MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 4d137b0f85e967fa77cdc2b07bd869db5b0180d3639aae384bc0eb6f2d740243. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.
Database Entry
Formbook
Vendor detections: 15
| SHA256 hash: | 4d137b0f85e967fa77cdc2b07bd869db5b0180d3639aae384bc0eb6f2d740243 |
|---|---|
| SHA3-384 hash: | a0d88406f5d47da4b17b310a7c4e3902c00842e16c941bce86f9d8f20123d305065c0f242fa20a93555bd1d5b2a22fe1 |
| SHA1 hash: | 3f2d9e93b973e517b9d76678b94dd36b93d6dcc9 |
| MD5 hash: | 47912354b325ff25c2d30010fe23e502 |
| humanhash: | tennessee-tango-iowa-blossom |
| File name: | 4d137b0f85e967fa77cdc2b07bd869db5b0180d3639aae384bc0eb6f2d740243 |
| Download: | download sample |
| Signature | Formbook |
| File size: | 1'027'584 bytes |
| First seen: | 2026-06-08 09:46:08 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (49'066 x AgentTesla, 20'011 x Formbook, 12'352 x SnakeKeylogger) |
| ssdeep | 12288:Jm7GMxlFvqNFfsTnRvWfk3u5lH1jiDG4u93f4mfcNo/p11xg1lR7Y0XCHVky6zpT:talFG0ekAaJYZfcM1xwlFJVzpiB |
| Threatray | 198 similar samples on MalwareBazaar |
| TLSH | T1312512045A1AE607C5D01B794EA1F2B403AD6DEDA500DB07DFEEBEDFB93AA151D04283 |
| TrID | 73.9% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 6.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 6.6% (.EXE) Win64 Executable (generic) (6522/11/2) 4.5% (.EXE) Win32 Executable (generic) (4504/4/1) 2.0% (.ICL) Windows Icons Library (generic) (2059/9) |
| Magika | pebin |
| Reporter |  adrian__luca |
| Tags: | exe FormBook |
Intelligence
File Origin
# of uploads :
1
# of downloads :
47
Origin country :
HUVendor Threat Intelligence
Malware configuration found for:
RoboSki
Details
Detection:
Formbook
Verdict:
Malicious
Score:
99.9%
Tags:
infosteal virus micro msil
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Launching a service
Сreating synchronization primitives
Creating a process with a hidden window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Searching for synchronization primitives
Launching the default Windows debugger (dwwin.exe)
Adding an exclusion to Microsoft Defender
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
crypt packed similar-threat snakekeylogger
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-05-15T08:31:00Z UTC
Last seen:
2026-06-05T18:58:00Z UTC
Hits:
~100
Malware family:
Formbook
Verdict:
Malicious
Score:
100%
Verdict:
Malware
File Type:
PE
Gathering data
Threat name:
Win32.Trojan.SnakeKeylogger
Status:
Malicious
First seen:
2026-05-15 11:34:22 UTC
File Type:
PE (.Net Exe)
Extracted files:
4
AV detection:
23 of 36 (63.89%)
Threat level:
5/5
Verdict:
malicious
Label(s):
xworm
Similar samples:
+ 188 additional samples on MalwareBazaar
Result
Malware family:
formbook
Score:
10/10
Tags:
family:formbook discovery execution rat spyware stealer trojan
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Checks computer location settings
Command and Scripting Interpreter: PowerShell
Family: Formbook
Formbook payload
Unpacked files
SH256 hash:
4d137b0f85e967fa77cdc2b07bd869db5b0180d3639aae384bc0eb6f2d740243
MD5 hash:
47912354b325ff25c2d30010fe23e502
SHA1 hash:
3f2d9e93b973e517b9d76678b94dd36b93d6dcc9
SH256 hash:
4cdc68b0df52092d2fc079049e344ebf34b1ddf06a6daacebcd539bbd411d355
MD5 hash:
e49ead8f3819d175df9962f4ccd9b167
SHA1 hash:
808204d934dd76f2eeb932cdf554b6d8ef1ecaff
SH256 hash:
819c692d6b1cffedbf3d2eac712dc849a04f3fb324e89dadd44a847117b14ddc
MD5 hash:
131c7db8acb50b9908ff59f791f44fe9
SHA1 hash:
a505da86f1bc47fc192b176d8446f9ce7586bb70
SH256 hash:
363ee51fc02f20cb206039434758c3afa1c71bc7d316c6db4a39b0d310ab92f9
MD5 hash:
afe085b7324d72673eef749ff5f21a49
SHA1 hash:
a86f1039a8877804b1b2c99aed91312846cd40e5
Malware family:
FormBook
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
YARA Signatures
MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.
| Rule name: | CP_Script_Inject_Detector |
|---|---|
| Author: | DiegoAnalytics |
| Description: | Detects attempts to inject code into another process across PE, ELF, Mach-O binaries |
| Rule name: | DebuggerCheck__GlobalFlags |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | DebuggerCheck__QueryInfo |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | DebuggerHiding__Active |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | DebuggerHiding__Thread |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | DetectEncryptedVariants |
|---|---|
| Author: | Zinyth |
| Description: | Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded |
| Rule name: | dgaagas |
|---|---|
| Author: | Harshit |
| Description: | Uses certutil.exe to download a file named test.txt |
| Rule name: | golang_bin_JCorn_CSC846 |
|---|---|
| Author: | Justin Cornwell |
| Description: | CSC-846 Golang detection ruleset |
| Rule name: | MD5_Constants |
|---|---|
| Author: | phoul (@phoul) |
| Description: | Look for MD5 constants |
| Rule name: | NET |
|---|---|
| Author: | malware-lu |
| Rule name: | NETexecutableMicrosoft |
|---|---|
| Author: | malware-lu |
| Rule name: | pe_imphash |
|---|
| Rule name: | pe_no_import_table |
|---|---|
| Description: | Detect pe file that no import table |
| Rule name: | RIPEMD160_Constants |
|---|---|
| Author: | phoul (@phoul) |
| Description: | Look for RIPEMD-160 constants |
| Rule name: | SEH__vectored |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | SHA1_Constants |
|---|---|
| Author: | phoul (@phoul) |
| Description: | Look for SHA1 constants |
| Rule name: | shellcode |
|---|---|
| Author: | nex |
| Description: | Matched shellcode byte patterns |
| Rule name: | Skystars_Malware_Imphash |
|---|---|
| Author: | Skystars LightDefender |
| Description: | imphash |
| Rule name: | TH_Win_ETW_Bypass_2025_CYFARE |
|---|---|
| Author: | CYFARE |
| Description: | Windows ETW Bypass Detection Rule - 2025 |
| Reference: | https://cyfare.net/ |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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