ermac | ef94d055f7d3d318a2d33dcdaa2182fdd7a30c0ca0f9235e20dc6b8211aed14e

Analysis

max time kernel
143s
max time network
150s
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
13-11-2024 22:03

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General

Target

ef94d055f7d3d318a2d33dcdaa2182fdd7a30c0ca0f9235e20dc6b8211aed14e.apk
Size

4.7MB
MD5

00128fa75ad5dd22f77b0512d3587601
SHA1

8693752601503b77a56d0520569ded251b7348c2
SHA256

ef94d055f7d3d318a2d33dcdaa2182fdd7a30c0ca0f9235e20dc6b8211aed14e
SHA512

92af7968be606a7749b069ee5b9d023569ae82e9af5de58ff08fa0b2681ef445575405f05d46d62ae77ab10751701d791de764dd6f6738e29f1b41064473fa76
SSDEEP

98304:49E62rVCnNf4UlNQ4g/Ho4BAqh3sRHF/T30uqTddAVQrTkJDuJI6lzed+hQrEsCl:KU4g/IJdJim6ls+hQ4zf

Score

10^/10

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

Malware Config

Extracted

Family

ermac

http://ytgrfesrjhgf.pro; http://ytgrfesrjhgftf.pro; http://ytgrfesrjhgftfuyfq.pro; http://ytgrfesrjhgftfuyfqsre.pro; http://ytgrfesrjhgftfuyfqsrey.pro

http://ytgrfesrjhgf.pro

AES_key

Extracted

Family

hook

http://ytgrfesrjhgf.pro; http://ytgrfesrjhgftf.pro; http://ytgrfesrjhgftfuyfq.pro; http://ytgrfesrjhgftfuyfqsre.pro; http://ytgrfesrjhgftfuyfqsrey.pro

http://ytgrfesrjhgf.pro

AES_key

Signatures

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

Ermac2 payload 2 IoCs

Processes:

resource	yara_rule
/data/user/0/com.mokusubitivu.zexajo/app_suggest/qOJs.json	family_ermac2
/data/user/0/com.mokusubitivu.zexajo/app_suggest/qOJs.json	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

Processes:

/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.mokusubitivu.zexajo/app_suggest/qOJs.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.mokusubitivu.zexajo/app_suggest/oat/x86/qOJs.odex --compiler-filter=quicken --class-loader-context=&com.mokusubitivu.zexajo

ioc	pid	process
/data/user/0/com.mokusubitivu.zexajo/app_suggest/qOJs.json	4296	/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.mokusubitivu.zexajo/app_suggest/qOJs.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.mokusubitivu.zexajo/app_suggest/oat/x86/qOJs.odex --compiler-filter=quicken --class-loader-context=&
/data/user/0/com.mokusubitivu.zexajo/app_suggest/qOJs.json	4270	com.mokusubitivu.zexajo

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

Processes:

com.mokusubitivu.zexajo

description	ioc	process
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfoByAccessibilityId	com.mokusubitivu.zexajo
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText	com.mokusubitivu.zexajo
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId	com.mokusubitivu.zexajo

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

Processes:

com.mokusubitivu.zexajo

description ioc process

Framework service call android.app.IActivityManager.getRunningAppProcesses com.mokusubitivu.zexajo
Queries the phone number (MSISDN for GSM devices) 1 TTPs
discovery

System Network Configuration Discovery
T1422
Acquires the wake lock 1 IoCs

Processes:

com.mokusubitivu.zexajo

description ioc process

Framework service call android.os.IPowerManager.acquireWakeLock com.mokusubitivu.zexajo
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

Processes:

com.mokusubitivu.zexajo

description ioc process

Framework service call android.app.IActivityManager.setServiceForeground com.mokusubitivu.zexajo

description	ioc	process
Framework service call	android.app.IActivityManager.getRunningAppProcesses	com.mokusubitivu.zexajo

description	ioc	process
Framework service call	android.os.IPowerManager.acquireWakeLock	com.mokusubitivu.zexajo

description	ioc	process
Framework service call	android.app.IActivityManager.setServiceForeground	com.mokusubitivu.zexajo

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

Processes:

com.mokusubitivu.zexajo

ioc	process
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.mokusubitivu.zexajo
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.mokusubitivu.zexajo
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.mokusubitivu.zexajo
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.mokusubitivu.zexajo
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.mokusubitivu.zexajo

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

Processes:

com.mokusubitivu.zexajo

description ioc process

Framework service call android.net.wifi.IWifiManager.getConnectionInfo com.mokusubitivu.zexajo
Queries the mobile country code (MCC) 1 TTPs 1 IoCs
discovery

