ermac | b39066b6ef956b773733e3441485e2e3a6b412251a33113bf7f29de7f010d3c9

Analysis

max time kernel
9s
max time network
155s
platform
android_x64
resource
android-x64-20240624-en
resource tags

androidarch:x64arch:x86image:android-x64-20240624-enlocale:en-usos:android-10-x64system
submitted
16-01-2025 06:18

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General

Target

b39066b6ef956b773733e3441485e2e3a6b412251a33113bf7f29de7f010d3c9.apk
Size

3.9MB
MD5

bd281af4799e607361972e7db41aeb84
SHA1

0fbfd66b84bef8c44f8cc1eb222ce39b40f5e9aa
SHA256

b39066b6ef956b773733e3441485e2e3a6b412251a33113bf7f29de7f010d3c9
SHA512

86f1fe505b00fdb2c8a14addbb98159eb5c980d7a81036c7d017573465eab5a425da25718d4403d0118ad726640021e947044eb5f99155a0b1dad1b3a95da887
SSDEEP

98304:9L2WOfKPr7DNEj05LKba0ySreQY6V4FlX8ExdXRElQaqv:oWOoDNEjoLgCQb4oExlREcv

Score

10^/10

ermac hook banker collection credential_access discovery evasion execution impact infostealer persistence rat trojan

Malware Config

Extracted

Family

ermac

http://154.216.18.137

AES_key

Extracted

Family

hook

http://154.216.18.137

AES_key

Signatures

Ermac
An Android banking trojan first seen in July 2021.
banker trojan infostealer ermac
Ermac family
ermac

Ermac2 payload 1 IoCs

resource	yara_rule
behavioral2/memory/4962-0.dex	family_ermac2

Hook
Hook is an Android malware that is based on Ermac with RAT capabilities.
rat trojan infostealer hook
Hook family
hook

Loads dropped Dex/Jar 1 TTPs 1 IoCs

Runs executable file dropped to the device during analysis.

evasion

Download New Code at Runtime

T1407

ioc	pid	Process
/data/user/0/com.zkasaslkasata.kuri/app_exercise/UNq.json	4962	com.zkasaslkasata.kuri

Obtains sensitive information copied to the device clipboard 2 TTPs 1 IoCs

Application may abuse the framework's APIs to obtain sensitive information copied to the device clipboard.

collection credential_access impact

Clipboard Data

T1414

Transmitted Data Manipulation

T1641.001

description	ioc	Process
Framework service call	android.content.IClipboard.addPrimaryClipChangedListener	com.zkasaslkasata.kuri

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

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

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

discovery

Process Discovery

T1424

description	ioc	Process
Framework service call	android.app.IActivityManager.getRunningAppProcesses	com.zkasaslkasata.kuri

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

System Network Configuration Discovery
T1422

Acquires the wake lock 1 IoCs

description	ioc	Process
Framework service call	android.os.IPowerManager.acquireWakeLock	com.zkasaslkasata.kuri

Makes use of the framework's foreground persistence service 1 TTPs 1 IoCs

Application may abuse the framework's foreground service to continue running in the foreground.

evasion persistence

Foreground Persistence

T1541

description	ioc	Process
Framework service call	android.app.IActivityManager.setServiceForeground	com.zkasaslkasata.kuri

Queries the mobile country code (MCC) 1 TTPs 1 IoCs

discovery

System Network Configuration Discovery

T1422

description	ioc	Process
Framework service call	com.android.internal.telephony.ITelephony.getNetworkCountryIsoForPhone	com.zkasaslkasata.kuri

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

persistence

Broadcast Receivers

T1624.001

description	ioc	Process
Framework service call	android.app.IActivityManager.registerReceiver	com.zkasaslkasata.kuri

Schedules tasks to execute at a specified time 1 TTPs 1 IoCs

Application may abuse the framework's APIs to perform task scheduling for initial or recurring execution of malicious code.

