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Windows
Analysis Report
RN# D7521-RN-00353 REV-2.exe
Overview
General Information
Detection
FormBook
Score: | 96 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Multi AV Scanner detection for submitted file
Yara detected FormBook
AI detected suspicious sample
Binary is likely a compiled AutoIt script file
Found direct / indirect Syscall (likely to bypass EDR)
Machine Learning detection for sample
Maps a DLL or memory area into another process
Queues an APC in another process (thread injection)
Switches to a custom stack to bypass stack traces
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Allocates memory within range which is reserved for system DLLs (kernel32.dll, advapi32.dll, etc)
Checks if the current process is being debugged
Creates a process in suspended mode (likely to inject code)
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
IP address seen in connection with other malware
May sleep (evasive loops) to hinder dynamic analysis
PE file contains more sections than normal
PE file contains sections with non-standard names
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 the installation path of Mozilla Firefox
Sigma detected: Suspicious Copy From or To System Directory
Sigma detected: Uncommon Svchost Parent Process
Uses 32bit PE files
Classification
- System is w7x64
- RN# D7521-RN-00353 REV-2.exe (PID: 3288 cmdline:
"C:\Users\ user\Deskt op\RN# D75 21-RN-0035 3 REV-2.ex e" MD5: 143F37F0DAFE001D882DFCF2F15245A6) - svchost.exe (PID: 3328 cmdline:
"C:\Users\ user\Deskt op\RN# D75 21-RN-0035 3 REV-2.ex e" MD5: 54A47F6B5E09A77E61649109C6A08866) - CuJYYyjxRgkNEt.exe (PID: 1288 cmdline:
"C:\Progra m Files (x 86)\zIpOAE XuBjWYDyHF xrlRaeYZlU hCYwSqtVnz GZvcsOpkG\ CuJYYyjxRg kNEt.exe" MD5: 32B8AD6ECA9094891E792631BAEA9717) - xcopy.exe (PID: 3412 cmdline:
"C:\Window s\SysWOW64 \xcopy.exe " MD5: 361D273773994ED11A6F1E51BBB4277E) - CuJYYyjxRgkNEt.exe (PID: 172 cmdline:
"C:\Progra m Files (x 86)\zIpOAE XuBjWYDyHF xrlRaeYZlU hCYwSqtVnz GZvcsOpkG\ CuJYYyjxRg kNEt.exe" MD5: 32B8AD6ECA9094891E792631BAEA9717) - firefox.exe (PID: 3592 cmdline:
"C:\Progra m Files (x 86)\Mozill a Firefox\ Firefox.ex e" MD5: C2D924CE9EA2EE3E7B7E6A7C476619CA)
- 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. |
⊘No configs have been found
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
Click to see the 4 entries |
System Summary |
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Source: | Author: Florian Roth (Nextron Systems), Markus Neis, Tim Shelton (HAWK.IO), Nasreddine Bencherchali (Nextron Systems): |
Source: | Author: Florian Roth (Nextron Systems): |
Source: | Author: frack113: |
Source: | Author: vburov: |
⊘No Suricata rule has matched
Click to jump to signature section
Show All Signature Results
AV Detection |
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