System Network Configuration Discovery
T1422

Processes:

com.mokusubitivu.zexajo

description ioc process

Framework service call com.android.internal.telephony.ITelephony.getNetworkCountryIsoForPhone com.mokusubitivu.zexajo
Registers a broadcast receiver at runtime (usually for listening for system events) 1 TTPs 1 IoCs
persistence

Broadcast Receivers
T1624.001

Processes:

com.mokusubitivu.zexajo

description ioc process

Framework service call android.app.IActivityManager.registerReceiver com.mokusubitivu.zexajo
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

Processes:

com.mokusubitivu.zexajo

description ioc process

Framework service call android.app.job.IJobScheduler.schedule com.mokusubitivu.zexajo
Uses Crypto APIs (Might try to encrypt user data) 1 TTPs 1 IoCs
impact

Data Encrypted for Impact
T1471

Processes:

com.mokusubitivu.zexajo

description ioc process

Framework API call javax.crypto.Cipher.doFinal com.mokusubitivu.zexajo
Checks CPU information 2 TTPs 1 IoCs

System Checks
T1633.001

System Information Discovery
T1426

Processes:

com.mokusubitivu.zexajo

description ioc process

File opened for read /proc/cpuinfo com.mokusubitivu.zexajo
Checks memory information 2 TTPs 1 IoCs

System Checks
T1633.001

System Information Discovery
T1426

Processes:

com.mokusubitivu.zexajo

description ioc process

File opened for read /proc/meminfo com.mokusubitivu.zexajo

description	ioc	process
Framework service call	android.net.wifi.IWifiManager.getConnectionInfo	com.mokusubitivu.zexajo

description	ioc	process
Framework service call	com.android.internal.telephony.ITelephony.getNetworkCountryIsoForPhone	com.mokusubitivu.zexajo

description	ioc	process
Framework service call	android.app.IActivityManager.registerReceiver	com.mokusubitivu.zexajo

description	ioc	process
Framework service call	android.app.job.IJobScheduler.schedule	com.mokusubitivu.zexajo

description	ioc	process
Framework API call	javax.crypto.Cipher.doFinal	com.mokusubitivu.zexajo

description	ioc	process
File opened for read	/proc/cpuinfo	com.mokusubitivu.zexajo

description	ioc	process
File opened for read	/proc/meminfo	com.mokusubitivu.zexajo

com.mokusubitivu.zexajo
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:4270
- /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.mokusubitivu.zexajo/app_suggest/qOJs.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.mokusubitivu.zexajo/app_suggest/oat/x86/qOJs.odex --compiler-filter=quicken --class-loader-context=&
  2⤵
  - Loads dropped Dex/Jar
  PID:4296

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.mokusubitivu.zexajo/app_suggest/oat/qOJs.json.cur.prof

Filesize
2KB

MD5
9a16e7e98b22cdc3125aa9071a306761

SHA1
a2c6e78326b9fed8e863fe25ea847c4b8b7b1f3e

SHA256
bcb486e5737a4ba2d784d30bc0154e46c78af325b6d03a3b9279d588d6ba0001

SHA512
f731191af4d80d691e5d42bd0be0bba0f24ba460440bf5f7face869db91c074acc323bc2c383232e6b5969ecffc74ac6c327040fe7b4f5ab660f76ae28e550e4

Download Submit
/data/data/com.mokusubitivu.zexajo/app_suggest/qOJs.json

Filesize
691KB

MD5
34eda891de0eddcbd0f2c5cd6b70a436

SHA1
8e2bd325df089df52534e4c75d9aadfe0c5bdca8

SHA256
92e59e4cf96282d1b450d22c84dec9b10a9d8ee803a4a6255dd3dbab6adb2bb8

SHA512
4b26c0ffdb2cd2185db677bb2e8898bf01c372633be44a5f736bbcc171aa1fc4e1ab1dd6c734771df69260ea49cc10813bb801369ae9284d259113da1ac3eacb

Download Submit
/data/data/com.mokusubitivu.zexajo/app_suggest/qOJs.json

Filesize
691KB

MD5
b0cf3eb44021e9ff24a9aff9a6d618e4

SHA1
1e8567b94285305637b424289298e9e8103bb68c

SHA256
1a9be3cbf38b4306df2a808a52ce709be880db6df93e7a58b240be193f60629d

SHA512
f28ed9aa4f8de4221e8bfadfa3a4d09616c00066518d252e70b453f40e1ccbf0a85eb59f09cfa97954725b48182b2cb891f5852aa237d1cfee650c7199cf24c7

Download Submit
/data/data/com.mokusubitivu.zexajo/no_backup/androidx.work.workdb

