ermac | 4cffa1649f8fb89bab4738b5913605adc7b67b9a0bb32384901d335f94a97e66

Analysis

max time kernel
41s
max time network
150s
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
19/03/2025, 22:12

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General

Target

4cffa1649f8fb89bab4738b5913605adc7b67b9a0bb32384901d335f94a97e66.apk
Size

3.0MB
MD5

57ce9375e1571b1ec1d8cb36ffad5b75
SHA1

128c17fc8f6dce59502bfb330524900a73a01e79
SHA256

4cffa1649f8fb89bab4738b5913605adc7b67b9a0bb32384901d335f94a97e66
SHA512

fa12f970c1a9edcb167a0c9a1b2f1fa2712010fb76325a82c6cfe1d5772a7c6fa80ad5dd20e62f94a96b2bd9fb4bebfdbec2c38a6d8cc786ec21ff5211fa62ef
SSDEEP

49152:QxXoHQDz3hwIc30hG+PbLqHq+isdT0+XkYSlNyR/Ia/8GBhYVAqaf8OpY7lAtHbZ:QxY8Jc3I1bQdPkYNP8GBLfDntZgf5Syc

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://80.87.197.162

AES_key

Extracted

Family

hook

http://80.87.197.162

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/4287-0.dex	family_ermac2
behavioral1/memory/4261-0.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
4261	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/GiGklII.json	4287	/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/GiGklII.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.tencent.mm/app_DynamicOptDex/oat/x86/GiGklII.odex --compiler-filter=quicken --class-loader-context=&
/data/user/0/com.tencent.mm/app_DynamicOptDex/GiGklII.json	4261	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:4261
- /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/GiGklII.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.tencent.mm/app_DynamicOptDex/oat/x86/GiGklII.odex --compiler-filter=quicken --class-loader-context=&
  2⤵
  - Loads dropped Dex/Jar
  PID:4287

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/GiGklII.json

Filesize
703KB

MD5
7036e1ebc564380e72414a4ae742d14d

SHA1
1d80809e4be3279fd77fccd1edd86051ff1934ae

SHA256
99b48ae8cb05ff46f23cd94d3196e042b37f4949af438eafdebc3aa71459a85f

SHA512
ef793ef449fb8cc773a83efa67d6396d88f7f73b68d7a3c32578f6040e91417b56c26f0ccc3c712b4af4f41fa955b6518463a5e86027192e5ae1db67e8d985dd

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

Filesize
703KB

MD5
ed494f937b47e81787bcaf9f782cd8d9

SHA1
080db0c22e4505cac4fac99d68ebd3d5276d43a3

SHA256
86c34d8dd3a96745efc8129df4615c7c8b6f4e82cb11d13615e77ddfe92d143e

SHA512
2a783a3c4fb4cb0051010c3d1eda1461d2be38c871b0ec6b0112548f6f7790908244d3a20b2946afc1a6734af8a564ece7d57f6f4edcd1a1a81ad46ea5dff188

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
331800f9fedb04a6f72058236bba6f07

SHA1
8689f28f5acdeb19d2e0caecb9fa0602db06b842

SHA256
1406987ec590037f8b51e1b5ff5703e373a0619fa99336da5e3544b9db12118b

SHA512
1a696452034e81305e5eb91f3e8e246252eb04bf896a20a002e3c6eacc33a895bd1cc3a29ba7e8057196266723c871f2aeb48f87bad52f86d84e00c70f4b5062

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
90fc61ea42c539dbc28ece3ef39605e5

SHA1
6eea9a41f10d6bd91d78f0f5473476719c93adf6

SHA256
f2a4e8405fc9060b43a1743c965dbb951ee6ecf92070381dd1ee163b09ef9ec7

SHA512
83076eb6f9ad4e5130e5b5b62ca636c467c87dabffc53f1a7c7b8ea133baa09d2b2b01931bc2cd60e7497b84e3425c347a4f924e2aa0ee866eb676010fbb898f

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

Filesize
173KB

MD5
fddfda0562a0ffbaa7854a7036a8954d

SHA1
44a3063e4d030eeb505bdf1b6db380dd797b8460

SHA256
bc17184b80b18395d243d104e454ce33d172833d4c4bd71aaecfe0e7ff71eec4

SHA512
b811e647e0d29421e58c874480c6f8c8d97c4c26b89e3cef4d241a36d542a9e3a43d75c3206c4b9da0bce104b80f46502ff361a6b9bbe84a027ab3bd0aa70d6d

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

Filesize
16KB

MD5
79075ec9bfab57fbd6f395f99411c5f6

SHA1
39b746fd01af62bea3c52a06d96d4887692047a3

SHA256
7c5f9e34870cd27d0b12e98ba2507ec1e294e608c202074acbf4e29d1de7a90a

SHA512
f4a780c3cc79d4e159a1bfe1fa0e47b714e3095d267869f1de1dacf637a07b0b5d0ef6c351eb1e339577bc5bfdc499f10f5fd8fd5a073970d2c49a6268e237ca

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

Filesize
1.5MB

MD5
b7f823ddfe4c090c69985b2e05807287

SHA1
2d8a8a0a2df9b971efed75eaea3f39ff3521eb3e

SHA256
968ec7b46ea7fe5f42251dd9ebfaf9b9e1978fa8dd57f3eb2cab1957947a529b

SHA512
119a13ef5d10a742b579cc6852b07f5303266093f3b9fd0a87b4810db65f7d08c5424fc9c4b359e64e0158e903ff56285e0c2b9b69f6af14363df0fa4a2e0f2a

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

Filesize
1.5MB

MD5
8abe1776ebc0143c41a8a6d094595815

SHA1
1365273a8f69eaa5d3d2af99783b94c8fa2a2622

SHA256
475d7bf5bc9c08e50677bd53df71fd79d50561bc48a7d5446ca61174fed101ad

SHA512
741528a836f230418ffb4c36df9a3a9b142b0ad1689f0acc3821d3f34b4a4264ba50bb5b73706f13595622d538d259124bec1d7ff5c62ef601a91a5f11702fb7

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Mobile v15

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Downloads