In our Open-Source Threat Hunting, Quick Heal Security Researchers encountered a banking Trojan named Aberebot capable of stealing sensitive information from infected devices, including financial and personal data.
Malware authors used advanced anti-reverse engineering and obfuscation techniques to avoid detection. From our investigation, the fake malicious application requires some risky permissions, as shown in Fig 01:
Fig 01. Complex permissions sought by the malware application
The malware has various capabilities, including:
Last month Android security researchers went through one new banking malware named “Escobar.” This malware is the latest variant of the banking Trojans Aberebot. This malware came with some new features in its new avatar, but it is not using Telegram for c2 communication. The main agenda of this trojan is to trick users and steal sensitive information from victims.
The new variant of this malware (Escobar) uses a name and icon like a legitimate app. This malicious APK has the package name “com.escobar.pablo”
Fig 02. Application icon
The operation requests some risky permissions, including:
It also has capabilities that steal sensitive data such as contacts, SMS, call logs, and device location. Besides recording calls and audio, the malware also deletes files, sends SMS, makes calls, and takes pictures using the camera based on the commands received from the C&C server from malware authors.
The Escobar malware has some new additional features.
Fig 03. VNC commands used by Escobar
Fig 04. 2FA code stealing.
Fig 05. Code used to abort.
Banking malware also used various themes to trick the users. We have seen some applications pretending to be banking reward applications and using the legitimate Indian banking applications icon.
Fig 06. Application icon
The malware can steal credit/debit card information, net banking passwords, and SMS to read/submit one-time generated passwords on the victim’s behalf.
Fig 07. Asking for card details.
All the data is encrypted before sending it to the C2 server. These malicious applications can execute commands on the victim’s device transmitted by the malware authors like uploading SMS, call logs, etc.
When all the SMSs have been uploaded to the C2 server, the malware can also delete all the SMSs from the victim’s mobile device.
Fig 08. Code used to delete SMS
Quick Heal Detection
Quick Heal detects these malicious applications with variants of “Android.Agent” and “Android.Banker” name.
Indicator of Compromises (IOCs):
One should have trusted AVs like “Quick Heal Mobile Security for Android” to mitigate such threats and protect you from downloading malicious applications on your mobile device.
As illustrated above, banking malware uses new techniques to lure users by using icons of legitimate applications. These banking Trojans can cause much harm to the infected devices. These types of banking Trojans are sold by Threat actors on dark web forums and use various websites and third-party stores for spreading. Users should be aware of such fake claims and not download and install such applications from untrusted sources.
TIPS TO STAY SAFE
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