Malware Analysis Report

2024-09-09 14:00

Sample ID 240502-clxk3agc79
Target d2b5dd74b5950953028cabf5d62c40366b14a2e803fb091500c6b6826f03f95e.zip
SHA256 d2b5dd74b5950953028cabf5d62c40366b14a2e803fb091500c6b6826f03f95e
Tags
collection credential_access discovery evasion impact persistence stealth trojan ermac
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

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

d2b5dd74b5950953028cabf5d62c40366b14a2e803fb091500c6b6826f03f95e

Threat Level: Known bad

The file d2b5dd74b5950953028cabf5d62c40366b14a2e803fb091500c6b6826f03f95e.zip was found to be: Known bad.

Malicious Activity Summary

collection credential_access discovery evasion impact persistence stealth trojan ermac

Ermac family

Ermac2 payload

Makes use of the framework's Accessibility service

Removes its main activity from the application launcher

Queries information about the current Wi-Fi connection

Makes use of the framework's foreground persistence service

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

Queries the mobile country code (MCC)

Requests enabling of the accessibility settings.

Loads dropped Dex/Jar

Requests dangerous framework permissions

Acquires the wake lock

Declares broadcast receivers with permission to handle system events

Declares services with permission to bind to the system

Uses Crypto APIs (Might try to encrypt user data)

MITRE ATT&CK Matrix

N/A

Analysis: static1

Detonation Overview

Reported

2024-05-02 02:10

Signatures

Ermac family

ermac

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 notification listener services to bind with the system. Allows apps to listen to and interact with notifications on the device. android.permission.BIND_NOTIFICATION_LISTENER_SERVICE N/A N/A
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 access the camera device. android.permission.CAMERA 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 read from external storage. android.permission.READ_EXTERNAL_STORAGE 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 receive SMS messages. android.permission.RECEIVE_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 read access to the device's phone number(s). android.permission.READ_PHONE_NUMBERS N/A N/A
Allows an application to read the user's call log. android.permission.READ_CALL_LOG 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 app to access approximate location. android.permission.ACCESS_COARSE_LOCATION N/A N/A
Allows an application to read the user's contacts data. android.permission.READ_CONTACTS N/A N/A
Allows an application to write the user's contacts data. android.permission.WRITE_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 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

2024-05-02 02:10

Reported

2024-05-02 02:13

Platform

android-x86-arm-20240221-en

Max time kernel

78s

Max time network

131s

Command Line

com.zejapizehiyuki.yijoro

Signatures

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.findAccessibilityNodeInfosByText 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

Queries information about the current Wi-Fi connection

discovery
Description Indicator Process Target
Framework service call android.net.wifi.IWifiManager.getConnectionInfo 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

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

Requests enabling of the accessibility settings.

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

Acquires the wake lock

Description Indicator Process Target
Framework service call android.os.IPowerManager.acquireWakeLock 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

Processes

com.zejapizehiyuki.yijoro

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 142.250.180.10:443 semanticlocation-pa.googleapis.com tcp
US 1.1.1.1:53 null udp
GB 216.58.201.110:443 tcp
US 1.1.1.1:53 android.apis.google.com udp
GB 216.58.213.14:443 android.apis.google.com tcp

Files

/data/data/com.zejapizehiyuki.yijoro/no_backup/androidx.work.workdb-journal

MD5 36b372e6b449197e71c5e28aa0c8b136
SHA1 5ada648fbf4011ed742addd6ed3736c6cf1fd513
SHA256 4e9bc4990a590b26496961bdf2bc079d8d19490b91ee2e3c9076bbd4eb54f10f
SHA512 9ffb6b0b09648202a98fd09bb2965305b35dfe227bb4b0d2ff385c1177842fceed8e51102f05d08f603871b0b762e5b7ae53879c9977ef0c85659f805a2236db

/data/data/com.zejapizehiyuki.yijoro/no_backup/androidx.work.workdb

MD5 f2b4b0190b9f384ca885f0c8c9b14700
SHA1 934ff2646757b5b6e7f20f6a0aa76c7f995d9361
SHA256 0a8ffb6b327963558716e87db8946016d143e39f895fa1b43e95ba7032ce2514
SHA512 ec12685fc0d60526eed4d38820aad95611f3e93ae372be5a57142d8e8a1ba17e6e5dfe381a4e1365dddc0b363c9c40daaffdc1245bd515fddac69bf1abacd7f1

/data/data/com.zejapizehiyuki.yijoro/no_backup/androidx.work.workdb-shm

MD5 bb7df04e1b0a2570657527a7e108ae23
SHA1 5188431849b4613152fd7bdba6a3ff0a4fd6424b
SHA256 c35020473aed1b4642cd726cad727b63fff2824ad68cedd7ffb73c7cbd890479
SHA512 768007e06b0cd9e62d50f458b9435c6dda0a6d272f0b15550f97c478394b743331c3a9c9236e09ab5b9cb3b423b2320a5d66eb3c7068db9ea37891ca40e47012

