Joe Sandbox Cloud Basic Analysis Report

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Windows Analysis Report
file.exe

Overview

General Information

Sample name:file.exe
Analysis ID:1565525
MD5:245042b39f7fe432daf72c046d5000d3
SHA1:f3ae48a9bd52536b83b76ed988558e5681009e96
SHA256:1c4b207bb8d58a6068ed2be0eb27653a7245dfe8fee548c4720d14510453c27c
Tags:exeuser-Bitsight
Infos:

Detection

Clipboard Hijacker, Cryptbot
Score:100
Range:0 - 100
Whitelisted:false
Confidence:100%

Signatures

Antivirus / Scanner detection for submitted sample
Attempt to bypass Chrome Application-Bound Encryption
Multi AV Scanner detection for submitted file
Suricata IDS alerts for network traffic
Yara detected Clipboard Hijacker
Yara detected Cryptbot
AI detected suspicious sample
Drops large PE files
Found evasive API chain (may stop execution after checking mutex)
Found stalling execution ending in API Sleep call
Hides threads from debuggers
Leaks process information
Machine Learning detection for sample
PE file contains section with special chars
Sigma detected: Suspicious Scheduled Task Creation Involving Temp Folder
Tries to detect process monitoring tools (Task Manager, Process Explorer etc.)
Tries to detect sandboxes / dynamic malware analysis system (registry check)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect sandboxes and other dynamic analysis tools (window names)
Tries to detect virtualization through RDTSC time measurements
Tries to evade debugger and weak emulator (self modifying code)
Tries to harvest and steal browser information (history, passwords, etc)
Uses schtasks.exe or at.exe to add and modify task schedules
AV process strings found (often used to terminate AV products)
Abnormal high CPU Usage
Checks for debuggers (devices)
Checks if the current process is being debugged
Contains capabilities to detect virtual machines
Contains functionality for read data from the clipboard
Contains functionality to dynamically determine API calls
Contains functionality to modify clipboard data
Contains functionality to query CPU information (cpuid)
Contains functionality to read the clipboard data
Detected potential crypto function
Drops PE files
Entry point lies outside standard sections
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
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
May sleep (evasive loops) to hinder dynamic analysis
One or more processes crash
PE file contains an invalid checksum
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)
Sigma detected: Browser Started with Remote Debugging
Sigma detected: Suspicious Schtasks From Env Var Folder
Uses 32bit PE files
Uses Microsoft's Enhanced Cryptographic Provider
Uses code obfuscation techniques (call, push, ret)

Classification

Process Tree

  • System is w10x64
  • file.exe (PID: 4144 cmdline: "C:\Users\user\Desktop\file.exe" MD5: 245042B39F7FE432DAF72C046D5000D3)
    • chrome.exe (PID: 1312 cmdline: "C:\Program Files\Google\Chrome\Application\chrome.exe" --remote-debugging-port=9222 --profile-directory="Default" MD5: 45DE480806D1B5D462A7DDE4DCEFC4E4)
      • chrome.exe (PID: 6732 cmdline: "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2380 --field-trial-handle=2340,i,1016166225095006826,12192068235695981454,262144 /prefetch:8 MD5: 45DE480806D1B5D462A7DDE4DCEFC4E4)
    • service123.exe (PID: 7664 cmdline: "C:\Users\user\AppData\Local\Temp\service123.exe" MD5: 7712B03AF17C2844EB8186B44159FC80)
    • schtasks.exe (PID: 7688 cmdline: "C:\Windows\System32\schtasks.exe" /create /tn "ServiceData4" /tr "C:\Users\user\AppData\Local\Temp\/service123.exe" /st 00:01 /du 9800:59 /sc once /ri 1 /f MD5: 48C2FE20575769DE916F48EF0676A965)
      • conhost.exe (PID: 7704 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: 0D698AF330FD17BEE3BF90011D49251D)
    • WerFault.exe (PID: 7808 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 4144 -s 1844 MD5: C31336C1EFC2CCB44B4326EA793040F2)
  • service123.exe (PID: 7864 cmdline: C:\Users\user\AppData\Local\Temp\/service123.exe MD5: 7712B03AF17C2844EB8186B44159FC80)
  • service123.exe (PID: 8016 cmdline: C:\Users\user\AppData\Local\Temp\/service123.exe MD5: 7712B03AF17C2844EB8186B44159FC80)
  • service123.exe (PID: 2356 cmdline: C:\Users\user\AppData\Local\Temp\/service123.exe MD5: 7712B03AF17C2844EB8186B44159FC80)
  • service123.exe (PID: 3672 cmdline: C:\Users\user\AppData\Local\Temp\/service123.exe MD5: 7712B03AF17C2844EB8186B44159FC80)
  • cleanup

Malware Threat Intel

Provided by

NameDescriptionAttributionBlogpost URLsLink
CryptBotA typical infostealer, capable of obtaining credentials for browsers, crypto currency wallets, browser cookies, credit cards, and creates screenshots of the infected system. All stolen data is bundled into a zip-file that is uploaded to the c2.No Attributionhttps://malpedia.caad.fkie.fraunhofer.de/details/win.cryptbot

Malware Configuration

⊘No configs have been found

Yara Signatures

PCAP (Network Traffic)

SourceRuleDescriptionAuthorStrings
dump.pcapJoeSecurity_CryptbotYara detected CryptbotJoe Security

