ermac | dd979ddb9f1b198f36cf8714208ec7d1c73f8183e5fe26b926810d9ebd8be2bc

Analysis

max time kernel
150s
max time network
159s
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
10-04-2024 22:03

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General

Target

dd979ddb9f1b198f36cf8714208ec7d1c73f8183e5fe26b926810d9ebd8be2bc.apk
Size

945KB
MD5

88ba3dc89f067894f64f0160e8d5bf70
SHA1

4d86ff5d2b4cfc08cac7667d6e5609577fa19948
SHA256

dd979ddb9f1b198f36cf8714208ec7d1c73f8183e5fe26b926810d9ebd8be2bc
SHA512

8c4492317489b7e5478103ff5ddc04b428ca35762c7aefb4fcb5f71610120a9eedeb0e8433cf32f0f93d5ba8aef31534bccc54802ed0fc7673a7e9dd6dc510eb
SSDEEP

24576:fTnRyQYbG2EziWvu4nLO9qvhMV8XSNRK2g/Gnqw:fTnRybbGnmbsLOc5MVjzK2g/g

Score

10^/10

ermac banker collection discovery evasion infostealer persistence stealth trojan

Malware Config

Extracted

Family

ermac

http://193.222.96.215:3434

AES_key

Signatures

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

Makes use of the framework's Accessibility service 2 TTPs 3 IoCs

Retrieves information displayed on the phone screen using AccessibilityService.

collection evasion

Input Injection

T1516

Screen Capture

T1513

description	ioc	Process
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfoByAccessibilityId	com.yomogejaxuke.cotijo
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId	com.yomogejaxuke.cotijo
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText	com.yomogejaxuke.cotijo

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

banker discovery

Security Software Discovery

T1418.001

description	ioc	Process
Framework service call	android.content.pm.IPackageManager.getInstalledApplications	com.yomogejaxuke.cotijo

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

stealth trojan evasion

Suppress Application Icon

T1628.001

pid	Process
4470	com.yomogejaxuke.cotijo

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.yomogejaxuke.cotijo

Queries the phone number (MSISDN for GSM devices) 1 TTPs
discovery

System Network Configuration Discovery
T1422

Requests enabling of the accessibility settings. 1 IoCs

description	ioc	Process
Intent action	android.settings.ACCESSIBILITY_SETTINGS	com.yomogejaxuke.cotijo

Acquires the wake lock 1 IoCs

description	ioc	Process
Framework service call	android.os.IPowerManager.acquireWakeLock	com.yomogejaxuke.cotijo

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.yomogejaxuke.cotijo

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

description	ioc	Process
Framework API call	javax.crypto.Cipher.doFinal	com.yomogejaxuke.cotijo

com.yomogejaxuke.cotijo
1⤵
- Makes use of the framework's Accessibility service
- Queries a list of all the installed applications on the device (Might be used in an attempt to overlay legitimate apps)
- Removes its main activity from the application launcher
- Makes use of the framework's foreground persistence service
- Requests enabling of the accessibility settings.
- 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:4470