ermac | 6df98f4c4b1a9c147a996854b9624d51828585fdabb6be0b56014d874d9f24d8

Analysis

max time kernel
29s
max time network
33s
platform
android-9_x86
resource
android-x86-arm-20240910-en
resource tags

arch:armarch:x86image:android-x86-arm-20240910-enlocale:en-usos:android-9-x86system
submitted
21/03/2025, 17:35

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General

Target

base.apk
Size

2.9MB
MD5

8942dc88d64e0d87c7f2b4b09c1c24c2
SHA1

f15cdada2a64a6dce065fe7878902b28366eb822
SHA256

d7d84485a7c19a0a90f1d7165ed91d323195ba3c6298159efa4f696453064d8e
SHA512

2a99ac1c16f660efc84a2a5d4b7e946171f15724b229861cdf822a267045a16ce7522d542c026214f61c8b3da20d69e7005a23705db7ab0d084c5dbaca2839f6
SSDEEP

49152:iqHc0DU8Hqd+gCKpIIpVyHDDvmCTkchCv5pZxG/juyUogE2mjFwJBMWdJU0g:IWUiuwKnVwXvmCTx6TGbzAmjFOOWTPg

Score

10^/10

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

Malware Config

Extracted

Family

ermac

http://62.109.30.102

AES_key

Extracted

Family

hook

http://62.109.30.102

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
behavioral4/memory/4239-0.dex	family_ermac2
behavioral4/memory/4214-0.dex	family_ermac2

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

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

stealth trojan evasion

Suppress Application Icon

T1628.001

pid	Process
4214	com.tencent.mm

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.tencent.mm/app_DynamicOptDex/wni.json	4239	/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.tencent.mm/app_DynamicOptDex/wni.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.tencent.mm/app_DynamicOptDex/oat/x86/wni.odex --compiler-filter=quicken --class-loader-context=&
/data/user/0/com.tencent.mm/app_DynamicOptDex/wni.json	4214	com.tencent.mm

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

Retrieves information displayed on the phone screen using AccessibilityService.

collection defense_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.tencent.mm
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText	com.tencent.mm
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId	com.tencent.mm

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.tencent.mm

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.tencent.mm

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.

defense_evasion persistence

Foreground Persistence

T1541

description	ioc	Process
Framework service call	android.app.IActivityManager.setServiceForeground	com.tencent.mm

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.tencent.mm

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.tencent.mm

Reads information about phone network operator. 1 TTPs
discovery

System Network Configuration Discovery
T1422

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.tencent.mm

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.tencent.mm

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.tencent.mm

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.tencent.mm

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.tencent.mm

com.tencent.mm
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
- 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:4214
- /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.tencent.mm/app_DynamicOptDex/wni.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.tencent.mm/app_DynamicOptDex/oat/x86/wni.odex --compiler-filter=quicken --class-loader-context=&
  2⤵
  - Loads dropped Dex/Jar
  PID:4239

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

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

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.tencent.mm/app_DynamicOptDex/wni.json

Filesize
703KB

MD5
f15543ffab9a6d6f5893e945a1a7b44c

SHA1
ec865b13d3c4f568a4898bda57f0278f793993f5

SHA256
8b2c577cf9b14a4eb006c6cadc8ce68b8cbb552a7ab2941e61b86fb146a1c461

SHA512
8fb2fe633a8b44a4e71c415613c45f51e97da6165374763c7ae6b82fbbe5f0f84a88504a43b49e8246613b29e434cefaf385908781572bc42988c71602a29559

Download Submit
/data/data/com.tencent.mm/app_DynamicOptDex/wni.json

Filesize
703KB

MD5
95b4518574cf8d2b50f7e547f9c395c5

SHA1
327a9211c566b1eb452b7d3a696f92c8705a6e07

SHA256
c7172fdeaf1077425ba02f438de48d436f7ffe9bca1a3a971d63fab16cf52648

SHA512
af1c06af7be01e5f696383e3cca858f472cfff573400133bcbdda5a740ab04a48e665ba5102f56143759f8ed382bee40cb94c998f6926272763ecd72a1be12fc

Download Submit
/data/data/com.tencent.mm/no_backup/androidx.work.workdb

Filesize
4KB

MD5
f2b4b0190b9f384ca885f0c8c9b14700

SHA1
934ff2646757b5b6e7f20f6a0aa76c7f995d9361

SHA256
0a8ffb6b327963558716e87db8946016d143e39f895fa1b43e95ba7032ce2514

SHA512
ec12685fc0d60526eed4d38820aad95611f3e93ae372be5a57142d8e8a1ba17e6e5dfe381a4e1365dddc0b363c9c40daaffdc1245bd515fddac69bf1abacd7f1

