Malware Analysis Report

2025-01-19 05:40

Sample ID 241206-1yt8gawmer
Target 31ee863aed7dcda18cf0f88faa562433fd60693507d086f5a87b01b27c883ca0.bin
SHA256 31ee863aed7dcda18cf0f88faa562433fd60693507d086f5a87b01b27c883ca0
Tags
ermac banker collection credential_access discovery evasion impact infostealer persistence stealth trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Mobile Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral3

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

31ee863aed7dcda18cf0f88faa562433fd60693507d086f5a87b01b27c883ca0

Threat Level: Known bad

The file 31ee863aed7dcda18cf0f88faa562433fd60693507d086f5a87b01b27c883ca0.bin was found to be: Known bad.

Malicious Activity Summary

ermac banker collection credential_access discovery evasion impact infostealer persistence stealth trojan

Ermac

Ermac2 payload

Ermac family

Removes its main activity from the application launcher

Makes use of the framework's Accessibility service

Loads dropped Dex/Jar

Queries the phone number (MSISDN for GSM devices)

Queries a list of all the installed applications on the device (Might be used in an attempt to overlay legitimate apps)

Obtains sensitive information copied to the device clipboard

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

Queries the unique device ID (IMEI, MEID, IMSI)

Queries the mobile country code (MCC)

Attempts to obfuscate APK file format

Requests dangerous framework permissions

Performs UI accessibility actions on behalf of the user

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

Uses Crypto APIs (Might try to encrypt user data)

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

2024-12-06 22:03

Signatures

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

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

2024-12-06 22:03

Reported

2024-12-06 22:06

Platform

android-x86-arm-20240624-en

Max time kernel

149s

Max time network

152s

Command Line

com.Owhhejzhsk.apk

Signatures

Ermac

banker trojan infostealer ermac

Ermac family

ermac

Ermac2 payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

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/user/0/com.Owhhejzhsk.apk/app_apkprotector_dex/classes-v1.bin N/A N/A
N/A /data/user/0/com.Owhhejzhsk.apk/app_apkprotector_dex/classes-v1.bin N/A N/A
N/A /data/user/0/com.Owhhejzhsk.apk/app_apkprotector_dex/classes-v1.bin 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
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)

banker discovery

Queries the phone number (MSISDN for GSM devices)

discovery

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

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
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
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
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

Queries the unique device ID (IMEI, MEID, IMSI)

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

Uses Crypto APIs (Might try to encrypt user data)

impact
Description Indicator Process Target
Framework API call javax.crypto.Cipher.doFinal 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

com.Owhhejzhsk.apk

/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/user/0/com.Owhhejzhsk.apk/app_apkprotector_dex/classes-v1.bin --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.Owhhejzhsk.apk/app_apkprotector_dex/oat/x86/classes-v1.odex --compiler-filter=quicken --class-loader-context=&

Network

Country Destination Domain Proto
N/A 224.0.0.251:5353 udp
GB 216.58.204.74:443 tcp
US 1.1.1.1:53 semanticlocation-pa.googleapis.com udp
TM 91.202.233.10:3434 91.202.233.10 tcp
GB 142.250.187.206:443 tcp
US 1.1.1.1:53 android.apis.google.com udp
GB 142.250.180.14:443 android.apis.google.com tcp

Files

/data/data/com.Owhhejzhsk.apk/app_apkprotector_dex/classes-v1.bin

MD5 b1e00b79a8eef2bad76ce8c92f5d0bfd
SHA1 52ade098b14886f9c7b94b08f8c9b1d43a3e46a3
SHA256 1649075d485d1b46259dce1640d31a7e5a50f0c06ba3e3765cfe265a01249d01
SHA512 812112bf15222190a46e9a6807a91e19b8168c5b447607a9e9a5627db7ceb656f20e009616526f4326f36b83a247f4f1a998bd2fbd670c76b67df1bac47385c1

/data/user/0/com.Owhhejzhsk.apk/app_apkprotector_dex/classes-v1.bin

MD5 481c6e57e6223fba004dfbeae7f470f0
SHA1 0326d3e689cbb0099a78213babfc0b9d9eb40781
SHA256 e71f3c8bfe30cbf34135202521be851b3824eedf34fbace6d67ec08444c8d6e0
SHA512 b748f609937cd3eac171a29d66ba16dad209cf08125c26923e210a62ee3042e9a5f2aa09881cdcb0c9b892e056369b878c6d9539126aaef5d907b6623c7215bc

Analysis: behavioral2

Detonation Overview

Submitted

2024-12-06 22:03

Reported

2024-12-06 22:06

Platform

android-x64-20240624-en

Max time kernel

21s

Max time network

151s

Command Line

com.Owhhejzhsk.apk

Signatures

Ermac

banker trojan infostealer ermac

Ermac family

ermac

Ermac2 payload

Description Indicator Process Target
N/A N/A N/A N/A

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/user/0/com.Owhhejzhsk.apk/app_apkprotector_dex/classes-v1.bin N/A N/A
N/A /data/user/0/com.Owhhejzhsk.apk/app_apkprotector_dex/classes-v1.bin 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
Framework service call android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText 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