execution persistence

Scheduled Task/Job

T1603

description	ioc	Process
Framework service call	android.app.job.IJobScheduler.schedule	com.zkasaslkasata.kuri

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.zkasaslkasata.kuri

Checks CPU information 2 TTPs 1 IoCs

System Checks

T1633.001

System Information Discovery

T1426

description	ioc	Process
File opened for read	/proc/cpuinfo	com.zkasaslkasata.kuri

Checks memory information 2 TTPs 1 IoCs

System Checks

T1633.001

System Information Discovery

T1426

description	ioc	Process
File opened for read	/proc/meminfo	com.zkasaslkasata.kuri

com.zkasaslkasata.kuri
1⤵
- Loads dropped Dex/Jar
- Obtains sensitive information copied to the device clipboard
- Queries information about running processes on the device
- Acquires the wake lock
- Makes use of the framework's foreground persistence service
- Queries the mobile country code (MCC)
- Registers a broadcast receiver at runtime (usually for listening for system events)
- Schedules tasks to execute at a specified time
- Uses Crypto APIs (Might try to encrypt user data)
- Checks CPU information
- Checks memory information
PID:4962

Network

MITRE ATT&CK Mobile v15

Initial Access

Execution

Scheduled Task/Job

T1603

Persistence

Event Triggered Execution

T1624

Broadcast Receivers

T1624.001

Foreground Persistence

T1541

Scheduled Task/Job

T1603

Privilege Escalation

Defense Evasion

Download New Code at Runtime

T1407

Foreground Persistence

T1541

Virtualization/Sandbox Evasion

T1633

System Checks

T1633.001

Credential Access

Clipboard Data

T1414

Discovery

Process Discovery

T1424

Software Discovery

T1418

Security Software Discovery

T1418.001

System Information Discovery

T1426

System Network Configuration Discovery

T1422

Lateral Movement

Collection

Clipboard Data

T1414

Command and Control

Exfiltration

Impact

Data Encrypted for Impact

T1471

Data Manipulation

T1641

Transmitted Data Manipulation

T1641.001

Replay Monitor

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Downloads

/data/data/com.zkasaslkasata.kuri/app_exercise/UNq.json

Filesize
736KB

MD5
5d672c08aad79b225d9e420bf4089408

SHA1
8c9d7e9e94c8866dd2df48123ed223c59f615188

SHA256
af8d3366a547d8fdabd01b98da0c947b8477aa81f85e3c1672303a3f5064b29e

SHA512
c31d09e892ae0a1bf3d1bd903648f773607fe163b8ee386c11e4b5516c68db747f4d7ad91bba17443b446589c4b70db62e1079afca5badbc3f63968dcd8d6c4b

Download Submit
/data/data/com.zkasaslkasata.kuri/app_exercise/UNq.json

Filesize
736KB

MD5
9aa5cea33b9868b1a19149a4f89be59d

SHA1
32b040b6f045c127da1ae04dc33737914cb6e01f

SHA256
e1df0b98068001a3532efca304f30e272c9f4661bc62e5ec952b1399ddbd639b

SHA512
d81e4943c13ff2bb484b297ac35e2fd20b6fbfd8d49c649c6ffea8574316abf626316a18793e196f2c785bbdd4fd01f11fab828caeae0611247bcbb39d75dc96

Download Submit
/data/data/com.zkasaslkasata.kuri/no_backup/androidx.work.workdb

Filesize
4KB

MD5
f2b4b0190b9f384ca885f0c8c9b14700

SHA1
934ff2646757b5b6e7f20f6a0aa76c7f995d9361

SHA256
0a8ffb6b327963558716e87db8946016d143e39f895fa1b43e95ba7032ce2514

SHA512
ec12685fc0d60526eed4d38820aad95611f3e93ae372be5a57142d8e8a1ba17e6e5dfe381a4e1365dddc0b363c9c40daaffdc1245bd515fddac69bf1abacd7f1

