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Windows
Analysis Report
lem.exe
Overview
General Information
Detection
Vidar
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Attempt to bypass Chrome Application-Bound Encryption
Found malware configuration
Multi AV Scanner detection for submitted file
Sigma detected: Search for Antivirus process
Suricata IDS alerts for network traffic
Yara detected Vidar stealer
AI detected suspicious sample
C2 URLs / IPs found in malware configuration
Drops PE files with a suspicious file extension
Found API chain indicative of sandbox detection
Found many strings related to Crypto-Wallets (likely being stolen)
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
Checks if Antivirus/Antispyware/Firewall program is installed (via WMI)
Contains functionality for read data from the clipboard
Contains functionality to block mouse and keyboard input (often used to hinder debugging)
Contains functionality to check if a debugger is running (IsDebuggerPresent)
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 dynamically determine API calls
Contains functionality to execute programs as a different user
Contains functionality to launch a process as a different user
Contains functionality to launch a program with higher privileges
Contains functionality to modify clipboard data
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 to read the clipboard data
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)
Creates a process in suspended mode (likely to inject code)
Creates files inside the system directory
Detected potential crypto function
Dropped file seen in connection with other malware
Drops PE files
Drops PE files to the application program directory (C:\ProgramData)
Drops files with a non-matching file extension (content does not match file extension)
Enables debug privileges
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
JA3 SSL client fingerprint seen in connection with other malware
May sleep (evasive loops) to hinder dynamic analysis
OS version to string mapping found (often used in BOTs)
PE / OLE file has an invalid certificate
PE file contains an invalid checksum
Potential key logger detected (key state polling based)
Queries the volume information (name, serial number etc) of a device
Sample execution stops while process was sleeping (likely an evasion)
Sigma detected: Browser Started with Remote Debugging
Sigma detected: Suspicious Copy From or To System Directory
Uses 32bit PE files
Uses code obfuscation techniques (call, push, ret)
Yara detected Credential Stealer
Classification
- System is w10x64
- lem.exe (PID: 6788 cmdline:
"C:\Users\ user\Deskt op\lem.exe " MD5: 27B18A5E8BDAA950AF93633A821C2BFA) - cmd.exe (PID: 6924 cmdline:
"C:\Window s\System32 \cmd.exe" /c copy Ch eats Cheat s.cmd && C heats.cmd MD5: D0FCE3AFA6AA1D58CE9FA336CC2B675B) - conhost.exe (PID: 6948 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) - tasklist.exe (PID: 7088 cmdline:
tasklist MD5: 0A4448B31CE7F83CB7691A2657F330F1) - conhost.exe (PID: 1720 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) - findstr.exe (PID: 2256 cmdline:
findstr /I "opssvc w rsa" MD5: F1D4BE0E99EC734376FDE474A8D4EA3E) - tasklist.exe (PID: 5436 cmdline:
tasklist MD5: 0A4448B31CE7F83CB7691A2657F330F1) - findstr.exe (PID: 1216 cmdline:
findstr "A vastUI AVG UI bdservi cehost nsW scSvc ekrn SophosHea lth" MD5: F1D4BE0E99EC734376FDE474A8D4EA3E) - cmd.exe (PID: 3444 cmdline:
cmd /c md 628056 MD5: D0FCE3AFA6AA1D58CE9FA336CC2B675B) - findstr.exe (PID: 7080 cmdline:
findstr /V "Cleared" Penalties MD5: F1D4BE0E99EC734376FDE474A8D4EA3E) - cmd.exe (PID: 2916 cmdline:
cmd /c cop y /b ..\Pa rticipatin g + ..\Pro duced + .. \Tvs + ..\ Contractor + ..\Legi slative u MD5: D0FCE3AFA6AA1D58CE9FA336CC2B675B) - Corrections.com (PID: 5496 cmdline:
Correction s.com u MD5: 62D09F076E6E0240548C2F837536A46A) - chrome.exe (PID: 4456 cmdline:
"C:\Progra m Files\Go ogle\Chrom e\Applicat ion\chrome .exe" --re mote-debug ging-port= 9223 --pro file-direc tory="Defa ult" MD5: 45DE480806D1B5D462A7DDE4DCEFC4E4) - chrome.exe (PID: 1228 cmdline:
"C:\Progra m Files\Go ogle\Chrom e\Applicat ion\chrome .exe" --ty pe=utility --utility -sub-type= network.mo jom.Networ kService - -lang=en-U S --servic e-sandbox- type=none --mojo-pla tform-chan nel-handle =2416 --fi eld-trial- handle=213 6,i,326898 2340233252 329,535405 0458271203 649,262144 /prefetch :8 MD5: 45DE480806D1B5D462A7DDE4DCEFC4E4) - cmd.exe (PID: 4852 cmdline:
