ermac | 6c9087da0967c5587c3d08ad9f9fd365f64721324b4a0f4596b7422838f16307

Analysis

max time kernel
146s
max time network
155s
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
01-09-2024 22:04

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General

Target

6c9087da0967c5587c3d08ad9f9fd365f64721324b4a0f4596b7422838f16307.apk
Size

1.0MB
MD5

1cb4daddc222063e824dd557f488133d
SHA1

e48631836a3936bb71067fbb96c8b080fd434720
SHA256

6c9087da0967c5587c3d08ad9f9fd365f64721324b4a0f4596b7422838f16307
SHA512

f7dedb2b0e7069e9217eccc831c7715e1e88a16b9ec8ba2e014b7930aef668251b6af5baaba4835a9bc435f0a660545e8f8078d58bbcba657d1875a76091fb8b
SSDEEP

12288:l/om/+eRaQfAtr0lJXr6Mte7TPZxuWgOBqB/rgQDPDgJkuXFM6yotvxjmmzZr:+mBgHx0lJbxshItrgogJkMHtpj9

Score

10^/10

ermac banker collection credential_access discovery evasion impact infostealer persistence stealth trojan

Malware Config

Extracted

Family

ermac

http://154.216.17.159:3434

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
4552	com.roboliwayoxixa.yabi

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.findAccessibilityNodeInfosByViewId	com.roboliwayoxixa.yabi
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText	com.roboliwayoxixa.yabi
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfoByAccessibilityId	com.roboliwayoxixa.yabi

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	com.roboliwayoxixa.yabi

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.roboliwayoxixa.yabi

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	com.roboliwayoxixa.yabi
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.roboliwayoxixa.yabi
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.roboliwayoxixa.yabi
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.roboliwayoxixa.yabi
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.roboliwayoxixa.yabi

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.roboliwayoxixa.yabi

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.roboliwayoxixa.yabi

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.roboliwayoxixa.yabi

com.roboliwayoxixa.yabi
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:4552