ermac | 91c8fc62f4643ed7a9418dbf37601143f8da7e84700f5df6d83ea1f585dfbbcc

Analysis

max time kernel
149s
max time network
154s
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
04-01-2025 22:00

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General

Target

91c8fc62f4643ed7a9418dbf37601143f8da7e84700f5df6d83ea1f585dfbbcc.apk
Size

2.6MB
MD5

e027f25cd292bc603a0fc0e15060ac80
SHA1

4c0684041a3ddb128c51d3aca1542bbd30af4ede
SHA256

91c8fc62f4643ed7a9418dbf37601143f8da7e84700f5df6d83ea1f585dfbbcc
SHA512

001b29dc225838d5e2aa245b98b37b20bd98906cc041f9c7b0888d3f014f2c2d08f440f9f010cddf47964afadb9c09e7a13d87f38748dddf2612406a28f545c3
SSDEEP

49152:ug/0eyPmfR9NunmkDI0O+bMGoUdB5NESR5QQXPGRo0m3U5N:dJ9NumkDI0O+wIdB5NE+x0mEH

Score

10^/10

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

Malware Config

Extracted

Family

ermac

http://3.91.190.163:3434

rsa_pubkey

AES_key

Extracted

Family

hook

http://3.91.190.163:3434

rsa_pubkey

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/files/fstream-3.dat	family_ermac2
behavioral1/memory/4250-1.dex	family_ermac2

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

Removes its main activity from the application launcher 1 TTPs 1 IoCs

stealth trojan evasion

Suppress Application Icon

T1628.001

pid	Process
4250	com.gokomozunoxi.duhe

Loads dropped Dex/Jar 1 TTPs 6 IoCs

Runs executable file dropped to the device during analysis.

evasion

Download New Code at Runtime

T1407

ioc	pid	Process
/data/user/0/com.gokomozunoxi.duhe/app_ded/xaTm1S4EJf6nViI3hhQPztQZ9LwxibwZ.dex	4250	com.gokomozunoxi.duhe
/data/user/0/com.gokomozunoxi.duhe/app_ded/xaTm1S4EJf6nViI3hhQPztQZ9LwxibwZ.dex	4277	/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.gokomozunoxi.duhe/app_ded/xaTm1S4EJf6nViI3hhQPztQZ9LwxibwZ.dex --output-vdex-fd=43 --oat-fd=44 --oat-location=/data/user/0/com.gokomozunoxi.duhe/app_ded/oat/x86/xaTm1S4EJf6nViI3hhQPztQZ9LwxibwZ.odex --compiler-filter=quicken --class-loader-context=&
/data/user/0/com.gokomozunoxi.duhe/app_ded/xaTm1S4EJf6nViI3hhQPztQZ9LwxibwZ.dex	4250	com.gokomozunoxi.duhe
/data/user/0/com.gokomozunoxi.duhe/app_ded/8jqXFS16ssyVkyRvRndNy2rEJciVeaH8.dex	4250	com.gokomozunoxi.duhe
/data/user/0/com.gokomozunoxi.duhe/app_ded/8jqXFS16ssyVkyRvRndNy2rEJciVeaH8.dex	4404	/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.gokomozunoxi.duhe/app_ded/8jqXFS16ssyVkyRvRndNy2rEJciVeaH8.dex --output-vdex-fd=50 --oat-fd=46 --oat-location=/data/user/0/com.gokomozunoxi.duhe/app_ded/oat/x86/8jqXFS16ssyVkyRvRndNy2rEJciVeaH8.odex --compiler-filter=quicken --class-loader-context=&
/data/user/0/com.gokomozunoxi.duhe/app_ded/8jqXFS16ssyVkyRvRndNy2rEJciVeaH8.dex	4250	com.gokomozunoxi.duhe

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.gokomozunoxi.duhe
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText	com.gokomozunoxi.duhe
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId	com.gokomozunoxi.duhe

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.gokomozunoxi.duhe

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.gokomozunoxi.duhe

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.gokomozunoxi.duhe

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

Application may abuse the accessibility service to prevent their removal.

evasion

Prevent Application Removal

T1629.001

ioc	Process
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.gokomozunoxi.duhe

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.gokomozunoxi.duhe

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.gokomozunoxi.duhe

Reads information about phone network operator. 1 TTPs
discovery

System Network Configuration Discovery
T1422

Requests disabling of battery optimizations (often used to enable hiding in the background). 1 TTPs 1 IoCs

evasion

User Evasion

T1628.002

description	ioc	Process
Intent action	android.settings.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS	com.gokomozunoxi.duhe

