Analysis Overview
SHA256
c4540c227faaa119805339efd1e0a1abb22772b9af20234ee9087c1c4e51c14c
Threat Level: Known bad
The file c4540c227faaa119805339efd1e0a1abb22772b9af20234ee9087c1c4e51c14c.bin was found to be: Known bad.
Malicious Activity Summary
Ermac family
Ermac2 payload
Ermac
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
Queries the phone number (MSISDN for GSM devices)
Declares services with permission to bind to the system
Acquires the wake lock
Queries the unique device ID (IMEI, MEID, IMSI)
Requests disabling of battery optimizations (often used to enable hiding in the background).
Reads information about phone network operator.
Declares broadcast receivers with permission to handle system events
Requests dangerous framework permissions
Uses Crypto APIs (Might try to encrypt user data)
MITRE ATT&CK Matrix
Analysis: static1
Detonation Overview
Reported
2024-04-16 22:03
Signatures
Ermac family
Ermac2 payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Declares broadcast receivers with permission to handle system events
| Description | Indicator | Process | Target |
| Required by device admin receivers to bind with the system. Allows apps to manage device administration features. | android.permission.BIND_DEVICE_ADMIN | N/A | N/A |
Declares services with permission to bind to the system
| Description | Indicator | Process | Target |
| Required by accessibility services to bind with the system. Allows apps to access accessibility features. | android.permission.BIND_ACCESSIBILITY_SERVICE | N/A | N/A |
Requests dangerous framework permissions
| Description | Indicator | Process | Target |
| Allows an application to request installing packages. | android.permission.REQUEST_INSTALL_PACKAGES | N/A | N/A |
| Allows an application to initiate a phone call without going through the Dialer user interface for the user to confirm the call. | android.permission.CALL_PHONE | N/A | N/A |
| Allows an application to receive SMS messages. | android.permission.RECEIVE_SMS | N/A | N/A |
| Allows an application to read SMS messages. | android.permission.READ_SMS | N/A | N/A |
| Allows an application to send SMS messages. | android.permission.SEND_SMS | N/A | N/A |
| Allows an application to read the user's contacts data. | android.permission.READ_CONTACTS | N/A | N/A |
| Allows access to the list of accounts in the Accounts Service. | android.permission.GET_ACCOUNTS | N/A | N/A |
| Allows read only access to phone state, including the current cellular network information, the status of any ongoing calls, and a list of any PhoneAccounts registered on the device. | android.permission.READ_PHONE_STATE | N/A | N/A |
| Allows read access to the device's phone number(s). | android.permission.READ_PHONE_NUMBERS | N/A | N/A |
| Allows an app to create windows using the type LayoutParams.TYPE_APPLICATION_OVERLAY, shown on top of all other apps. | android.permission.SYSTEM_ALERT_WINDOW | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-04-16 22:03
Reported
2024-04-16 22:19
Platform
android-x86-arm-20240221-en
Max time kernel
149s
Max time network
149s
Command Line
Signatures
Ermac
Makes use of the framework's Accessibility service
| Description | Indicator | Process | Target |
| Framework service call | android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfoByAccessibilityId | N/A | N/A |
| Framework service call | android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId | N/A | N/A |
| Framework service call | android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText | N/A | N/A |
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
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Checks CPU information
| Description | Indicator | Process | Target |
| File opened for read | /proc/cpuinfo | N/A | N/A |
Checks memory information
| Description | Indicator | Process | Target |
| File opened for read | /proc/meminfo | N/A | N/A |
Makes use of the framework's foreground persistence service
| Description | Indicator | Process | Target |
| Framework service call | android.app.IActivityManager.setServiceForeground | N/A | N/A |
Acquires the wake lock
| Description | Indicator | Process | Target |
| Framework service call | android.os.IPowerManager.acquireWakeLock | N/A | N/A |
Queries the unique device ID (IMEI, MEID, IMSI)
Requests disabling of battery optimizations (often used to enable hiding in the background).