"C:\Window s\system32 \cmd.exe" /c timeout /t 10 & d el /f /q " C:\Users\u ser\AppDat a\Local\Te mp\628056\ Correction s.com" & r d /s /q "C :\ProgramD ata\2N7Y58 YCJW47" & exit MD5: D0FCE3AFA6AA1D58CE9FA336CC2B675B) - conhost.exe (PID: 732 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) - timeout.exe (PID: 7052 cmdline:
timeout /t 10 MD5: 976566BEEFCCA4A159ECBDB2D4B1A3E3) - choice.exe (PID: 6636 cmdline:
choice /d y /t 5 MD5: FCE0E41C87DC4ABBE976998AD26C27E4)
- cleanup
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": "https://steamcommunity.com/profiles/76561199807592927", "Botnet": "d0wntg"}
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_Vidar_1 | Yara detected Vidar stealer | Joe Security |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_CredentialStealer | Yara detected Credential Stealer | Joe Security | ||
JoeSecurity_CredentialStealer | Yara detected Credential Stealer | Joe Security | ||
JoeSecurity_Vidar_1 | Yara detected Vidar stealer | Joe Security | ||
JoeSecurity_CredentialStealer | Yara detected Credential Stealer | Joe Security |
Source: | Author: pH-T (Nextron Systems), Nasreddine Bencherchali (Nextron Systems): |
Source: | Author: Florian Roth (Nextron Systems), Markus Neis, Tim Shelton (HAWK.IO), Nasreddine Bencherchali (Nextron Systems): |
HIPS / PFW / Operating System Protection Evasion |
---|
Source: | Author: Joe Security: |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-12-15T20:47:37.153833+0100 | 2044247 | 1 | Malware Command and Control Activity Detected | 116.203.12.241 | 443 | 192.168.2.4 | 49743 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-12-15T20:47:39.457532+0100 | 2051831 | 1 | Malware Command and Control Activity Detected | 116.203.12.241 | 443 | 192.168.2.4 | 49744 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-12-15T20:47:34.861412+0100 | 2049087 | 1 | A Network Trojan was detected | 192.168.2.4 | 49742 | 116.203.12.241 | 443 | TCP |
Click to jump to signature section
Show All Signature Results
AV Detection |
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Source: | Malware Configuration Extractor: |
Source: | ReversingLabs: |
Source: | Integrated Neural Analysis Model: |
Source: | Static PE information: |
Source: | HTTPS traffic detected: | ||
Source: | HTTPS traffic detected: |
Source: | Static PE information: |
Source: | Binary string: | ||
Source: | Binary string: |
Source: | Code function: | 0_2_00406301 | |
Source: | Code function: | 0_2_00406CC7 | |
Source: | Code function: | 10_2_0098DC54 | |
Source: | Code function: | 10_2_0099A087 | |
Source: | Code function: | 10_2_0099A1E2 | |
Source: | Code function: | 10_2_0098E472 | |
Source: | Code function: | 10_2_0099A570 | |
Source: | Code function: | 10_2_009966DC | |
Source: | Code function: | 10_2_0095C622 | |
Source: | Code function: | 10_2_009973D4 | |
Source: | Code function: | 10_2_00997333 | |
Source: | Code function: | 10_2_0098D921 |
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: | Memory has grown: |
Networking |
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Source: | Suricata IDS: | ||
Source: | Suricata IDS: | ||
Source: | Suricata IDS: |
Source: | URLs: |
Source: | HTTP traffic detected: |
Source: | IP Address: | ||
Source: | IP Address: | ||
Source: | IP Address: | ||
Source: | IP Address: |
Source: | ASN Name: |
Source: | JA3 fingerprint: |
Source: | TCP traffic detected without corresponding DNS query: | ||
Source: | TCP traffic detected without corresponding DNS query: | ||
Source: | TCP traffic detected without corresponding DNS query: | ||
Source: | TCP traffic detected without corresponding DNS query: | ||
Source: | TCP traffic detected without corresponding DNS query: | ||
Source: | TCP traffic detected without corresponding DNS query: | ||
Source: | TCP traffic detected without corresponding DNS query: | ||
Source: | UDP traffic detected without corresponding DNS query: | ||
Source: | UDP traffic detected without corresponding DNS query: | ||
Source: | UDP traffic detected without corresponding DNS query: | ||
Source: | UDP traffic detected without corresponding DNS query: | ||
Source: | UDP traffic detected without corresponding DNS query: |
Source: | Code function: | 10_2_0099D889 |
Source: | HTTP traffic detected: | ||
Source: | HTTP traffic detected: | ||
Source: | HTTP traffic detected: | ||
Source: | HTTP traffic detected: | ||
Source: | HTTP traffic detected: |
Source: | String found in binary or memory: |