Malware Analysis Report

2025-08-10 16:44

Sample ID 241014-vx752swhjf
Target excess.undrilled.improper.crushing.apk
SHA256 136d00629e8cd59a6be639b0eaef925fd8cd68cbcbdb71a3a407836c560b8579
Tags
collection credential_access discovery evasion impact persistence stealth trojan
score
8/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Mobile Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
8/10

SHA256

136d00629e8cd59a6be639b0eaef925fd8cd68cbcbdb71a3a407836c560b8579

Threat Level: Likely malicious

The file excess.undrilled.improper.crushing.apk was found to be: Likely malicious.

Malicious Activity Summary

collection credential_access discovery evasion impact persistence stealth trojan

Removes its main activity from the application launcher

Makes use of the framework's Accessibility service

Queries the phone number (MSISDN for GSM devices)

Loads dropped Dex/Jar

Obtains sensitive information copied to the device clipboard

Requests dangerous framework permissions

Reads information about phone network operator.

Requests disabling of battery optimizations (often used to enable hiding in the background).

Declares services with permission to bind to the system

Makes use of the framework's foreground persistence service

Performs UI accessibility actions on behalf of the user

Queries the mobile country code (MCC)

Registers a broadcast receiver at runtime (usually for listening for system events)

Checks CPU information

Checks memory information

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-14 17:23

Signatures

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
Required to be able to connect to paired Bluetooth devices. android.permission.BLUETOOTH_CONNECT 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 post notifications. android.permission.POST_NOTIFICATIONS N/A N/A
Allows an application to send SMS messages. android.permission.SEND_SMS 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 an application to read the user's contacts data. android.permission.READ_CONTACTS N/A N/A
Allows applications to use exact alarm APIs. android.permission.SCHEDULE_EXACT_ALARM 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 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 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 a broad access to external storage in scoped storage. android.permission.MANAGE_EXTERNAL_STORAGE N/A N/A
Allows an application to read or write the system settings. android.permission.WRITE_SETTINGS N/A N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-14 17:23

Reported

2024-10-14 17:24

Platform

android-33-x64-arm64-20240624-en

Max time kernel

27s

Max time network

36s

Command Line

excess.undrilled.improper.crushing

Signatures

Loads dropped Dex/Jar

evasion
Description Indicator Process Target
N/A /data/data/excess.undrilled.improper.crushing/code_cache/decrypted.dex N/A N/A
N/A /data/data/excess.undrilled.improper.crushing/code_cache/decrypted.dex N/A N/A

Makes use of the framework's Accessibility service

collection evasion credential_access
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

Obtains sensitive information copied to the device clipboard

collection credential_access impact
Description Indicator Process Target
Framework service call android.content.IClipboard.addPrimaryClipChangedListener N/A N/A

Queries the phone number (MSISDN for GSM devices)

discovery

Makes use of the framework's foreground persistence service

evasion persistence
Description Indicator Process Target
Framework service call android.app.IActivityManager.setServiceForeground N/A N/A

Performs UI accessibility actions on behalf of the user

evasion
Description Indicator Process Target
N/A android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction N/A N/A
N/A android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction N/A N/A
N/A android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction N/A N/A
N/A android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction N/A N/A
N/A android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction N/A N/A

Reads information about phone network operator.

discovery

Requests disabling of battery optimizations (often used to enable hiding in the background).

evasion
Description Indicator Process Target
Intent action android.settings.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS 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

Processes

excess.undrilled.improper.crushing

excess.undrilled.improper.crushing:webview_process

Network

Country Destination Domain Proto
GB 216.58.201.100:443 udp
N/A 224.0.0.251:5353 udp
GB 216.58.201.100:443 tcp
GB 216.58.201.100:443 tcp
GB 216.58.204.78:443 tcp
GB 216.58.204.78:443 tcp
US 1.1.1.1:53 cmsspain.homes udp
US 1.1.1.1:53 cmsspain.homes udp
US 1.1.1.1:53 4665e98d65bbac5.homes udp
US 1.1.1.1:53 4665e98d65bbac5.net udp
US 1.1.1.1:53 4665e98d65bbac5.click udp
US 1.1.1.1:53 4665e98d65bbac5.com udp

Files

/data/data/excess.undrilled.improper.crushing/code_cache/decrypted.dex

MD5 dfde1000d6b51cdc38b21ac5fbaa462a
SHA1 8389cd13c15f316d55f7909e6ae71f56dfa8ea1b
SHA256 09e3db729b16cf271d9be99996334422b372bafaae9ba95f65828c5b2bc97d34
SHA512 3f11d6d1c0f4063bb79771834959e8a9d10b7210138fbde88fdf504138ff74c4467b1ca746e341b845ebd10ceb82a122386c1f4f57e2a1ea33f1d51063b08038