Filesize
4KB

MD5
f2b4b0190b9f384ca885f0c8c9b14700

SHA1
934ff2646757b5b6e7f20f6a0aa76c7f995d9361

SHA256
0a8ffb6b327963558716e87db8946016d143e39f895fa1b43e95ba7032ce2514

SHA512
ec12685fc0d60526eed4d38820aad95611f3e93ae372be5a57142d8e8a1ba17e6e5dfe381a4e1365dddc0b363c9c40daaffdc1245bd515fddac69bf1abacd7f1

Download Submit
/data/data/com.mokusubitivu.zexajo/no_backup/androidx.work.workdb-journal

Filesize
512B

MD5
339b8f120051c35c1d2c0fd9e21b4898

SHA1
df6bd223b1fe4b79094af1992615c7e7051edceb

SHA256
67dc68bac37f2952e6bb2890d8a9cd4b8b80f42a876847cc33c56c1302f32ae1

SHA512
e84c4bc51c6799bc976bd6a25d8d22c6b8503e41aa41f7489a75eafe1142658a4f20cea358fb9e088555dee7db5f734abdf73142d77e7b0481ff5183970570d8

Download Submit
/data/data/com.mokusubitivu.zexajo/no_backup/androidx.work.workdb-shm

Filesize
32KB

MD5
bb7df04e1b0a2570657527a7e108ae23

SHA1
5188431849b4613152fd7bdba6a3ff0a4fd6424b

SHA256
c35020473aed1b4642cd726cad727b63fff2824ad68cedd7ffb73c7cbd890479

SHA512
768007e06b0cd9e62d50f458b9435c6dda0a6d272f0b15550f97c478394b743331c3a9c9236e09ab5b9cb3b423b2320a5d66eb3c7068db9ea37891ca40e47012

Download Submit
/data/data/com.mokusubitivu.zexajo/no_backup/androidx.work.workdb-wal

Filesize
108KB

MD5
c3fed3a3c49f74cfcbf9864391a84ae8

SHA1
a51acf08986ba782c1d02a077f64cf506d8db7bc

SHA256
257d94c29f14c2abdfec7e1ed991eb763cc5d1f4048544cff093d56c3ff72be3

SHA512
37063df4fa15b41983fac5713cf61342ed12f18dac955f86b421b2a39dafa9d56e6f4868980a939df37c48fc1b6abe70e89c63933c34aa4f87c52df65c8b513c

Download Submit
/data/data/com.mokusubitivu.zexajo/no_backup/androidx.work.workdb-wal

Filesize
173KB

MD5
ed402c8366b7cc4b952a0ddafd6f5d5a

SHA1
3e75b71c5effcc64655801b691b2a973b08b2f13

SHA256
c45a543a4e2f58d97ed73506abf0408fbc8dd3948c6c8ab9b698395e7122c485

SHA512
8c39fa3bfafe208f724854f435499cf425cb3ed2e01654b62d2c56e8e869e46a5791544d5b8381427f5ad6436e58cb477560dc01a85b1c672b428fe09c33d7c3

Download Submit
/data/data/com.mokusubitivu.zexajo/no_backup/androidx.work.workdb-wal

Filesize
16KB

MD5
44432aeb304e4a9bc6fdc4b4efa4a7d5

SHA1
00e5713e734d681de44720e22f7de360c521f52b

SHA256
62337b417ec30021198cca7b28422a5334c66bcb2bafb1eb6d14bbc55715d3d2

SHA512
4d97003196511aa80d8d8eef5c113370e258d469f064126ae05cf215ef0fef5c875f4c03244def1e1f2fb4cf98a101e64cd08555d68cc018d94ec68dac829160

Download Submit
/data/user/0/com.mokusubitivu.zexajo/app_suggest/qOJs.json

Filesize
1.5MB

MD5
9c5b985633a9543471c132bb87aa3441

SHA1
5c74abbaa6c23ddb5f90b509c66edcf13abf00ef

SHA256
c11f17ab87a97bd3fe9277f3e9e84948eb0eadcc83f460168f0dfa2c8adcd315

SHA512
09338fc45fb168d21e1022158c132eefbcf7334545252c1f6cf1bca296ffbf6f32fbdd8251bb20bc779691e75a00fc0e95d83416ae3de38bbec174d303cb6d06

Download Submit
/data/user/0/com.mokusubitivu.zexajo/app_suggest/qOJs.json

Filesize
1.5MB

MD5
56f384576200bda9fe2fcf7a0fe0ff1f

SHA1
343e91224ef03dc6b323ade4dae19b36fe982a82

SHA256
20345681cc4e1b9e271a70f1db9320256e7e905bd60a0bf583f3af0e1adf3456

SHA512
4d023dd3f639dec6a6e8f2d2f4d918b942bcd33aeac2917a7610ed8a416917407e9732407b2e74af9498080695e2dc26ef1604a6688dc4c3ff5ec92b363c854f

Download Submit