ermac | 329d1f03c5e00adc45f99f2fb88c8f94a3033688b39a8fbd80fa0644f845a088

Analysis

max time kernel
177s
max time network
186s
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
18-06-2024 22:52

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

329d1f03c5e00adc45f99f2fb88c8f94a3033688b39a8fbd80fa0644f845a088.apk
Size

2.5MB
MD5

e1436fe10b569b80654d9574777fea4f
SHA1

381084e63f33aa090812a49fb2d66dc935207414
SHA256

329d1f03c5e00adc45f99f2fb88c8f94a3033688b39a8fbd80fa0644f845a088
SHA512

6a8e009dcb6745b7ee56fa3abcb8e97f626f8a212ebbfc06f2688b7fee27465d796c42a4f2555db6b567e42c3fc46ccbe9d9fa7ebecc0cdb348e0ba158722383
SSDEEP

49152:e4xgYnm9ua3CqKxv6CHtmgqFSjuLMeRGe+xmoG0PdfNg/HZ:e4xgYm9ua3CqKxvVqFSjuXr+6SdsZ

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 2 IoCs

stealth trojan evasion

Suppress Application Icon

T1628.001

pid	Process
4470	com.cokunuceruva.wilusu
4470	com.cokunuceruva.wilusu

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.cokunuceruva.wilusu
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId	com.cokunuceruva.wilusu
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText	com.cokunuceruva.wilusu

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.cokunuceruva.wilusu

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.cokunuceruva.wilusu

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.cokunuceruva.wilusu

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.cokunuceruva.wilusu
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.cokunuceruva.wilusu
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.cokunuceruva.wilusu
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.cokunuceruva.wilusu
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.cokunuceruva.wilusu

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.cokunuceruva.wilusu

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.cokunuceruva.wilusu

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.cokunuceruva.wilusu

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.cokunuceruva.wilusu

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.cokunuceruva.wilusu

com.cokunuceruva.wilusu
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:4470