| Description | Indicator | Process | Target |
| Intent action | android.settings.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS | N/A | N/A |
Uses Crypto APIs (Might try to encrypt user data)
| Description | Indicator | Process | Target |
| Framework API call | javax.crypto.Cipher.doFinal | N/A | N/A |
Processes
nusku.ermacv2.apk
Network
| Country | Destination | Domain | Proto |
| N/A | 224.0.0.251:5353 | udp | |
| US | 1.1.1.1:53 | semanticlocation-pa.googleapis.com | udp |
| GB | 142.250.200.42:443 | semanticlocation-pa.googleapis.com | tcp |
| DE | 173.212.219.194:3434 | 173.212.219.194 | tcp |
| GB | 142.250.178.14:443 | tcp | |
| US | 1.1.1.1:53 | android.apis.google.com | udp |
| GB | 216.58.204.78:443 | android.apis.google.com | tcp |
| GB | 142.250.200.42:443 | semanticlocation-pa.googleapis.com | tcp |
Files
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-16 22:03
Reported
2024-04-16 22:17
Platform
android-x64-20240221-en
Max time kernel
30s
Max time network
149s
Command Line
Signatures
Ermac
Makes use of the framework's Accessibility service
| Description | Indicator | Process | Target |
| Framework service call | android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfoByAccessibilityId | N/A | N/A |
| Framework service call | android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId | N/A | N/A |
| Framework service call | android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText | N/A | N/A |
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
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Checks CPU information
| Description | Indicator | Process | Target |
| File opened for read | /proc/cpuinfo | N/A | N/A |
Checks memory information
| Description | Indicator | Process | Target |
| File opened for read | /proc/meminfo | N/A | N/A |
Makes use of the framework's foreground persistence service
| Description | Indicator | Process | Target |
| Framework service call | android.app.IActivityManager.setServiceForeground | N/A | N/A |
Queries the phone number (MSISDN for GSM devices)
Acquires the wake lock
| Description | Indicator | Process | Target |
| Framework service call | android.os.IPowerManager.acquireWakeLock | N/A | N/A |
Queries the unique device ID (IMEI, MEID, IMSI)
Reads information about phone network operator.
Uses Crypto APIs (Might try to encrypt user data)
| Description | Indicator | Process | Target |
| Framework API call | javax.crypto.Cipher.doFinal | N/A | N/A |
Processes
nusku.ermacv2.apk
Network
| Country | Destination | Domain | Proto |
| N/A | 224.0.0.251:5353 | udp | |
| US | 1.1.1.1:53 | ssl.google-analytics.com | udp |
| DE | 173.212.219.194:3434 | 173.212.219.194 | tcp |
| GB | 216.58.204.72:443 | ssl.google-analytics.com | tcp |
| GB | 142.250.178.14:443 | tcp | |
| US | 1.1.1.1:53 | android.apis.google.com | udp |
| GB | 142.250.179.238:443 | android.apis.google.com | tcp |
| GB | 142.250.187.238:443 | tcp | |
| GB | 142.250.200.2:443 | tcp | |
| GB | 142.250.178.3:443 | tcp | |
| GB | 142.250.178.3:443 | tcp | |
| GB | 216.58.204.68:443 | tcp | |
| US | 1.1.1.1:53 | www.google.com | udp |
| GB | 142.250.187.196:443 | www.google.com | tcp |
| US | 1.1.1.1:53 | g.tenor.com | udp |
| GB | 216.58.201.106:443 | g.tenor.com | tcp |
| DE | 173.212.219.194:3434 | 173.212.219.194 | tcp |
| GB | 216.58.201.106:443 | g.tenor.com | tcp |
Files
Analysis: behavioral3
Detonation Overview
Submitted
2024-04-16 22:03
Reported
2024-04-16 22:18
Platform
android-x64-arm64-20240221-en
Max time kernel
163s
Max time network
164s
Command Line
Signatures
Ermac
Makes use of the framework's Accessibility service
| Description | Indicator | Process | Target |
| Framework service call | android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText | N/A | N/A |
| Framework service call | android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfoByAccessibilityId | N/A | N/A |
| Framework service call | android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId | N/A | N/A |
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
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Checks CPU information
| Description | Indicator | Process | Target |
| File opened for read | /proc/cpuinfo | N/A | N/A |
Checks memory information
| Description | Indicator | Process | Target |
| File opened for read | /proc/meminfo | N/A | N/A |
Makes use of the framework's foreground persistence service
| Description | Indicator | Process | Target |
| Framework service call | android.app.IActivityManager.setServiceForeground | N/A | N/A |
Queries the phone number (MSISDN for GSM devices)
Acquires the wake lock
| Description | Indicator | Process | Target |
| Framework service call | android.os.IPowerManager.acquireWakeLock | N/A | N/A |
Queries the unique device ID (IMEI, MEID, IMSI)
Reads information about phone network operator.
Requests disabling of battery optimizations (often used to enable hiding in the background).
| Description | Indicator | Process | Target |
| Intent action | android.settings.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS | N/A | N/A |
Uses Crypto APIs (Might try to encrypt user data)
| Description | Indicator | Process | Target |
| Framework API call | javax.crypto.Cipher.doFinal | N/A | N/A |
Processes
nusku.ermacv2.apk
Network
| Country | Destination | Domain | Proto |
| GB | 142.250.200.14:443 | tcp | |
| GB | 142.250.200.14:443 | tcp | |
| GB | 142.250.200.14:443 | tcp | |
| N/A | 224.0.0.251:5353 | udp | |
| GB | 216.58.213.14:443 | udp | |
| US | 1.1.1.1:53 | android.apis.google.com | udp |
| GB | 172.217.16.238:443 | android.apis.google.com | tcp |
| DE | 173.212.219.194:3434 | 173.212.219.194 | tcp |
| US | 1.1.1.1:53 | ssl.google-analytics.com | udp |
| GB | 172.217.169.40:443 | ssl.google-analytics.com | tcp |
| GB | 142.250.200.36:443 | tcp | |
| GB | 142.250.200.36:443 | tcp |