#FactCheck: Busting Fake SBI Self-KYC APK Scam – Don’t Fall for Phishing Tricks!

Research Wing
Research Wing
Innovation and Research
PUBLISHED ON
Nov 15, 2024
10

Introduction:

This report examines ongoing phishing scams targeting "State Bank of India (SBI)" customers, India's biggest public bank using fake SelfKYC APKs to trick people. The image plays a part in a phishing plan to get users to download bogus APK files by claiming they need to update or confirm their "Know Your Customer (KYC)" info.

Fake Claim:

A picture making the rounds on social media comes with an APK file. It shows a phishing message that says the user's SBI YONO account will stop working because of their "Old PAN card." It then tells the user to install the "WBI APK" APK (Android Application Package) to check documents and keep their account open. This message is fake and aims to get people to download a harmful app.

Key Characteristics of the Scam:

  • The messages "URGENTLY REQUIRED" and "Your account will be blocked today" show how scammers try to scare people into acting fast without thinking.
  • PAN Card Reference: Crooks often use PAN card verification and KYC updates as a trick because these are normal for Indian bank customers.
  • Risky APK Downloads: The message pushes people to get APK files, which can be dangerous. APKs from places other than the Google Play Store often have harmful software.
  • Copying the Brand: The message looks a lot like SBI's real words and logos to seem legit.
  • Shady Source: You can't find the APK they mention on Google Play or SBI's website, which means you should ignore the app right away.

Modus Operandi:

  • Delivery Mechanism: Typically, users of messaging services like "WhatsApp," "SMS," or "email" receive identical messages with an APK link, which is how the scam is distributed.
  • APK Installation: The phony APK frequently asks for a lot of rights once it is  installed, including access to "SMS," "contacts," "calls," and "banking apps."
  • Data Theft: Once installed, the program may have the ability to steal card numbers, personal information, OTPs, and banking credentials.
  • Remote Access: These APKs may occasionally allow cybercriminals to remotely take control of the victim's device in order to carry out fraudulent financial activities.

While the user installs the application on their device the following interface opens: 

It asks the user to allow the following:

  • SMS is used to send and receive info from the bank.
  • User details such as Username, Password, Mobile Number, and Captcha. 

Technical Findings of the Application:

Static Analysis:

  • File Name: SBI SELF KYC_015850.apk
  • Package Name: com.mark.dot.comsbione.krishn
  • Scan Date: Sept. 25, 2024, 6:45 a.m.
  • App Security Score: 52/100 (MEDIUM RISK)
  • Grade: B

File Information:

  • File Name: SBI SELF KYC_015850.apk
  • Size: 2.88MB
  • MD5: 55fdb5ff999656ddbfa0284d0707d9ef
  • SHA1: 8821ee6475576beb86d271bc15882247f1e83630
  • SHA256: 54bab6a7a0b111763c726e161aa8a6eb43d10b76bb1c19728ace50e5afa40448

App Information:

  • App Name: SBl Bank
  • Package Name:: com.mark.dot.comsbione.krishn
  • Main Activity: com.mark.dot.comsbione.krishn.MainActivity
  • Target SDK: 34
  • Min SDK: 24
  • Max SDK:
  • Android Version Name:: 1.0
  • Android Version Code:: 1

App Components:

  • Activities: 8
  • Services: 2
  • Receivers: 2
  • Providers: 1
  • Exported Activities: 0
  • Exported Services: 1
  • Exported Receivers: 2
  • Exported Providers:: 0

Certificate Information:

  • Binary is signed
  • v1 signature: False
  • v2 signature: True
  • v3 signature: False
  • v4 signature: False
  • X.509 Subject: CN=PANDEY, OU=PANDEY, O=PANDEY, L=NK, ST=NK, C=91
  • Signature Algorithm: rsassa_pkcs1v15
  • Valid From: 20240904 07:38:35+00:00
  • Valid To: 20490829 07:38:35+00:00
  • Issuer: CN=PANDEY, OU=PANDEY, O=PANDEY, L=NK, ST=NK, C=91
  • Serial Number: 0x1
  • Hash Algorithm: sha256
  • md5: 4536ca31b69fb68a34c6440072fca8b5
  • sha1: 6f8825341186f39cfb864ba0044c034efb7cb8f4
  • sha256: 6bc865a3f1371978e512fa4545850826bc29fa1d79cdedf69723b1e44bf3e23f
  • sha512:05254668e1c12a2455c3224ef49a585b599d00796fab91b6f94d0b85ab48ae4b14868dabf16aa609c3b6a4b7ac14c7c8f753111b4291c4f3efa49f4edf41123d
  • PublicKey Algorithm: RSA
  • Bit Size: 2048
  • Fingerprint: a84f890d7dfbf1514fc69313bf99aa8a826bade3927236f447af63fbb18a8ea6
  • Found 1 unique certificate

