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Windows Analysis Report
file.exe

Overview

General Information

Sample name:	file.exe
Analysis ID:	1565526
MD5:	08f54694fcdf9433d8f3aa581903c4ca
SHA1:	08d738cc1c80c55c2835b23e24e8e211b4fb437c
SHA256:	3c87e8c4b46af6850934553b22a5bd2d0d1b648938fec52cd2f3b664b1dceb68
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

Found malware configuration

Multi AV Scanner detection for submitted file

Suricata IDS alerts for network traffic

Yara detected Clipboard Hijacker

Yara detected Cryptbot

AI detected suspicious sample

C2 URLs / IPs found in malware configuration

Drops large PE files

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: 1656 cmdline: "C:\Users\user\Desktop\file.exe" MD5: 08F54694FCDF9433D8F3AA581903C4CA)

chrome.exe (PID: 1848 cmdline: "C:\Program Files\Google\Chrome\Application\chrome.exe" --remote-debugging-port=9222 --profile-directory="Default" MD5: 45DE480806D1B5D462A7DDE4DCEFC4E4)

chrome.exe (PID: 5572 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=2420 --field-trial-handle=2360,i,13484378935357473721,8351465032550903243,262144 /prefetch:8 MD5: 45DE480806D1B5D462A7DDE4DCEFC4E4)

service123.exe (PID: 7104 cmdline: "C:\Users\user\AppData\Local\Temp\service123.exe" MD5: 86EC3151861D41F3D21F4C2D13844DCA)

schtasks.exe (PID: 5136 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: 6776 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: 0D698AF330FD17BEE3BF90011D49251D)

WerFault.exe (PID: 5328 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 1656 -s 1296 MD5: C31336C1EFC2CCB44B4326EA793040F2)

service123.exe (PID: 6548 cmdline: C:\Users\user\AppData\Local\Temp\/service123.exe MD5: 86EC3151861D41F3D21F4C2D13844DCA)

service123.exe (PID: 6472 cmdline: C:\Users\user\AppData\Local\Temp\/service123.exe MD5: 86EC3151861D41F3D21F4C2D13844DCA)

service123.exe (PID: 2468 cmdline: C:\Users\user\AppData\Local\Temp\/service123.exe MD5: 86EC3151861D41F3D21F4C2D13844DCA)

service123.exe (PID: 4092 cmdline: C:\Users\user\AppData\Local\Temp\/service123.exe MD5: 86EC3151861D41F3D21F4C2D13844DCA)

cleanup

Malware Threat Intel

Provided by

Name	Description	Attribution	Blogpost URLs	Link
CryptBot	A 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 Attribution	https://any.run/cybersecurity-blog/cryptbot-infostealer-malware-analysis/ https://asec.ahnlab.com/en/24423/ https://asec.ahnlab.com/en/26052/ https://asec.ahnlab.com/en/31683/ https://asec.ahnlab.com/en/31802/	https://malpedia.caad.fkie.fraunhofer.de/details/win.cryptbot

Malware Configuration

Threatname: Cryptbot

{"C2 list": ["home.twentykx20pt.top"]}

Yara Signatures

PCAP (Network Traffic)

Source	Rule	Description	Author	Strings
dump.pcap	JoeSecurity_Cryptbot	Yara detected Cryptbot	Joe Security

Memory Dumps

Source	Rule	Description	Author	Strings
Process Memory Space: service123.exe PID: 7104	JoeSecurity_Clipboard_Hijacker_5	Yara detected Clipboard Hijacker	Joe Security

Unpacked PEs

Source	Rule	Description	Author	Strings
7.2.service123.exe.6c140000.1.unpack	JoeSecurity_Clipboard_Hijacker_5	Yara detected Clipboard Hijacker	Joe Security

Sigma Signatures

System Summary

Sigma detected: Suspicious Scheduled Task Creation Involving Temp Folder

Source: Process started

Author: 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: 1656, 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: 5136, ProcessName: schtasks.exe

Sigma detected: Browser Started with Remote Debugging

Source: Process started

Author: 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: 1656, ParentProcessName: file.exe, ProcessCommandLine: "C:\Program Files\Google\Chrome\Application\chrome.exe" --remote-debugging-port=9222 --profile-directory="Default", ProcessId: 1848, ProcessName: chrome.exe

Sigma detected: Suspicious Schtasks From Env Var Folder

Source: Process started

Suricata Signatures

ET MALWARE Win32/Cryptbotv2 CnC Activity (POST) M4

Timestamp	SID	Severity	Classtype	Source IP	Source Port	Destination IP	Destination Port	Protocol
2024-11-30T05:00:37.164890+0100	2054350	1	A Network Trojan was detected	192.168.2.5	49744	34.118.84.150	80	TCP
2024-11-30T05:00:39.134754+0100	2054350	1	A Network Trojan was detected	192.168.2.5	49750	34.118.84.150	80	TCP
2024-11-30T05:00:48.463111+0100	2054350	1	A Network Trojan was detected	192.168.2.5	49781	34.118.84.150	80	TCP

Joe Sandbox Signatures

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Show All Signature Results

AV Detection

Antivirus / Scanner detection for submitted sample

Source: file.exe

Avira: detected

Found malware configuration

Source: file.exe.1656.0.memstrmin

Malware Configuration Extractor: Cryptbot {"C2 list": ["home.twentykx20pt.top"]}

Multi AV Scanner detection for submitted file

Source: file.exe	ReversingLabs: Detection: 36%
Source: file.exe	Virustotal: Detection: 45%			Perma Link

AI detected suspicious sample

Source: Submited Sample

Integrated Neural Analysis Model: Matched 100.0% probability

Machine Learning detection for sample

Source: file.exe

Joe Sandbox ML: detected

Behavior Section

Behavior Chronological

Disassembly

Uncategorized

Graph

Loading Joe Sandbox Report ...

Warning!

Windows Analysis Report
file.exe

Overview

General Information

Detection

Signatures

Classification

Process Tree

Malware Threat Intel

Malware Configuration

Threatname: Cryptbot

Yara Signatures

PCAP (Network Traffic)

Memory Dumps

Unpacked PEs

Sigma Signatures

System Summary

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Cryptography

Behavior Section

Behavior Chronological

Disassembly

Uncategorized

Graph

Loading Joe Sandbox Report ...

Warning!

Windows Analysis Report file.exe

Overview

General Information

Detection

Signatures

Classification

Process Tree

Malware Threat Intel

Malware Configuration

Threatname: Cryptbot

Yara Signatures

PCAP (Network Traffic)

Memory Dumps

Unpacked PEs

Sigma Signatures

System Summary

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Cryptography

Windows Analysis Report
file.exe