ermac | 42a60deafc871061e3acc0ac608755bfb50d9fbf22db5648ccc4c04433dad9c7

Analysis

max time kernel
149s
max time network
145s
platform
android_x86
resource
android-x86-arm-20240221-en
resource tags

androidarch:armarch:x86image:android-x86-arm-20240221-enlocale:en-usos:android-9-x86system
submitted
10-04-2024 22:02

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General

Target

42a60deafc871061e3acc0ac608755bfb50d9fbf22db5648ccc4c04433dad9c7.apk
Size

1.1MB
MD5

d367296fe036fac40f7abc41ca01b52b
SHA1

cea57211251a5c869ccaca35800d96278a91d013
SHA256

42a60deafc871061e3acc0ac608755bfb50d9fbf22db5648ccc4c04433dad9c7
SHA512

00419bfda0cd3703baab05bd0c1d7c8f5c907b3fc18d3ee6a8af02458f9c370fc6ecf82bc98447f8b2107d941d9f2fb0bf1d3588877baa91c89e6a6987c38cc6
SSDEEP

24576:K+kksh6HtHN6oQyVvyztoDCgS/U9uvnbCfY2+LvFqrQ:K+qwHN6oQyetwCgSYujCfN+L9qrQ

Score

10^/10

ermac banker collection discovery evasion infostealer persistence stealth trojan

Malware Config

Extracted

Family

ermac

http://173.212.219.194:3434

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	kader.inatbox.apk
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId	kader.inatbox.apk
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText	kader.inatbox.apk

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	kader.inatbox.apk

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

stealth trojan evasion

Suppress Application Icon

T1628.001

pid	Process
4238	kader.inatbox.apk

Checks CPU information 2 TTPs 1 IoCs

Checks CPU information which indicate if the system is an emulator.

evasion discovery

System Checks

T1633.001

System Information Discovery

T1426

description	ioc	Process
File opened for read	/proc/cpuinfo	kader.inatbox.apk

Checks memory information 2 TTPs 1 IoCs

Checks memory information which indicate if the system is an emulator.

evasion discovery

System Checks

T1633.001

System Information Discovery

T1426

description	ioc	Process
File opened for read	/proc/meminfo	kader.inatbox.apk

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	kader.inatbox.apk

Acquires the wake lock 1 IoCs

description	ioc	Process
Framework service call	android.os.IPowerManager.acquireWakeLock	kader.inatbox.apk

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	kader.inatbox.apk

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

description	ioc	Process
Framework API call	javax.crypto.Cipher.doFinal	kader.inatbox.apk

kader.inatbox.apk
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
- Checks CPU information
- Checks memory information
- Makes use of the framework's foreground persistence service
- 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:4238