ermac | 5a5437f1af8d581e519aebf20807a6bf67dfc8460297ff7dcfe18509e1c89375

Analysis

max time kernel
51s
max time network
155s
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, 22:01

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General

Target

5a5437f1af8d581e519aebf20807a6bf67dfc8460297ff7dcfe18509e1c89375.apk
Size

2.9MB
MD5

620cea4ff90b07896ebc66cfff4838d9
SHA1

287cd8ad5d26540b15cc2842adfca4acb21b6d3e
SHA256

5a5437f1af8d581e519aebf20807a6bf67dfc8460297ff7dcfe18509e1c89375
SHA512

3160ee3fa9c567257f5f6e4127400a22d06750daccc1082a7b4f4e751d4a2d9c4b16ae65854a4fd7d88d1f5a9b2d636ce097eb917081f3dc3b6faf20956c707b
SSDEEP

49152:tXHXC6lrv3vxvM0PkhJqHp+HsdT0+Xx/IhYVAqaf8OpY7VKeNUEouJZjOkF1NK8o:tXTh3vxvMSdPx/ILfDfE3tOkFxgNs3yr

Score

10^/10

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

Malware Config

Extracted

Family

ermac

AES_key

Extracted

Family

hook

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/4245-0.dex	family_ermac2
behavioral1/memory/4220-0.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/IB.json	4245	/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/IB.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.tencent.mm/app_DynamicOptDex/oat/x86/IB.odex --compiler-filter=quicken --class-loader-context=&
/data/user/0/com.tencent.mm/app_DynamicOptDex/IB.json	4220	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.findAccessibilityNodeInfosByText	com.tencent.mm
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId	com.tencent.mm
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfoByAccessibilityId	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

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:4220
- /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/IB.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.tencent.mm/app_DynamicOptDex/oat/x86/IB.odex --compiler-filter=quicken --class-loader-context=&
  2⤵
  - Loads dropped Dex/Jar
  PID:4245

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

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

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Downloads

/data/data/com.tencent.mm/app_DynamicOptDex/IB.json

Filesize
702KB

MD5
ed28e658ea832eb253cf3c193ae1855b

SHA1
a6cce884455068c8a8ca757e62600ad046bc9fbb

SHA256
fc72925c858fcb33a3c41dc31f39446c2890e6b3f9c1479aff26e4306d90e55b

SHA512
3e5229be02093c83f371b1f1bb9e96f226c6b5049510e9606a85c8c1cc45b19a659822b28e007382324085e978a2d40f9c5d51a68ef591d568096defab19640c

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

Filesize
702KB

MD5
c4a4e8b12930395357aebd1596aadd4b

SHA1
e7c60c41e4e05191d8bbf89419821e547a22a8fd

SHA256
a56474c25b91b3449eba1db593483c3b41fbf7ecf29f7c09febbc1ff3bf4e13d

SHA512
f7a1988899ef9a4bf661999d2665fd5b7de37b609ec066181f241738de2e15497fe4280cfee6bbedaa46f6327e32d9f97147867fc482ed51d521dc5737c60470

Download Submit
/data/data/com.tencent.mm/app_DynamicOptDex/oat/IB.json.cur.prof

Filesize
3KB

MD5
e1f264b1b9cbae14a78694bb5dcac6c0

SHA1
10eeb11f3e47b04853b0e2eb14cd450501c89d89

SHA256
743560aa2d77427e08af987ebde2e78d342b0fcd74d2d5de5b44ed1c4a1e5867

SHA512
2f52a20fd55d1247320e9bab7d5452d2af1d7fbb1a79b270bcf83dbecb7f5922bb327f8df96c3869687c19e36d92aceb147e671136859e6cfad983a52314a9fa

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
5f2b3d584b3d0cc2b59130617bb55a3c

SHA1
939f6cb2e70b5dcb002d743fc2d4f951bb1cdbe4

SHA256
21e74c28fd5ddb0290e2da10a5573f0846ee59c4e70f118a9130b73898c5a9df

SHA512
1ccef84596e2a72fb254d4cc7a38a7bb90f72cd4d595eef13aff655b4a4b304ec39f4193b1b206b9e8c526b7f6317d3d27ca6029a9833389d33cb59f227ead2c

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
8cbea141844b4f01e16baa1ac6a24f67

SHA1
d779d7d1bf0bb1179202c64634fec1167c1699ca

SHA256
5bfd5db2b8c8df46204f2114aa241aa44413fe8b684c91361bfb92a7977921ac

SHA512
71420b973b5325ce7ae819b2d6f3aae0c20638c729d37ca0ab8aed6acc7192fbcf971625ac5c19ac95f3643b597a9cc6d86ec768c88847d093b240eb16385a13

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

Filesize
173KB

MD5
a7a907c878b8dd6385d3c10f00bbf11d

SHA1
018f823321a5b18a27d41620579bd4d4c8fb983d

SHA256
c341a51486c9b03e5ec303fab7c78bb7879b699ea84b58a8d3e365bf77c9c4cc

SHA512
f297a25d33d48c4ae3671d6355503a11570d89fb5653c2bb432efaafbc48a8fb4e107dae11a5cc5fb65b01366f702f075a807ce7dcb27319961bd290f0b29f09

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

Filesize
16KB

MD5
50eb018ffb96e44bfd4b5674b5856cd1

SHA1
b5f19e006467c9fb8ed2542122734f0b611b40e7

SHA256
f9bfa6539279dc0f2f343cb01474711da5ae1573ace640c19c105823d168e74a

SHA512
d8953e39cd3409cda3524327d63e65812d1229fc38ae78e6a1f41d4834545f6a38765b3c9c765771f8a03fc5e5e4918aa722318a9d6995af70b060a86574a7dc

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

Filesize
1.5MB

MD5
b2ec7bd35a3192d6f6d31c40553cfaaa

SHA1
41a179e828a900d3934525ffa6e31887b4ae138b

SHA256
b9b4437984074db389e44371a9d994b931e0b48b81675be7626861b03a31d9ab

SHA512
6622514102a16f5de44b043b4dacc9adffbe3d67abee6d7268cc9c1efc689288a05f5a3a147e9f11370056db00fe2119d14319d478a6b80f35fa84c53e167663

Download Submit
/data/user/0/com.tencent.mm/app_DynamicOptDex/IB.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