a device
Sample execution stops while process was sleeping (likely an evasion)
Sample file is different than original file name gathered from version info
Suricata IDS alerts with low severity for network traffic
Uses 32bit PE files
Uses Microsoft's Enhanced Cryptographic Provider
Uses a known web browser user agent for HTTP communication
Uses code obfuscation techniques (call, push, ret)
Yara detected Credential Stealer
Classification
- System is w10x64
- d1bc91bd44a0.exe (PID: 8108 cmdline:
"C:\Users\ user\Deskt op\d1bc91b d44a0.exe" MD5: 3ABCB3BE6004E8A635837EAE43B97526) - MSBuild.exe (PID: 8132 cmdline:
"C:\Window s\Microsof t.NET\Fram ework\v4.0 .30319\MSB uild.exe" MD5: 8FDF47E0FF70C40ED3A17014AEEA4232) - 2OJr0kqvYIvMGmMoMnnzAHbc.exe (PID: 6196 cmdline:
C:\Users\u ser\Docume nts\iofolk o5\2OJr0kq vYIvMGmMoM nnzAHbc.ex e MD5: 2B7045094692BC5DD208CD1E195A6128) - MSBuild.exe (PID: 5748 cmdline:
"C:\Window s\Microsof t.NET\Fram ework\v4.0 .30319\MSB uild.exe" MD5: 8FDF47E0FF70C40ED3A17014AEEA4232) - WerFault.exe (PID: 2220 cmdline:
C:\Windows \SysWOW64\ WerFault.e xe -u -p 5 748 -s 127 2 MD5: C31336C1EFC2CCB44B4326EA793040F2) - WerFault.exe (PID: 6060 cmdline:
C:\Windows \SysWOW64\ WerFault.e xe -u -p 6 196 -s 260 MD5: C31336C1EFC2CCB44B4326EA793040F2) - HJCfr5V5_QVbJA3PPM7OVXSs.exe (PID: 5752 cmdline:
C:\Users\u ser\Docume nts\iofolk o5\HJCfr5V 5_QVbJA3PP M7OVXSs.ex e MD5: 33F127E35338687A1A64F67FA6ED3B9A) - MSBuild.exe (PID: 5876 cmdline:
"C:\Window s\Microsof t.NET\Fram ework\v4.0 .30319\MSB uild.exe" MD5: 8FDF47E0FF70C40ED3A17014AEEA4232) - MSBuild.exe (PID: 5924 cmdline:
"C:\Window s\Microsof t.NET\Fram ework\v4.0 .30319\MSB uild.exe" MD5: 8FDF47E0FF70C40ED3A17014AEEA4232) - WerFault.exe (PID: 4948 cmdline:
C:\Windows \SysWOW64\ WerFault.e xe -u -p 5 924 -s 142 0 MD5: C31336C1EFC2CCB44B4326EA793040F2) - WerFault.exe (PID: 5868 cmdline:
C:\Windows \SysWOW64\ WerFault.e xe -u -p 5 752 -s 260 MD5: C31336C1EFC2CCB44B4326EA793040F2) - WerFault.exe (PID: 7236 cmdline:
C:\Windows \SysWOW64\ WerFault.e xe -u -p 8 108 -s 260 MD5: C31336C1EFC2CCB44B4326EA793040F2) - conhost.exe (PID: 1844 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D)
- cleanup
Name | Description | Attribution | Blogpost URLs | Link |
---|---|---|---|---|
PrivateLoader | According to sekoia, PrivateLoader is a modular malware whose main capability is to download and execute one or several payloads. The loader implements anti-analysis techniques, fingerprints the compromised host and reports statistics to its C2 server. | No Attribution |
Name | Description | Attribution | Blogpost URLs | Link |
---|---|---|---|---|
Stealc | Stealc is an information stealer advertised by its presumed developer Plymouth on Russian-speaking underground forums and sold as a Malware-as-a-Service since January 9, 2023. According to Plymouth's statement, stealc is a non-resident stealer with flexible data collection settings and its development is relied on other prominent stealers: Vidar, Raccoon, Mars and Redline.Stealc is written in C and uses WinAPI functions. It mainly targets date from web browsers, extensions and Desktop application of cryptocurrency wallets, and from other applications (messengers, email clients, etc.). The malware downloads 7 legitimate third-party DLLs to collect sensitive data from web browsers, including sqlite3.dll, nss3.dll, vcruntime140.dll, mozglue.dll, freebl3.dll, softokn3.dll and msvcp140.dll. It then exfiltrates the collected information file by file to its C2 server using HTTP POST requests. | No Attribution |
Name | Description | Attribution | Blogpost URLs | Link |
---|---|---|---|---|
