ermac | b94b009d388861ce71294ae37a187aec876537892a1f6b604aef2eea195454ee

Analysis

max time kernel
178s
max time network
185s
platform
android_x64
resource
android-x64-arm64-20240624-en
resource tags

androidarch:armarch:arm64arch:x64arch:x86image:android-x64-arm64-20240624-enlocale:en-usos:android-11-x64system
submitted
13-08-2024 22:01

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General

Target

b94b009d388861ce71294ae37a187aec876537892a1f6b604aef2eea195454ee.apk
Size

1020KB
MD5

87d808ae946f264bc4f51d840cbd2ef7
SHA1

46ceffe97c7fb18c5a4d4507b16093573783cb92
SHA256

b94b009d388861ce71294ae37a187aec876537892a1f6b604aef2eea195454ee
SHA512

5cca3f678e19a28e74c839c3ce94749d11c1c835b19cca6cd1ea8a1e566afc0560cf70d46af5494098967711e9cc83a94d450877b6f43150e1d9e650dc95547c
SSDEEP

12288:sgA4qDzknaOA0utwjasV5/x3LgXQba74vywm1QVxbMzmemnGvJ+wMRaVwyWL:sg/AkaOl+6JV5/x3L676muL27vwxwDWL

Score

10^/10

ermac banker collection credential_access discovery evasion impact infostealer persistence stealth trojan

Malware Config

Extracted

Family

ermac

http://154.216.18.158:3434

AES_key

Signatures

Ermac
An Android banking trojan first seen in July 2021.
banker trojan infostealer ermac

Removes its main activity from the application launcher 1 TTPs 1 IoCs

stealth trojan evasion

Suppress Application Icon

T1628.001

pid	Process
4466	hba.mjyhwvxbuyqi.kdnxvd

Makes use of the framework's Accessibility service 4 TTPs 3 IoCs

Retrieves information displayed on the phone screen using AccessibilityService.

collection evasion credential_access

Input Injection

T1516

Screen Capture

T1513

Keylogging

T1417.001

GUI Input Capture

T1417.002

description	ioc	Process
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfoByAccessibilityId	hba.mjyhwvxbuyqi.kdnxvd
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId	hba.mjyhwvxbuyqi.kdnxvd
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText	hba.mjyhwvxbuyqi.kdnxvd

Queries a list of all the installed applications on the device (Might be used in an attempt to overlay legitimate apps) 1 TTPs
banker discovery

Security Software Discovery
T1418.001
Queries the phone number (MSISDN for GSM devices) 1 TTPs
discovery

System Network Configuration Discovery
T1422

Acquires the wake lock 1 IoCs

description	ioc	Process
Framework service call	android.os.IPowerManager.acquireWakeLock	hba.mjyhwvxbuyqi.kdnxvd

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.

evasion persistence

Foreground Persistence

T1541

description	ioc	Process
Framework service call	android.app.IActivityManager.setServiceForeground	hba.mjyhwvxbuyqi.kdnxvd

Performs UI accessibility actions on behalf of the user 1 TTPs 5 IoCs

Application may abuse the accessibility service to prevent their removal.

evasion

Prevent Application Removal

T1629.001

ioc	Process
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	hba.mjyhwvxbuyqi.kdnxvd
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	hba.mjyhwvxbuyqi.kdnxvd
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	hba.mjyhwvxbuyqi.kdnxvd
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	hba.mjyhwvxbuyqi.kdnxvd
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	hba.mjyhwvxbuyqi.kdnxvd

Queries the mobile country code (MCC) 1 TTPs 1 IoCs

discovery

System Network Configuration Discovery

T1422

description	ioc	Process
Framework service call	com.android.internal.telephony.ITelephony.getNetworkCountryIsoForPhone	hba.mjyhwvxbuyqi.kdnxvd

Queries the unique device ID (IMEI, MEID, IMSI) 1 TTPs
discovery

System Network Configuration Discovery
T1422

Requests disabling of battery optimizations (often used to enable hiding in the background). 1 TTPs 1 IoCs

evasion

User Evasion

T1628.002

description	ioc	Process
Intent action	android.settings.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS	hba.mjyhwvxbuyqi.kdnxvd

Uses Crypto APIs (Might try to encrypt user data) 1 TTPs 1 IoCs

impact

Data Encrypted for Impact

T1471

description	ioc	Process
Framework API call	javax.crypto.Cipher.doFinal	hba.mjyhwvxbuyqi.kdnxvd

hba.mjyhwvxbuyqi.kdnxvd
1⤵
- 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).
- Uses Crypto APIs (Might try to encrypt user data)
PID:4466