/data/data/com.zejapizehiyuki.yijoro/no_backup/androidx.work.workdb-wal

MD5 35e4e343baaaab679aa0e51b6f72c076
SHA1 a77b0404fbace1453ba97973c702c338fa477d63
SHA256 f15971967e400fa32f6a9ad6c19b3bdf139bf284a96fcb4e9b61c76c3961c8b0
SHA512 38b1dcc13aca9d014b8de30a0b8b90c34a8a141ca575accd3a7c23ced1bc1e438fdaedcd09e349ac6b6c3d98e5d99993e27c1108cac7a20a51abe99a03919801

/data/data/com.zejapizehiyuki.yijoro/no_backup/androidx.work.workdb-wal

MD5 727e1d59d6c2d983f13e8e3993231fd2
SHA1 4937701117f273de5e4d46f5a1b299f489a2751d
SHA256 0924b93a4cea0257fa796b67614d9458574f664dab7108885ea994cc3ebcf643
SHA512 9e9607842cca8ad5de6c9807a2650567eb625b65b6dbd5862f4b1cf996037e71dc8c06e668457e6412e4bba7a2759a0f73c50532676e203ef440f10047be6b56

/data/data/com.zejapizehiyuki.yijoro/no_backup/androidx.work.workdb-wal

MD5 4c3f2b4f7ff2be6774588a138b80cc99
SHA1 d292f6ed2c51a237a66e1c90058c5350c63d4cff
SHA256 51d6d72eb84c2f187f410d994d2b62921a1abc5bd031ea29017034b4b7d41010
SHA512 b7f327f30ad4541bedbb92f876e9bebbe1549b989454d5dc4a5bd1d76dd9e090855d86baa15f19264cafd4e9c8ee5d5978352c6920c25b094d4dd078d48df056

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-02 02:10

Reported

2024-05-02 02:13

Platform

android-x64-20240221-en

Max time kernel

3s

Max time network

131s

Command Line

com.zejapizehiyuki.yijoro

Signatures

Removes its main activity from the application launcher

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

Processes

com.zejapizehiyuki.yijoro

Network

Country Destination Domain Proto
N/A 224.0.0.251:5353 udp
US 1.1.1.1:53 ssl.google-analytics.com udp
GB 142.250.180.8:443 ssl.google-analytics.com tcp
GB 142.250.178.14:443 tcp
US 1.1.1.1:53 android.apis.google.com udp
GB 142.250.187.206:443 android.apis.google.com tcp
GB 216.58.212.228:443 tcp
GB 216.58.212.228:443 tcp

Files

/data/data/com.zejapizehiyuki.yijoro/no_backup/androidx.work.workdb-journal

MD5 4507dfabdff9286482a0f52918f5e018
SHA1 1a22dab0d608c2f2552c0e37f603e471bb0fe3d6
SHA256 d25b76c72558663bbc9a8a80fe86c8847ed1762b64ce81bd423595d306a30a09
SHA512 a897350efb9259d8b9743032ab1d30fb8fceb599aa511bb6fb28b27251637fc0a5f1237275547d79fd045367610a8276c4076d6681107fcf53175fa5c4d0820c

/data/data/com.zejapizehiyuki.yijoro/no_backup/androidx.work.workdb

MD5 f2b4b0190b9f384ca885f0c8c9b14700
SHA1 934ff2646757b5b6e7f20f6a0aa76c7f995d9361
SHA256 0a8ffb6b327963558716e87db8946016d143e39f895fa1b43e95ba7032ce2514
SHA512 ec12685fc0d60526eed4d38820aad95611f3e93ae372be5a57142d8e8a1ba17e6e5dfe381a4e1365dddc0b363c9c40daaffdc1245bd515fddac69bf1abacd7f1

/data/data/com.zejapizehiyuki.yijoro/no_backup/androidx.work.workdb-shm

MD5 bb7df04e1b0a2570657527a7e108ae23
SHA1 5188431849b4613152fd7bdba6a3ff0a4fd6424b
SHA256 c35020473aed1b4642cd726cad727b63fff2824ad68cedd7ffb73c7cbd890479
SHA512 768007e06b0cd9e62d50f458b9435c6dda0a6d272f0b15550f97c478394b743331c3a9c9236e09ab5b9cb3b423b2320a5d66eb3c7068db9ea37891ca40e47012

/data/data/com.zejapizehiyuki.yijoro/no_backup/androidx.work.workdb-wal

MD5 ea9776b3f20acbace3ba45817f9a889c
SHA1 87f153e0e3bf5d7cc10fa1007d53484b93279bd4
SHA256 a0d67c774cce661442711c251258682a3e7ff3bae0d0fb03a4c105aad4c03ef4
SHA512 e55d5269248788087a1f57b0b9b7bb5c82392f755eae1f603f080ff6ebad0957559b7137c3622a4db1b6cb8e0bd8c832850158eefaf9f9898a2f1690b1ed6f25

