ermac | 892f87699be7df7c984c2c0973e2052b780f00c25eee93f5a81f4151e3cfed83

Analysis

max time kernel
177s
max time network
182s
platform
android_x86
resource
android-x86-arm-20240611.1-en
resource tags

androidarch:armarch:x86image:android-x86-arm-20240611.1-enlocale:en-usos:android-9-x86system
submitted
18-06-2024 22:56

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General

Target

892f87699be7df7c984c2c0973e2052b780f00c25eee93f5a81f4151e3cfed83.apk
Size

987KB
MD5

440b3701ab7d41c43fa14ed9e74ffbb3
SHA1

5469c4d055dde51d086b9855eb8c7151dc2bdb70
SHA256

892f87699be7df7c984c2c0973e2052b780f00c25eee93f5a81f4151e3cfed83
SHA512

39e150e3445b3e6de6f8f4d8ee00f054299e059b678bcf0b73353645685568e959289199e7c479faf5569d56ab90953877e1be42def6ddc7826a719a7a23f8e4
SSDEEP

12288:I6rOKoRC8/jcd57jrSZGI2VbydyK/BT0dgxmwOAkASwuop3dS+gicjgA4qDXroc/:I6SK38/oBMyCZ0+kjhozSR/jg/Koc/

Score

10^/10

ermac banker collection credential_access discovery evasion impact infostealer persistence stealth trojan

Malware Config

Extracted

Family

ermac

http://94.156.8.11:3434

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
4170	com.ciwokucazapejeto.zanu

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.ciwokucazapejeto.zanu
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId	com.ciwokucazapejeto.zanu
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText	com.ciwokucazapejeto.zanu

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.ciwokucazapejeto.zanu

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.ciwokucazapejeto.zanu

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.ciwokucazapejeto.zanu
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.ciwokucazapejeto.zanu
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.ciwokucazapejeto.zanu
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.ciwokucazapejeto.zanu
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.ciwokucazapejeto.zanu

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.ciwokucazapejeto.zanu

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.ciwokucazapejeto.zanu

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.ciwokucazapejeto.zanu

com.ciwokucazapejeto.zanu
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:4170