Analysis
- max time kernel
148s - max time network
155s - platform
android_x64 - resource
android-x64-20240624-en - resource tags
- submitted
02/11/2024, 21:53
General
- Target 7a4238fc6f5d3c7731c2eb33911298eaa36986040858af56e76628c5dc83e265.apk
- Size 1002KB
- Sample241102-1rsfaszjdl
- SHA256 7a4238fc6f5d3c7731c2eb33911298eaa36986040858af56e76628c5dc83e265
Malware Config
Extracted
-
ermac
-
http://103.139.1.202:3434
Signatures
- Ermac
An Android banking trojan first seen in July 2021.
- Ermac family
- Removes its main activity from the application launcher 1 TTPs 1 IoCs
- Makes use of the framework's Accessibility service 4 TTPs 3 IoCs
Retrieves information displayed on the phone screen using AccessibilityService.
- Obtains sensitive information copied to the device clipboard 2 TTPs 1 IoCs
Application may abuse the framework's APIs to obtain sensitive information copied to the device clipboard.
- Queries the phone number (MSISDN for GSM devices) 1 TTPs
- Acquires the wake lock 1 IoCs
- Makes use of the framework's foreground persistence service 1 TTPs 1 IoCs
Application may abuse the framework's foreground service to continue running in the foreground.
- Performs UI accessibility actions on behalf of the user 1 TTPs 5 IoCs
Application may abuse the accessibility service to prevent their removal.
- Queries the mobile country code (MCC) 1 TTPs 1 IoCs
- Queries the unique device ID (IMEI, MEID, IMSI) 1 TTPs
- Reads information about phone network operator. 1 TTPs
- Registers a broadcast receiver at runtime (usually for listening for system events) 1 TTPs 1 IoCs
- Uses Crypto APIs (Might try to encrypt user data) 1 TTPs 1 IoCs
- Checks CPU information 2 TTPs 1 IoCs
- Checks memory information 2 TTPs 1 IoCs
Processes
-
nusku.ermacv2.apk1⤵
- Removes its main activity from the application launcher
- Makes use of the framework's Accessibility service
- Obtains sensitive information copied to the device clipboard
- Acquires the wake lock
- Makes use of the framework's foreground persistence service
- Performs UI accessibility actions on behalf of the user
- Queries the mobile country code (MCC)
- Registers a broadcast receiver at runtime (usually for listening for system events)
- Uses Crypto APIs (Might try to encrypt user data)
- Checks CPU information
- Checks memory information
Network
MITRE ATT&CK Mobile v15
Persistence
Event Triggered Execution
1Broadcast Receivers
1Foreground Persistence
1Defense Evasion
Foreground Persistence
1Hide Artifacts
1Suppress Application Icon
1Impair Defenses
1Prevent Application Removal
1Input Injection
1Virtualization/Sandbox Evasion
2System Checks
2Credential Access
Clipboard Data
1Input Capture
2GUI Input Capture
1Keylogging
1