Analysis: behavioral3

Detonation Overview

Submitted

2024-05-02 02:10

Reported

2024-05-02 02:13

Platform

android-x64-arm64-20240221-en

Max time kernel

6s

Max time network

145s

Command Line

com.zejapizehiyuki.yijoro

Signatures

Loads dropped Dex/Jar

evasion
Description Indicator Process Target
N/A /system_ext/framework/androidx.window.sidecar.jar N/A N/A
N/A /system_ext/framework/androidx.window.sidecar.jar 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

Queries the mobile country code (MCC)

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

Acquires the wake lock

Description Indicator Process Target
Framework service call android.os.IPowerManager.acquireWakeLock N/A N/A

Processes

com.zejapizehiyuki.yijoro

Network

Country Destination Domain Proto
N/A 224.0.0.251:5353 udp
GB 216.58.212.238:443 udp
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
US 1.1.1.1:53 ssl.google-analytics.com udp
GB 216.58.212.200:443 ssl.google-analytics.com tcp
US 1.1.1.1:53 null udp
GB 172.217.169.4:443 tcp
GB 172.217.169.4:443 tcp

Files

/system_ext/framework/androidx.window.sidecar.jar

MD5 bdf3529e80318eb14e53a5bf3720c10d
SHA1 25c9ace4b1af6e80ebb2572345972c56505969ba
SHA256 bbc8300dd1e9cd08de8f66560c1ac2c928615b72b51cef9649f88974f586d64b
SHA512 48b9c2d01171bb651b9b54826baa51f4add48431a3efd8ceb5f7cc3bcd6f8f37edf47fabb24349dd15b3a02329cd450f90a8d164bf4f8dfae554bf3b35a8a55b

/data/user/0/com.zejapizehiyuki.yijoro/no_backup/androidx.work.workdb-journal

MD5 bfd4a9ecc1bcfc4a5034c2ca4f38a160
SHA1 06351fab8951257d630ebae2e6ae1f1135524079
SHA256 2cb1cd59ebf184dfbbbbea66dab8087f7dc823cb52f2c70d0278a957ab578986
SHA512 2fb4b2a093db469924914e5b78bf8dff017fd2875169912e2ad95e5250501273f00e2fa919f790c25032355f79b4663211e56c198ed6fb92138f919898f8c4a8

/data/user/0/com.zejapizehiyuki.yijoro/no_backup/androidx.work.workdb

MD5 7e858c4054eb00fcddc653a04e5cd1c6
SHA1 2e056bf31a8d78df136f02a62afeeca77f4faccf
SHA256 9010186c5c083155a45673017d1e31c2a178e63cc15a57bbffde4d1956a23dad
SHA512 d0c7a120940c8e637d5566ef179d01eff88a2c2650afda69ad2a46aad76533eaace192028bba3d60407b4e34a950e7560f95d9f9b8eebe361ef62897d88b30cb

/data/user/0/com.zejapizehiyuki.yijoro/no_backup/androidx.work.workdb-shm

MD5 bb7df04e1b0a2570657527a7e108ae23
SHA1 5188431849b4613152fd7bdba6a3ff0a4fd6424b
SHA256 c35020473aed1b4642cd726cad727b63fff2824ad68cedd7ffb73c7cbd890479
SHA512 768007e06b0cd9e62d50f458b9435c6dda0a6d272f0b15550f97c478394b743331c3a9c9236e09ab5b9cb3b423b2320a5d66eb3c7068db9ea37891ca40e47012

/data/user/0/com.zejapizehiyuki.yijoro/no_backup/androidx.work.workdb-wal

MD5 01e198eb03a3fa0cc79ce5fc8b7e752c
SHA1 7ac59f4cdc22afeb8ad7f0a94b7d19b0bbdae281
SHA256 7f02d62515309fd2a5421767fcc2370ea6fe04d6015414b7e0f6ee1e2c52940b
SHA512 c0d86420d8ab0e98eb02f36944eb5d94a14abdc4b57092cd262d1b6e7741d749fba423596ddfabdabb4a1e6c8a3b677b4de8f0ac286df9e50bf333489616be84

/data/user/0/com.zejapizehiyuki.yijoro/no_backup/androidx.work.workdb-wal

MD5 4e61b2d44075d0aee232efc97bf0c1be
SHA1 292c4f41505d5da132a10ccf90e4b78fdca1a3ad
SHA256 9fede1d68edfda270b8bbbfc19a74d00f5459b0d184e728643ea0fd5702564b9
SHA512 7434bf80b7f2d33ebf20589ba7e9994fab8183f26ac7451c84865f5a89c361140f0e77ca434f73935b91444641383739156d0777c05df4604971b0a1d37638bc

/data/user/0/com.zejapizehiyuki.yijoro/no_backup/androidx.work.workdb-wal

MD5 a93e7a4abee557e36d0707249a7cb5f5
SHA1 b52f5ea92e1ee5ce04e5053d6bd050b367fe659c
SHA256 2810f9af11cf0695a074091f161c064dbc720fa24c6351777f8b420be230b039
SHA512 e27693f2d413e575765151b8d653af5bd1253f8b9e201c2a4e6fbe5ebe72aaaab1b51054303fc7a3e38e8bb6a2a1d8eaf3ae48f68d80091a55ca66374b9230a8