Analysis
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max time kernel
178s -
max time network
182s -
platform
android_x86 -
resource
android-x86-arm-20240624-en -
resource tags
androidarch:armarch:x86image:android-x86-arm-20240624-enlocale:en-usos:android-9-x86system -
submitted
11-07-2024 22:07
Static task
static1
Behavioral task
behavioral1
Sample
4a55b500b6f19a08245fd9a06601933fdc5b7e1ab19975c0058dcc7cd58d2a4f.apk
Resource
android-x86-arm-20240624-en
Behavioral task
behavioral2
Sample
4a55b500b6f19a08245fd9a06601933fdc5b7e1ab19975c0058dcc7cd58d2a4f.apk
Resource
android-x64-20240624-en
Behavioral task
behavioral3
Sample
4a55b500b6f19a08245fd9a06601933fdc5b7e1ab19975c0058dcc7cd58d2a4f.apk
Resource
android-x64-arm64-20240624-en
General
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Target
4a55b500b6f19a08245fd9a06601933fdc5b7e1ab19975c0058dcc7cd58d2a4f.apk
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Size
1.2MB
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MD5
8bd2143870f954032d93cc03f6d0f75b
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SHA1
3f9bf9dafb037e9aba94d03e571a40953e3eb793
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SHA256
4a55b500b6f19a08245fd9a06601933fdc5b7e1ab19975c0058dcc7cd58d2a4f
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SHA512
8ce532ee02013588b1e08d03e1f2ad977f32396e4359cafb9c4afebb0f148f2cd2221ad821c1099c065ddfe8a14b5ad92fa650703c04008f4baaac579133f3cd
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SSDEEP
24576:poG9uMkqxybVYd6okIxt4l0kmNPF/juhKCJFxcxPo3j139dgypD1:aydgbGd6vIcl0kYF/oxcg3j139dg6
Malware Config
Extracted
ermac
http://89.213.56.192:3434
Signatures
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Ermac
An Android banking trojan first seen in July 2021.
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pid Process 4216 nusku.ermacv2.apk -
Makes use of the framework's Accessibility service 4 TTPs 3 IoCs
Retrieves information displayed on the phone screen using AccessibilityService.
description ioc Process Framework service call android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText nusku.ermacv2.apk Framework service call android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfoByAccessibilityId nusku.ermacv2.apk Framework service call android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId nusku.ermacv2.apk -
Queries the phone number (MSISDN for GSM devices) 1 TTPs
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Acquires the wake lock 1 IoCs
description ioc Process Framework service call android.os.IPowerManager.acquireWakeLock nusku.ermacv2.apk -
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.
description ioc Process Framework service call android.app.IActivityManager.setServiceForeground nusku.ermacv2.apk -
Performs UI accessibility actions on behalf of the user 1 TTPs 7 IoCs
Application may abuse the accessibility service to prevent their removal.
ioc Process android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction nusku.ermacv2.apk android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction nusku.ermacv2.apk android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction nusku.ermacv2.apk android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction nusku.ermacv2.apk android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction nusku.ermacv2.apk android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction nusku.ermacv2.apk android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction nusku.ermacv2.apk -
Queries the mobile country code (MCC) 1 TTPs 1 IoCs
description ioc Process Framework service call com.android.internal.telephony.ITelephony.getNetworkCountryIsoForPhone nusku.ermacv2.apk -
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
description ioc Process Intent action android.settings.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS nusku.ermacv2.apk -
Registers a broadcast receiver at runtime (usually for listening for system events) 1 TTPs 1 IoCs
description ioc Process Framework service call android.app.IActivityManager.registerReceiver nusku.ermacv2.apk -
Uses Crypto APIs (Might try to encrypt user data) 1 TTPs 1 IoCs
description ioc Process Framework API call javax.crypto.Cipher.doFinal nusku.ermacv2.apk -
Checks CPU information 2 TTPs 1 IoCs
description ioc Process File opened for read /proc/cpuinfo nusku.ermacv2.apk -
Checks memory information 2 TTPs 1 IoCs
description ioc Process File opened for read /proc/meminfo nusku.ermacv2.apk
Processes
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nusku.ermacv2.apk1⤵
- Removes its main activity from the application launcher
- Makes use of the framework's Accessibility service
- 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
PID:4216
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
2