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Windows
Analysis Report
fJuwM4Bwi7.exe
Overview
General Information
Detection
FormBook, GuLoader
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for submitted file
Yara detected FormBook
Yara detected GuLoader
Found direct / indirect Syscall (likely to bypass EDR)
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)
Queues an APC in another process (thread injection)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Checks if the current process is being debugged
Contains functionality for execution timing, often used to detect debuggers
Contains functionality for read data from the clipboard
Contains functionality to access loader functionality (e.g. LdrGetProcedureAddress)
Contains functionality to call native functions
Contains functionality to dynamically determine API calls
Contains functionality to read the PEB
Contains functionality to shutdown / reboot the system
Creates a process in suspended mode (likely to inject code)
Detected potential crypto function
Drops PE files
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Found dropped PE file which has not been started or loaded
Found large amount of non-executed APIs
Found potential string decryption / allocating functions
IP address seen in connection with other malware
JA3 SSL client fingerprint seen in connection with other malware
May sleep (evasive loops) to hinder dynamic analysis
Sample execution stops while process was sleeping (likely an evasion)
Sample file is different than original file name gathered from version info
Uses 32bit PE files
Uses code obfuscation techniques (call, push, ret)
Yara signature match
Classification
- System is w10x64native
- fJuwM4Bwi7.exe (PID: 8852 cmdline:
"C:\Users\ user\Deskt op\fJuwM4B wi7.exe" MD5: 0CB5485C0840CF976767BC45FB0B45D4) - fJuwM4Bwi7.exe (PID: 3344 cmdline:
"C:\Users\ user\Deskt op\fJuwM4B wi7.exe" MD5: 0CB5485C0840CF976767BC45FB0B45D4) - SLePhgUCFUcrYZVod.exe (PID: 2444 cmdline:
"C:\Progra m Files (x 86)\vkkmQg eVChFWDAaY JODeNaycsA xpfdiaHFsp XdJfCmTsgE xhz\SLePhg UCFUcrYZVo d.exe" MD5: 32B8AD6ECA9094891E792631BAEA9717) - secinit.exe (PID: 5436 cmdline:
"C:\Window s\SysWOW64 \secinit.e xe" MD5: 3B4B8DB765C75B8024A208AE6915223C) - SLePhgUCFUcrYZVod.exe (PID: 2980 cmdline:
"C:\Progra m Files (x 86)\vkkmQg eVChFWDAaY JODeNaycsA xpfdiaHFsp XdJfCmTsgE xhz\SLePhg UCFUcrYZVo d.exe" MD5: 32B8AD6ECA9094891E792631BAEA9717) - firefox.exe (PID: 9140 cmdline:
"C:\Progra m Files\Mo zilla Fire fox\Firefo x.exe" MD5: D1CC73370B9EF7D74E6D9FD9248CD687)
- cleanup
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. |
Name | Description | Attribution | Blogpost URLs | Link |
---|---|---|---|---|
CloudEyE, GuLoader | CloudEyE (initially named GuLoader) is a small VB5/6 downloader. It typically downloads RATs/Stealers, such as Agent Tesla, Arkei/Vidar, Formbook, Lokibot, Netwire and Remcos, often but not always from Google Drive. The downloaded payload is xored. | No Attribution |
⊘No configs have been found
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
Windows_Trojan_Formbook_1112e116 | unknown | unknown |
| |
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
Windows_Trojan_Formbook_1112e116 | unknown | unknown |
| |
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
Click to see the 10 entries |
⊘No Sigma rule has matched
⊘No Snort rule has matched
Click to jump to signature section
Show All Signature Results
AV Detection |
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Source: | Virustotal: | Perma Link |
Source: | ReversingLabs: | |||
Source: | Virustotal: | Perma Link |
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Source: | Code function: | 5_2_0040603A | |
Source: | Code function: | 5_2_004055F6 | |
Source: | Code function: | 5_2_00402645 |
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