MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 b3e42037f5cdb5966eb77da291f3234a7cfcd111bfb1a50da7bc3d98da779400. 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: 16
| SHA256 hash: | b3e42037f5cdb5966eb77da291f3234a7cfcd111bfb1a50da7bc3d98da779400 |
|---|---|
| SHA3-384 hash: | 800f22c9ab751e8fc9e64db29eddd8f13a38011ca0b57d5ef38b2d3684a71226ff51092f282cc3557345dd63565c2374 |
| SHA1 hash: | 8f745b1ff3cb1ae0ccf893147d98de1c5d527559 |
| MD5 hash: | 89bfe557f9354a190398f3bb80cf42da |
| humanhash: | hawaii-august-undress-may |
| File name: | b3e42037f5cdb5966eb77da291f3234a7cfcd111bfb1a50da7bc3d98da779400 |
| Download: | download sample |
| Signature | Formbook |
| File size: | 1'252'864 bytes |
| First seen: | 2025-10-10 06:30:07 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 1895460fffad9475fda0c84755ecfee1 (338 x Formbook, 83 x AgentTesla, 56 x a310Logger) |
| ssdeep | 24576:W5EmXFtKaL4/oFe5T9yyXYfP1ijXdaWo4/x9v585h+OsLsF:WPVt/LZeJbInQRaWo4pfh |
| Threatray | 1'968 similar samples on MalwareBazaar |
| TLSH | T11E45CF027391D062FFAB92334F5AF6115BBC79260123AA2F13981D79BD701B1563E7A3 |
| TrID | 40.3% (.EXE) Win64 Executable (generic) (10522/11/4) 19.3% (.EXE) Win16 NE executable (generic) (5038/12/1) 17.2% (.EXE) Win32 Executable (generic) (4504/4/1) 7.7% (.EXE) OS/2 Executable (generic) (2029/13) 7.6% (.EXE) Generic Win/DOS Executable (2002/3) |
| Magika | pebin |
| Reporter |  adrian__luca |
| Tags: | exe FormBook |
Intelligence
File Origin
# of uploads :
1
# of downloads :
66
Origin country :
HUVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
b3e42037f5cdb5966eb77da291f3234a7cfcd111bfb1a50da7bc3d98da779400
Verdict:
No threats detected
Analysis date:
2025-10-10 07:35:06 UTC
Tags:
n/a
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Verdict:
Malicious
Score:
96.5%
Tags:
autoit emotet
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Creating a file in the %temp% directory
Launching a process
Unauthorized injection to a system process
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
adaptive-context autoit compiled-script fingerprint keylogger lolbin microsoft_visual_cc obfuscated packed packed packer_detected reg regsvr32 threat wscript
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-09-14T19:53:00Z UTC
Last seen:
2025-10-12T02:04:00Z UTC
Hits:
~1000
Malware family:
Formbook
Verdict:
Malicious
Score:
100%
Verdict:
Malware
File Type:
PE
Gathering data
Threat name:
Win32.Trojan.AutoitInject
Status:
Malicious
First seen:
2025-09-14 22:57:22 UTC
File Type:
PE (Exe)
Extracted files:
28
AV detection:
27 of 34 (79.41%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
formbook
Similar samples:
+ 1'958 additional samples on MalwareBazaar
Result
Malware family:
formbook
Score:
10/10
Tags:
family:formbook discovery rat spyware stealer trojan
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Program crash
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Formbook payload
Formbook
Formbook family
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Unpacked files
SH256 hash:
b3e42037f5cdb5966eb77da291f3234a7cfcd111bfb1a50da7bc3d98da779400
MD5 hash:
89bfe557f9354a190398f3bb80cf42da
SHA1 hash:
8f745b1ff3cb1ae0ccf893147d98de1c5d527559
SH256 hash:
9d769a196b71ed5bf347119aadd3d86c79dc9c2403bb4b2f0c16813ac89d1925
MD5 hash:
83735b5a241b37717449cdf0a4e0eb89
SHA1 hash:
151cfa837f0d23f0b61053164f5a6e359c4265be
SH256 hash:
c97357a1b47539f1f216ffc5d47f7e3be309bf28c7204444941aa60cbbc493eb
MD5 hash:
82734112bf5e7c730e5c26d4d24222da
SHA1 hash:
de6ede76c5f4977c8471db7f48d7416f7583c5c2
Detections:
win_formbook_g0
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Formbook
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: | AutoIT_Compiled |
|---|---|
| Author: | @bartblaze |
| Description: | Identifies compiled AutoIT script (as EXE). This rule by itself does NOT necessarily mean the detected file is malicious. |
| Rule name: | CP_AllMal_Detector |
|---|---|
| Author: | DiegoAnalytics |
| Description: | CrossPlatform All Malwares Detector: Detect PE, ELF, Mach-O, scripts, archives; overlay, obfuscation, encryption, spoofing, hiding, high entropy, network communication |
| 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__API |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | golang_bin_JCorn_CSC846 |
|---|---|
| Author: | Justin Cornwell |
| Description: | CSC-846 Golang detection ruleset |
| Rule name: | pe_detect_tls_callbacks |
|---|
| Rule name: | pe_no_import_table |
|---|---|
| Description: | Detect pe file that no import table |
| Rule name: | shellcode |
|---|---|
| Author: | nex |
| Description: | Matched shellcode byte patterns |
| Rule name: | Sus_Obf_Enc_Spoof_Hide_PE |
|---|---|
| Author: | XiAnzheng |
| Description: | Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP) |
| Rule name: | TH_Generic_MassHunt_Win_Malware_2025_CYFARE |
|---|---|
| Author: | CYFARE |
| Description: | Generic Windows malware mass-hunt 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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