MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 cfb51f2104257d7d5170f7a8d3bc432d6dae11e02e77d7e0ca0da9e26ae15ba1. 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: 9


Intelligence 9 IOCs YARA File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: cfb51f2104257d7d5170f7a8d3bc432d6dae11e02e77d7e0ca0da9e26ae15ba1
SHA3-384 hash: 301ebad2ac9bb054c4d9e01b65201cc293b32bf354886e60b24bcc8f61ddb30311822f31b9caaa67cb929cee80bcc7eb
SHA1 hash: def4c7b6e7b776d2638ed064286414bfe62e030a
MD5 hash: 32ba1ee78874a80a23a0d09427d52af6
humanhash: ink-magazine-helium-yellow
File name:kimber3.kesug.com_arquivo_702ca5081a624c2289e8e5f091538c5a.txt.vbs
Download: download sample
Signature Formbook
Create hunting rule
File size:118'186 bytes
First seen:2025-04-29 14:53:07 UTC
Last seen:Never
File type:Visual Basic Script (vbs) vbs
MIME type:text/plain
ssdeep 192:2geRRpIFIx3lR3J9H7Vs5JTM7SgvkCNXosSBB8iTH+V62jJLYO713st68gEQfDJu:2gepL822HbUr06Ltlk+nnnnO
Threatray 83 similar samples on MalwareBazaar
TLSH T12EC39BF57F96FA1FE4D687248A0268D6B6E0E4DDA7C5F33C202B31F55CA599403062AC
Magika vba
Reporter TomU
Tags:FormBook vbs

Intelligence

File Origin
# of uploads :
1
# of downloads :
112
Origin country :
CH CH
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/5022/
Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6810eccfcc5fb3600cc4947f
Tags:
xtreme shell sage
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
base64 evasive masquerade obfuscated obfuscated overlay powershell
Link:
https://www.filescan.io/uploads/6810e7da218c4a98ade77d0b/reports/7a4f5abc-6f91-4f4a-9162-cdd406c89246/overview
Verdict:
Malicious
Labled as:
HEUR_Trojan_Script_Generic
Link:
https://www.hybrid-analysis.com/sample/cfb51f2104257d7d5170f7a8d3bc432d6dae11e02e77d7e0ca0da9e26ae15ba1
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1677408
Signature
Antivirus detection for URL or domain
Found direct / indirect Syscall (likely to bypass EDR)
Found Tor onion address
Injects a PE file into a foreign processes
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)
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: Cscript/Wscript Uncommon Script Extension Execution
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: WScript or CScript Dropper
Suricata IDS alerts for network traffic
Suspicious execution chain found
Suspicious powershell command line found
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)
VBScript performs obfuscated calls to suspicious functions
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
Yara detected FormBook
Yara detected Powershell decode and execute
Yara detected Powershell download and execute
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1677408 Sample: kimber3.kesug.com_arquivo_7... Startdate: 29/04/2025 Architecture: WINDOWS Score: 100 48 www.maizhaozhibo.net 2->48 50 kimber3.kesug.com 2->50 52 10 other IPs or domains 2->52 72 Suricata IDS alerts for network traffic 2->72 74 Malicious sample detected (through community Yara rule) 2->74 76 Antivirus detection for URL or domain 2->76 78 10 other signatures 2->78 11 wscript.exe 1 2->11         started        14 svchost.exe 1 1 2->14         started        17 wscript.exe 2->17         started        signatures3 process4 dnsIp5 96 VBScript performs obfuscated calls to suspicious functions 11->96 98 Suspicious powershell command line found 11->98 100 Wscript starts Powershell (via cmd or directly) 11->100 102 2 other signatures 11->102 19 powershell.exe 14 16 11->19         started        66 127.0.0.1 unknown unknown 14->66 signatures6 process7 dnsIp8 54 kimber3.kesug.com 185.27.134.34, 49718, 80 WILDCARD-ASWildcardUKLimitedGB United Kingdom 19->54 56 archive.org 207.241.224.2, 443, 49715 INTERNET-ARCHIVEUS United States 19->56 58 ia801700.us.archive.org 207.241.233.30, 443, 49716 INTERNET-ARCHIVEUS United States 19->58 80 Found Tor onion address 19->80 82 Writes to foreign memory regions 19->82 84 Injects a PE file into a foreign processes 19->84 23 cmd.exe 19->23         started        26 cmd.exe 1 19->26         started        28 conhost.exe 19->28         started        30 conhost.exe 19->30         started        signatures9 process10 signatures11 94 Maps a DLL or memory area into another process 23->94 32 JLyjra533PSJOal.exe 23->32 injected 35 conhost.exe 26->35         started        process12 signatures13 68 Maps a DLL or memory area into another process 32->68 70 Found direct / indirect Syscall (likely to bypass EDR) 32->70 37 svchost.exe 13 32->37         started        40 ctfmon.exe 32->40         started        process14 signatures15 86 Tries to steal Mail credentials (via file / registry access) 37->86 88 Tries to harvest and steal browser information (history, passwords, etc) 37->88 90 Modifies the context of a thread in another process (thread injection) 37->90 92 3 other signatures 37->92 42 JLyjra533PSJOal.exe 37->42 injected 46 firefox.exe 37->46         started        process16 dnsIp17 60 www.yeupnz.info 47.83.1.90, 49725, 80 VODANETInternationalIP-BackboneofVodafoneDE United States 42->60 62 www.a2market.online 31.31.198.56, 49730, 49731, 49732 AS-REGRU Russian Federation 42->62 64 2 other IPs or domains 42->64 104 Found direct / indirect Syscall (likely to bypass EDR) 42->104 signatures18
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/cfb51f2104257d7d5170f7a8d3bc432d6dae11e02e77d7e0ca0da9e26ae15ba1/
Threat name:
Script.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2025-04-28 05:56:01 UTC
File Type:
Binary
AV detection:
9 of 24 (37.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=z62r6iieev6x2ulq66unhpcdfvw24epafz35pygkbwu6e2xbloqq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
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Formbook
221abd54ab0f8572e4fd5ae828d3f2c0d3e5abe774f61cb2d0d909c96801b70b
Formbook
46da3fcbf018eba10b7614fe5accde6ba53e5da31b16d51af725810de6340c83
Formbook
7c3ff0fc1748fa37047666d9ed7c74d1bcf1bd5a5277995d9e37c1af3b161d54
Formbook
909c33d6348be0cf34686e22658f9957c57ca0dfdcd47c1000e6b0ec61502547
Formbook
a370678f4e161f2f30b871bac7144e24e14f8151430bd79cb170085dc31a57e6
Formbook
da135dbe63cea0a7437a04319e45dbdbffd22b1c27dc2c50d334a3117af6bb1a
Formbook
error
Formbook
f42e5e71951226abef9b73e236b7d374c7144b66e8f2cc055d536cf444547fe6
Formbook
fd3141f160c3e5782f6d2ce06b10f90af52dd438856295a925820ee0dfe23a96
Formbook
+ 73 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  8/10
Tags:
execution
Link:
https://tria.ge/reports/250429-r9cywstks9/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Enumerates physical storage devices
Suspicious use of SetThreadContext
Checks computer location settings
Blocklisted process makes network request
Command and Scripting Interpreter: PowerShell
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/cfb51f2104257d7d5170f7a8d3bc432d6dae11e02e77d7e0ca0da9e26ae15ba1

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

Formbook

Visual Basic Script (vbs) vbs cfb51f2104257d7d5170f7a8d3bc432d6dae11e02e77d7e0ca0da9e26ae15ba1

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/5022/

Comments