App Permission 

1. Normal Permissions

  • Access_network_state: Allows the App to View the Network Status of All Networks.
  • Foreground_service: Enables Regular Apps to Use Foreground Services.
  • Foreground_service_data_sync: Allows Data Synchronization With Foreground Services.
  • Internet: Grants Full Internet Access.

2. Signature Permission:

  • Broadcast_sms: Sends Sms Received Broadcasts. It Can Be Abused by Malicious Apps to Forge Incoming Sms Messages.

3. Dangerous Permissions:

  • Read_phone_numbers: Grants Access to the Device’s Phone Number(S).
  • Read_phone_state: Reads the Phone’s State and Identity, Including Phone Features and Data.
  • Read_sms: Allows the App to Read Sms or Mms Messages Stored on the Device or Sim Card. Malicious Apps Could Use This to Read Confidential Messages.
  • Receive_sms: Enables the App to Receive and Process Sms Messages. Malicious Apps Could Monitor or Delete Messages Without Showing Them to the User.
  • Send_sms: Allows the App to Send Sms Messages. Malicious Apps Could Send Messages Without the User’s Confirmation, Potentially Leading to Financial Costs.

On further analysis on virustotal platform using md5 hash file, the following results were retrieved where there are 24 security vendors out of 68, marked this apk file as malicious and the graph represents the distribution of malicious file in the environment.

Img source: VirusTotal

Key Takeaways:

  • Normal Permissions: Generally Safe for Accessing Basic Functionalities (Network State, Internet).
  • Signature Permissions: May Pose Risks When Misused, Especially Related to Sms Broadcasts.
  • Dangerous Permissions: Provide Sensitive Data Access, Such as Phone Numbers and Device Identity, Which Can Be Exploited by Malicious Apps.
  • The Dangerous Permissions Pose Risks Regarding the Reading, Receiving, and Sending of Sms, Which Can Lead to Privacy Breaches or Financial Consequences.

How to Identify the Scam:

  • Official Statement: SBI never asks clients to download unauthorized APKs for upgrades related to KYC or other services. All formal correspondence takes place via the SBI YONO app, which may be found in reputable app shops.
  • No Immediate Threats: Bank correspondence never employs menacing language or issues harsh deadlines, such as "your account will be blocked today."
  • Email Domain and SMS Number: Verified email addresses or phone numbers are used for official SBI correspondence. Generic, unauthorized numbers or addresses are frequently used in scams.
  • Links and APK Files: Steer clear of downloading APK files from unreliable sources at all times. For app downloads, visit the Apple App Store or Google Play Store instead.

CyberPeace Advisory:

  • The Research team recommends that people should avoid opening such messages sent via social platforms. One must always think before clicking on such links, or downloading any attachments from unauthorised sources.
  • Downloading any application from any third party sources instead of the official app store should be avoided. This will greatly reduce the risk of downloading a malicious app, as official app stores have strict guidelines for app developers and review each app before it gets published on the store.
  • Even if you download the application from an authorised source, check the app's permissions before you install it. Some malicious apps may request access to sensitive information or resources on your device. If an app is asking for too many permissions, it's best to avoid it.
  • Keep your device and the app-store app up to date. This will ensure that you have the latest security updates and bug fixes.
  • Falling into such a trap could result in a complete compromise of the system, including access to sensitive information such as microphone recordings, camera footage, text messages, contacts, pictures, videos, and even banking applications and could lead users to financial loss.
  • Do not share confidential details like credentials, banking information with such types of Phishing scams.
  • Never share or forward fake messages containing links on any social platform without proper verification.

Conclusion:

Fake APK phishing scams target financial institutions more often. This report outlines safety steps for SBI customers and ways to spot and steer clear of these cons. Keep in mind that legitimate banks never ask you to get an APK from shady websites or threaten to close your account right away. To stay safe, use SBI's official YONO app on both systems and get apps from trusted places like Google Play or the Apple App Store. Check if the info is true before you do anything turn on 2FA for all your bank and money accounts, and tell SBI or your local cyber police about any scams you see.

PUBLISHED ON
Nov 15, 2024
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