Analysis Overview
SHA256
26f0a9ba3832d464e2b26ad4f30b0e431221fbb99081ec0c833fa00976446023
Threat Level: Known bad
The file KrinkoOp.apk was found to be: Known bad.
Malicious Activity Summary
Spynote family
Spynote payload
Makes use of the framework's Accessibility service
Requests dangerous framework permissions
Makes use of the framework's foreground persistence service
Declares broadcast receivers with permission to handle system events
Declares services with permission to bind to the system
Acquires the wake lock
Attempts to obfuscate APK file format
Schedules tasks to execute at a specified time
Registers a broadcast receiver at runtime (usually for listening for system events)
MITRE ATT&CK
Mobile Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-08-08 10:33
Signatures
Spynote family
Spynote payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Attempts to obfuscate APK file format
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 |
| Required by VPN services to bind with the system. Allows apps to provision VPN services. | android.permission.BIND_VPN_SERVICE | N/A | N/A |
| Required by input method services to bind with the system. Allows apps to provide custom input methods (keyboards). | android.permission.BIND_INPUT_METHOD | N/A | N/A |
Requests dangerous framework permissions
| Description | Indicator | Process | Target |
| Allows an application to read from external storage. | android.permission.READ_EXTERNAL_STORAGE | N/A | N/A |
| Allows an application to write to external storage. | android.permission.WRITE_EXTERNAL_STORAGE | N/A | N/A |
| Allows an application to request installing packages. | android.permission.REQUEST_INSTALL_PACKAGES | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-08-08 10:33
Reported
2024-08-08 10:35
Platform
android-x86-arm-20240624-en
Max time kernel
40s
Max time network
35s
Command Line
Signatures
Registers a broadcast receiver at runtime (usually for listening for system events)
| Description | Indicator | Process | Target |
| Framework service call | android.app.IActivityManager.registerReceiver | N/A | N/A |
Processes
com.appd.instll.load
Network
| Country | Destination | Domain | Proto |
| N/A | 224.0.0.251:5353 | udp | |
| GB | 142.250.200.42:443 | tcp | |
| US | 1.1.1.1:53 | semanticlocation-pa.googleapis.com | udp |
| US | 1.1.1.1:53 | semanticlocation-pa.googleapis.com | udp |
| GB | 172.217.169.42:443 | semanticlocation-pa.googleapis.com | tcp |
| GB | 216.58.204.78:443 | tcp | |
| US | 1.1.1.1:53 | android.apis.google.com | udp |
| GB | 216.58.212.206:443 | android.apis.google.com | tcp |
| GB | 142.250.179.234:443 | semanticlocation-pa.googleapis.com | tcp |
Files
Analysis: behavioral2
Detonation Overview
Submitted
2024-08-08 10:33
Reported
2024-08-08 10:37
Platform
android-x86-arm-20240624-en
Max time kernel
179s
Max time network
166s
Command Line
Signatures
Makes use of the framework's Accessibility service
| Description | Indicator | Process | Target |
| Framework service call | android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfoByAccessibilityId | N/A | N/A |
Acquires the wake lock
| Description | Indicator | Process | Target |
| Framework service call | android.os.IPowerManager.acquireWakeLock | 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 |
Registers a broadcast receiver at runtime (usually for listening for system events)
| Description | Indicator | Process | Target |
| Framework service call | android.app.IActivityManager.registerReceiver | N/A | N/A |
Schedules tasks to execute at a specified time
| Description | Indicator | Process | Target |
| Framework service call | android.app.job.IJobScheduler.schedule | N/A | N/A |
Processes
tim.hd.they
Network
| Country | Destination | Domain | Proto |
| N/A | 224.0.0.251:5353 | udp | |
| GB | 142.250.200.42:443 | tcp | |
| US | 1.1.1.1:53 | semanticlocation-pa.googleapis.com | udp |
| US | 147.185.221.17:59471 | tcp | |
| GB | 216.58.204.78:443 | tcp | |
| US | 1.1.1.1:53 | android.apis.google.com | udp |
| GB | 142.250.187.238:443 | android.apis.google.com | tcp |
| US | 147.185.221.17:59471 | tcp | |
| US | 147.185.221.17:59471 | tcp |
Files
/storage/emulated/0/Config/sys/apps/log/log-2024-08-08.txt
| MD5 | de2c41a51ee9246eb1708f65b511add0 |
| SHA1 | 2f442d634c8a18760a232c8829d4b5d74a52f074 |
| SHA256 | ad2d914ca347cd1930e32f21c6d5448c34104bea181b93abc85ec518985653ab |
| SHA512 | 7cdfbd001594503644e9ed80ae852f90ef9e841a8382e2eec6979e149a2c400a3b83055d205b4d1d66e1600e5127482932d5127eb5800d35a4ee5673fe34d84a |
/storage/emulated/0/Config/sys/apps/log/log-2024-08-08.txt
| MD5 | 33053d22916825e664d8d30a2f82d4f3 |
| SHA1 | 6ae200c9a36a3a53e4ce4cbdb49db4a147855903 |
| SHA256 | 6ec1087b27195f5a7e4116cee1254df5259fb824f8683953eb427035d081957b |
| SHA512 | 52d6d1b80f32fc9a2ed9289bb103ab20b17f1b9883ab684fd851ff78da9e2e28f92c9c8599792ca7f4faecc7060df4d487d13af11614bd0a60b65a1c15d37331 |
/storage/emulated/0/Config/sys/apps/log/log-2024-08-08.txt
| MD5 | 73796bbdf5efd7eb9751ebcb49a534f2 |
| SHA1 | cdae49b5d77ce9504cfa959e3c80859b5614f7cf |
| SHA256 | 3980309558e204ff9cf530ce79da2d6e72dafe5ed02a4a028cfe0d305c798df1 |
| SHA512 | d79be30e8ddb39156cfd6c28c93df8e95107a39cf92d24e43ebb83f19d419c390d0541d59af8fe35e57198ac3934e96ad60f3f637c1b0112b7722b551d8491a3 |
/storage/emulated/0/Config/sys/apps/log/log-2024-08-08.txt
| MD5 | bdb821a955117250611e94cd23842584 |
| SHA1 | 81edcea1b44f94cfc140710c8410d0696b760c67 |
| SHA256 | 076eb89055ff3d929eb732e1002a0105652e628682a741151388ce1df3b6ec9d |
| SHA512 | e52ffed4ee84acc414c530c239c8876d9e99c1f2b2c7626c0ed7fbe0c59b9cb8f8a5e9e983541bea3dfdb849dd3b9593df054c2482ed8bcda7c70ebd960ca268 |