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Windows
Analysis Report
opp.scr.exe
Overview
General Information
Detection
FormBook
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Snort IDS alert for network traffic
Yara detected FormBook
.NET source code references suspicious native API functions
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
Queues an APC in another process (thread injection)
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)
Binary contains a suspicious time stamp
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 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
JA3 SSL client fingerprint 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
Stores files to the Windows start menu directory
Uses 32bit PE files
Uses code obfuscation techniques (call, push, ret)
Uses insecure TLS / SSL version for HTTPS connection
Yara signature match
Classification
- System is w10x64
- opp.scr.exe (PID: 412 cmdline:
"C:\Users\ user\Deskt op\opp.scr .exe" MD5: F7C26F0B2088E0324B019C534686B257) - opp.scr.exe (PID: 2468 cmdline:
"C:\Users\ user\Deskt op\opp.scr .exe" MD5: F7C26F0B2088E0324B019C534686B257) - oOOsxwAhjIw.exe (PID: 6716 cmdline:
"C:\Progra m Files (x 86)\IbZIyG TNRRgnjGfK KCjfPwQYwy fKGixnBYPX dPAqeWGGHE s\oOOsxwAh jIw.exe" MD5: 32B8AD6ECA9094891E792631BAEA9717) - dfrgui.exe (PID: 7780 cmdline:
"C:\Window s\SysWOW64 \dfrgui.ex e" MD5: 1167953AFDD83E704CE79B8814E54D69) - oOOsxwAhjIw.exe (PID: 6844 cmdline:
"C:\Progra m Files (x 86)\IbZIyG TNRRgnjGfK KCjfPwQYwy fKGixnBYPX dPAqeWGGHE s\oOOsxwAh jIw.exe" MD5: 32B8AD6ECA9094891E792631BAEA9717) - firefox.exe (PID: 8080 cmdline:
"C:\Progra m Files\Mo zilla Fire fox\Firefo x.exe" MD5: C86B1BE9ED6496FE0E0CBE73F81D8045)
- chrome.exe (PID: 1868 cmdline:
"C:\Progra m Files\Go ogle\Chrom e\Applicat ion\chrome .exe" --st art-maximi zed --sing le-argumen t http:/// MD5: 45DE480806D1B5D462A7DDE4DCEFC4E4) - chrome.exe (PID: 4332 cmdline:
"C:\Progra m Files\Go ogle\Chrom e\Applicat ion\chrome .exe" --ty pe=utility --utility -sub-type= network.mo jom.Networ kService - -lang=en-U S --servic e-sandbox- type=none --mojo-pla tform-chan nel-handle =2052 --fi eld-trial- handle=194 0,i,106875 0171921160 6552,13801 3768088272 17908,2621 44 --disab le-feature s=Optimiza tionGuideM odelDownlo ading,Opti mizationHi nts,Optimi zationHint sFetching, Optimizati onTargetPr ediction / prefetch:8 MD5: 45DE480806D1B5D462A7DDE4DCEFC4E4)
- 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 |
---|---|---|---|---|
MALWARE_Win_DLInjector02 | Detects downloader injector | ditekSHen |
| |
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 |
| |
Click to see the 10 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 |
| |
MALWARE_Win_DLInjector02 | Detects downloader injector | ditekSHen |
| |
Click to see the 5 entries |
⊘No Sigma rule has matched
Timestamp: | 05/02/24-15:57:10.974353 |
SID: | 2855465 |
Source Port: | 49728 |
Destination Port: | 80 |
Protocol: | TCP |
Classtype: | A Network Trojan was detected |
Click to jump to signature section
Show All Signature Results
AV Detection |
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Source: | Virustotal: | Perma Link |
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Networking |
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