MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b456996591120e1dddad01bcd6651f37ee3a30644d7ef77c3e41c21189615404. 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: 14


Intelligence 14 IOCs YARA 18 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b456996591120e1dddad01bcd6651f37ee3a30644d7ef77c3e41c21189615404
SHA3-384 hash: f94855eb5353855270dd9a4d3c7cd6a4c19983ab3b905c08c3d0a8fdaa5fe0fac9e60f8533b297a36bfae812700cde86
SHA1 hash: 1ff47191dea5fbc688cc1014ace256cc879e58b1
MD5 hash: 26ca9c29e8ecbf9c756f690f15c38bae
humanhash: missouri-green-east-berlin
File name:INVOICE 131112061116..vbs
Download: download sample
Signature Formbook
Create hunting rule
File size:771'771 bytes
First seen:2025-09-06 07:00:53 UTC
Last seen:2025-09-08 13:50:16 UTC
File type:Visual Basic Script (vbs) vbs
MIME type:text/plain
ssdeep 12288:/kawhfr2uDetGustOUoD/XebNoSOZ+tutKST/LpF/VnI2AAdE40N1KtJTb6Q2vrq:/KfaucUa/uAktufVnuAq4oS72vrKmGCS
Threatray 3'672 similar samples on MalwareBazaar
TLSH T146F401F2D542B8300FAA8704644E3F776EBC1DDF41607661101C3AD9F2897FAAD6E6A4
Magika vba
Reporter abuse_ch
Tags:FormBook vbs

Intelligence

File Origin
# of uploads :
2
# of downloads :
65
Origin country :
SE SE
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/25976/
Detection(s):
SecuriteInfo.com.Generic-EXE.UNOFFICIAL
Create hunting rule

Sanesecurity.Malware.28953.VbsHeur.UNOFFICIAL
Create hunting rule

Sanesecurity.Malware.30450.JsHeur.ExeObj.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.PUA.Base64EXE-2.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
81.4%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68bbdcf4eb163e0ec184ebf4
Tags:
infosteal spawn shell sage
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
masquerade obfuscated
Link:
https://www.filescan.io/uploads/68bbdee137c25fcf12d57d50/reports/ca25a4b1-26ac-499a-94e2-be019d2a3522/overview
Verdict:
Malicious
Labled as:
Valyria
Link:
https://www.hybrid-analysis.com/sample/b456996591120e1dddad01bcd6651f37ee3a30644d7ef77c3e41c21189615404
Verdict:
Malicious
File Type:
vbs
First seen:
2025-09-05T09:59:00Z UTC
Last seen:
2025-09-05T09:59:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/b456996591120e1dddad01bcd6651f37ee3a30644d7ef77c3e41c21189615404/results?tab=lookup
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1772239
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Benign windows process drops PE files
C2 URLs / IPs found in malware configuration
Found malware configuration
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for dropped file
Performs DNS queries to domains with low reputation
Potential malicious VBS script found (has network functionality)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: WScript or CScript Dropper
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
VBScript performs obfuscated calls to suspicious functions
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1772239 Sample: INVOICE 131112061116..vbs Startdate: 06/09/2025 Architecture: WINDOWS Score: 100 36 www.alwaonline.xyz 2->36 38 www.usjy.town 2->38 40 2 other IPs or domains 2->40 50 Found malware configuration 2->50 52 Malicious sample detected (through community Yara rule) 2->52 54 Antivirus / Scanner detection for submitted sample 2->54 58 8 other signatures 2->58 12 wscript.exe 2 2->12         started        signatures3 56 Performs DNS queries to domains with low reputation 36->56 process4 file5 34 C:\Users\user\AppData\Local\Temp\x.exe, PE32 12->34 dropped 72 Benign windows process drops PE files 12->72 74 VBScript performs obfuscated calls to suspicious functions 12->74 76 Windows Scripting host queries suspicious COM object (likely to drop second stage) 12->76 16 x.exe 3 12->16         started        signatures6 process7 signatures8 44 Multi AV Scanner detection for dropped file 16->44 46 Tries to detect virtualization through RDTSC time measurements 16->46 48 Switches to a custom stack to bypass stack traces 16->48 19 x.exe 16->19         started        22 x.exe 16->22         started        process9 signatures10 60 Modifies the context of a thread in another process (thread injection) 19->60 62 Maps a DLL or memory area into another process 19->62 64 Sample uses process hollowing technique 19->64 66 Queues an APC in another process (thread injection) 19->66 24 explorer.exe 30 1 19->24 injected process11 dnsIp12 42 204.79.197.203, 443 MICROSOFT-CORP-MSN-AS-BLOCKUS United States 24->42 27 msdt.exe 24->27         started        process13 signatures14 68 Modifies the context of a thread in another process (thread injection) 27->68 70 Maps a DLL or memory area into another process 27->70 30 cmd.exe 1 27->30         started        process15 process16 32 conhost.exe 30->32         started       
Score:
99%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/b456996591120e1dddad01bcd6651f37ee3a30644d7ef77c3e41c21189615404
Verdict:
inconclusive
YARA:
2 match(es)
Tags:
.Net Base64 Block Base64 Payload Contains Base64 Block Executable Managed .NET PDB Path PE (Portable Executable) PE File Layout SOS: 0.21
Link:
https://app.malva.re/file/26ca9c29e8ecbf9c756f690f15c38bae
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b456996591120e1dddad01bcd6651f37ee3a30644d7ef77c3e41c21189615404/
Threat name:
Script-WScript.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2025-09-06 07:13:42 UTC
File Type:
Text
AV detection:
20 of 37 (54.05%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wrljszmrcihb3xnnag6nmzi7g7xdumdejv7po7b6ihbbdclbkqca._file
Verdict:
malicious
Label(s):
unc_loader_037
Create hunting rule
formbook
Create hunting rule
Similar samples:
212151a618e9234e1c746f364ae9f98f12a2198c0ac9c4b3058d056541163240
Formbook
3f56b75e0a22acce7e85ba3b5e24ba8ccdfc573929376671a0ababd8a5db6686
Formbook
41eaa4d9ca00fdef1f8ac2b02ffbb0498b8ed8565916247c20b4a41beaa102a8
Formbook
617bf6800d42409a74ae0539d3e3ffc412e6c4bb137c232159c3ca946bc0fcdd
Formbook
94976e161177276c6c1f03697f87bbbda781fedb937342a311728f51a3bce501
Formbook
b456996591120e1dddad01bcd6651f37ee3a30644d7ef77c3e41c21189615404
Formbook
error
Formbook
+ 3'662 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:aa28 discovery rat spyware stealer trojan
Link:
https://tria.ge/reports/250906-h1bvsszmw6/
Behaviour
Enumerates system info in registry
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Checks computer location settings
Executes dropped EXE
Formbook payload
Formbook
Formbook family
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.81
Link:
https://yomi.yoroi.company/submissions/b456996591120e1dddad01bcd6651f37ee3a30644d7ef77c3e41c21189615404

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:botnet_plaintext_c2
Create hunting rule
Author:cip
Description:Attempts to match at least some of the strings used in some botnet variants which use plaintext communication protocols.
Rule name:Check_OutputDebugStringA_iat
Create hunting rule
Rule name:CP_AllMal_Detector
Create hunting rule
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
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:FreddyBearDropper
Create hunting rule
Author:Dwarozh Hoshiar
Description:Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.
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: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:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)

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/25976/

Comments