83070bea9d0550cc6d23ac82142c7418cb6f62edd809187704058db39f18c297

ioc	Process
/data/local/su	com.esbook.reader
/data/local/bin/su	com.esbook.reader
/data/local/xbin/su	com.esbook.reader
/sbin/su	com.esbook.reader

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

Checks CPU information 2 TTPs 1 IoCs

Checks CPU information which indicate if the system is an emulator.

evasion discovery

System Checks

T1633.001

System Information Discovery

description	ioc	Process
File opened for read	/proc/cpuinfo	com.esbook.reader

Checks memory information 2 TTPs 1 IoCs

Checks memory information which indicate if the system is an emulator.

evasion discovery

System Checks

T1633.001

System Information Discovery

description	ioc	Process
File opened for read	/proc/meminfo	com.esbook.reader

Loads dropped Dex/Jar 1 TTPs 9 IoCs

Runs executable file dropped to the device during analysis.

evasion

Download New Code at Runtime

T1407

ioc	pid	Process
/data/data/com.esbook.reader/.jiagu/classes.dex	4275	com.esbook.reader
/data/data/com.esbook.reader/.jiagu/classes.dex!classes2.dex	4275	com.esbook.reader
/data/data/com.esbook.reader/.jiagu/tmp.dex	4275	com.esbook.reader
/data/data/com.esbook.reader/.jiagu/tmp.dex	4309	/system/bin/dex2oat --instruction-set=x86 --instruction-set-features=ssse3,-sse4.1,-sse4.2,-avx,-avx2,-popcnt --runtime-arg -Xhidden-api-checks --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --instruction-set-variant=x86 --instruction-set-features=default --inline-max-code-units=0 --compact-dex-level=none --dex-file=/data/data/com.esbook.reader/.jiagu/tmp.dex --output-vdex-fd=42 --oat-fd=43 --oat-location=/data/data/com.esbook.reader/.jiagu/oat/x86/tmp.odex --compiler-filter=quicken --class-loader-context=&
/data/data/com.esbook.reader/.jiagu/tmp.dex	4275	com.esbook.reader
/data/data/com.esbook.reader/.jiagu/classes.dex	4336	com.esbook.reader:GuardService
/data/data/com.esbook.reader/.jiagu/classes.dex!classes2.dex	4336	com.esbook.reader:GuardService
/data/data/com.esbook.reader/.jiagu/tmp.dex	4336	com.esbook.reader:GuardService
/data/data/com.esbook.reader/.jiagu/tmp.dex	4336	com.esbook.reader:GuardService

Queries information about running processes on the device 1 TTPs 2 IoCs

Application may abuse the framework's APIs to collect information about running processes on the device.

Process Discovery

T1424

description	ioc	Process
Framework service call	android.app.IActivityManager.getRunningAppProcesses	com.esbook.reader:GuardService
Framework service call	android.app.IActivityManager.getRunningAppProcesses	com.esbook.reader

Queries information about the current Wi-Fi connection 1 TTPs 1 IoCs

Application may abuse the framework's APIs to collect information about the current Wi-Fi connection.

System Network Connections Discovery

description	ioc	Process
Framework service call	android.net.wifi.IWifiManager.getConnectionInfo	com.esbook.reader

Queries information about the current nearby Wi-Fi networks 1 TTPs 1 IoCs

Application may abuse the framework's APIs to collect information about the current nearby Wi-Fi networks.

System Network Connections Discovery

description	ioc	Process
Framework service call	android.net.wifi.IWifiManager.getScanResults	com.esbook.reader

Queries the phone number (MSISDN for GSM devices) 1 TTPs
discovery

System Network Configuration Discovery
T1422

Registers a broadcast receiver at runtime (usually for listening for system events) 1 TTPs 2 IoCs

persistence

Broadcast Receivers

T1624.001

description	ioc	Process
Framework service call	android.app.IActivityManager.registerReceiver	com.esbook.reader
Framework service call	android.app.IActivityManager.registerReceiver	com.esbook.reader:GuardService

Checks if the internet connection is available 1 TTPs 2 IoCs

System Network Connections Discovery

description	ioc	Process
Framework service call	android.net.IConnectivityManager.getActiveNetworkInfo	com.esbook.reader
Framework service call	android.net.IConnectivityManager.getActiveNetworkInfo	com.esbook.reader:GuardService

Requests dangerous framework permissions 6 IoCs

description	ioc
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
Allows an app to access approximate location.	android.permission.ACCESS_COARSE_LOCATION
Allows an application to send SMS messages.	android.permission.SEND_SMS
Allows an application to read SMS messages.	android.permission.READ_SMS
Allows an application to write to external storage.	android.permission.WRITE_EXTERNAL_STORAGE
Allows an app to access precise location.	android.permission.ACCESS_FINE_LOCATION

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.esbook.reader

com.esbook.reader
1⤵
- Checks if the Android device is rooted.
- Checks CPU information
- Checks memory information
- Loads dropped Dex/Jar
- Queries information about running processes on the device
- Queries information about the current Wi-Fi connection
- Queries information about the current nearby Wi-Fi networks
- Registers a broadcast receiver at runtime (usually for listening for system events)
- Checks if the internet connection is available
- Uses Crypto APIs (Might try to encrypt user data)
PID:4275
- /system/bin/dex2oat --instruction-set=x86 --instruction-set-features=ssse3,-sse4.1,-sse4.2,-avx,-avx2,-popcnt --runtime-arg -Xhidden-api-checks --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --instruction-set-variant=x86 --instruction-set-features=default --inline-max-code-units=0 --compact-dex-level=none --dex-file=/data/data/com.esbook.reader/.jiagu/tmp.dex --output-vdex-fd=42 --oat-fd=43 --oat-location=/data/data/com.esbook.reader/.jiagu/oat/x86/tmp.odex --compiler-filter=quicken --class-loader-context=&
  2⤵
  - Loads dropped Dex/Jar
  PID:4309
- logcat *:e *:w | grep "(4275)"
  2⤵
  PID:4468
- sh -c ps
  2⤵
  PID:4583
- ps
  2⤵
  PID:4583
- cat /sys/class/net/wlan0/address
  2⤵
  PID:4777

com.esbook.reader:GuardService
1⤵
- Loads dropped Dex/Jar
- Queries information about running processes on the device
- Registers a broadcast receiver at runtime (usually for listening for system events)
- Checks if the internet connection is available
PID:4336

Network

MITRE ATT&CK Mobile v15

Initial Access

Execution

Persistence

Event Triggered Execution

T1624

Broadcast Receivers

T1624.001

Privilege Escalation

Defense Evasion

Download New Code at Runtime

T1407

Virtualization/Sandbox Evasion

T1633

System Checks

T1633.001

Credential Access

Discovery

Process Discovery

T1424

Software Discovery

T1418

Security Software Discovery

T1418.001

System Information Discovery

System Network Configuration Discovery

T1422

System Network Connections Discovery