ermac | 46fe13f0c740fa954950b7d949416add06b3132626f4135d7eef9e0237cc7c4d

Analysis

max time kernel
150s
max time network
152s
platform
android_x86
resource
android-x86-arm-20240624-en
resource tags

androidarch:armarch:x86image:android-x86-arm-20240624-enlocale:en-usos:android-9-x86system
submitted
23/02/2025, 22:01

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General

Target

46fe13f0c740fa954950b7d949416add06b3132626f4135d7eef9e0237cc7c4d.apk
Size

964KB
MD5

5096578c781d9dfc685c5a44aefe7d50
SHA1

f60e5cc00feb81a018e8fc6bee474d9737d13689
SHA256

46fe13f0c740fa954950b7d949416add06b3132626f4135d7eef9e0237cc7c4d
SHA512

972b7c212c6fcdf63970ebf78f24c2aa07d4c30be5cd2020c7977ef361ded1f314702095b558cb94407e03108cbad566001e29064f8f691f6f9eb295fab90f14
SSDEEP

24576:9y5bZfBeuAYFaQpHEKgQLSqdF9SOVIYpg/DVxp:Y5bZpeuFmPQ+qEOOYpg/fp

Score

10^/10

ermac banker collection credential_access defense_evasion discovery evasion impact infostealer persistence stealth trojan

Malware Config

Extracted

Family

ermac

http://176.65.137.197

AES_key

Signatures

Ermac
An Android banking trojan first seen in July 2021.
banker trojan infostealer ermac
Ermac family
ermac

Removes its main activity from the application launcher 1 TTPs 1 IoCs

stealth trojan evasion

Suppress Application Icon

T1628.001

pid	Process
4312	com.woholudejisu.pewiyu

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.woholudejisu.pewiyu
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfoByAccessibilityId	com.woholudejisu.pewiyu
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId	com.woholudejisu.pewiyu

Queries a list of all the installed applications on the device (Might be used in an attempt to overlay legitimate apps) 1 TTPs
banker discovery

Security Software Discovery
T1418.001
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.woholudejisu.pewiyu

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.woholudejisu.pewiyu

Performs UI accessibility actions on behalf of the user 1 TTPs 7 IoCs

Application may abuse the accessibility service to prevent their removal.

evasion

Prevent Application Removal

T1629.001

ioc	Process
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.woholudejisu.pewiyu
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.woholudejisu.pewiyu
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.woholudejisu.pewiyu
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.woholudejisu.pewiyu
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.woholudejisu.pewiyu
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.woholudejisu.pewiyu
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.woholudejisu.pewiyu

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.woholudejisu.pewiyu

Queries the unique device ID (IMEI, MEID, IMSI) 1 TTPs
discovery

System Network Configuration Discovery
T1422

Requests disabling of battery optimizations (often used to enable hiding in the background). 1 TTPs 1 IoCs

defense_evasion

User Evasion

T1628.002

description	ioc	Process
Intent action	android.settings.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS	com.woholudejisu.pewiyu

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.woholudejisu.pewiyu

com.woholudejisu.pewiyu
1⤵
- Removes its main activity from the application launcher
- Makes use of the framework's Accessibility service
- Acquires the wake lock
- Makes use of the framework's foreground persistence service
- Performs UI accessibility actions on behalf of the user
- Queries the mobile country code (MCC)
- Requests disabling of battery optimizations (often used to enable hiding in the background).
- Uses Crypto APIs (Might try to encrypt user data)
PID:4312