MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 b815f365f539b1893fefa15f8b39382b6ec4f249e75b85e348bab807cb989eff. 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: | b815f365f539b1893fefa15f8b39382b6ec4f249e75b85e348bab807cb989eff |
|---|---|
| SHA3-384 hash: | f58860a229136f666124cd94a686a0ee0b7bb4a998500cdeac0032234d6dedfb6404cce13486e8b01190ea6b122d719d |
| SHA1 hash: | a2f23b76ee310567340ca15e03b902bde204a75a |
| MD5 hash: | 479a27aa7b3d867aca97a062b23dcd37 |
| humanhash: | south-mobile-snake-magazine |
| File name: | POtr2012630.exe |
| Download: | download sample |
| Signature | Formbook |
| File size: | 1'213'952 bytes |
| First seen: | 2026-01-30 14:19:22 UTC |
| Last seen: | 2026-02-05 16:15:20 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 279daa640d9140f9842860a738abd363 (23 x Formbook, 2 x CastleLoader, 1 x RemcosRAT) |
| ssdeep | 24576:xqDEvCTbMWu7rQYlBQcBiT6rprG8a8WcttUVavYXGBlZM:xTvC/MTQYxsWR7a8DUVaA2L |
| Threatray | 2'531 similar samples on MalwareBazaar |
| TLSH | T18545BF0273C1D062FFAB92734B5AF6115BBC69260123A61F13981DBEBD701B1563E7A3 |
| 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 |  threatcat_ch |
| Tags: | exe FormBook |
Intelligence
File Origin
# of uploads :
3
# of downloads :
120
Origin country :
CHVendor Threat Intelligence
Malware configuration found for:
AutoIt
AutoStones
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
Malware family:
n/a
ID:
1
File name:
POtr2012630.exe
Verdict:
No threats detected
Analysis date:
2026-01-30 14:22:22 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:
90.2%
Tags:
autoit emotet
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug autoit barys compiled-script fingerprint keylogger microsoft_visual_cc packed
Verdict:
Malicious
Labled as:
Barys.Generic
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-01-30T10:47:00Z UTC
Last seen:
2026-02-01T12:40:00Z UTC
Hits:
~1000
Detections:
Trojan.Win32.Strab.sb Trojan.Win32.Inject.sb Trojan.Win32.Auzenpak.sb Trojan-Spy.Win32.Noon.bpon Trojan.Win32.Agent.sb PDM:Trojan.Win32.Generic Trojan.Win32.Zenpak.sb Trojan-Spy.Noon.HTTP.ServerRequest Trojan-Dropper.Win32.Dorifel.sbd Backdoor.Agent.HTTP.C&C Trojan-Spy.Win32.Noon.sb Trojan-PSW.Win32.Stealer.sb
Verdict:
Malicious
Result
Threat name:
FormBook
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
Antivirus / Scanner detection for submitted sample
Binary is likely a compiled AutoIt script file
Found API chain indicative of sandbox detection
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Unusual module load detection (module proxying)
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Score:
100%
Verdict:
Malware
File Type:
PE
Gathering data
Verdict:
Malicious
Threat:
Family.FORMBOOK
Threat name:
Win32.Trojan.AutoitInject
Status:
Malicious
First seen:
2026-01-30 13:50:54 UTC
File Type:
PE (Exe)
Extracted files:
28
AV detection:
18 of 24 (75.00%)
Threat level:
5/5
Detection(s):
Malicious file
Verdict:
malicious
Label(s):
formbook
Similar samples:
+ 2'521 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
Unpacked files
SH256 hash:
b815f365f539b1893fefa15f8b39382b6ec4f249e75b85e348bab807cb989eff
MD5 hash:
479a27aa7b3d867aca97a062b23dcd37
SHA1 hash:
a2f23b76ee310567340ca15e03b902bde204a75a
SH256 hash:
333440f1ec3ee5d6b5cb6dcad3e08fbb4b94e1bbd9ecb866b01d7e9b27749f71
MD5 hash:
cf6c3ab5ffdf60532336db0677ec676e
SHA1 hash:
0d3e6f1f52050b075331b5660e0c0eb154a85311
SH256 hash:
52d58f8ebc4bc9d2fb5175778cd01e8ea7b18aa9704b0ef0b5f9045c027025fb
MD5 hash:
f6d3c9ccdf648473efa78eb93f48ff49
SHA1 hash:
41a4d9253b949a1711cbc0bdbf942ea704abf366
Malware family:
FormBook
Verdict:
Malicious
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_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: | 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: | Formbook |
|---|---|
| Author: | kevoreilly |
| Description: | Formbook Payload |
| 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: | meth_stackstrings |
|---|---|
| Author: | Willi Ballenthin |
| Rule name: | pe_detect_tls_callbacks |
|---|
| 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: | TH_Generic_MassHunt_Win_Malware_2025_CYFARE |
|---|---|
| Author: | CYFARE |
| Description: | Generic Windows malware mass-hunt rule - 2025 |
| Reference: | https://cyfare.net/ |
| 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.
Malspam
Delivery method
Distributed via e-mail attachment
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