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Analysis
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max time kernel
149s -
max time network
153s -
platform
android_x64 -
resource
android-x64-arm64-20240221-en -
resource tags
androidarch:armarch:arm64arch:x64arch:x86image:android-x64-arm64-20240221-enlocale:en-usos:android-11-x64system -
submitted
16/04/2024, 22:01
Behavioral task
behavioral1
Sample
52435cd21f3d725029038fd4c24e22f819dee4ea035107bb30ee2895d9d02b29.apk
Resource
android-x86-arm-20240221-en
Behavioral task
behavioral2
Sample
52435cd21f3d725029038fd4c24e22f819dee4ea035107bb30ee2895d9d02b29.apk
Resource
android-x64-20240221-en
Behavioral task
behavioral3
Sample
52435cd21f3d725029038fd4c24e22f819dee4ea035107bb30ee2895d9d02b29.apk
Resource
android-x64-arm64-20240221-en
General
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Target
52435cd21f3d725029038fd4c24e22f819dee4ea035107bb30ee2895d9d02b29.apk
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Size
994KB
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MD5
b5ee66fe34fab727ce1541e054bbd8a5
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SHA1
8f4836b5604816f398eee8d42073eca89bfeb145
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SHA256
52435cd21f3d725029038fd4c24e22f819dee4ea035107bb30ee2895d9d02b29
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SHA512
9e699052d0fb9c4b1fe06e0b24d160a861da18ce4c2f754d92c005a3ad112385744d0e8ad4d2b29ad173c1b1f7265fdfdba5f26b9790abf9a47dfcdfe4f81900
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SSDEEP
24576:zTww2poKQAdjHLE3z48qKCfCVCwCICHCCCnCICrCXgSDUW:z8w5XYasge0V5WHWpiKgSn
Malware Config
Extracted
ermac
http://87.120.84.22:3434
Signatures
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Ermac
An Android banking trojan first seen in July 2021.
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Makes use of the framework's Accessibility service 2 TTPs 3 IoCs
Retrieves information displayed on the phone screen using AccessibilityService.
description ioc Process Framework service call android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfoByAccessibilityId nusku.ermacv2.apk Framework service call android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId nusku.ermacv2.apk Framework service call android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText nusku.ermacv2.apk -
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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pid Process 4417 nusku.ermacv2.apk -
Checks CPU information 2 TTPs 1 IoCs
Checks CPU information which indicate if the system is an emulator.
description ioc Process File opened for read /proc/cpuinfo nusku.ermacv2.apk -
Checks memory information 2 TTPs 1 IoCs
Checks memory information which indicate if the system is an emulator.
description ioc Process File opened for read /proc/meminfo 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 -
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 -
Queries the unique device ID (IMEI, MEID, IMSI) 1 TTPs
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Reads information about phone network operator. 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 -
Uses Crypto APIs (Might try to encrypt user data) 1 IoCs
description ioc Process Framework API call javax.crypto.Cipher.doFinal nusku.ermacv2.apk
Processes
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nusku.ermacv2.apk1⤵
- Makes use of the framework's Accessibility service
- Removes its main activity from the application launcher
- Checks CPU information
- Checks memory information
- Makes use of the framework's foreground persistence service
- Acquires the wake lock
- Requests disabling of battery optimizations (often used to enable hiding in the background).
- Uses Crypto APIs (Might try to encrypt user data)
PID:4417
Network
MITRE ATT&CK Mobile v15
Defense Evasion
Foreground Persistence
1Hide Artifacts
2Suppress Application Icon
1User Evasion
1Input Injection
1Virtualization/Sandbox Evasion
2System Checks
2