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Windows
Analysis Report
yjzllYsjlU.exe
Overview
General Information
Sample name: | yjzllYsjlU.exerenamed because original name is a hash value |
Original sample name: | 05b4b94fe502b06454e6fe20b6965c76.exe |
Analysis ID: | 1518031 |
MD5: | 05b4b94fe502b06454e6fe20b6965c76 |
SHA1: | bfa65de4bbea7bf16322882eb0cbb0909efcf0db |
SHA256: | 4a5c55ccde112d37cacac44e44b9dea894299902f10a9c6ca4505b145019fdd1 |
Tags: | exeStealcuser-abuse_ch |
Infos: | |
Detection
Amadey, Stealc
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
Detected unpacking (changes PE section rights)
Detected unpacking (overwrites its own PE header)
Found malware configuration
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Suricata IDS alerts for network traffic
Yara detected Amadeys stealer DLL
Yara detected Stealc
AI detected suspicious sample
C2 URLs / IPs found in malware configuration
Contains functionality to inject code into remote processes
Machine Learning detection for sample
AV process strings found (often used to terminate AV products)
Checks if the current process is being debugged
Contains functionality to call native functions
Contains functionality to check if a debugger is running (IsDebuggerPresent)
Contains functionality to dynamically determine API calls
Contains functionality to open a port and listen for incoming connection (possibly a backdoor)
Contains functionality to query CPU information (cpuid)
Contains functionality to read the PEB
Contains functionality which may be used to detect a debugger (GetProcessHeap)
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Creates files inside the system directory
Creates job files (autostart)
Detected potential crypto function
Downloads executable code via HTTP
Drops PE files
Extensive use of GetProcAddress (often used to hide API calls)
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 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
May sleep (evasive loops) to hinder dynamic analysis
One or more processes crash
Queries the volume information (name, serial number etc) of a device
Sample execution stops while process was sleeping (likely an evasion)
Sigma detected: CurrentVersion Autorun Keys Modification
Suricata IDS alerts with low severity for network traffic
Uses 32bit PE files
Uses code obfuscation techniques (call, push, ret)
Yara signature match
Classification
- System is w10x64
- yjzllYsjlU.exe (PID: 6716 cmdline:
"C:\Users\ user\Deskt op\yjzllYs jlU.exe" MD5: 05B4B94FE502B06454E6FE20B6965C76) - WerFault.exe (PID: 2548 cmdline:
C:\Windows \SysWOW64\ WerFault.e xe -u -p 6 716 -s 720 MD5: C31336C1EFC2CCB44B4326EA793040F2) - WerFault.exe (PID: 6240 cmdline:
C:\Windows \SysWOW64\ WerFault.e xe -u -p 6 716 -s 788 MD5: C31336C1EFC2CCB44B4326EA793040F2) - WerFault.exe (PID: 2848 cmdline:
C:\Windows \SysWOW64\ WerFault.e xe -u -p 6 716 -s 852 MD5: C31336C1EFC2CCB44B4326EA793040F2) - WerFault.exe (PID: 1908 cmdline:
C:\Windows \SysWOW64\ WerFault.e xe -u -p 6 716 -s 896 MD5: C31336C1EFC2CCB44B4326EA793040F2) - WerFault.exe (PID: 7152 cmdline:
C:\Windows \SysWOW64\ WerFault.e xe -u -p 6 716 -s 920 MD5: C31336C1EFC2CCB44B4326EA793040F2) - WerFault.exe (PID: 5752 cmdline:
C:\Windows \SysWOW64\ WerFault.e xe -u -p 6 716 -s 852 MD5: C31336C1EFC2CCB44B4326EA793040F2) - WerFault.exe (PID: 2672 cmdline:
C:\Windows \SysWOW64\ WerFault.e xe -u -p 6 716 -s 104 4 MD5: C31336C1EFC2CCB44B4326EA793040F2) - WerFault.exe (PID: 5980 cmdline:
C:\Windows \SysWOW64\ WerFault.e xe -u -p 6 716 -s 112 0 MD5: C31336C1EFC2CCB44B4326EA793040F2) - WerFault.exe (PID: 6508 cmdline:
C:\Windows \SysWOW64\ WerFault.e xe -u -p 6 716 -s 117 6 MD5: C31336C1EFC2CCB44B4326EA793040F2) - skotes.exe (PID: 6008 cmdline:
