ermac | b39066b6ef956b773733e3441485e2e3a6b412251a33113bf7f29de7f010d3c9

Analysis

max time kernel
135s
max time network
156s
platform
android_x86
resource
android-x86-arm-20240624-en
resource tags

androidarch:armarch:x86image:android-x86-arm-20240624-enlocale:en-usos:android-9-x86system
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 2 IoCs

resource	yara_rule
behavioral1/memory/4280-0.dex	family_ermac2
behavioral1/memory/4255-0.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 2 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	4280	/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.zkasaslkasata.kuri/app_exercise/UNq.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.zkasaslkasata.kuri/app_exercise/oat/x86/UNq.odex --compiler-filter=quicken --class-loader-context=&
/data/user/0/com.zkasaslkasata.kuri/app_exercise/UNq.json	4255	com.zkasaslkasata.kuri

Makes use of the framework's Accessibility service 4 TTPs 3 IoCs

Retrieves information displayed on the phone screen using AccessibilityService.

collection evasion credential_access

Input Injection

T1516

Screen Capture

T1513

Keylogging

T1417.001

GUI Input Capture

T1417.002

description	ioc	Process
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfoByAccessibilityId	com.zkasaslkasata.kuri
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText	com.zkasaslkasata.kuri
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId	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

Performs UI accessibility actions on behalf of the user 1 TTPs 5 IoCs

Application may abuse the accessibility service to prevent their removal.

evasion

Prevent Application Removal

T1629.001

ioc	Process
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.zkasaslkasata.kuri
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.zkasaslkasata.kuri
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.zkasaslkasata.kuri
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.zkasaslkasata.kuri
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.zkasaslkasata.kuri

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.

discovery

System Network Connections Discovery

T1421

description	ioc	Process
Framework service call	android.net.wifi.IWifiManager.getConnectionInfo	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
- Makes use of the framework's Accessibility service
- Queries information about running processes on the device
- Acquires the wake lock
- Makes use of the framework's foreground persistence service
- Performs UI accessibility actions on behalf of the user
- Queries information about the current Wi-Fi connection
- 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:4255
- /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.zkasaslkasata.kuri/app_exercise/UNq.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.zkasaslkasata.kuri/app_exercise/oat/x86/UNq.odex --compiler-filter=quicken --class-loader-context=&
  2⤵
  - Loads dropped Dex/Jar
  PID:4280

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

Impair Defenses

T1629

Prevent Application Removal

T1629.001

Input Injection

T1516

Virtualization/Sandbox Evasion

T1633

System Checks

T1633.001

Credential Access

Input Capture

T1417

GUI Input Capture

T1417.002

Keylogging

T1417.001

Discovery

Process Discovery

T1424

Software Discovery

T1418

Security Software Discovery

T1418.001

System Information Discovery

T1426

System Network Configuration Discovery

T1422

System Network Connections Discovery

T1421

Lateral Movement

Collection

Input Capture

T1417

GUI Input Capture

T1417.002

Keylogging

T1417.001

Screen Capture

T1513

Command and Control

Exfiltration

Impact

Data Encrypted for Impact

T1471

Input Injection

T1516

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/app_exercise/oat/UNq.json.cur.prof

Filesize
2KB

MD5
5bc9ab4172ecfcc2d494119333b8ee70

SHA1
bf343c3440d5955d8482cca17a510b8402f4cf2d

SHA256
e330c6cbf17ce9538a3a4f14e0dd5e52093ac392b6afe0f7d2bbd68a3a95d138

SHA512
20979c416fd4f914b3a05f03e8fde6a026ecf01745715dafb14addb976e825f4f2ec3b60ce2d1dbce1e7489905111704967821c59a25128830b4d401be7610ad

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
3bd0134c58984e42caef8538b2343b7f

SHA1
9fb8fdbab325f8d22290d5c49efe360a230a105f

SHA256
6584fec615f2b7f71599cc7d31a9cc3512decf6ba1c3f4d8c878fbd490771684

SHA512
ed2631e805f2a7e1e1d33d9ce2aa5a99abd89f525b6afb462ca7854cf21cc2fcc930aa3f866cd73b3859b427e403d4b6d2aef93d41bb525f2ea880f5ff8f4cf9

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
108KB

MD5
b7fb56d367da6edfe5feb3e4e5000d4f

SHA1
7e8b2908be8c1ce8d144adadbc785bf57a584b00

SHA256
bc295756cf46768e4b5f86a184b2fd3fc99e982372d22f598b0ca5bd3062990b

SHA512
ba7dd5464f5ab806ab2c47fbbcacf6552be233ae8cb89c863f2e10e50e6e9e800d8afca844c76c56fdb29a59048edc91d76b3ead80e36e241eacaf5bd22ad04b

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

Filesize
173KB

MD5
fb34a3c6cb027b42b1e84cb2f6edebe2

SHA1
8c809d2d94016b7669014674b21104d1bd23b669

SHA256
e66574f83e145a5a72cedc87119c78b15f68a94bd5562c71fdc0e4b000bd75f0

SHA512
caf8f51dc844ca4972ede9d80f6e8d5344b56cc20a5247fc722dbb36e15c4ff45813396c7fc72a7ee3aefabe01ee4682b8046644b4f6386649f6d752341de220

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

Filesize
16KB

MD5
cc3cbea5afc5f6725444e2a6b57aa7b0

SHA1
76a6afb28fb5bb1febd8a7a4e38df4993d40d747

SHA256
cc01dc3ab10db78829a72373b8eb412e69af59a5bf1f0f2f87792e746c0b4501

SHA512
32bfc88d41f9f72ebf16e7d3e22f4c9007ce0a725a4bb3e4a7788173e41747378446bc2bb19cb76fd92866b15b12e0a45f5a22c2b3108431e8c85acf48acf7fa

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

Filesize
1.7MB

MD5
f72ba8a0c961759492323994be4cf7c8

SHA1
c38d874f53cf1dfc3e637ea997a40fdd52221470

SHA256
bb94a826fb0a38d73245b7401d2c2dc1845e7366ba7068ac57196b855c505419

SHA512
7a69b621866a1e6820c4394d303570270c4d022d903a629b45e7fd715a9f6649b4c65a7f1c5c94853e4336b804440dd4ff11af95ea6ed3e4e78398b577ddd1bf

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