ermac | 54cae24056fcd10bfc1277d5c363d6bec6a1184124137cc596604b6ad60e86cd

Analysis

max time kernel
174s
max time network
183s
platform
android_x64
resource
android-x64-arm64-20240611.1-en
resource tags

androidarch:armarch:arm64arch:x64arch:x86image:android-x64-arm64-20240611.1-enlocale:en-usos:android-11-x64system
submitted
12-06-2024 16:04

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General

Target

54cae24056fcd10bfc1277d5c363d6bec6a1184124137cc596604b6ad60e86cd.apk
Size

2.4MB
MD5

a83b64e2f379adef9d9be35053476de3
SHA1

a00f24260f7aa490e2f1b8a72cbf6ba8547a3b19
SHA256

54cae24056fcd10bfc1277d5c363d6bec6a1184124137cc596604b6ad60e86cd
SHA512

04ab5258ab816f0d3917717b30dfe0820dfc73ed9d8a842c6f1746a6e8d1ca89a322678661ed4c9eaee1472b3c15bf24bea9409a70d4920a9ea7e561019e8dba
SSDEEP

49152:ZGsqm0IFKNgCMG6NOf1CIfZeWYhwYlWK8wfDJ8ol6qNUB05dj1g/9I:ZGFm0QKNgCuNO991Y8K8SDibqCm5d8I

Score

10^/10

ermac banker collection credential_access discovery evasion impact infostealer persistence stealth trojan

Malware Config

Extracted

Family

ermac

https://www.virustotal.com

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
4691	com.fewujoyiliwoyi.kacero

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.fewujoyiliwoyi.kacero
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText	com.fewujoyiliwoyi.kacero
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfoByAccessibilityId	com.fewujoyiliwoyi.kacero

Obtains sensitive information copied to the device clipboard 2 TTPs 1 IoCs

Application may abuse the framework's APIs to obtain sensitive information copied to the device clipboard.

collection credential_access impact

Clipboard Data

T1414

Transmitted Data Manipulation

T1641.001

description	ioc	Process
Framework service call	android.content.IClipboard.addPrimaryClipChangedListener	com.fewujoyiliwoyi.kacero

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.fewujoyiliwoyi.kacero

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.fewujoyiliwoyi.kacero

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.fewujoyiliwoyi.kacero
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.fewujoyiliwoyi.kacero
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.fewujoyiliwoyi.kacero
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.fewujoyiliwoyi.kacero
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.fewujoyiliwoyi.kacero

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.fewujoyiliwoyi.kacero

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.fewujoyiliwoyi.kacero

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.fewujoyiliwoyi.kacero

Checks CPU information 2 TTPs 1 IoCs

System Checks

T1633.001

System Information Discovery

T1426

description	ioc	Process
File opened for read	/proc/cpuinfo	com.fewujoyiliwoyi.kacero

Checks memory information 2 TTPs 1 IoCs

System Checks

T1633.001

System Information Discovery

T1426

description	ioc	Process
File opened for read	/proc/meminfo	com.fewujoyiliwoyi.kacero

com.fewujoyiliwoyi.kacero
1⤵
- Removes its main activity from the application launcher
- Makes use of the framework's Accessibility service
- Obtains sensitive information copied to the device clipboard
- 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)
- Checks CPU information
- Checks memory information
PID:4691