Joe Sandbox Cloud Basic Analysis Report

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Windows Analysis Report
zyJWi2vy29.exe

Overview

General Information

Sample name:zyJWi2vy29.exe
renamed because original name is a hash value
Original sample name:97768ab0a4837757b74de2ae892badab.exe
Analysis ID:1465070
MD5:97768ab0a4837757b74de2ae892badab
SHA1:d8bdfdb717b64ee4cd7a892bbddd293f7eaf915c
SHA256:0f88ea51a56da966d12311a4b20ea3a6c44315e00747a589f19cf535f90ced77
Tags:32exetrojan
Infos:

Detection

LummaC, PureLog Stealer, RisePro Stealer, Vidar, zgRAT
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
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Snort IDS alert for network traffic
Yara detected LummaC Stealer
Yara detected Powershell download and execute
Yara detected PureLog Stealer
Yara detected RisePro Stealer
Yara detected Vidar stealer
Yara detected zgRAT
AI detected suspicious sample
Allocates memory in foreign processes
C2 URLs / IPs found in malware configuration
Contains functionality to inject code into remote processes
Contains functionality to inject threads in other processes
Creates multiple autostart registry keys
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)
Found many strings related to Crypto-Wallets (likely being stolen)
Found stalling execution ending in API Sleep call
Injects a PE file into a foreign processes
LummaC encrypted strings found
Machine Learning detection for dropped file
Machine Learning detection for sample
Query firmware table information (likely to detect VMs)
Sample uses string decryption to hide its real strings
Searches for specific processes (likely to inject)
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
Tries to steal Mail credentials (via file / registry access)
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
AV process strings found (often used to terminate AV products)
Allocates memory with a write watch (potentially for evading sandboxes)
Binary contains a suspicious time stamp
Checks if Antivirus/Antispyware/Firewall program is installed (via WMI)
Checks if the current process is being debugged
Contains functionality to check if a debugger is running (IsDebuggerPresent)
Contains functionality to detect sandboxes (mouse cursor move detection)
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 query locales information (e.g. system language)
Contains functionality to read the PEB
Contains functionality to record screenshots
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
Downloads executable code via HTTP
Drops PE files
Drops PE files to the application program directory (C:\ProgramData)
Enables debug privileges
Enables security privileges
Extensive use of GetProcAddress (often used to hide API calls)
Found decision node followed by non-executed suspicious APIs
Found dropped PE file which has not been started or loaded
Found evasive API chain (date check)
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
Installs a raw input device (often for capturing keystrokes)
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
PE file contains sections with non-standard names
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
Searches for user specific document files
Sigma detected: CurrentVersion Autorun Keys Modification
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)
Uses the system / local time for branch decision (may execute only at specific dates)
Yara detected Credential Stealer
Yara signature match

Classification

Process Tree

  • System is w10x64
  • zyJWi2vy29.exe (PID: 7548 cmdline: "C:\Users\user\Desktop\zyJWi2vy29.exe" MD5: 97768AB0A4837757B74DE2AE892BADAB)
    • conhost.exe (PID: 7556 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: 0D698AF330FD17BEE3BF90011D49251D)
    • RegAsm.exe (PID: 7616 cmdline: "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe" MD5: 0D5DF43AF2916F47D00C1573797C1A13)
    • RegAsm.exe (PID: 7624 cmdline: "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe" MD5: 0D5DF43AF2916F47D00C1573797C1A13)