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.gokomozunoxi.duhe

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.gokomozunoxi.duhe

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.gokomozunoxi.duhe

com.gokomozunoxi.duhe
1⤵
- Removes its main activity from the application launcher
- 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)
- Requests disabling of battery optimizations (often used to enable hiding in the background).
- 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)
PID:4250
- /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.gokomozunoxi.duhe/app_ded/xaTm1S4EJf6nViI3hhQPztQZ9LwxibwZ.dex --output-vdex-fd=43 --oat-fd=44 --oat-location=/data/user/0/com.gokomozunoxi.duhe/app_ded/oat/x86/xaTm1S4EJf6nViI3hhQPztQZ9LwxibwZ.odex --compiler-filter=quicken --class-loader-context=&
  2⤵
  - Loads dropped Dex/Jar
  PID:4277
- rm -r/data/user/0/com.gokomozunoxi.duhe/app_ded/xaTm1S4EJf6nViI3hhQPztQZ9LwxibwZ.dex
  2⤵
  PID:4302
- rm -r/data/user/0/com.gokomozunoxi.duhe/app_ded/oat/x86/xaTm1S4EJf6nViI3hhQPztQZ9LwxibwZ.vdex
  2⤵
  PID:4316
- rm -r/data/user/0/com.gokomozunoxi.duhe/app_ded/oat/x86/xaTm1S4EJf6nViI3hhQPztQZ9LwxibwZ.odex
  2⤵
  PID:4335
- /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.gokomozunoxi.duhe/app_ded/8jqXFS16ssyVkyRvRndNy2rEJciVeaH8.dex --output-vdex-fd=50 --oat-fd=46 --oat-location=/data/user/0/com.gokomozunoxi.duhe/app_ded/oat/x86/8jqXFS16ssyVkyRvRndNy2rEJciVeaH8.odex --compiler-filter=quicken --class-loader-context=&
  2⤵
  - Loads dropped Dex/Jar
  PID:4404
- rm -r/data/user/0/com.gokomozunoxi.duhe/app_ded/oat/x86/8jqXFS16ssyVkyRvRndNy2rEJciVeaH8.vdex
  2⤵
  PID:4449
- rm -r/data/user/0/com.gokomozunoxi.duhe/app_ded/oat/x86/xaTm1S4EJf6nViI3hhQPztQZ9LwxibwZ.vdex
  2⤵
  PID:4463
- rm -r/data/user/0/com.gokomozunoxi.duhe/app_ded/oat/x86/xaTm1S4EJf6nViI3hhQPztQZ9LwxibwZ.odex
  2⤵
  PID:4480
- rm -r/data/user/0/com.gokomozunoxi.duhe/app_ded/oat/x86/8jqXFS16ssyVkyRvRndNy2rEJciVeaH8.odex
  2⤵
  PID:4498
- rm -r/data/user/0/com.gokomozunoxi.duhe/app_ded/8jqXFS16ssyVkyRvRndNy2rEJciVeaH8.dex
  2⤵
  PID:4517

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

Hide Artifacts

T1628

Suppress Application Icon

T1628.001

User Evasion

T1628.002

Impair Defenses

T1629

Prevent Application Removal

T1629.001

Input Injection

T1516

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 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.gokomozunoxi.duhe/app_ded/xaTm1S4EJf6nViI3hhQPztQZ9LwxibwZ.dex

Filesize
1.5MB

MD5
bafd479185fccc355d0ad370e2f81491

SHA1
ba31b8293b54e82b8658d4e32d0f026399c1a618

SHA256
79272df7cbd774b790b489d307c3451f0c42f27598f928c9403b8c3f3c4fce88

SHA512
3ce22fe9a5fb6ca937743be23e67a03856693a78d12172e06b5610ed1b5c5af34adcdb8ec1e8e7d104d33027472a265f0fa8ab91128308b0faa95d52834ed8de

Download Submit
/data/data/com.gokomozunoxi.duhe/no_backup/androidx.work.workdb

Filesize
4KB

MD5
f2b4b0190b9f384ca885f0c8c9b14700

SHA1
934ff2646757b5b6e7f20f6a0aa76c7f995d9361

SHA256
0a8ffb6b327963558716e87db8946016d143e39f895fa1b43e95ba7032ce2514

SHA512
ec12685fc0d60526eed4d38820aad95611f3e93ae372be5a57142d8e8a1ba17e6e5dfe381a4e1365dddc0b363c9c40daaffdc1245bd515fddac69bf1abacd7f1

Download Submit
/data/data/com.gokomozunoxi.duhe/no_backup/androidx.work.workdb-journal

Filesize
512B

MD5
c09b74ff25dfcc7989b3928c8b2fbfb5

SHA1
124c4c10da476a4c4114420f3a1b8d82d86308f3

SHA256
91b2f21ee69eac40f150e458624f91582e7cba3889e26813c90f6a75ae48f20f

SHA512
d34c622f72054f363c1f20f67586b67e1b4330601237fa4804022a924a7e495b48d668dff35e09757fbb85b1231d1dddcbd7c4b0b9d05dcb0420f70ae1729a59

