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Windows
Analysis Report
RFQ.exe
Overview
General Information
Detection
FormBook
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Yara detected AntiVM3
Yara detected FormBook
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Adds a directory exclusion to Windows Defender
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
Loading BitLocker PowerShell Module
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)
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Allocates memory with a write watch (potentially for evading sandboxes)
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
Enables debug privileges
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
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
Sigma detected: Powershell Defender Exclusion
Uses 32bit PE files
Uses cacls to modify the permissions of files
Uses code obfuscation techniques (call, push, ret)
Yara signature match
Classification
- System is w10x64
- RFQ.exe (PID: 4464 cmdline:
"C:\Users\ user\Deskt op\RFQ.exe " MD5: 4D82CC1B35B8DC9EC7D149F1B8B95E95) - powershell.exe (PID: 5776 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" Add-MpPref erence -Ex clusionPat h "C:\User s\user\Des ktop\RFQ.e xe" MD5: C32CA4ACFCC635EC1EA6ED8A34DF5FAC) - conhost.exe (PID: 5824 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) - WmiPrvSE.exe (PID: 5000 cmdline:
C:\Windows \system32\ wbem\wmipr vse.exe -s ecured -Em bedding MD5: 60FF40CFD7FB8FE41EE4FE9AE5FE1C51) - RFQ.exe (PID: 3580 cmdline:
"C:\Users\ user\Deskt op\RFQ.exe " MD5: 4D82CC1B35B8DC9EC7D149F1B8B95E95) - KdNqCjDpwdLOuI.exe (PID: 5444 cmdline:
"C:\Progra m Files (x 86)\RVvmUv PEqDlYrrwe VNYYJuvQHg hwCDqplNsw xbXNeTxKBB ugQnGCMhEb IeudCHnXDj dBoYZ\KdNq CjDpwdLOuI .exe" MD5: 32B8AD6ECA9094891E792631BAEA9717) - icacls.exe (PID: 3140 cmdline:
"C:\Window s\SysWOW64 \icacls.ex e" MD5: 2E49585E4E08565F52090B144062F97E) - KdNqCjDpwdLOuI.exe (PID: 2940 cmdline:
"C:\Progra m Files (x 86)\RVvmUv PEqDlYrrwe VNYYJuvQHg hwCDqplNsw xbXNeTxKBB ugQnGCMhEb IeudCHnXDj dBoYZ\KdNq CjDpwdLOuI .exe" MD5: 32B8AD6ECA9094891E792631BAEA9717) - firefox.exe (PID: 1308 cmdline:
"C:\Progra m Files\Mo zilla Fire fox\Firefo x.exe" MD5: C86B1BE9ED6496FE0E0CBE73F81D8045)
- 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 | ||
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 12 entries |
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 |
|
System Summary |
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Source: | Author: Florian Roth (Nextron Systems): |
Source: | Author: Florian Roth (Nextron Systems): |
Source: | Author: Roberto Rodriguez @Cyb3rWard0g (rule), oscd.community (improvements): |
⊘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: |
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Source: | Code function: | 8_2_030DB130 |
Source: | Code function: | 8_2_030C90E0 | |
Source: | Code function: | 8_2_030D16E4 | |
Source: | Code function: | 8_2_030CD4A0 |
Networking |
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