Download Submit
/data/data/com.zkasaslkasata.kuri/no_backup/androidx.work.workdb-journal

Filesize
512B

MD5
dd517c7ac66bcfdbd059cdb40b938318

SHA1
e5fe93964f10c50845a077d9759bc96d8b41b594

SHA256
32b1f6ce0d9413d53974ef32787e3f5d0a0bd4ff24cdd4ed0c0c24035544ffd0

SHA512
911491fc7fb1eed88b944ee145db9f49a610871c4c2d59a4f26afceeb33e1a16d41248bb96c66624bea866fd74b17392c5f80451d0b871dd475184bbc642235f

Download Submit
/data/data/com.zkasaslkasata.kuri/no_backup/androidx.work.workdb-shm

Filesize
32KB

MD5
bb7df04e1b0a2570657527a7e108ae23

SHA1
5188431849b4613152fd7bdba6a3ff0a4fd6424b

SHA256
c35020473aed1b4642cd726cad727b63fff2824ad68cedd7ffb73c7cbd890479

SHA512
768007e06b0cd9e62d50f458b9435c6dda0a6d272f0b15550f97c478394b743331c3a9c9236e09ab5b9cb3b423b2320a5d66eb3c7068db9ea37891ca40e47012

Download Submit
/data/data/com.zkasaslkasata.kuri/no_backup/androidx.work.workdb-wal

Filesize
16KB

MD5
749681f6f278855fba655b144bca95d3

SHA1
b3f3758895d56532c5bb60615782b3dff7ab0922

SHA256
b81b52a6a6b0fcd7504b64074f522268a359913a3a4787a14a096b1f30f84360

SHA512
eaaae6849ff3eac8e698bfa5251d370aba2348c568a0afd1fc9f280ba6dac4a50c66dfadf74d6ddab7be03a86e08067e0f3f807e489b10d83c537c2a6bb79ad3

Download Submit
/data/data/com.zkasaslkasata.kuri/no_backup/androidx.work.workdb-wal

Filesize
108KB

MD5
23f97b551d3f7aa3a81d55b3ab84e9cd

SHA1
232d41249773f392a9bc64b54a2a10a46a3571d8

SHA256
eecb479a593141cc595db97320999a4d11c3dc04de16738598feb7122fda1dc3

SHA512
a961bd46149d64c34073ce683fd90d0ce267b1119934400bf7404e1d2c29e8cb8ba935314bdd67631556ef8e00ef7a2906f46df28eb6ae5348c71066ad847786

Download Submit
/data/data/com.zkasaslkasata.kuri/no_backup/androidx.work.workdb-wal

Filesize
173KB

MD5
e6b2fc2ec32818f872b086bfb894a93f

SHA1
9015b824c6960fb6a446f5e03d05cb70e3a768f6

SHA256
70f6cde73bbc680869276c0091d2e6bd946d9f3d2c5f53b5d79b6e5afb8f8d51

SHA512
983e309d3a34b74269d04ebade9d2fdc6ccb3859a1b1a7ddea0a74ebf21abb27a6d1b6b9b90a0f0bab147cbfacad663456f546459899fa2fc52f76832a31a5a5

Download Submit
/data/user/0/com.zkasaslkasata.kuri/app_exercise/UNq.json

Filesize
1.7MB

MD5
40a20d8c23e21773552ed5f59ecb321f

SHA1
4823c1f50540d987bd530b729f908fbefce04def

SHA256
b5c5ef231d9a03d37e7c9b99e2796734f072cc085b117f4e424c9583db02dc01

SHA512
5e4634b040c5989763fce4f9e8776d19687f0dd2a169cbbc13ef4ae4563aba1a1fcb19b22486814bf3d220eb87db7c5437433a2fd3310b5378d804b4fe5f3570

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Mobile v15

Replay Monitor

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Downloads