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Windows
Analysis Report
SOA SIL TL382920.exe
Overview
General Information
Detection
FormBook
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Malicious sample detected (through community Yara rule)
Yara detected AntiVM3
Yara detected FormBook
.NET source code contains potential unpacker
Found direct / indirect Syscall (likely to bypass EDR)
Injects a PE file into a foreign processes
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)
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)
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
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
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
Uses 32bit PE files
Uses code obfuscation techniques (call, push, ret)
Yara signature match
Classification
- System is w10x64native
- SOA SIL TL382920.exe (PID: 7820 cmdline:
"C:\Users\ user\Deskt op\SOA SIL TL382920. exe" MD5: CAEC46AAACE8E50A9763DFFC6C4ACF0E) - SOA SIL TL382920.exe (PID: 7908 cmdline:
"C:\Users\ user\Deskt op\SOA SIL TL382920. exe" MD5: CAEC46AAACE8E50A9763DFFC6C4ACF0E) - RAVCpl64.exe (PID: 6744 cmdline:
"C:\Progra m Files\Re altek\Audi o\HDA\RAVC pl64.exe" -s MD5: 731FB4B2E5AFBCADAABB80D642E056AC) - replace.exe (PID: 7220 cmdline:
"C:\Window s\SysWOW64 \replace.e xe" MD5: 82B9440BF8D788460BE2FDD73C324659) - MBLUUsWuClSd.exe (PID: 580 cmdline:
"C:\Progra m Files (x 86)\VpYsnf bFknITiAgr VTGVAGPEJl BjDtgJYuqj UdKiDtiFby XeCTqJbaCK YmjFsscwE\ MBLUUsWuCl Sd.exe" MD5: 32B8AD6ECA9094891E792631BAEA9717) - firefox.exe (PID: 3176 cmdline:
"C:\Progra m Files\Mo zilla Fire fox\Firefo x.exe" MD5: 7B12552FD2A5948256B20EC97B708F94)
- 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 8 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 |
|
⊘No Sigma rule has matched
⊘No Suricata rule has matched
Click to jump to signature section
Show All Signature Results
AV Detection |
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Source: | Code function: | 4_2_028CC240 |
Source: | Code function: | 4_2_028B9A70 | |
Source: | Code function: | 4_2_030604E0 |
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