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

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

Queries the unique device ID (IMEI, MEID, IMSI)

discovery

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

Uses Crypto APIs (Might try to encrypt user data)

impact
Description Indicator Process Target
Framework API call javax.crypto.Cipher.doFinal 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

com.Owhhejzhsk.apk

Network

Country Destination Domain Proto
N/A 224.0.0.251:5353 udp
GB 216.58.201.100:443 tcp
GB 172.217.16.238:443 tcp
GB 216.58.212.234:443 tcp
US 1.1.1.1:53 www.google.com udp
GB 172.217.169.4:443 www.google.com tcp
US 1.1.1.1:53 accounts.google.com udp
US 1.1.1.1:53 accounts.google.com udp
GB 64.233.167.84:443 accounts.google.com tcp
TM 91.202.233.10:3434 91.202.233.10 tcp
US 1.1.1.1:53 ssl.google-analytics.com udp
US 1.1.1.1:53 android.apis.google.com udp
GB 142.250.180.8:443 ssl.google-analytics.com tcp
GB 142.250.200.46:443 android.apis.google.com tcp
US 1.1.1.1:53 www.google.com udp
GB 142.250.187.196:443 www.google.com tcp
GB 142.250.187.206:443 tcp
GB 216.58.201.98:443 tcp
BE 142.251.168.188:5228 tcp
US 1.1.1.1:53 g.tenor.com udp
GB 172.217.169.10:443 g.tenor.com tcp
TM 91.202.233.10:3434 91.202.233.10 tcp
TM 91.202.233.10:3434 91.202.233.10 tcp
US 1.1.1.1:53 android.apis.google.com udp
GB 216.58.204.78:443 android.apis.google.com tcp
US 1.1.1.1:53 semanticlocation-pa.googleapis.com udp
GB 216.58.204.78:443 android.apis.google.com tcp
US 1.1.1.1:53 www.youtube.com udp
GB 216.58.201.110:443 www.youtube.com udp
GB 216.58.201.110:443 www.youtube.com tcp
US 1.1.1.1:53 www.google.com udp
GB 142.250.187.196:443 www.google.com udp
GB 142.250.187.196:443 www.google.com tcp
GB 142.250.187.196:443 www.google.com tcp
US 1.1.1.1:53 mdh-pa.googleapis.com udp
US 1.1.1.1:53 accounts.google.com udp
US 1.1.1.1:53 accounts.google.com udp
BE 64.233.184.84:443 accounts.google.com tcp

Files

/data/data/com.Owhhejzhsk.apk/app_apkprotector_dex/classes-v1.bin

MD5 b1e00b79a8eef2bad76ce8c92f5d0bfd
SHA1 52ade098b14886f9c7b94b08f8c9b1d43a3e46a3
SHA256 1649075d485d1b46259dce1640d31a7e5a50f0c06ba3e3765cfe265a01249d01
SHA512 812112bf15222190a46e9a6807a91e19b8168c5b447607a9e9a5627db7ceb656f20e009616526f4326f36b83a247f4f1a998bd2fbd670c76b67df1bac47385c1

Analysis: behavioral3

Detonation Overview

Submitted

2024-12-06 22:03

Reported

2024-12-06 22:06

Platform

android-x64-arm64-20240624-en

Max time kernel

146s

Max time network

152s

Command Line

com.Owhhejzhsk.apk

Signatures

Ermac

banker trojan infostealer ermac

Ermac family

ermac

Ermac2 payload

Description Indicator Process Target
N/A N/A N/A N/A

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/user/0/com.Owhhejzhsk.apk/app_apkprotector_dex/classes-v1.bin N/A N/A
N/A /data/user/0/com.Owhhejzhsk.apk/app_apkprotector_dex/classes-v1.bin 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
Framework service call android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText 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 a list of all the installed applications on the device (Might be used in an attempt to overlay legitimate apps)

banker discovery

Queries the phone number (MSISDN for GSM devices)

discovery

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

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
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
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

Queries the unique device ID (IMEI, MEID, IMSI)

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

Uses Crypto APIs (Might try to encrypt user data)

impact
Description Indicator Process Target
Framework API call javax.crypto.Cipher.doFinal 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

com.Owhhejzhsk.apk

Network

Country Destination Domain Proto
GB 142.250.187.238:443 tcp
GB 142.250.187.238:443 tcp
GB 142.250.187.238:443 tcp
N/A 224.0.0.251:5353 udp
US 1.1.1.1:53 android.apis.google.com udp
GB 142.250.178.14:443 android.apis.google.com tcp
TM 91.202.233.10:3434 91.202.233.10 tcp
US 1.1.1.1:53 ssl.google-analytics.com udp
GB 216.58.201.104:443 ssl.google-analytics.com tcp
GB 142.250.200.36:443 tcp
GB 142.250.200.36:443 tcp

Files

/data/data/com.Owhhejzhsk.apk/app_apkprotector_dex/classes-v1.bin

MD5 b1e00b79a8eef2bad76ce8c92f5d0bfd
SHA1 52ade098b14886f9c7b94b08f8c9b1d43a3e46a3
SHA256 1649075d485d1b46259dce1640d31a7e5a50f0c06ba3e3765cfe265a01249d01
SHA512 812112bf15222190a46e9a6807a91e19b8168c5b447607a9e9a5627db7ceb656f20e009616526f4326f36b83a247f4f1a998bd2fbd670c76b67df1bac47385c1