ermac | a8b38eff2d4b5d53f031335b6956ec5e318333a5d71b9ba494a80cdd4ec0635b

Analysis

max time kernel
179s
max time network
166s
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
19-08-2024 22:01

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General

Target

a8b38eff2d4b5d53f031335b6956ec5e318333a5d71b9ba494a80cdd4ec0635b.apk
Size

1.6MB
MD5

9889bf36ea2bfead9f8ad5d55d54d9f8
SHA1

678e78dd62d1dfa2487212246862ad86261a3337
SHA256

a8b38eff2d4b5d53f031335b6956ec5e318333a5d71b9ba494a80cdd4ec0635b
SHA512

f77e7c2c47ff8c5408a91799005c38602a4d2f55badb243f7fd54dd22fec41dbfffcc18e76a68f563ca5d28ddc7edbb966ae96c697f6767ff5fdc68d531839e1
SSDEEP

24576:9g/S2jN3z1Xzej3KFLUC26Wl3fgDtTTXZPLY7YXZ4pCKm57AHQJj7Xcj:9g/VN3z1Xy+LQl4JTjpoYm7mPBI

Score

10^/10

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

Malware Config

Extracted

Family

ermac

http://audkzmzc.xyz ; http://auvatkijn.xyz ; http://aukivmansik.xyz ; http://aulalizbxga.xyz ; http://augo3kkvx.xyz ; http://auxzaknjan.xyz

http://audkzmzc.xyz

http://auvatkijn.xyz

http://aukivmansik.xyz

http://aulalizbxga.xyz

http://augo3kkvx.xyz

http://auxzaknjan.xyz

AES_key

Extracted

Family

hook

http://audkzmzc.xyz ; http://auvatkijn.xyz ; http://aukivmansik.xyz ; http://aulalizbxga.xyz ; http://augo3kkvx.xyz ; http://auxzaknjan.xyz

http://audkzmzc.xyz

http://auvatkijn.xyz

http://aukivmansik.xyz

http://aulalizbxga.xyz

http://augo3kkvx.xyz

http://auxzaknjan.xyz

AES_key

Signatures

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

Ermac2 payload 2 IoCs

resource	yara_rule
behavioral1/files/fstream-1.dat	family_ermac2
behavioral1/memory/4259-1.dex	family_ermac2

Hook
Hook is an Android malware that is based on Ermac with RAT capabilities.
rat trojan infostealer hook

Loads dropped Dex/Jar 1 TTPs 3 IoCs

Runs executable file dropped to the device during analysis.

evasion

Download New Code at Runtime

T1407

ioc	pid	Process
/data/user/0/com.ruyulovowivocu.sigi/app_ded/oPOTBmNoBJDXkNvNp7o6ggyzN0lFPYua.dex	4259	com.ruyulovowivocu.sigi
/data/user/0/com.ruyulovowivocu.sigi/app_ded/oPOTBmNoBJDXkNvNp7o6ggyzN0lFPYua.dex	4288	/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.ruyulovowivocu.sigi/app_ded/oPOTBmNoBJDXkNvNp7o6ggyzN0lFPYua.dex --output-vdex-fd=42 --oat-fd=43 --oat-location=/data/user/0/com.ruyulovowivocu.sigi/app_ded/oat/x86/oPOTBmNoBJDXkNvNp7o6ggyzN0lFPYua.odex --compiler-filter=quicken --class-loader-context=&
/data/user/0/com.ruyulovowivocu.sigi/app_ded/oPOTBmNoBJDXkNvNp7o6ggyzN0lFPYua.dex	4259	com.ruyulovowivocu.sigi

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.ruyulovowivocu.sigi
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText	com.ruyulovowivocu.sigi
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId	com.ruyulovowivocu.sigi

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.ruyulovowivocu.sigi

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.ruyulovowivocu.sigi

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.ruyulovowivocu.sigi

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.ruyulovowivocu.sigi

Reads information about phone network operator. 1 TTPs
discovery

System Network Configuration Discovery
T1422

Tries to add a device administrator. 2 TTPs 1 IoCs

privilege_escalation impact

Device Administrator Permissions

T1626.001

Account Access Removal

T1640

description	ioc	Process
Intent action	android.app.action.ADD_DEVICE_ADMIN	com.ruyulovowivocu.sigi

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.ruyulovowivocu.sigi

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.ruyulovowivocu.sigi

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.ruyulovowivocu.sigi

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.ruyulovowivocu.sigi

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.ruyulovowivocu.sigi

com.ruyulovowivocu.sigi
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 the mobile country code (MCC)
- Tries to add a device administrator.
- 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:4259
- /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.ruyulovowivocu.sigi/app_ded/oPOTBmNoBJDXkNvNp7o6ggyzN0lFPYua.dex --output-vdex-fd=42 --oat-fd=43 --oat-location=/data/user/0/com.ruyulovowivocu.sigi/app_ded/oat/x86/oPOTBmNoBJDXkNvNp7o6ggyzN0lFPYua.odex --compiler-filter=quicken --class-loader-context=&
  2⤵
  - Loads dropped Dex/Jar
  PID:4288
- rm -r/data/user/0/com.ruyulovowivocu.sigi/app_ded/oPOTBmNoBJDXkNvNp7o6ggyzN0lFPYua.dex
  2⤵
  PID:4313
- rm -r/data/user/0/com.ruyulovowivocu.sigi/app_ded/oat/x86/oPOTBmNoBJDXkNvNp7o6ggyzN0lFPYua.vdex
  2⤵
  PID:4327
- rm -r/data/user/0/com.ruyulovowivocu.sigi/app_ded/oat/x86/oPOTBmNoBJDXkNvNp7o6ggyzN0lFPYua.odex
  2⤵
  PID:4346

