MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 657331c8ca354ae9b7dca3ddbbd34b434705bc097727141f4e88bbce68b8f573. 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: | 657331c8ca354ae9b7dca3ddbbd34b434705bc097727141f4e88bbce68b8f573 |
|---|---|
| SHA3-384 hash: | 5b3c9c7e4feebba66512eaf8cc77dd62fc65d00f5a8873a15b09cbe69c2ccc50a677c62ced8bc51787ad6db5443c0e79 |
| SHA1 hash: | dbdcd1f7a4ceb99c7a81e4b1c2b1214ae32a91d3 |
| MD5 hash: | ab5757fc8c1046fc6e5d5d05565f2e27 |
| humanhash: | princess-lake-paris-uncle |
| File name: | RFQ_QA706724.TAR002-QA800619_SUPPLY_&_FABRICATION_OF_L-SQUARE_45_DEGREE_&_90_DEGREE-_MAT'L_GR.exe |
| Download: | download sample |
| Signature | Formbook |
| File size: | 1'188'864 bytes |
| First seen: | 2026-05-20 17:45:50 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 91d07a5e22681e70764519ae943a5883 (144 x Formbook, 35 x AgentTesla, 32 x a310Logger) |
| ssdeep | 24576:Ktb20pkaCqT5TBWgNQ7al29btaQ6XA26A:3Vg5tQ7al27aQ0X5 |
| Threatray | 2'757 similar samples on MalwareBazaar |
| TLSH | T1EF45C01273DD8365C3B25273BA65B701BEBB7C2506B5F46B2FD8093DE820122525EA73 |
| TrID | 29.5% (.EXE) Win64 Executable (generic) (6522/11/2) 22.8% (.EXE) Win16 NE executable (generic) (5038/12/1) 20.3% (.EXE) Win32 Executable (generic) (4504/4/1) 9.1% (.EXE) OS/2 Executable (generic) (2029/13) 9.0% (.EXE) Generic Win/DOS Executable (2002/3) |
| Magika | pebin |
| dhash icon | aae2f3e38383b629 (2'698 x Formbook, 1'203 x CredentialFlusher, 928 x AgentTesla) |
| Reporter |  TomU |
| Tags: | exe FormBook |
Intelligence
File Origin
# of uploads :
1
# of downloads :
70
Origin country :
CHVendor Threat Intelligence
Malware configuration found for:
AutoIt
AutoStones
FormBook
Details
AutoIt
extracted scripts and files
AutoStones
the names of side-loaded components and, if available from processing of a parent file, the deobfuscated components
FormBook
a decrypted component and its RC4 key
Malware family:
n/a
ID:
1
File name:
exe
Verdict:
No threats detected
Analysis date:
2026-05-21 00:54:24 UTC
Tags:
n/a
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Detection(s):
Verdict:
Malicious
Score:
99.1%
Tags:
autoit emotet
Result
Verdict:
Clean
Maliciousness:
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
adaptive-context anti-debug autoit compiled-script evasive fingerprint installer-heuristic keylogger lolbin microsoft_visual_cc msconfig packed reconnaissance regedit similar-threat
Verdict:
Malicious
Labled as:
Trojan.Generic
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-07-07T03:01:00Z UTC
Last seen:
2026-02-18T03:55:00Z UTC
Hits:
~100
Malware family:
Formbook
Verdict:
Malicious
Score:
100%
Verdict:
Malware
File Type:
PE
Gathering data
Threat name:
Win32.Trojan.AutoitInject
Status:
Malicious
First seen:
2025-07-07 05:33:45 UTC
File Type:
PE (Exe)
Extracted files:
28
AV detection:
26 of 38 (68.42%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
formbook
autoit
unc_loader_036
Similar samples:
+ 2'747 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
Family: Formbook
Formbook payload
Unpacked files
SH256 hash:
657331c8ca354ae9b7dca3ddbbd34b434705bc097727141f4e88bbce68b8f573
MD5 hash:
ab5757fc8c1046fc6e5d5d05565f2e27
SHA1 hash:
dbdcd1f7a4ceb99c7a81e4b1c2b1214ae32a91d3
SH256 hash:
ea9537709e35d5f2dc90e157596ca14a91b1e9598b31c4658d4c4e6a9a54c64a
MD5 hash:
dcecd2310f4bdb4328fc7666e4c944a3
SHA1 hash:
a33bda558e77a3c0ba4a37b3883d92105b5029ee
SH256 hash:
d34401aee0204328f287a14bf601d26851b77dab198c01d75c355af957213027
MD5 hash:
49e7d109686361b8c47dbe557301d897
SHA1 hash:
4325b97e6231681334eb229b0c8cc354c03b1af4
Detections:
win_formbook_g0
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: | 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_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: | meth_stackstrings |
|---|---|
| Author: | Willi Ballenthin |
| 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_AntiVM_MassHunt_Win_Malware_2026_CYFARE |
|---|---|
| Author: | CYFARE |
| Description: | Detects Windows malware employing anti-VM / anti-sandbox evasion techniques across VMware, VirtualBox, Hyper-V, QEMU, Xen, and generic sandbox environments |
| Reference: | https://cyfare.net/ |
| Rule name: | TH_Generic_MassHunt_Win_Malware_2025_CYFARE |
|---|---|
| Author: | CYFARE |
| Description: | Generic Windows malware mass-hunt rule - 2025 |
| Reference: | https://cyfare.net/ |
| Rule name: | VECT_Ransomware |
|---|---|
| Author: | Mustafa Bakhit |
| Description: | Detects activity associated with VECT ransomware. This includes registry modifications and deletions, execution of system and defense-evasion commands, suspicious API usage, mutex creation, file and memory manipulation, ransomware note generation, anti-debugging and anti-analysis techniques, and embedded cryptographic constants (SHA256) characteristic of this malware family. Designed for threat intelligence and malware detection environments. |
| Rule name: | YahLover |
|---|---|
| Author: | Kevin Falcoz |
| Description: | YahLover |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Malspam
Delivery method
Distributed via e-mail attachment
Comments
Login required
You need to login to in order to write a comment. Login with your abuse.ch account.