ermac | 7d31e6e4ebe8a39fe457e40286db9158e93d981da07aee2deca041309e6f43c5

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
05/03/2025, 22:05

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General

Target

7d31e6e4ebe8a39fe457e40286db9158e93d981da07aee2deca041309e6f43c5.apk
Size

2.9MB
MD5

9361ef2e226d4f9fbd9fdb93f0a8c4cf
SHA1

40482f000e317a84d4468fc348a8cd7424997acc
SHA256

7d31e6e4ebe8a39fe457e40286db9158e93d981da07aee2deca041309e6f43c5
SHA512

016ddfe60ba0296c35a37ffa8c0f3d66fb970042b3701068004c52d7bbe221c3446afe1ca380b3a2c2c316a5e716f7f4281f6c42fb006fd8aaf16d917ad9977f
SSDEEP

49152:Dm9/oDLptsvFf3nw/YSI2nWyjavqHC+6sdT0+XsAz70RGr6x+v3YIji7ywhYVAqX:Dmpstuf3nw/22+UdPsAi3IjYywLfDrhC

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://91.107.127.201

AES_key

Extracted

Family

hook

http://91.107.127.201

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/4248-0.dex	family_ermac2
behavioral1/memory/4222-0.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
4222	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/Lwds.json	4248	/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/Lwds.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.tencent.mm/app_DynamicOptDex/oat/x86/Lwds.odex --compiler-filter=quicken --class-loader-context=&
/data/user/0/com.tencent.mm/app_DynamicOptDex/Lwds.json	4222	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:4222
- /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/Lwds.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.tencent.mm/app_DynamicOptDex/oat/x86/Lwds.odex --compiler-filter=quicken --class-loader-context=&
  2⤵
  - Loads dropped Dex/Jar
  PID:4248

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/Lwds.json

Filesize
702KB

MD5
ed9c7aa4973092f7a19c112fbee1d0b1

SHA1
763adf2e5310239e21c532e44abe3e90c7cae95b

SHA256
5ae89702641a1fd25e4a9b5964fa10fe5582053c3e283d804283ecdfb242336a

SHA512
3b94988d6ea2a2e105cd8cd267cdde6a48dc711948a41fdda8fa21ef9d62a5596dc8bfe5e47c5dc6d030d37d533de333adb9f809c7591917071e7117ff4766d3

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

Filesize
702KB

MD5
5c7070e86c9405def6ff8b458f0c7c71

SHA1
2d232932bdee30a7df9d837eeb62fcf27ef0be21

SHA256
bba492c5bb82c610aa9a620e5dc7db51960e95eac6ddcd3c8e6240f8e4427aba

SHA512
4e27678c2e552657e85b851903d3ec42a47465864bd3a83d733b4bdfbcc7cee96afa01f472d8714691dfff8feb877ad9adba0ad35c5df2857f906d1574ab8c4c

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
aa85a6726a81246b8252ca25bb64ed5b

SHA1
ebe83ed412b8c9c1f2d80ffd0de45d023cc402b8

SHA256
5bcd0d502a0a96ea6bf0b0cddf97ea0506ea8af581f39c8abfb675fea584e3fd

SHA512
1a1d0f874c6f56f1e63db4388fb6993040af7bdf124bcbe6a582295b3e2b3f4eac2110650da0994a8546cc1cfedb67df992b94b862286f856c29e71ebf08c1b0

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
541d57b83a9035ca154d168e2a728f14

SHA1
4751e976fa5ca2443143d74c9c2afe20fc7e845b

SHA256
9a7b6c52bf7e2034e449deba39c4d6f43b35f3c50dcc9aef070b890b0ebc0e67

SHA512
5a379bff0ec4ad6c0b98322c141acf7d28d1f394d8d79e429104d88ed1c2c975c652d26a770c9fb2a39fbe0ddbabe1e229e4ccf41652d10506cf3884498f98fe

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

Filesize
173KB

MD5
b92682698f63a46771e384b7f04a0de3

SHA1
4eef3c174cd5b8d91141296ebbb30bf667e20094

SHA256
1db1f7cfbf12ee5bd83719b52083779e10aa3d712b696f2bafea2e9d8c60e8ec

SHA512
6bc5add7ccd6d7cdc8cdd07a38eea8886370d422c41edb9efcaa13f02f095c5a39a0ad20253485d6203d642ba1cc90b06529b4472cd3fbea48f1652899b51a90

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

Filesize
16KB

MD5
2f4fd9992f65d1643ebd0d3335248a6e

SHA1
3fc8628f56215abf4a001dd63a313fdfea54db3c

SHA256
af97a2e5c987f2855530c0516c30603ac2971bb10aed61210abad4bad443d1c6

SHA512
2537e46cebe53052fdf1179c1424ee07fb5b7a89a6d3856725dcf5b8c5d04d9489dade09c2d3a37e2a27747e469b64ce9338b6656b1cd848e3f80f32d4252c82

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

Filesize
1.5MB

MD5
b2ec7bd35a3192d6f6d31c40553cfaaa

SHA1
41a179e828a900d3934525ffa6e31887b4ae138b

SHA256
b9b4437984074db389e44371a9d994b931e0b48b81675be7626861b03a31d9ab

SHA512
6622514102a16f5de44b043b4dacc9adffbe3d67abee6d7268cc9c1efc689288a05f5a3a147e9f11370056db00fe2119d14319d478a6b80f35fa84c53e167663

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

Filesize
1.5MB

MD5
89e0d7ab978e192a89d66d518e3ddbfd

SHA1
2c908a8b8f56479fdb3e5b1ab0a0e8fef5673e70

SHA256
955de22dedd8eef99abf727b30cfa42836e4a9eb2d427ee5977c10e6d62d4005

SHA512
be014d2788512c6747595dd0f912043e1197543e75bd622ca47a5b080783a7e59ac5341c68a87af8a92487d789ae40ce4aebf747ae4e12e5f1e2575cc4570dd1

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Mobile v15

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Downloads