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Windows
Analysis Report
PURCHASED ORDER OF ENG091.exe
Overview
General Information
| Sample name: | PURCHASED ORDER OF ENG091.exe |
| Analysis ID: | 1528882 |
| MD5: | 30ecd7046839af0716977a9ef6047e60 |
| SHA1: | a1f6517726c9dc0f3d588b947e2aaeb4f849f58c |
| SHA256: | 472a703381c8fe89f83b0fe4d7960b0942c5694054ba94dd85c249c4c702e0cd |
| Tags: | exeuser-lowmal3 |
| Infos: |   |
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Detection
FormBook
| Score: | 100 |
| Range: | 0 - 100 |
| Whitelisted: | false |
| Confidence: | 100% |
Signatures
Antivirus / Scanner detection for submitted sample
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
Suricata IDS alerts for network traffic
Yara detected AntiVM3
Yara detected FormBook
AI detected suspicious sample
Allocates memory in foreign processes
C2 URLs / IPs found in malware configuration
Creates multiple autostart registry keys
Drops PE files to the document folder of the user
Drops PE files with a suspicious file extension
Found direct / indirect Syscall (likely to bypass EDR)
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Modifies the prolog of user mode functions (user mode inline hooks)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: CMSTP Execution Process Creation
Sigma detected: Rundll32 Execution Without CommandLine Parameters
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
Uses cmd line tools excessively to alter registry or file data
Uses netsh to modify the Windows network and firewall settings
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)
Checks if Antivirus/Antispyware/Firewall program is installed (via WMI)
Checks if the current process is being debugged
Contains functionality for execution timing, often used to detect debuggers
Contains functionality to access loader functionality (e.g. LdrGetProcedureAddress)
Contains functionality to call native functions
Contains functionality to read the PEB
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Detected potential crypto function
Drops PE files
Enables debug privileges
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
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
May sleep (evasive loops) to hinder dynamic analysis
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
Sigma detected: Direct Autorun Keys Modification
Sigma detected: Execution of Suspicious File Type Extension
Sigma detected: Potential Persistence Attempt Via Run Keys Using Reg.EXE
Uses 32bit PE files
Uses a Windows Living Off The Land Binaries (LOL bins)
Uses code obfuscation techniques (call, push, ret)
Uses reg.exe to modify the Windows registry
Yara signature match
Classification
| Name | Description | Attribution | Blogpost URLs | Link |
|---|---|---|---|---|
| Formbook, Formbo | FormBook contains a unique crypter RunPE that has unique behavioral patterns subject to detection. It was initially called "Babushka Crypter" by Insidemalware. |
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