MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 673b0804edc54bb48d24da3e6fccdcf193b737bbf28ca448e215c1c63d5acb0c. 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: 12


Intelligence 12 IOCs YARA 26 File information Comments
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SHA256 hash: 673b0804edc54bb48d24da3e6fccdcf193b737bbf28ca448e215c1c63d5acb0c
SHA3-384 hash: 7ebd1b1c3233060ee4ad63d22307f8d04f7c7bf3c816d5a703629fa1973b1e4baa63edd852a518718211f1545d43b424
SHA1 hash: 2b9df7d1ac163787ecc0fcd24a78560f21a7f667
MD5 hash: 3898c5efb6bba69d5605e7d4a00176b4
humanhash: may-seventeen-edward-friend
File name:673b0804edc54bb48d24da3e6fccdcf193b737bbf28ca448e215c1c63d5acb0c
Download: download sample
Signature Formbook
Create hunting rule
File size:1'026'048 bytes
First seen:2026-08-10 14:56:56 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (49'191 x AgentTesla, 20'339 x Formbook, 12'364 x SnakeKeylogger)
ssdeep 24576:XHu4Ceugd82b3ba/7Az53Zg2PKx2rkq10JUhDLN2PbQp6z:FCefd80b27o53ZgnYkq6UJJ2K6
TLSH T10B2523657AAA5B56F9772BF40E79E23017B53CCCA230C6062EED6CDFB951B040818763
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 :
139
Origin country :
HU HU
Vendor Threat Intelligence
Malware configuration found for:
RoboSki
Details
Link:
https://research.acce.ciphertechsolutions.com/results/2c626e09-6eef-490f-ae10-ca3a42096302/
Gathering data
Detection(s):
Win.Malware.BubbleLevel-10060434-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
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
Threat level:
  10/10
Confidence:
100%
Tags:
base64 entropy expand krypt lolbin packed
Link:
https://www.filescan.io/uploads/6a79e6ef2b1816fd61bc29d1/reports/b55858bb-f37d-4a6b-a7c5-481e97a0cc2f/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/673b0804edc54bb48d24da3e6fccdcf193b737bbf28ca448e215c1c63d5acb0c
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-07-28T03:22:00Z UTC
Last seen:
2026-08-10T04:31:00Z UTC
Hits:
~1000
Link:
https://opentip.kaspersky.com/673b0804edc54bb48d24da3e6fccdcf193b737bbf28ca448e215c1c63d5acb0c/results?tab=lookup
Gathering data
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/673b0804edc54bb48d24da3e6fccdcf193b737bbf28ca448e215c1c63d5acb0c
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/673b0804edc54bb48d24da3e6fccdcf193b737bbf28ca448e215c1c63d5acb0c/
Threat name:
ByteCode-MSIL.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2026-07-28 19:43:00 UTC
File Type:
PE (.Net Exe)
Extracted files:
8
AV detection:
26 of 36 (72.22%)
Threat level:
  5/5
Verdict:
malicious
Label(s):
Formbook
Create hunting rule
Link:
https://reports.threatray.com/6b40ffe7-48c3-485b-83ab-8dbe13a251d3
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery rat spyware stealer trojan
Link:
https://tria.ge/reports/260810-snt6qabr6t/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Program crash
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Family: Formbook
Formbook payload
Unpacked files
SH256 hash:
673b0804edc54bb48d24da3e6fccdcf193b737bbf28ca448e215c1c63d5acb0c
MD5 hash:
3898c5efb6bba69d5605e7d4a00176b4
SHA1 hash:
2b9df7d1ac163787ecc0fcd24a78560f21a7f667
Link:
https://www.unpac.me/results/c4655c0d-52af-4e43-85ec-52fbdfa8ceae/
SH256 hash:
47a856ff7d9bf14949f9a1deed4ba4ec9495a9ef95ee41ba6d78f630561d166c
MD5 hash:
332b4cd85d1b878f5c5bf709b5984644
SHA1 hash:
ddba69ce01e7ea28029d271d4dd2f75bc3bf454f
Link:
https://www.unpac.me/results/c4655c0d-52af-4e43-85ec-52fbdfa8ceae/
SH256 hash:
2c4d156080cee8367c1baa06cf148fbb9e7e21c91aab0c82ee96cfb2f52bfc15
MD5 hash:
4bbe145045d736b5764587b8f1360d94
SHA1 hash:
e0e9489b1095f0d43449a1127ce042ed6f18a9b6
Link:
https://www.unpac.me/results/c4655c0d-52af-4e43-85ec-52fbdfa8ceae/
SH256 hash:
b4fb635f5ff54e516ba5795298520ddb051eb7b7963b77a676fe7554ffb49105
MD5 hash:
05efe3f0e40fd4d406d851f476e514d8
SHA1 hash:
43231755c9e8d276ead8c83b3dfee5e65538e778
Link:
https://www.unpac.me/results/c4655c0d-52af-4e43-85ec-52fbdfa8ceae/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/673b0804edc5/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/673b0804edc54bb48d24da3e6fccdcf193b737bbf28ca448e215c1c63d5acb0c

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
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:DebuggerCheck__GlobalFlags
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Active
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:dgaagas
Create hunting rule
Author:Harshit
Description:Uses certutil.exe to download a file named test.txt
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SEH__vectored
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Sus_CMD_Powershell_Usage
Create hunting rule
Author:XiAnzheng
Description:May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)
Rule name:TH_Win_ETW_Bypass_2025_CYFARE
Create hunting rule
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.

Cape
Cape
https://www.capesandbox.com/analysis/80092/

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