Windows
Analysis Report
Nepomuk.exe
Overview
General Information
Detection
GO Backdoor, LummaC Stealer
Score: | 100 |
Range: | 0 - 100 |
Confidence: | 100% |
Signatures
Antivirus detection for URL or domain
Detected unpacking (creates a PE file in dynamic memory)
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 GO Backdoor
Yara detected LummaC Stealer
C2 URLs / IPs found in malware configuration
Connects to many ports of the same IP (likely port scanning)
Contain functionality to detect virtual machines
Contains functionality to detect sleep reduction / modifications
Contains functionality to encrypt and move a file in one function
Contains functionality to log keystrokes
Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
Joe Sandbox ML detected suspicious sample
Queries sensitive video device information (via WMI, Win32_VideoController, 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: New RUN Key Pointing to Suspicious Folder
Sigma detected: Suspicious Script Execution From Temp Folder
Suspicious powershell command line found
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)
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)
Contains functionality for read data from the clipboard
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 check if a debugger is running (OutputDebugString,GetLastError)
Contains functionality to check if a window is minimized (may be used to check if an application is visible)
Contains functionality to communicate with device drivers
Contains functionality to delete services
Contains functionality to dynamically determine API calls
Contains functionality to enumerate running services
Contains functionality to execute programs as a different user
Contains functionality to read the PEB
Contains functionality to read the clipboard data
Contains functionality to record screenshots
Contains functionality to retrieve information about pressed keystrokes
Contains functionality to shutdown / reboot the system
Contains functionality to simulate keystroke presses
Contains functionality to simulate mouse events
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)
Detected TCP or UDP traffic on non-standard ports
Detected potential crypto function
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 evasive API chain (might use process or thread times for sandbox detection)
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
JA3 SSL client fingerprint seen in connection with other malware
May check if the current machine is a sandbox (GetTickCount - Sleep)
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
Searches for user specific document files
Sigma detected: CurrentVersion Autorun Keys Modification
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)
Very long cmdline option found, this is very uncommon (may be encrypted or packed)
Classification
- System is w10x64
Nepomuk.exe (PID: 7724 cmdline:
"C:\Users\ user\Deskt op\Nepomuk .exe" MD5: FAC9214C35AF0181C30099C68920F445) T68WJ1SM1U30WFLN7XXTLWOX8.exe (PID: 5852 cmdline:
"C:\Users\ user\AppDa ta\Local\T emp\T68WJ1 SM1U30WFLN 7XXTLWOX8. exe" MD5: 8DDC00B505740E2BE081FCF120A6523A) powershell.exe (PID: 4364 cmdline:
powershell -WindowSt yle hidden -Command "if (-Not (Test-Path \"HKCU:\\ Software\\ Microsoft\ \Windows\\ CurrentVer sion\\Run\ \App\")) { Set-ItemP roperty -P ath \"HKCU :\\Softwar e\\Microso ft\\Window s\\Current Version\\R un\" -Name \"App\" - Value \"C: \Users\use r\AppData\ Local\Temp \T68WJ1SM1 U30WFLN7XX TLWOX8.exe \" }" MD5: C32CA4ACFCC635EC1EA6ED8A34DF5FAC) conhost.exe (PID: 6076 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D)
T68WJ1SM1U30WFLN7XXTLWOX8.exe (PID: 4508 cmdline:
"C:\Users\ user\AppDa ta\Local\T emp\T68WJ1 SM1U30WFLN 7XXTLWOX8. exe" MD5: 8DDC00B505740E2BE081FCF120A6523A) powershell.exe (PID: 7316 cmdline:
powershell -WindowSt yle hidden -Command "if (-Not (Test-Path \"HKCU:\\ Software\\ Microsoft\ \Windows\\ CurrentVer sion\\Run\ \App\")) { Set-ItemP roperty -P ath \"HKCU :\\Softwar e\\Microso ft\\Window s\\Current Version\\R un\" -Name \"App\" - Value \"C: \Users\use r\AppData\ Local\Temp \T68WJ1SM1 U30WFLN7XX TLWOX8.exe \" }" MD5: C32CA4ACFCC635EC1EA6ED8A34DF5FAC) conhost.exe (PID: 7364 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D)
T68WJ1SM1U30WFLN7XXTLWOX8.exe (PID: 1732 cmdline:
"C:\Users\ user\AppDa ta\Local\T emp\T68WJ1 SM1U30WFLN 7XXTLWOX8. exe" MD5: 8DDC00B505740E2BE081FCF120A6523A) powershell.exe (PID: 5692 cmdline:
