ermac | f66c4855b750d92233c5d6b0ec94dbaaa875e8c287104a5176b25423b833d945

Analysis

max time kernel
149s
max time network
155s
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
17-01-2025 22:06

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General

Target

f66c4855b750d92233c5d6b0ec94dbaaa875e8c287104a5176b25423b833d945.apk
Size

1020KB
MD5

a897b740e09b021905f0c270ff2ef9cd
SHA1

4d16a7d1ee6c6630807788f0ed0c0d6d30af11af
SHA256

f66c4855b750d92233c5d6b0ec94dbaaa875e8c287104a5176b25423b833d945
SHA512

d91f85849e83c21146364a3c6183e22aaf01d92ecd26961887aa1c530ebb1043de54bc385c2ff54aa046d36723129bbd1d6b39fe9b8e51b5e68e112f97435997
SSDEEP

24576:Vg/GL5O9nmQFXjH9IdIMp9FiIsH3ws5kVw1bb8LTO:Vg/l9nvCdIMHFi13f5k+Fb

Score

10^/10

ermac banker collection credential_access discovery evasion impact infostealer persistence stealth trojan

Malware Config

Extracted

Family

ermac

http://172.93.100.16:3434

AES_key

Signatures

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

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

stealth trojan evasion

Suppress Application Icon

T1628.001

pid	Process
4249	com.kunoxirocutewo.safi

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	com.kunoxirocutewo.safi
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId	com.kunoxirocutewo.safi
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText	com.kunoxirocutewo.safi

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.kunoxirocutewo.safi

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.kunoxirocutewo.safi

Performs UI accessibility actions on behalf of the user 1 TTPs 7 IoCs

Application may abuse the accessibility service to prevent their removal.

evasion

Prevent Application Removal

T1629.001

ioc	Process
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.kunoxirocutewo.safi
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.kunoxirocutewo.safi
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.kunoxirocutewo.safi
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.kunoxirocutewo.safi
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.kunoxirocutewo.safi
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.kunoxirocutewo.safi
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.kunoxirocutewo.safi

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.kunoxirocutewo.safi

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.kunoxirocutewo.safi

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.kunoxirocutewo.safi

com.kunoxirocutewo.safi
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:4249