Download Submit
/data/data/com.tencent.mm/no_backup/androidx.work.workdb-journal

Filesize
512B

MD5
dd195112482a3894b4bff6f0f7a5c53b

SHA1
a51670e246904cab580b5b1b13f5b96d3dace90d

SHA256
3dea8d150b2bd331245cbf4bf7e11e916e95e80f40589c306207e4c0001910eb

SHA512
9922a2ff09979579ec7f056d79655842d8cf92f1e88c16d543497df549c685e418d84590e31e7a8c17414fa471fcd3015843836bce59efc094220edaed2b6c6e

Download Submit
/data/data/com.tencent.mm/no_backup/androidx.work.workdb-shm

Filesize
32KB

MD5
bb7df04e1b0a2570657527a7e108ae23

SHA1
5188431849b4613152fd7bdba6a3ff0a4fd6424b

SHA256
c35020473aed1b4642cd726cad727b63fff2824ad68cedd7ffb73c7cbd890479

SHA512
768007e06b0cd9e62d50f458b9435c6dda0a6d272f0b15550f97c478394b743331c3a9c9236e09ab5b9cb3b423b2320a5d66eb3c7068db9ea37891ca40e47012

Download Submit
/data/data/com.tencent.mm/no_backup/androidx.work.workdb-wal

Filesize
108KB

MD5
081c9539241ee754c4476b37c5e53643

SHA1
b5e8abd5df7e20f6ae13a84d49d68f4d7f84501b

SHA256
0ad384c261dd77c5cdbccb3e582b894b74fa82a0e1053219894d77ea76d1baec

SHA512
e6f65016cbad785d9df5bad7a07eb7e79f880a528e4d3df60a683403ba948fefbefe9f287d92d9cae065af04f927fbc3616a2331185c2b1f2033dc83353816b7

Download Submit
/data/data/com.tencent.mm/no_backup/androidx.work.workdb-wal

Filesize
173KB

MD5
eecf161d36875b1cd9bc19fea8bd7928

SHA1
a5d1dc4ed02ca4b21cbb367a9373e0f78262b111

SHA256
d0fe71214088a6773d34cb7f39dd82d8535c68228bcbf36d599acae56f2da4b1

SHA512
24a33a895876853eb9244c98fb4692aa6d3cb9776195f9a16e454c4982d2746d2eb7976402760dbe014c56c97e88f71a06fb17f81d33410c5c0bb08586d28ce9

Download Submit
/data/data/com.tencent.mm/no_backup/androidx.work.workdb-wal

Filesize
16KB

MD5
eff33055d1ed6e2fab820fb803345586

SHA1
f8883ceb15fdb08386b99d7e6b51d199f33b2fe5

SHA256
f2cc85da7154968103afe8101d5fe5d64fe794fdac2c3e7aba23612d0fe57ebf

SHA512
b0607e6ab9200eff4d27f2fb7454e88e097e28c57b377ff7cc7059a1a01ba37bbe307e51ce0e9300bfdf602eb48a3f98ef728130a48aa460a5493b4881d63b24

Download Submit
/data/user/0/com.tencent.mm/app_DynamicOptDex/wni.json

Filesize
1.5MB

MD5
3e360020d5a32721480229888bece6f1

SHA1
50db197135547e5a400cb19a4055989d506777e5

SHA256
38509b87c451550d5c0a208bb1597683f912b380884f2c99571b65decee2a182

SHA512
bd8a16d29506aa9eaa46c40ab2ddbda321e44e4955a63ed6a209abc4390aea6b5702bba61763337047e806b199181d6a9dc147948094bc4ae24de11a180e0bf4

Download Submit
/data/user/0/com.tencent.mm/app_DynamicOptDex/wni.json

Filesize
1.5MB

MD5
262a46348e7d4b7799c9309cc18007a3

SHA1
2fb00e8962b2ce1543393c4f4b54263f41dcda96

SHA256
75eabb4f26267b415aa36d7bcee79a84c9913ffba0bd8618b753c647c4b67220

SHA512
1c09e060f47c11d443276f47aaf721e7b8458543fc25817662d88bf4b3cedfb3fe6a1795d738d35df66129cbd6ac6ca10e6fda7e0ba898e59e9c8246285e3c4e

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Mobile v15

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Downloads