powershell -WindowSt yle hidden -Command "if (-Not (Test-Path \"HKCU:\\ Software\\ Microsoft\ \Windows\\ CurrentVer sion\\Run\ \App\")) { Set-ItemP roperty -P ath \"HKCU :\\Softwar e\\Microso ft\\Window s\\Current Version\\R un\" -Name \"App\" - Value \"C: \Users\use r\AppData\ Local\Temp \T68WJ1SM1 U30WFLN7XX TLWOX8.exe \" }" MD5: C32CA4ACFCC635EC1EA6ED8A34DF5FAC) conhost.exe (PID: 5840 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D)
- cleanup
{"C2 url": ["quantyu.bet/AOSkwi", "soursopsf.run/gsoiao", "changeaie.top/geps", "easyupgw.live/eosz", "liftally.top/xasj", "upmodini.digital/gokk", "salaccgfa.top/gsooz", "zestmodp.top/zeda", "xcelmodo.run/nahd"], "Build id": "3cb89e8f70940188c63e82bafa7e7cbee0b03187b6a25af18f"}
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_LummaCStealer_3 | Yara detected LummaC Stealer | Joe Security |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_LummaCStealer | Yara detected LummaC Stealer | Joe Security | ||
JoeSecurity_GOBackdoor | Yara detected GO Backdoor | Joe Security | ||
JoeSecurity_GOBackdoor | Yara detected GO Backdoor | Joe Security | ||
JoeSecurity_LummaCStealer_4 | Yara detected LummaC Stealer | Joe Security | ||
JoeSecurity_GOBackdoor | Yara detected GO Backdoor | Joe Security | ||
Click to see the 7 entries |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_LummaCStealer_4 | Yara detected LummaC Stealer | Joe Security | ||
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: Florian Roth (Nextron Systems), Markus Neis, Sander Wiebing: |
Source: | Author: Florian Roth (Nextron Systems), Max Altgelt (Nextron Systems), Tim Shelton: |
Source: | Author: Victor Sergeev, Daniil Yugoslavskiy, Gleb Sukhodolskiy, Timur Zinniatullin, oscd.community, Tim Shelton, frack113 (split): |
Source: | Author: Roberto Rodriguez @Cyb3rWard0g (rule), oscd.community (improvements): |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2025-04-12T09:26:25.294844+0200 | 2028371 | 3 | Unknown Traffic | 192.168.2.4 | 49716 | 104.21.42.7 | 443 | TCP |
2025-04-12T09:26:27.084877+0200 | 2028371 | 3 | Unknown Traffic | 192.168.2.4 | 49717 | 104.21.42.7 | 443 | TCP |
2025-04-12T09:26:28.341631+0200 | 2028371 | 3 | Unknown Traffic | 192.168.2.4 | 49718 | 104.21.42.7 | 443 | TCP |
2025-04-12T09:26:29.570168+0200 | 2028371 | 3 | Unknown Traffic | 192.168.2.4 | 49719 | 104.21.42.7 | 443 | TCP |
2025-04-12T09:26:31.652698+0200 | 2028371 | 3 | Unknown Traffic | 192.168.2.4 | 49720 | 104.21.42.7 | 443 | TCP |
2025-04-12T09:26:33.229489+0200 | 2028371 | 3 | Unknown Traffic | 192.168.2.4 | 49721 | 104.21.42.7 | 443 | TCP |
2025-04-12T09:26:36.799930+0200 | 2028371 | 3 | Unknown Traffic | 192.168.2.4 | 49727 | 104.21.42.7 | 443 | TCP |
2025-04-12T09:26:37.754261+0200 | 2028371 | 3 | Unknown Traffic | 192.168.2.4 | 49728 | 140.82.114.3 | 443 | TCP |
2025-04-12T09:26:38.633161+0200 | 2028371 | 3 | Unknown Traffic | 192.168.2.4 | 49729 | 185.199.111.133 | 443 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2025-04-12T09:26:25.294844+0200 | 2061396 | 1 | Domain Observed Used for C2 Detected | 192.168.2.4 | 49716 | 104.21.42.7 | 443 | TCP |
2025-04-12T09:26:27.084877+0200 | 2061396 | 1 | Domain Observed Used for C2 Detected | 192.168.2.4 | 49717 | 104.21.42.7 | 443 | TCP |
2025-04-12T09:26:28.341631+0200 | 2061396 | 1 | Domain Observed Used for C2 Detected | 192.168.2.4 | 49718 | 104.21.42.7 | 443 | TCP |
2025-04-12T09:26:29.570168+0200 | 2061396 | 1 | Domain Observed Used for C2 Detected | 192.168.2.4 | 49719 | 104.21.42.7 | 443 | TCP |
2025-04-12T09:26:31.652698+0200 | 2061396 | 1 | Domain Observed Used for C2 Detected | 192.168.2.4 | 49720 | 104.21.42.7 | 443 | TCP |
2025-04-12T09:26:33.229489+0200 | 2061396 | 1 | Domain Observed Used for C2 Detected | 192.168.2.4 | 49721 | 104.21.42.7 | 443 | TCP |
2025-04-12T09:26:36.799930+0200 | 2061396 | 1 | Domain Observed Used for C2 Detected | 192.168.2.4 | 49727 | 104.21.42.7 | 443 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2025-04-12T09:26:24.859642+0200 | 2061395 | 1 | Domain Observed Used for C2 Detected | 192.168.2.4 | 49666 | 1.1.1.1 | 53 | UDP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2025-04-12T09:26:24.734313+0200 | 2061393 | 1 | Domain Observed Used for C2 Detected | 192.168.2.4 | 57934 | 1.1.1.1 | 53 | UDP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2025-04-12T09:26:39.185271+0200 | 2822537 | 1 | Attempted User Privilege Gain | 185.199.111.133 | 443 | 192.168.2.4 | 49729 | TCP |
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Show All Signature Results
AV Detection |
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Source: | Virustotal: | Perma Link | ||
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