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Windows
Analysis Report
YSjOEAta07.exe
Overview
General Information
Sample name: | YSjOEAta07.exerenamed because original name is a hash value |
Original sample name: | a16c70f7334f2e73756ea3dc716d70edaf138185d83289bcff6d65d43801408e.exe |
Analysis ID: | 1528155 |
MD5: | eb0f7c655c78976889355aa35a43dd38 |
SHA1: | 42238019d0febe523faa8b9d851292090ac9a409 |
SHA256: | a16c70f7334f2e73756ea3dc716d70edaf138185d83289bcff6d65d43801408e |
Tags: | exeFormbookuser-adrian__luca |
Infos: | |
Detection
FormBook
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Antivirus / Scanner detection for submitted sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Yara detected FormBook
AI detected suspicious sample
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)
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)
Writes to foreign memory regions
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
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
Internet Provider seen in connection with other malware
May sleep (evasive loops) to hinder dynamic analysis
PE file contains an invalid checksum
Sample execution stops while process was sleeping (likely an evasion)
Sigma detected: Uncommon Svchost Parent Process
Uses 32bit PE files
Uses code obfuscation techniques (call, push, ret)
Yara signature match
Classification
- System is w10x64
- YSjOEAta07.exe (PID: 7728 cmdline:
"C:\Users\ user\Deskt op\YSjOEAt a07.exe" MD5: EB0F7C655C78976889355AA35A43DD38) - svchost.exe (PID: 7828 cmdline:
"C:\Users\ user\Deskt op\YSjOEAt a07.exe" MD5: 1ED18311E3DA35942DB37D15FA40CC5B) - GmuPchEfAM.exe (PID: 1672 cmdline:
"C:\Progra m Files (x 86)\nAEwFN jrDKmEnHYe vQyBsADnPX AqBgVjtCsI wACn\GmuPc hEfAM.exe" MD5: 32B8AD6ECA9094891E792631BAEA9717) - replace.exe (PID: 7900 cmdline:
"C:\Window s\SysWOW64 \replace.e xe" MD5: A7F2E9DD9DE1396B1250F413DA2F6C08) - GmuPchEfAM.exe (PID: 6568 cmdline:
"C:\Progra m Files (x 86)\nAEwFN jrDKmEnHYe vQyBsADnPX AqBgVjtCsI wACn\GmuPc hEfAM.exe" MD5: 32B8AD6ECA9094891E792631BAEA9717) - firefox.exe (PID: 7296 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 11 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: vburov: |
⊘No Suricata rule has matched
Click to jump to signature section
Show All Signature Results
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Source: | Code function: | 4_2_0014C230 |
Source: | Code function: | 4_2_00139AD0 | |
Source: | Code function: | 4_2_009304E8 | |
Source: | Code function: | 8_2_050EB5F3 | |
Source: | Code function: | 8_2_050F0B07 |
Networking |
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