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

Abuse Elevation Control Mechanism

T1626

Device Administrator Permissions

T1626.001

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

Lateral Movement

Collection

Input Capture

T1417

GUI Input Capture

T1417.002

Keylogging

T1417.001

Screen Capture

T1513

Command and Control

Exfiltration

Impact

Account Access Removal

T1640

Data Encrypted for Impact

T1471

Input Injection

T1516

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Downloads

/data/data/com.ruyulovowivocu.sigi/app_ded/oPOTBmNoBJDXkNvNp7o6ggyzN0lFPYua.dex

Filesize
1.5MB

MD5
cbcb1c6b9d17e0cd1146a7e3843eb1dd

SHA1
8f9591f835757b8be2bf5e27f1bed383d5048c68

SHA256
d559613e71e7529589d407ee46071fe4c49780c1469f5af4caa024dfb2283154

SHA512
a1bb5f52ac26328bba53ce2156129fa44e4bc4f67143d79f25de11f80ba8279aea0403168adbd419823fbb6372f6ea45ad512f97f5ea00e46ab5c53daa2a4df0

Download Submit
/data/data/com.ruyulovowivocu.sigi/no_backup/androidx.work.workdb

Filesize
4KB

MD5
f2b4b0190b9f384ca885f0c8c9b14700

SHA1
934ff2646757b5b6e7f20f6a0aa76c7f995d9361

SHA256
0a8ffb6b327963558716e87db8946016d143e39f895fa1b43e95ba7032ce2514

SHA512
ec12685fc0d60526eed4d38820aad95611f3e93ae372be5a57142d8e8a1ba17e6e5dfe381a4e1365dddc0b363c9c40daaffdc1245bd515fddac69bf1abacd7f1

Download Submit
/data/data/com.ruyulovowivocu.sigi/no_backup/androidx.work.workdb-journal

Filesize
512B

MD5
e5e4ae4d91001ece3240084dbcd93a16

SHA1
34d16bde54e58eee161df4e76e574a9b14fc5294

SHA256
4d1dc4dd2c8d19f9b36328b91d220c7f7cced8d718b5baf68cee9be568074245

SHA512
b64218e71a50983c8093e9fc697ee28c0f6d6ec4ef5ae31ac4c6128508ad284c2fdb9d5b742b3c3f26f39243eaee5c4c579c5a54f5af9be74952e3664f8b40fc

Download Submit
/data/data/com.ruyulovowivocu.sigi/no_backup/androidx.work.workdb-shm

Filesize
32KB

MD5
bb7df04e1b0a2570657527a7e108ae23

SHA1
5188431849b4613152fd7bdba6a3ff0a4fd6424b

SHA256
c35020473aed1b4642cd726cad727b63fff2824ad68cedd7ffb73c7cbd890479

SHA512
768007e06b0cd9e62d50f458b9435c6dda0a6d272f0b15550f97c478394b743331c3a9c9236e09ab5b9cb3b423b2320a5d66eb3c7068db9ea37891ca40e47012

Download Submit
/data/data/com.ruyulovowivocu.sigi/no_backup/androidx.work.workdb-wal

Filesize
173KB

MD5
ad4cb77ce6ccde14f8b79fa5638646ca

SHA1
f9f03a0f6a6674e6fb17a09ab57523f1fc302531

SHA256
71dddd587cd2b49d7ace52cbb97b65d04e221657e81a3265c9cecedbc2d6ab8d

SHA512
1c7386587337d5505ac0384584336220bae094827156a17794f2e222e3981031426e08b2b8c7d2a3063d1028dc2225600f388b4cf271d4e677f54f71bbe81b6b

Download Submit
/data/data/com.ruyulovowivocu.sigi/no_backup/androidx.work.workdb-wal

Filesize
16KB

MD5
7d1d41a9fe9a005983e75c93ab795a3c

SHA1
fda5c0562342dd10c10775126f7e7a15a701197e

SHA256
1bd8f725883278ddd7bea5822e97a35b974717d1a7d28073fb7a32820c374da1

SHA512
518ded0495a28a67adcf7d2df2b6de6890a5fc6f0b8ac98ab512895735399495d72182b6e84a30e8dc76fa4164b9700fa68efbf5878e148b6569b9abb53a64ca

Download Submit
/data/data/com.ruyulovowivocu.sigi/no_backup/androidx.work.workdb-wal

Filesize
108KB

MD5
cf36faa610d2d4b57934bcc1ee375ecb

SHA1
eee8388ec1715868b2372255c0118c92aba9cd08

SHA256
2a2401b4c8931478b3abfb11ac94c6125bf70e1becff51ee907bd5621a315398

SHA512
d2ed7a97df810fab2bbde8545ea876ce66044d96b43f09c68483299e041c67523d91ae7f1c84eb29b1273eb4642a1bf8e5b1c5d168fb3ad4d7021834a56313cc

Download Submit
/data/user/0/com.ruyulovowivocu.sigi/app_ded/oPOTBmNoBJDXkNvNp7o6ggyzN0lFPYua.dex

Filesize
1.5MB

MD5
76df6886718976cc7a52f31dde5a24f8

SHA1
f144d524543f0efed52b8ed8291670ce165a980c

SHA256
4ae4fdf5f862d15dc9f6cd5927c75ab04a96223b845045d60ee705967faf63cc

SHA512
f1c8165546da7ce8c6e89c4d61e706ceb45dab0882cb6c682a308c41ba2b9240185f945e86c40a9735648d4a932d0e2f7266eafce38e8f91cc450ca47779b6ea

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Mobile v15

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Downloads