MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 4f265eabdee6fb005c5c5d097c8ac58f083ec1c8fccce642960eff90fd9d799f. 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: 13
| SHA256 hash: | 4f265eabdee6fb005c5c5d097c8ac58f083ec1c8fccce642960eff90fd9d799f |
|---|---|
| SHA3-384 hash: | 385aeb648fb184bb408997c547294036297570aa2d4088d2440ddc1a254384a013019dbf7e7b986d14e2c5f8167d8250 |
| SHA1 hash: | 32ab2b024658a7d1c30a9ea9fc9663a60d0cfb0e |
| MD5 hash: | b84bc20a83da7ba5134d34ff887d364a |
| humanhash: | hotel-uranus-papa-kilo |
| File name: | 4f265eabdee6fb005c5c5d097c8ac58f083ec1c8fccce642960eff90fd9d799f |
| Download: | download sample |
| Signature | Formbook |
| File size: | 1'423'872 bytes |
| First seen: | 2026-09-10 10:48:48 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (49'233 x AgentTesla, 20'488 x Formbook, 12'372 x SnakeKeylogger) |
| ssdeep | 24576:a+y3UKdCn4U581VdJvGjyTA0r7f56GJE398xYsuqiK3jS6HlZF:an8N61lTTA03f5PSOx3uPKThFZF |
| TLSH | T16B659D4023A8DF06F0BA4BF159B6D9704BB43C5BA9A8C20A4ED768EF7675F045D40B63 |
| 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 |
| dhash icon | d4f0e8c8ccccf0d4 (2 x Formbook, 1 x PhantomStealer, 1 x AgentTesla) |
| Reporter |  adrian__luca |
| Tags: | exe FormBook |
Intelligence
File Origin
# of uploads :
1
# of downloads :
58
Origin country :
HUVendor Threat Intelligence
No detections
Malware family:
n/a
ID:
1
File name:
exe
Verdict:
No threats detected
Analysis date:
2026-09-10 12:56:28 UTC
Tags:
netreactor
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Launching a service
Сreating synchronization primitives
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)
Verdict:
Malicious
Labled as:
Trojan.Generic
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-08-19T02:53:00Z UTC
Last seen:
2026-09-02T03:40:00Z UTC
Hits:
~100
Malware family:
Formbook
Verdict:
Malicious
Score:
100%
Verdict:
Malware
File Type:
PE
Gathering data
Threat name:
ByteCode-MSIL.Backdoor.FormBook
Status:
Malicious
First seen:
2026-08-19 09:46:47 UTC
File Type:
PE (.Net Exe)
Extracted files:
12
AV detection:
25 of 36 (69.44%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
Formbook
Result
Malware family:
formbook
Score:
10/10
Tags:
family:formbook discovery rat spyware stealer trojan
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Program crash
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Family: Formbook
Formbook payload
Unpacked files
SH256 hash:
4f265eabdee6fb005c5c5d097c8ac58f083ec1c8fccce642960eff90fd9d799f
MD5 hash:
b84bc20a83da7ba5134d34ff887d364a
SHA1 hash:
32ab2b024658a7d1c30a9ea9fc9663a60d0cfb0e
SH256 hash:
68197e163f2ab9619549d95722987769004a9826cc5d0c79b7f0c01e39e39324
MD5 hash:
4e7cc70a88000708f60e816bf3809a8f
SHA1 hash:
14f69444c0d0ac624316606d7c086c8c942441db
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
SH256 hash:
5655d667e4c9c096a3cc0735c614158f9cbcd53226c7a71e6c504be4371a57c4
MD5 hash:
5005fb04efbcf117be55e9471d994f89
SHA1 hash:
db145de35f5cf97b819e87ee290d21a3395b5623
Detections:
SUSP_OBF_NET_Reactor_Indicators_Jan24
SH256 hash:
fe0a9c5940db96687086393d0e620b4a15e07d1e1e912a54167d846637ce8ae9
MD5 hash:
098a30ac7e22920446a41f6fb0a8df4b
SHA1 hash:
aee4c020509227ffbd5c89ab674ce0f8b9f44d76
Malware family:
FormBook
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.45
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.
Comments
Login required
You need to login to in order to write a comment. Login with your abuse.ch account.