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-14 17:23

Reported

2024-10-14 17:23

Platform

android-x86-arm-20240624-en

Max time kernel

24s

Max time network

34s

Command Line

excess.undrilled.improper.crushing

Signatures

Removes its main activity from the application launcher

stealth trojan evasion
Description Indicator Process Target
N/A N/A N/A N/A

Loads dropped Dex/Jar

evasion
Description Indicator Process Target
N/A /data/data/excess.undrilled.improper.crushing/code_cache/decrypted.dex N/A N/A
N/A /data/data/excess.undrilled.improper.crushing/code_cache/decrypted.dex N/A N/A
N/A /data/data/excess.undrilled.improper.crushing/code_cache/decrypted.dex N/A N/A
N/A /data/data/excess.undrilled.improper.crushing/code_cache/decrypted.dex N/A N/A
N/A /data/data/excess.undrilled.improper.crushing/code_cache/decrypted.dex N/A N/A

Makes use of the framework's Accessibility service

collection evasion credential_access
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

Queries the phone number (MSISDN for GSM devices)

discovery

Makes use of the framework's foreground persistence service

evasion persistence
Description Indicator Process Target
Framework service call android.app.IActivityManager.setServiceForeground N/A N/A

Performs UI accessibility actions on behalf of the user

evasion
Description Indicator Process Target
N/A android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction N/A N/A
N/A android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction N/A N/A
N/A android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction N/A N/A
N/A android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction N/A N/A
N/A android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction N/A N/A

Queries the mobile country code (MCC)

discovery
Description Indicator Process Target
Framework service call com.android.internal.telephony.ITelephony.getNetworkCountryIsoForPhone N/A N/A

Reads information about phone network operator.

discovery

Requests disabling of battery optimizations (often used to enable hiding in the background).

evasion
Description Indicator Process Target
Intent action android.settings.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS N/A N/A

Registers a broadcast receiver at runtime (usually for listening for system events)

persistence
Description Indicator Process Target
Framework service call android.app.IActivityManager.registerReceiver N/A N/A
Framework service call android.app.IActivityManager.registerReceiver 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

Processes

excess.undrilled.improper.crushing

/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/excess.undrilled.improper.crushing/code_cache/decrypted.dex --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/data/excess.undrilled.improper.crushing/code_cache/oat/x86/decrypted.odex --compiler-filter=quicken --class-loader-context=&

excess.undrilled.improper.crushing:webview_process

Network

Country Destination Domain Proto
N/A 224.0.0.251:5353 udp
GB 142.250.187.202:443 tcp
US 1.1.1.1:53 semanticlocation-pa.googleapis.com udp
US 1.1.1.1:53 semanticlocation-pa.googleapis.com udp
US 1.1.1.1:53 semanticlocation-pa.googleapis.com udp
US 1.1.1.1:53 semanticlocation-pa.googleapis.com udp
US 1.1.1.1:53 semanticlocation-pa.googleapis.com udp
US 1.1.1.1:53 semanticlocation-pa.googleapis.com udp
US 1.1.1.1:53 semanticlocation-pa.googleapis.com udp
US 1.1.1.1:53 semanticlocation-pa.googleapis.com udp
US 1.1.1.1:53 semanticlocation-pa.googleapis.com udp
US 1.1.1.1:53 semanticlocation-pa.googleapis.com udp
US 1.1.1.1:53 cmsspain.homes udp
US 1.1.1.1:53 cmsspain.homes udp
GB 142.250.200.46:443 tcp
US 1.1.1.1:53 android.apis.google.com udp
US 1.1.1.1:53 android.apis.google.com udp
US 1.1.1.1:53 semanticlocation-pa.googleapis.com udp
US 1.1.1.1:53 semanticlocation-pa.googleapis.com udp
US 1.1.1.1:53 cmsspain.homes udp
US 1.1.1.1:53 cmsspain.homes udp
US 1.1.1.1:53 4665e98d65bbac5.homes udp
US 1.1.1.1:53 4665e98d65bbac5.net udp
US 1.1.1.1:53 4665e98d65bbac5.homes udp
US 1.1.1.1:53 4665e98d65bbac5.net udp
US 1.1.1.1:53 4665e98d65bbac5.com udp
US 1.1.1.1:53 4665e98d65bbac5.com udp
US 1.1.1.1:53 4665e98d65bbac5.click udp
US 1.1.1.1:53 4665e98d65bbac5.click udp

Files

/data/data/excess.undrilled.improper.crushing/code_cache/decrypted.dex

MD5 dfde1000d6b51cdc38b21ac5fbaa462a
SHA1 8389cd13c15f316d55f7909e6ae71f56dfa8ea1b
SHA256 09e3db729b16cf271d9be99996334422b372bafaae9ba95f65828c5b2bc97d34
SHA512 3f11d6d1c0f4063bb79771834959e8a9d10b7210138fbde88fdf504138ff74c4467b1ca746e341b845ebd10ceb82a122386c1f4f57e2a1ea33f1d51063b08038

/data/data/excess.undrilled.improper.crushing/code_cache/decrypted.dex

MD5 3eb5114b544c4c195d7d55f6c99f7868
SHA1 f6f7cb27e2c3bb3b2ba8334924f0c7bd5ac701c5
SHA256 2d217f39b0abb2c9c16783af3a2327b52d189f3d5ac479efefaaa982998a8c20
SHA512 13f95117cb48e80ac99d10a255112032b563e33854c09944818ed7d733f66788517372f18a9f735feed9520a5682607e280de2b912178426d73973263214237a