MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 b9a3499ffd979b0fb70199be7ce2f4bd2a93b42ca09408cf371cdbee29695707. 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: | b9a3499ffd979b0fb70199be7ce2f4bd2a93b42ca09408cf371cdbee29695707 |
|---|---|
| SHA3-384 hash: | 5aaf2029c7da78fe1f9f9fded3386bd8a0ed6c30ea1ae8da1327e4e7544813e81e9bfb4970c835308367eb13b53fe56a |
| SHA1 hash: | c235c2ff6399fb47fa21a2e65a08cdc077c746c0 |
| MD5 hash: | 1af230019baadb202a6410555a2e6d68 |
| humanhash: | delta-fish-spring-autumn |
| File name: | b9a3499ffd979b0fb70199be7ce2f4bd2a93b42ca09408cf371cdbee29695707 |
| Download: | download sample |
| Signature | Formbook |
| File size: | 1'081'344 bytes |
| First seen: | 2026-07-07 14:13:55 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (49'122 x AgentTesla, 20'134 x Formbook, 12'360 x SnakeKeylogger) |
| ssdeep | 24576:1r+Q/gd/1lXnX13TskyJ38wkGCOKHk+DOPsa44SZ:J+4gd/1lH13Ts7hkGCO3IO |
| Threatray | 327 similar samples on MalwareBazaar |
| TLSH | T1713512A81B66EA07C9590B782EB1F17816BC2FDEB411D2195FD9BDEBB936F010C04253 |
| 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 :
72
Origin country :
HUVendor Threat Intelligence
Malware configuration found for:
RoboSki
Details
Detection:
Formbook
Verdict:
Malicious
Score:
94.9%
Tags:
micro shell spawn
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Creating a process with a hidden window
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
Creating a file in the %temp% directory
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)
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Adding an exclusion to Microsoft Defender
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
packed
Verdict:
Malicious
Labled as:
Trojan.Generic
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-06-10T07:39:00Z UTC
Last seen:
2026-07-07T23:48:00Z UTC
Hits:
~100
Verdict:
Unknown
Score:
100%
Verdict:
Malware
File Type:
PE
Gathering data
Threat name:
Win32.Backdoor.FormBook
Status:
Malicious
First seen:
2026-06-10 12:18:10 UTC
File Type:
PE (.Net Exe)
Extracted files:
4
AV detection:
19 of 24 (79.17%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
formbook
Similar samples:
+ 317 additional samples on MalwareBazaar
Result
Malware family:
formbook
Score:
10/10
Tags:
family:formbook discovery execution persistence 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
Adds Run key to start application
Checks computer location settings
Executes dropped EXE
Command and Scripting Interpreter: PowerShell
Family: Formbook
Formbook payload
Unpacked files
SH256 hash:
b9a3499ffd979b0fb70199be7ce2f4bd2a93b42ca09408cf371cdbee29695707
MD5 hash:
1af230019baadb202a6410555a2e6d68
SHA1 hash:
c235c2ff6399fb47fa21a2e65a08cdc077c746c0
SH256 hash:
88022622545291b244216b0abe2cb3fe83f4c9079a47bd615494a142e8c28a9f
MD5 hash:
c5e9e912a0d5c276aa3f9e95b46e6e1b
SHA1 hash:
06e5cfcdbdcf07d8509893f07f133b6281076751
SH256 hash:
9777d68ab0761714b22da0595987a73e089f5049956d2fd18c21bf462f89b722
MD5 hash:
29a3185ab95a081c6d055eafb4bab274
SHA1 hash:
8e2b118850d42ffb5656c34ccbb59ba8c1d4b723
SH256 hash:
ca1fe5747d60c8abe99091ef75682a2682521d46e93d71a1bdaddc95685f7791
MD5 hash:
aca9d154d5241052ffdd3d7d1bbfe97e
SHA1 hash:
1aa42e70e2d06bbbd263bf2bd6357c5c37e7b281
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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