Download Submit
/data/data/com.gokomozunoxi.duhe/no_backup/androidx.work.workdb-shm

Filesize
32KB

MD5
bb7df04e1b0a2570657527a7e108ae23

SHA1
5188431849b4613152fd7bdba6a3ff0a4fd6424b

SHA256
c35020473aed1b4642cd726cad727b63fff2824ad68cedd7ffb73c7cbd890479

SHA512
768007e06b0cd9e62d50f458b9435c6dda0a6d272f0b15550f97c478394b743331c3a9c9236e09ab5b9cb3b423b2320a5d66eb3c7068db9ea37891ca40e47012

Download Submit
/data/data/com.gokomozunoxi.duhe/no_backup/androidx.work.workdb-wal

Filesize
108KB

MD5
603f313ca75cfcabc624f9c5bf3a924c

SHA1
cb6ffdee34293d67c111ccd1f5631c07cb18efa3

SHA256
f2595b061b9478aaee1634e6acac588da466fc8443a15ecbf5f68be4d29eeec8

SHA512
4769267f1b337c22e5b45f10f6251e4a9cbd45d50d94140d5b7da2ba9f194e6c5f11222c1630943aeb2ab96da7f8df415fbe1c92bf076ed30a04851ea3df5ab7

Download Submit
/data/data/com.gokomozunoxi.duhe/no_backup/androidx.work.workdb-wal

Filesize
173KB

MD5
0a7e487ca1eeac58cc7c3a671cdfd08b

SHA1
0fe069a56c1be03285eba50428de10f75053f17f

SHA256
0f896d8ce5c7333b3e68f3279cf00c82b9581c10978636190c8b1cfd4533ae50

SHA512
7d30920aba435a02c84e19ae4ca34cc6e4421543623fcdc749db3e2ac71c26672474ab0ff47eb78dabb1c7c174db0213001da2b4a138f0caeb9b852bbdd3916e

Download Submit
/data/data/com.gokomozunoxi.duhe/no_backup/androidx.work.workdb-wal

Filesize
16KB

MD5
44e0b5f62f2aada9dc2210f52026500b

SHA1
bac006bd15dcceb4dbe0d0dcbfe65e2d8fe78f6b

SHA256
e22ae543c9be31282198bc74536bf1a94fb2526f874d1aa1230dbad1fbd9af1e

SHA512
b8b6f69df64850df0f1ab5329adb361675e36d62df4aea20fc348d12141f0af45946f679ee77508fd3fc95423767e7445ea2f0222cff39b235afc30fedd15ffc

Download Submit
/data/data/com.gokomozunoxi.duhe/ۦۖ۫/ۦۖ۫/ۦۖ۫/ۦۖ۫/ۦۖ۫/ۦۖ۫/ۦۖ۫/ۦۖ۫/ۦۖ۫/ۦۖ۫

Filesize
1.4MB

MD5
e88d2a8037572ad0d4ddcb316e4513e4

SHA1
a7379600aec54e8f4cb690a5e9c988e8447742db

SHA256
6e99a9c8ebab0baecf2d7bec00a4e8e8771f8c7a91e6000434b9870c5f47e5e0

SHA512
5604c721ce88effcfaef4b61081158aefae4580ef51a38b712ee7916c4a8340da3f67eaa32d3c679bc340f359d8933fba379248f4f1bca2b41b7a5aacafea9de

Download Submit
/data/data/com.gokomozunoxi.duhe/ۦۖ۫/ۦۖ۫/ۦۖ۫/ۦۖ۫/ۦۖ۫/ۦۖ۫/ۦۖ۫/ۦۖ۫/ۦۖ۫/ۦۖ۫.

Filesize
8B

MD5
1570cb876bf03d1d797f7c2ebbda6703

SHA1
58022ca5da87610607337e4c19be20e23c0319f7

SHA256
2bb457f66b37f4856322fb46fdd6252cbebd4b6575580b054897561d05b6b7ea

SHA512
6a7a1a2369523f91a047f1e92b77315baab489aa66ca81351a94eefe47d94a3ae40bb6302f694a94c62874cc70f05f70bbca811bbbca7a5c5961461a89f663cb

Download Submit
/data/user/0/com.gokomozunoxi.duhe/app_ded/xaTm1S4EJf6nViI3hhQPztQZ9LwxibwZ.dex

Filesize
1.5MB

MD5
ed5b0226d49e9cd902ca231508d9df66

SHA1
4364f2e22418706c92e0fb5352f05d635fd54551

SHA256
76d450e9f86874e5045a6994e8313d823a437849f63818d95ea754f366944030

SHA512
d6dcbaccd731526bda4edf5a6960e34e1aa7bc26130002b3bd7a12430c4c2c42393d715620f40f8939c96c6782952707a223007368557724755a7aa71c76667c

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Mobile v15

Replay Monitor

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Downloads