ermac | 33810126f2af45ba1bd6d3c32c36486ac317ef35682145e7ed9c3061daedb581

Analysis

max time kernel
177s
max time network
183s
platform
android_x86
resource
android-x86-arm-20240611.1-en
resource tags

androidarch:armarch:x86image:android-x86-arm-20240611.1-enlocale:en-usos:android-9-x86system
submitted
20-06-2024 22:53

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General

Target

33810126f2af45ba1bd6d3c32c36486ac317ef35682145e7ed9c3061daedb581.apk
Size

984KB
MD5

b7ee0d1bbd68474deadb666960c1e70a
SHA1

1d937e31306f22c372e1182e776925f17f613a5f
SHA256

33810126f2af45ba1bd6d3c32c36486ac317ef35682145e7ed9c3061daedb581
SHA512

357b5edd256ff621dc66e094ed15335afd7f9ef64861c6b65bb4178fcbac285cf4caa459b0d9750fadb59423ddf938bdecb9b34686c05472f99ed88b0f25adbc
SSDEEP

24576:hxaq4uObtJKJWzXRh5Dc0FtdaWxDDV3HDbzSKalg/xRl:PaJuawUzXRDc0IUV3jajlg/B

Score

10^/10

ermac banker collection credential_access discovery evasion impact infostealer persistence stealth trojan

Malware Config

Extracted

Family

ermac

http://sollyzo.duckdns.org

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
4290	com.bigowadasimi.hehu

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.findAccessibilityNodeInfosByText	com.bigowadasimi.hehu
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfoByAccessibilityId	com.bigowadasimi.hehu
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId	com.bigowadasimi.hehu

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	com.bigowadasimi.hehu

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	com.bigowadasimi.hehu

Performs UI accessibility actions on behalf of the user 1 TTPs 11 IoCs

Application may abuse the accessibility service to prevent their removal.

evasion

Prevent Application Removal

T1629.001

ioc	Process
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.bigowadasimi.hehu
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.bigowadasimi.hehu
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.bigowadasimi.hehu
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.bigowadasimi.hehu
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.bigowadasimi.hehu
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.bigowadasimi.hehu
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.bigowadasimi.hehu
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.bigowadasimi.hehu
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.bigowadasimi.hehu
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.bigowadasimi.hehu
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.bigowadasimi.hehu

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	com.bigowadasimi.hehu

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	com.bigowadasimi.hehu

Requests enabling of the accessibility settings. 1 IoCs

description	ioc	Process
Intent action	android.settings.ACCESSIBILITY_SETTINGS	com.bigowadasimi.hehu

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	com.bigowadasimi.hehu

com.bigowadasimi.hehu
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).
- Requests enabling of the accessibility settings.
- Uses Crypto APIs (Might try to encrypt user data)
PID:4290