Vidar | Vidar is a forked malware based on Arkei. It seems this stealer is one of the first that is grabbing information on 2FA Software and Tor Browser. | No Attribution |
{"C2 url": "http://46.8.231.109/c4754d4f680ead72.php", "Botnet": "default"}
{"C2 url": ["https://steamcommunity.com/profiles/76561199780418869"], "Botnet": "320a15ec01391d287fbc11f1e7ed5665"}
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_Vidar_1 | Yara detected Vidar stealer | Joe Security |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_Stealc | Yara detected Stealc | Joe Security | ||
JoeSecurity_Stealc | Yara detected Stealc | Joe Security | ||
JoeSecurity_Stealc | Yara detected Stealc | Joe Security | ||
JoeSecurity_Stealc | Yara detected Stealc | Joe Security | ||
JoeSecurity_Vidar_1 | Yara detected Vidar stealer | Joe Security | ||
Click to see the 16 entries |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_Stealc | Yara detected Stealc | Joe Security | ||
JoeSecurity_Stealc | Yara detected Stealc | Joe Security | ||
JoeSecurity_Stealc | Yara detected Stealc | Joe Security | ||
JoeSecurity_Vidar_1 | Yara detected Vidar stealer | Joe Security | ||
JoeSecurity_AntiVM_3 | Yara detected AntiVM_3 | Joe Security | ||
Click to see the 10 entries |
System Summary |
---|
Source: | Author: Kiran kumar s, oscd.community: |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-10-04T15:54:13.885169+0200 | 2044247 | 1 | Malware Command and Control Activity Detected | 141.98.233.156 | 80 | 192.168.2.10 | 49947 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-10-04T15:53:30.224150+0200 | 2051831 | 1 | Malware Command and Control Activity Detected | 141.98.233.156 | 80 | 192.168.2.10 | 49947 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-10-04T15:54:13.151852+0200 | 2049087 | 1 | A Network Trojan was detected | 192.168.2.10 | 49947 | 141.98.233.156 | 80 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-10-04T15:53:45.518933+0200 | 2803270 | 2 | Potentially Bad Traffic | 192.168.2.10 | 49781 | 147.45.44.104 | 80 | TCP |
2024-10-04T15:53:45.519086+0200 | 2803270 | 2 | Potentially Bad Traffic | 192.168.2.10 | 49780 | 147.45.44.104 | 80 | TCP |
Click to jump to signature section
Show All Signature Results
AV Detection |
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Source: | Avira: |
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Source: | ReversingLabs: | ||
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Source: | Integrated Neural Analysis Model: |
Source: | Joe Sandbox ML: | ||
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Source: | Code function: | 2_2_0051C020 | |
Source: | Code function: | 2_2_0051BD80 | |
Source: | Code function: | 2_2_0051BF40 |
Source: | Static PE information: |
Source: | HTTPS traffic detected: | ||
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Spreading |
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Source: | File source: |
Source: | Code function: | 1_2_00A5730B | |
Source: | Code function: | 2_2_0053FAB6 | |
Source: | Code function: | 8_2_0097730B | |
Source: | Code function: | 9_2_00CE730B |
Source: | Code function: | 14_2_00415142 |
Source: | File opened: | Jump to behavior | ||
Source: | File opened: | Jump to behavior | ||
Source: | File opened: | Jump to behavior | ||
Source: | File opened: | Jump to behavior | ||
Source: | File opened: | Jump to behavior | ||
Source: | File opened: | Jump to behavior |
Source: | Code function: | 9_2_00CF938D | |
Source: | Code function: | 9_2_00CF938D | |
Source: | Code function: | 14_2_004014AD | |
Source: | Code function: | 14_2_004014AD |
Networking |
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Source: | File source: |
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Source: | HTTP traffic detected: |