Analysis
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max time kernel
149s -
max time network
155s -
platform
android_x86 -
resource
android-x86-arm-20240624-en -
resource tags
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submitted
23-01-2025 22:00
General
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Target
childapp.apk
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Size
1.2MB
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MD5
fd972a106451b62404c205da115c8d8f
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SHA1
2509272c4d442095c7e69f8ae8c16343953f2c06
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SHA256
1b3d6a90e373874354f8de26b8ea28672297e13aeab96511095c692a0aff30ee
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SHA512
e4d7a065e4f99eba25caded2e16173daaa0881c467423b4130d815e9ea728037e7cb5697b79a86fb19e6d3e2c38f30a4e6c70ad8a8ca608a009c80d1f9457bcb
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SSDEEP
24576:k4fyduHguH/3uHNuHsiW9uHjCnuH8uHSuHt4uHZuH4fNxaEyEnFsdC070nR:k4fnZ/SE7X/lfnw6EbEnQR0nR
Malware Config
Extracted
ermac
http://31.56.60.49
Signatures
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Ermac
An Android banking trojan first seen in July 2021.
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Ermac family
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Removes its main activity from the application launcher 1 TTPs 1 IoCs
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Makes use of the framework's Accessibility service 4 TTPs 3 IoCs
Retrieves information displayed on the phone screen using AccessibilityService.
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Queries a list of all the installed applications on the device (Might be used in an attempt to overlay legitimate apps) 1 TTPs
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Queries account information for other applications stored on the device 1 TTPs 1 IoCs
Application may abuse the framework's APIs to collect account information stored on the device.
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Queries the phone number (MSISDN for GSM devices) 1 TTPs
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Reads the contacts stored on the device. 1 TTPs 1 IoCs
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Acquires the wake lock 1 IoCs
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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.
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Performs UI accessibility actions on behalf of the user 1 TTPs 5 IoCs
Application may abuse the accessibility service to prevent their removal.
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Queries the mobile country code (MCC) 1 TTPs 1 IoCs
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Queries the unique device ID (IMEI, MEID, IMSI) 1 TTPs
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Requests disabling of battery optimizations (often used to enable hiding in the background). 1 TTPs 1 IoCs
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Registers a broadcast receiver at runtime (usually for listening for system events) 1 TTPs 1 IoCs
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Uses Crypto APIs (Might try to encrypt user data) 1 TTPs 1 IoCs
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Checks CPU information 2 TTPs 1 IoCs
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Checks memory information 2 TTPs 1 IoCs
Processes
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nusku.ermacv2.apk1⤵
- Removes its main activity from the application launcher
- Makes use of the framework's Accessibility service
- Queries account information for other applications stored on the device
- Reads the contacts stored on the device.
- 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)
- Requests disabling of battery optimizations (often used to enable hiding in the background).
- 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
2Suppress Application Icon
1User Evasion
1Impair Defenses
1Prevent Application Removal
1Input Injection
1Virtualization/Sandbox Evasion
2System Checks
2Discovery
Software Discovery
1Security Software Discovery
1System Information Discovery
2System Network Configuration Discovery
3