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Analysis Report Shipping Document PLBL003534.xls
Overview
General Information
Detection
Hidden Macro 4.0 Remcos
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Detected Remcos RAT
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Sigma detected: Remcos
Sigma detected: Scheduled temp file as task from temp location
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
Yara detected AntiVM_3
Yara detected Remcos RAT
.NET source code contains potential unpacker
Bypasses PowerShell execution policy
Contains functionality to capture and log keystrokes
Contains functionality to inject code into remote processes
Contains functionality to register a low level keyboard hook
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Document exploit detected (process start blacklist hit)
Drops PE files to the document folder of the user
Drops PE files with benign system names
Found Excel 4.0 Macro with suspicious formulas
Found abnormal large hidden Excel 4.0 Macro sheet
Found obfuscated Excel 4.0 Macro
Injects a PE file into a foreign processes
Obfuscated command line found
Powershell drops PE file
Sigma detected: Microsoft Office Product Spawning Windows Shell
Uses dynamic DNS services
Uses schtasks.exe or at.exe to add and modify task schedules
Wscript starts Powershell (via cmd or directly)
Allocates memory within range which is reserved for system DLLs (kernel32.dll, advapi32.dll, etc)
Antivirus or Machine Learning detection for unpacked file
Contains functionality for read data from the clipboard
Contains functionality to download and launch executables
Contains functionality to dynamically determine API calls
Contains functionality to enumerate process and check for explorer.exe or svchost.exe (often used for thread injection)
Contains functionality to enumerate running services
Contains functionality to launch a control a shell (cmd.exe)
Contains functionality to query CPU information (cpuid)
Contains functionality to query locales information (e.g. system language)
Contains functionality to read the clipboard data
Contains functionality to shutdown / reboot the system
Contains functionality to simulate mouse events
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
Document contains embedded VBA macros
Drops PE files
Enables debug privileges
Extensive use of GetProcAddress (often used to hide API calls)
Found WSH timer for Javascript or VBS script (likely evasive script)
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
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
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
Potential document exploit detected (performs DNS queries)
Potential document exploit detected (performs HTTP gets)
Potential document exploit detected (unknown TCP traffic)
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)
Uses code obfuscation techniques (call, push, ret)
Uses the keyboard layout for branch decision (may execute only for specific keyboard layouts)
Yara signature match
Classification
Startup |
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Malware Configuration |
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No configs have been found |
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Yara Overview |
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Memory Dumps |
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Source | Rule | Description | Author | Strings |
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JoeSecurity_AntiVM_3 | Yara detected AntiVM_3 | Joe Security | ||
JoeSecurity_Remcos | Yara detected Remcos RAT | Joe Security | ||
JoeSecurity_Remcos | Yara detected Remcos RAT | Joe Security | ||
JoeSecurity_Remcos | Yara detected Remcos RAT | Joe Security | ||
JoeSecurity_Remcos | Yara detected Remcos RAT | Joe Security | ||
Click to see the 22 entries |
Unpacked PEs |
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Source | Rule | Description | Author | Strings |
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JoeSecurity_Remcos | Yara detected Remcos RAT | Joe Security | ||
Remcos_1 | Remcos Payload | kevoreilly |
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REMCOS_RAT_variants | unknown | unknown |
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JoeSecurity_Remcos | Yara detected Remcos RAT | Joe Security | ||
Remcos_1 | Remcos Payload | kevoreilly |
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Click to see the 13 entries |
Sigma Overview |
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System Summary: |
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Sigma detected: Remcos | Show sources |
Source: | Author: Joe Security: |
Sigma detected: Scheduled temp file as task from temp location | Show sources |
Source: | Author: Joe Security: |
Sigma detected: Microsoft Office Product Spawning Windows Shell | Show sources |
Source: | Author: Michael Haag, Florian Roth, Markus Neis: |
Signature Overview |
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Click to jump to signature section
Show All Signature Results
AV Detection: |
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Multi AV Scanner detection for dropped file | Show sources |
Source: | ReversingLabs: | ||
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Yara detected Remcos RAT | Show sources |
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