"C:\Users\ user\AppDa ta\Local\T emp\abc3bc 1985\skote s.exe" MD5: 05B4B94FE502B06454E6FE20B6965C76) - WerFault.exe (PID: 3064 cmdline:
C:\Windows \SysWOW64\ WerFault.e xe -u -p 6 008 -s 468 MD5: C31336C1EFC2CCB44B4326EA793040F2) - WerFault.exe (PID: 2128 cmdline:
C:\Windows \SysWOW64\ WerFault.e xe -u -p 6 716 -s 140 0 MD5: C31336C1EFC2CCB44B4326EA793040F2)
- skotes.exe (PID: 1488 cmdline:
C:\Users\u ser\AppDat a\Local\Te mp\abc3bc1 985\skotes .exe MD5: 05B4B94FE502B06454E6FE20B6965C76) - WerFault.exe (PID: 6784 cmdline:
C:\Windows \SysWOW64\ WerFault.e xe -u -p 1 488 -s 536 MD5: C31336C1EFC2CCB44B4326EA793040F2) - WerFault.exe (PID: 2672 cmdline:
C:\Windows \SysWOW64\ WerFault.e xe -u -p 1 488 -s 732 MD5: C31336C1EFC2CCB44B4326EA793040F2) - WerFault.exe (PID: 5980 cmdline:
C:\Windows \SysWOW64\ WerFault.e xe -u -p 1 488 -s 740 MD5: C31336C1EFC2CCB44B4326EA793040F2) - WerFault.exe (PID: 4900 cmdline:
C:\Windows \SysWOW64\ WerFault.e xe -u -p 1 488 -s 756 MD5: C31336C1EFC2CCB44B4326EA793040F2)
- cleanup
Name | Description | Attribution | Blogpost URLs | Link |
---|---|---|---|---|
Amadey | Amadey is a botnet that appeared around October 2018 and is being sold for about $500 on Russian-speaking hacking forums. It periodically sends information about the system and installed AV software to its C2 server and polls to receive orders from it. Its main functionality is that it can load other payloads (called "tasks") for all or specifically targeted computers compromised by the malware. | 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 |
{"C2 url": "185.215.113.43/Zu7JuNko/index.php", "Version": "4.42", "Install Folder": "abc3bc1985", "Install File": "skotes.exe"}
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_Stealc_1 | Yara detected Stealc | Joe Security |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
Windows_Trojan_RedLineStealer_ed346e4c | unknown | unknown |
| |
Windows_Trojan_RedLineStealer_ed346e4c | unknown | unknown |
| |
Windows_Trojan_RedLineStealer_ed346e4c | unknown | unknown |
| |
JoeSecurity_Amadey_2 | Yara detected Amadey\'s stealer DLL | Joe Security | ||
JoeSecurity_Amadey_2 | Yara detected Amadey\'s stealer DLL | Joe Security | ||
Click to see the 10 entries |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_Amadey_2 | Yara detected Amadey\'s stealer DLL | Joe Security | ||
JoeSecurity_Amadey_2 | Yara detected Amadey\'s stealer DLL | Joe Security | ||
JoeSecurity_Amadey_2 | Yara detected Amadey\'s stealer DLL | Joe Security | ||
JoeSecurity_Amadey_2 | Yara detected Amadey\'s stealer DLL | Joe Security | ||
JoeSecurity_Amadey_2 | Yara detected Amadey\'s stealer DLL | Joe Security | ||
Click to see the 13 entries |
System Summary |
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Source: | Author: Victor Sergeev, Daniil Yugoslavskiy, Gleb Sukhodolskiy, Timur Zinniatullin, oscd.community, Tim Shelton, frack113 (split): |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-09-25T10:33:30.308410+0200 | 2044696 | 1 | A Network Trojan was detected | 192.168.2.6 | 64686 | 185.215.113.43 | 80 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-09-25T10:33:26.271870+0200 | 2044245 | 1 | Malware Command and Control Activity Detected | 185.215.113.37 | 80 | 192.168.2.6 | 64682 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-09-25T10:33:26.265770+0200 | 2044244 | 1 | Malware Command and Control Activity Detected | 192.168.2.6 | 64682 | 185.215.113.37 | 80 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-09-25T10:33:26.486604+0200 | 2044246 | 1 | Malware Command and Control Activity Detected | 192.168.2.6 | 64682 | 185.215.113.37 | 80 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-09-25T10:33:27.642684+0200 | 2044248 | 1 | Malware Command and Control Activity Detected | 192.168.2.6 | 64682 | 185.215.113.37 | 80 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-09-25T10:33:26.493256+0200 | 2044247 | 1 | Malware Command and Control Activity Detected | 185.215.113.37 | 80 | 192.168.2.6 | 64682 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-09-25T10:33:26.046162+0200 | 2044243 | 1 | Malware Command and Control Activity Detected | 192.168.2.6 | 64682 | 185.215.113.37 | 80 | TCP |
