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Windows
Analysis Report
Halkbank_Ekstre_20191102_073809_405251-PDF.com.exe
Overview
General Information
Detection
FormBook
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Multi AV Scanner detection for submitted file
Yara detected FormBook
Malicious sample detected (through community Yara rule)
System process connects to network (likely due to code injection or exploit)
Detected unpacking (changes PE section rights)
Antivirus detection for URL or domain
Multi AV Scanner detection for domain / URL
Snort IDS alert for network traffic
Sample uses process hollowing technique
Tries to steal Mail credentials (via file / registry access)
Maps a DLL or memory area into another process
Machine Learning detection for sample
Performs DNS queries to domains with low reputation
Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
Queues an APC in another process (thread injection)
Modifies the context of a thread in another process (thread injection)
Tries to harvest and steal browser information (history, passwords, etc)
Uses 32bit PE files
Yara signature match
Antivirus or Machine Learning detection for unpacked file
Contains functionality to check if a debugger is running (IsDebuggerPresent)
May sleep (evasive loops) to hinder dynamic analysis
Contains functionality to shutdown / reboot the system
Uses code obfuscation techniques (call, push, ret)
Internet Provider seen in connection with other malware
Detected potential crypto function
Found potential string decryption / allocating functions
Sample execution stops while process was sleeping (likely an evasion)
Found evasive API chain (may stop execution after checking a module file name)
Contains functionality to call native functions
Contains functionality to dynamically determine API calls
HTTP GET or POST without a user agent
Contains functionality which may be used to detect a debugger (GetProcessHeap)
IP address seen in connection with other malware
Contains functionality for execution timing, often used to detect debuggers
Enables debug privileges
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Drops PE files
Contains functionality to read the PEB
Uses a known web browser user agent for HTTP communication
Checks if the current process is being debugged
Found large amount of non-executed APIs
Creates a process in suspended mode (likely to inject code)
Contains functionality to access loader functionality (e.g. LdrGetProcedureAddress)
Contains functionality for read data from the clipboard
Classification
- System is w10x64
- Halkbank_Ekstre_20191102_073809_405251-PDF.com.exe (PID: 5472 cmdline:
C:\Users\u ser\Deskto p\Halkbank _Ekstre_20 191102_073 809_405251 -PDF.com.e xe MD5: 17FBFA2805B6DEAE6B93596EB05E79C5) - xuylbr.exe (PID: 5796 cmdline:
"C:\Users\ user\AppDa ta\Local\T emp\xuylbr .exe" C:\U sers\user\ AppData\Lo cal\Temp\f omwovs.enf MD5: 96A17D5334B1A3F2773F163E41DD53CF) - conhost.exe (PID: 5736 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496) - xuylbr.exe (PID: 3520 cmdline:
C:\Users\u ser\AppDat a\Local\Te mp\xuylbr. exe MD5: 96A17D5334B1A3F2773F163E41DD53CF) - explorer.exe (PID: 3452 cmdline:
C:\Windows \Explorer. EXE MD5: AD5296B280E8F522A8A897C96BAB0E1D) - cmd.exe (PID: 1764 cmdline:
C:\Windows \SysWOW64\ cmd.exe MD5: F3BDBE3BB6F734E357235F4D5898582D)
- 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 |
| |
Formbook_1 | autogenerated rule brought to you by yara-signator | Felix Bilstein - yara-signator at cocacoding dot com |
| |
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
Windows_Trojan_Formbook_1112e116 | unknown | unknown |
| |
Click to see the 13 entries |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
Windows_Trojan_Formbook_1112e116 | unknown | unknown |
| |
Formbook_1 | autogenerated rule brought to you by yara-signator | Felix Bilstein - yara-signator at cocacoding dot com |
| |
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
Windows_Trojan_Formbook_1112e116 | unknown | unknown |
| |
Click to see the 1 entries |
⊘No Sigma rule has matched
Timestamp: | 192.168.2.38.8.8.862704532023883 02/21/23-14:16:34.287497 |
SID: | 2023883 |
Source Port: | 62704 |
Destination Port: | 53 |
Protocol: | UDP |
Classtype: | Potentially Bad Traffic |
Click to jump to signature section
Show All Signature Results
AV Detection |
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Source: | Virustotal: | Perma Link |
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Source: | Virustotal: | Perma Link |
Source: | Joe Sandbox ML: |
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Source: | Code function: | 0_2_00405D74 | |
Source: | Code function: | 0_2_0040699E | |
Source: | Code function: | 0_2_0040290B |
Networking |
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Source: | Network Connect: | Jump to behavior | ||
Source: | Network Connect: | Jump to behavior | ||
Source: | Network Connect: | Jump to behavior | ||
Source: | Domain query: | |||
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Source: | HTTP traffic detected: |
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