ermac | 725c2cb1c28c05dc82dc93927b936d3a835324367576b3cf18af467c5752301b

Analysis

max time kernel
40s
max time network
151s
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
08/04/2025, 22:30

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General

Target

725c2cb1c28c05dc82dc93927b936d3a835324367576b3cf18af467c5752301b.apk
Size

2.9MB
MD5

75d6c41d247cbe0e9bfa784e07ff700f
SHA1

2dfaf4266166f177280a2ad2c462c0bae195ba8d
SHA256

725c2cb1c28c05dc82dc93927b936d3a835324367576b3cf18af467c5752301b
SHA512

f261756135693acec2383e4f7b8e36fa2524b2a70c007706a4c6a898f4fb8d8f7858987820ee5e00eacbab642c88ad38a802984f82e1e3ee9cdc2d94aa677939
SSDEEP

49152:IqHzAFvKkY3rT1Ky+5IWfYBoezOVY6ANw6aES6pFU2t7j3MGlo17+hZ0INvBYabV:5Uv3GhR+5eoCOrjWS6N7j8g3T5Yq1API

Score

10^/10

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

Malware Config

Extracted

Family

ermac

http://176.123.169.239

AES_key

Extracted

Family

hook

http://176.123.169.239

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/4437-0.dex	family_ermac2
behavioral1/memory/4394-0.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.tencent.mm/app_DynamicOptDex/GCwu.json	4437	/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/GCwu.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.tencent.mm/app_DynamicOptDex/oat/x86/GCwu.odex --compiler-filter=quicken --class-loader-context=&
/data/user/0/com.tencent.mm/app_DynamicOptDex/GCwu.json	4394	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⤵
- 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:4394
- /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/GCwu.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.tencent.mm/app_DynamicOptDex/oat/x86/GCwu.odex --compiler-filter=quicken --class-loader-context=&
  2⤵
  - Loads dropped Dex/Jar
  PID:4437

Network

MITRE ATT&CK Mobile v16

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

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/GCwu.json

Filesize
703KB

MD5
48f060bb8032843adf14387ccfd28dd3

SHA1
e209254102b6b380a1cddbd6f3818f9374882f72

SHA256
3ebda64f76fcbc5b76009550e9119bb80b34bbdcf9b937a3d26c38843bc52f69

SHA512
f9e579ba2a097f0ea6567c7a93cad18640f4c59ee79c7401c861994f4130f56048feb7899ccaab7f893f109a9ebf5d10f0ae4f5ac3838a42a57099b9784fcc00

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

Filesize
703KB

MD5
b28a519a74a079bff0617f1ac5e9893a

SHA1
38f5ce5ea1b55a27b3fb561e2e64bba5df020085

SHA256
993f18d9a821c513bd87c17c55ccbf8842cc3cc0615b760ebd8d6a02e9e3da42

SHA512
b626e5561710b0bac0b774b6b68bdddf9635428672a67214eed42b40d1bc465d6b8342bc40a14c39f594f4dcff61361800c5d2bebcde03adb78aff38a59c6dbf

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
599c8d705c2f84066c3e80885a8afffb

SHA1
8f3c0989b086bbe8f6133ad68c9008b72a2d829d

SHA256
653794a78ace752f3652d40155c4637254e8493e8694a57fd8ef94bbbc43818a

SHA512
2eab8bf609cbbf6c50004708d9caff8f36c8d5bec40ed6dc4725ad1b649e21a99c322fb46d6cdc14cb056900c5073c469a491c2782b72c977a44f60c0ff910d8

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
6a82613d77f341660d990086a09a0ea5

SHA1
fa9972b5af704fa1e169830dbc54c7d33d339179

SHA256
166be8f5d28adc19e418150225f233c077f69e2490474a1e76cce30490ca27bd

SHA512
cfafa63a7041cbe925a6931ee5e8d2a20f597b9f74bb3598889ff2bc73443506828a46d4ae814d89558fb3bb469280cc23662f84404253531ccd9169325e77f5

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

Filesize
173KB

MD5
4fd5aaebfc3e5c4ee91bfa8bd96e2d7f

SHA1
31b682625efb8ff354f993fb27768e5abf552a45

SHA256
b136b71fe74b5013507c1d49a736754098ff5c7e4ecd52e3203fbeee5fa437db

SHA512
cb5626ce70b5bd111ca06788bb986faa5cf8c54b7f70c062cb3fa636d73e4bf1a6e691c4dd9dae39097e41d12ffebc27c872359b2b1edefa58a42e515fbbc53d

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

Filesize
16KB

MD5
5971f365247dbff0bb9d1949689122b9

SHA1
42c05400565904a9ae9e754fc0a52406e9e80454

SHA256
04d37ed8e7696582d9d273d49e1fb2deef7606c3b6de3108190fa0b04f77fdbf

SHA512
269f47681be4f61e48a3fa437e5b4497f0657134915647d71530dd27fff2e9d4834447a7f7d6a38b64686fb7f7712ce821b832d6a0d5a4caedc82dae2d3d6d86

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

Filesize
1.5MB

MD5
95767193b8b25dfc70f6812c3bd48b8f

SHA1
1cdffcfd09fda484b0212865b8feca7c5901e815

SHA256
0ca210ac5d2ed3bc9d4f230e215352c11dc7a9437c3b158c7ffb39d770c02760

SHA512
660807dda80475a4f477b13cbfb31127df88df7dba4d870ac44c5c307c01ebb294b424cf8a2eb0ffa51fd826079e7dba9f65485c4c344d2b282afcdbc7fc9f33

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

Filesize
1.5MB

MD5
2ed7fe2320b0bbc4d75b899f28c6c918

SHA1
fda0b763ac36fc014568d3ee29e424343b75278b

SHA256
0d448c1c4915a9ab1b94c1d8757ec4ee09a5973bf4e2e1661a9ec65e673b7b38

SHA512
43a9c85e3f127caea4a448ab08342cb041e29e5087473dd733e59285a75bf518f7358c5ea1f4c910ce75d637df321968979c1c8e69a2417b1278191d38f2279b

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Mobile v16

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Downloads