2024-09-25T10:33:53.000344+0200 | 2044243 | 1 | Malware Command and Control Activity Detected | 192.168.2.6 | 64700 | 185.215.113.37 | 80 | TCP |
2024-09-25T10:33:56.102303+0200 | 2044243 | 1 | Malware Command and Control Activity Detected | 192.168.2.6 | 64705 | 185.215.113.37 | 80 | TCP |
2024-09-25T10:34:00.223240+0200 | 2044243 | 1 | Malware Command and Control Activity Detected | 192.168.2.6 | 64708 | 185.215.113.37 | 80 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-09-25T10:33:26.537731+0200 | 2856121 | 1 | A Network Trojan was detected | 192.168.2.6 | 64683 | 185.215.113.43 | 80 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-09-25T10:33:11.607701+0200 | 2856147 | 1 | A Network Trojan was detected | 192.168.2.6 | 49750 | 185.215.113.43 | 80 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-09-25T10:33:25.592506+0200 | 2856122 | 1 | A Network Trojan was detected | 185.215.113.43 | 80 | 192.168.2.6 | 64680 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-09-25T10:33:21.971959+0200 | 2803305 | 3 | Unknown Traffic | 192.168.2.6 | 64681 | 185.215.113.103 | 80 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-09-25T10:33:28.070732+0200 | 2803304 | 3 | Unknown Traffic | 192.168.2.6 | 64682 | 185.215.113.37 | 80 | TCP |
2024-09-25T10:33:32.850576+0200 | 2803304 | 3 | Unknown Traffic | 192.168.2.6 | 64682 | 185.215.113.37 | 80 | TCP |
2024-09-25T10:33:34.611706+0200 | 2803304 | 3 | Unknown Traffic | 192.168.2.6 | 64682 | 185.215.113.37 | 80 | TCP |
2024-09-25T10:33:35.954713+0200 | 2803304 | 3 | Unknown Traffic | 192.168.2.6 | 64682 | 185.215.113.37 | 80 | TCP |
2024-09-25T10:33:37.425841+0200 | 2803304 | 3 | Unknown Traffic | 192.168.2.6 | 64682 | 185.215.113.37 | 80 | TCP |
2024-09-25T10:33:45.085160+0200 | 2803304 | 3 | Unknown Traffic | 192.168.2.6 | 64682 | 185.215.113.37 | 80 | TCP |
2024-09-25T10:33:46.175156+0200 | 2803304 | 3 | Unknown Traffic | 192.168.2.6 | 64682 | 185.215.113.37 | 80 | TCP |
2024-09-25T10:33:48.531183+0200 | 2803304 | 3 | Unknown Traffic | 192.168.2.6 | 64695 | 185.215.113.103 | 80 | TCP |
Click to jump to signature section
Show All Signature Results
AV Detection |
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Source: | Avira: |
Source: | Avira URL Cloud: | ||
Source: | Avira URL Cloud: | ||
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Source: | Avira URL Cloud: | ||
Source: | Avira URL Cloud: |
Source: | Malware Configuration Extractor: |
Source: | ReversingLabs: | ||
Source: | ReversingLabs: | ||
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Source: | ReversingLabs: |
Source: | ReversingLabs: |
Source: | Integrated Neural Analysis Model: |
Source: | Joe Sandbox ML: |
Compliance |
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Source: | Unpacked PE file: | ||
Source: | Unpacked PE file: | ||
Source: | Unpacked PE file: |
Source: | Static PE information: |
Source: | File opened: | Jump to behavior |
Source: | Code function: | 0_2_0043DC0D | |
Source: | Code function: | 0_2_021BDE74 | |
Source: | Code function: | 21_2_021ADE74 | |
Source: | Code function: | 28_2_0043DC0D | |
Source: | Code function: | 28_2_0065DE74 |
Source: | File opened: | ||
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Source: | File opened: |
Networking |
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Source: | IPs: |
Source: | HTTP traffic detected: |