    Memory Dumps

    SourceRuleDescriptionAuthorStrings
    Process Memory Space: service123.exe PID: 7664JoeSecurity_Clipboard_Hijacker_5Yara detected Clipboard HijackerJoe Security

      Unpacked PEs

      SourceRuleDescriptionAuthorStrings
      8.2.service123.exe.6c170000.1.unpackJoeSecurity_Clipboard_Hijacker_5Yara detected Clipboard HijackerJoe Security

        Sigma Signatures

        System Summary

        barindex
        Sigma detected: Suspicious Scheduled Task Creation Involving Temp Folder
        Source: Process startedAuthor: Florian Roth (Nextron Systems): Data: Command: "C:\Windows\System32\schtasks.exe" /create /tn "ServiceData4" /tr "C:\Users\user\AppData\Local\Temp\/service123.exe" /st 00:01 /du 9800:59 /sc once /ri 1 /f, CommandLine: "C:\Windows\System32\schtasks.exe" /create /tn "ServiceData4" /tr "C:\Users\user\AppData\Local\Temp\/service123.exe" /st 00:01 /du 9800:59 /sc once /ri 1 /f, CommandLine|base64offset|contains: j, Image: C:\Windows\SysWOW64\schtasks.exe, NewProcessName: C:\Windows\SysWOW64\schtasks.exe, OriginalFileName: C:\Windows\SysWOW64\schtasks.exe, ParentCommandLine: "C:\Users\user\Desktop\file.exe", ParentImage: C:\Users\user\Desktop\file.exe, ParentProcessId: 4144, ParentProcessName: file.exe, ProcessCommandLine: "C:\Windows\System32\schtasks.exe" /create /tn "ServiceData4" /tr "C:\Users\user\AppData\Local\Temp\/service123.exe" /st 00:01 /du 9800:59 /sc once /ri 1 /f, ProcessId: 7688, ProcessName: schtasks.exe
        Sigma detected: Browser Started with Remote Debugging
        Source: Process startedAuthor: pH-T (Nextron Systems), Nasreddine Bencherchali (Nextron Systems): Data: Command: "C:\Program Files\Google\Chrome\Application\chrome.exe" --remote-debugging-port=9222 --profile-directory="Default", CommandLine: "C:\Program Files\Google\Chrome\Application\chrome.exe" --remote-debugging-port=9222 --profile-directory="Default", CommandLine|base64offset|contains: ^", Image: C:\Program Files\Google\Chrome\Application\chrome.exe, NewProcessName: C:\Program Files\Google\Chrome\Application\chrome.exe, OriginalFileName: C:\Program Files\Google\Chrome\Application\chrome.exe, ParentCommandLine: "C:\Users\user\Desktop\file.exe", ParentImage: C:\Users\user\Desktop\file.exe, ParentProcessId: 4144, ParentProcessName: file.exe, ProcessCommandLine: "C:\Program Files\Google\Chrome\Application\chrome.exe" --remote-debugging-port=9222 --profile-directory="Default", ProcessId: 1312, ProcessName: chrome.exe
        Sigma detected: Suspicious Schtasks From Env Var Folder
        Source: Process startedAuthor: Florian Roth (Nextron Systems): Data: Command: "C:\Windows\System32\schtasks.exe" /create /tn "ServiceData4" /tr "C:\Users\user\AppData\Local\Temp\/service123.exe" /st 00:01 /du 9800:59 /sc once /ri 1 /f, CommandLine: "C:\Windows\System32\schtasks.exe" /create /tn "ServiceData4" /tr "C:\Users\user\AppData\Local\Temp\/service123.exe" /st 00:01 /du 9800:59 /sc once /ri 1 /f, CommandLine|base64offset|contains: j, Image: C:\Windows\SysWOW64\schtasks.exe, NewProcessName: C:\Windows\SysWOW64\schtasks.exe, OriginalFileName: C:\Windows\SysWOW64\schtasks.exe, ParentCommandLine: "C:\Users\user\Desktop\file.exe", ParentImage: C:\Users\user\Desktop\file.exe, ParentProcessId: 4144, ParentProcessName: file.exe, ProcessCommandLine: "C:\Windows\System32\schtasks.exe" /create /tn "ServiceData4" /tr "C:\Users\user\AppData\Local\Temp\/service123.exe" /st 00:01 /du 9800:59 /sc once /ri 1 /f, ProcessId: 7688, ProcessName: schtasks.exe

        Suricata Signatures

        TimestampSIDSeverityClasstypeSource IPSource PortDestination IPDestination PortProtocol
        2024-11-30T05:00:33.699309+010020543501A Network Trojan was detected192.168.2.449739141.8.197.14680TCP
        2024-11-30T05:00:35.358822+010020543501A Network Trojan was detected192.168.2.449740141.8.197.14680TCP
        2024-11-30T05:00:45.215515+010020543501A Network Trojan was detected192.168.2.449751141.8.197.14680TCP

        Joe Sandbox Signatures

        Click to jump to signature section

        Show All Signature Results

        AV Detection

        barindex
        Antivirus / Scanner detection for submitted sample
        Source: file.exeAvira: detected
        Multi AV Scanner detection for submitted file
        Source: file.exeReversingLabs: Detection: 36%
        AI detected suspicious sample
        Source: Submited SampleIntegrated Neural Analysis Model: Matched 100.0% probability
        Machine Learning detection for sample
        Source: file.exeJoe Sandbox ML: detected