ermac | b47a6bbf83c728be3b9d9fe52130039ca0d98f3705057ad93182f86a7c169c18

Analysis

max time kernel
179s
max time network
184s
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
03-07-2024 22:04

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General

Target

b47a6bbf83c728be3b9d9fe52130039ca0d98f3705057ad93182f86a7c169c18.apk
Size

1.1MB
MD5

c09cd63928c32c177b024009a34a9cca
SHA1

eba6dca7a2a5f1f33b5751e61cde61e9bcbdd22a
SHA256

b47a6bbf83c728be3b9d9fe52130039ca0d98f3705057ad93182f86a7c169c18
SHA512

de406c59eada58f29dfb32a54d9115a8b21f9224b16d49c30613be5bb4ef4682496cc80aae27c77ee67d40469105c733c2f3b4e9d34cd6ae6fe8f620fb737581
SSDEEP

24576:T9+qyeb9cyB4b4hs2XABT3d2a8wQqDdVT6rnYT6rnUwQqDuoz0s0vEe0zK+g/vZ8:T9Rdg4h3XIt7DdYVHDu5s0p0zK+g/Q3

Score

10^/10

ermac banker collection credential_access discovery evasion impact infostealer persistence stealth trojan

Malware Config

Extracted

Family

ermac

http://94.156.8.11:3434

AES_key

Signatures

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

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

stealth trojan evasion

Suppress Application Icon

T1628.001

pid	Process
4256	com.cusexetilogevi.jiho

Makes use of the framework's Accessibility service 4 TTPs 3 IoCs

Retrieves information displayed on the phone screen using AccessibilityService.

collection 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.cusexetilogevi.jiho
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId	com.cusexetilogevi.jiho
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText	com.cusexetilogevi.jiho

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.cusexetilogevi.jiho

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.

evasion persistence

Foreground Persistence

T1541

description	ioc	Process
Framework service call	android.app.IActivityManager.setServiceForeground	com.cusexetilogevi.jiho

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.cusexetilogevi.jiho
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.cusexetilogevi.jiho
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.cusexetilogevi.jiho
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.cusexetilogevi.jiho
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.cusexetilogevi.jiho
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.cusexetilogevi.jiho
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.cusexetilogevi.jiho

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.cusexetilogevi.jiho

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

evasion

User Evasion

T1628.002

description	ioc	Process
Intent action	android.settings.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS	com.cusexetilogevi.jiho

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.cusexetilogevi.jiho

com.cusexetilogevi.jiho
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:4256