ermac | 020a1731f996a6440e29344be68c25cc2238cc6fefbf1c63c1084d6300bb73d0

Analysis

max time kernel
52s
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
01/03/2025, 22:06

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General

Target

020a1731f996a6440e29344be68c25cc2238cc6fefbf1c63c1084d6300bb73d0.apk
Size

3.0MB
MD5

a806c91bc15c6fa250f71b8b45528e1d
SHA1

f9e590ef456303f3ed9aafc3966a20e83a919384
SHA256

020a1731f996a6440e29344be68c25cc2238cc6fefbf1c63c1084d6300bb73d0
SHA512

a2065f004e619319a8d180eace8bd5efb4fc75e40f3c2863d2b57bdcfb44c1431611b5a9f98e7c2749590bb58c96420c04594247284fbdf29f6d27f816ac448a
SSDEEP

49152:XHkuzDKGRYY5pqHp+gsdT0+XC7mCjS0XJQ6TGz+bhYVAqaf8OpY7x+3bPK8lg/PY:XHkHYXdPCFXJFaCbLfDx3ZgH/YyB4CV0

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/4241-0.dex	family_ermac2
behavioral1/memory/4217-0.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/di.json	4241	/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/di.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.tencent.mm/app_DynamicOptDex/oat/x86/di.odex --compiler-filter=quicken --class-loader-context=&
/data/user/0/com.tencent.mm/app_DynamicOptDex/di.json	4217	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:4217
- /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/di.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.tencent.mm/app_DynamicOptDex/oat/x86/di.odex --compiler-filter=quicken --class-loader-context=&
  2⤵
  - Loads dropped Dex/Jar
  PID:4241

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

Replay Monitor

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Downloads

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

Filesize
701KB

MD5
dd507df4888dbaad6c64d5b77b0beb7f

SHA1
dda6f5c082058beb9a60c70858af009a0f71a2d2

SHA256
60cd9fb5dfe86c5328e82d32a4a826a2c00400735ed9adeb15a34c1ace1e5f63

SHA512
d49c12ac5b789dbc684ea18c3afb73d9f583631c73f3497232cccf53040f04396b1ab33941901bce4d0eebefdb42fb750da5a7a7640d32c05a38ac039621d1d7

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

Filesize
701KB

MD5
badc9eb139d9474cded9a53bbb8cac9d

SHA1
5a25dcc8b957c77f65932de8f0cfd056b6d1cff0

SHA256
1723cfc3c10e81e8d9d67a2eae25705c5896afdf3fb0b47210fc094030c6ab97

SHA512
5c26e3564822654e6623a788b3680f141b4334268836251de284503ebbf50eef4ab54d2fde0e44b72f6e9776c91350d143f62fab9c7eb79b78cbf12be60f7c62

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

Filesize
3KB

MD5
98f148149a65cb7daad4630569bc7549

SHA1
ec46751c39b8c6e878a88737c749b5a63dc85e9c

SHA256
754ae8e55adcbd66f2936fa71d5e7427e2804fc06e414023415235ccb3b3e131

SHA512
cdeabe8996efdf824780ede97ef5ed886d1ceaadd0a69797b40fc6a11534439161cecbe3e1fe7ee971fcecc437e633b5965af79a7997e21335ca947080100469

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
c50245ceabfcbaee323dec8d9561d97d

SHA1
3180eac5133e80d7f97928632291a9a524702f49

SHA256
edc1545aaa170c0ca9bc4f5daa6168ccf51801e00ddd1cd54339b94c4734ec9b

SHA512
dd6abd30aa8b38bdf5d83ee593648b071650eee05a5f42e06743035020d172e06d9cbc9a628e335c3885620ca0b050066c365223cf3dcf6ba6563fff2389dc24

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
0675afd47cf1d07100bbbd18ee363439

SHA1
2b17ad6bb0845c2573a0dd32dc9af759fe8d34e2

SHA256
27e141c98323ffaaae563f136e8bc892bda93e742aab0cdef9745362e0ededc6

SHA512
4d23eee65ea5e68bccb256b87caa4302312bf6e9fce6ba3478d4d7a2b55a71de3886e263d64bb4adc596f509e65d621f917999417815a757e16636b6763e9790

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

Filesize
173KB

MD5
c7031c09f68e93dd4a08403fd74ff27f

SHA1
2162f2c49b239eedb2cb862f5c759a26feaec555

SHA256
b1c1f7b93e328ef3172840beffa8bda10dae3ef678e7135c10e65e860c6cd9cf

SHA512
1cd205a4efe932d05271eae27f31e76617eaca48d9b27724174b8c4d64213abf781eacbcc6aa21bc07f44496fe27a7ce6308dbf28a2b9bac50d4d8dbb43def71

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

Filesize
16KB

MD5
9a206ab0cbde4891dddafd73eeaf71e7

SHA1
2b447ec62b450dea59fa0a9f4fa0082084306eb8

SHA256
d5580cd62ff16c0c723a5ca21bd80cd2b51586c986c0cbe8ea8794646987bc25

SHA512
8ef2e13dc32a402510d66b0ad688d087c328bc280700b6219cd6feb13e12288177b6736fa7609cef9f5d903b83650deabbe54cc9e161fb3fd55a34b17e26fc41

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

Filesize
1.5MB

MD5
e58a8f73dcd0f7fe24a968c2d81c0599

SHA1
c563881ee1805b52478c6c38b141471cc9d63c63

SHA256
28f0d836560a8066c2c1fc514d94fea8b2cf94790ad24c670976c7f567efb2e2

SHA512
452354150a349391a43e1eea08f6a764d3199fc4b8cbf392e69f3ef7a7e6ccb1525ac4da718dd2419664d2910f2ee7de1e9b61b6f7880816f139ba240bdc442d

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

Filesize
1.5MB

MD5
7f60b07ed6592877ff7d6a081eebe253

SHA1
2005ba9cbb222e2d5fef82f91223d32c5bb1a71e

SHA256
841459c86ceed636626616bc027ead9721cdb9c015492802a925a2b0edf0a7c1

SHA512
d180fb35c7550d0952f9c6952093024b016d1dce47dc814414181f5f36ae020f7456fafbd46d101934bd2392e57e102435c6a3ad02ca5c29f301580a05712e4a

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Mobile v15

Replay Monitor

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Downloads