Overview

overview

10

Static

static

6

7cf9de0bb3...c1.apk

android-9-x86

10

7cf9de0bb3...c1.apk

android-10-x64

10

7cf9de0bb3...c1.apk

android-11-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    156s
  • 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
    10-09-2024 22:00

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General

  • Target

    7cf9de0bb33002957d7645ba2c7a4f780ec0937fc21f1471c6b665352a04eec1.apk

  • Size

    1.1MB

  • MD5

    6b64372da9eb946b68afe29f93988e4d

  • SHA1

    c6a22ecd0a29ae96ad795480ec75564c7362b562

  • SHA256

    7cf9de0bb33002957d7645ba2c7a4f780ec0937fc21f1471c6b665352a04eec1

  • SHA512

    aba562609a6171f8c2b4902989c4528b1df3ee269a1a153171fe5c0601850f19d01cbfd6f7da06f6dea6577f7515f643f161421967d690f7f040b73f4b94afe3

  • SSDEEP

    24576:QigmO91v2Ow1G02U9+9+lo/beUjFQXML+VghOjaRZjRqybK:QigmYw1GeWFQXML+VsRZsSK

Score
10/10
ermachookbankercollectioncredential_accessdiscoveryevasionexecutionimpactinfostealerpersistenceratstealthtrojan

Malware Config

Extracted

Family

ermac

C2

http://91.92.242.166:3434

AES_key

Extracted

Family

hook

C2

http://91.92.242.166:3434

AES_key

Signatures

  • Ermac

    An Android banking trojan first seen in July 2021.

    bankertrojaninfostealerermac
  • Ermac2 payload 2 IoCs
  • Hook

    Hook is an Android malware that is based on Ermac with RAT capabilities.

    rattrojaninfostealerhook
  • Removes its main activity from the application launcher 1 TTPs 1 IoCs
    stealthtrojanevasion
  • Loads dropped Dex/Jar 1 TTPs 3 IoCs

    Runs executable file dropped to the device during analysis.

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

    Retrieves information displayed on the phone screen using AccessibilityService.

    collectionevasioncredential_access
  • Queries a list of all the installed applications on the device (Might be used in an attempt to overlay legitimate apps) 1 TTPs
    bankerdiscovery
  • 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
  • Queries the phone number (MSISDN for GSM devices) 1 TTPs
    discovery
  • Acquires the wake lock 1 IoCs
  • 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.

    evasionpersistence
  • Performs UI accessibility actions on behalf of the user 1 TTPs 4 IoCs

    Application may abuse the accessibility service to prevent their removal.

    evasion
  • 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
  • Queries the mobile country code (MCC) 1 TTPs 1 IoCs
    discovery
  • Reads information about phone network operator. 1 TTPs
    discovery
  • Requests disabling of battery optimizations (often used to enable hiding in the background). 1 TTPs 1 IoCs
    evasion
  • Requests enabling of the accessibility settings. 1 IoCs
  • Registers a broadcast receiver at runtime (usually for listening for system events) 1 TTPs 1 IoCs
    persistence
  • 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.

    executionpersistence
  • Uses Crypto APIs (Might try to encrypt user data) 1 TTPs 1 IoCs
    impact

Processes

  • nrv.yqmmemf.oh
    1⤵
    • Removes its main activity from the application launcher
    • 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
    • Performs UI accessibility actions on behalf of the user
    • Queries information about the current Wi-Fi connection
    • Queries the mobile country code (MCC)
    • Requests disabling of battery optimizations (often used to enable hiding in the background).
    • Requests enabling of the accessibility settings.
    • 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)
    PID:4317
    • /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/nrv.yqmmemf.oh/app_apkprotector_dex/classes-v1.bin --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/nrv.yqmmemf.oh/app_apkprotector_dex/oat/x86/classes-v1.odex --compiler-filter=quicken --class-loader-context=&
      2⤵
      • Loads dropped Dex/Jar
      PID:4343

Network

MITRE ATT&CK Mobile v15

Initial Access

Execution

Scheduled Task/Job

1
T1603

Persistence

Event Triggered Execution

1
T1624

Broadcast Receivers

1
T1624.001

Foreground Persistence

1
T1541

Scheduled Task/Job

1
T1603

Privilege Escalation

Defense Evasion

Download New Code at Runtime

1
T1407

Foreground Persistence

1
T1541

Hide Artifacts

2
T1628

Suppress Application Icon

1
T1628.001

User Evasion

1
T1628.002

Impair Defenses

1
T1629

Prevent Application Removal

1
T1629.001

Input Injection

1
T1516

Credential Access

Input Capture

2
T1417

GUI Input Capture

1
T1417.002

Keylogging

1
T1417.001

Discovery

Process Discovery

1
T1424

Software Discovery

1
T1418

Security Software Discovery

1
T1418.001

System Network Configuration Discovery

3
T1422

System Network Connections Discovery

1
T1421

Lateral Movement

Collection

Input Capture

2
T1417

GUI Input Capture

1
T1417.002

Keylogging

1
T1417.001

Screen Capture

1
T1513

Command and Control

Exfiltration

Impact

Data Encrypted for Impact

1
T1471

Input Injection

1
T1516

Replay Monitor

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Downloads

  • /data/data/nrv.yqmmemf.oh/app_apkprotector_dex/classes-v1.bin
    Filesize

    1.5MB

    MD5

    79a4680b0f4d5270e41b56096949d1c8

    SHA1

    00eef360ba587f685e5f0745526031e1d648d4ce

    SHA256

    b90194b0357d4c06a7519897a6f2937e9f0c11b092391a628ed18c30fdf2629c

    SHA512

    41a3d8c7039a060e28431f840c39403cc2fe5ba91800f27c9313f75f686d4dcf341018d1ce26ce0a5f1e234833339ad8a84feb1c6a1e3da2f42419a9797a36b3

    Download Submit

  • /data/data/nrv.yqmmemf.oh/no_backup/androidx.work.workdb
    Filesize

    4KB

    MD5

    f2b4b0190b9f384ca885f0c8c9b14700

    SHA1

    934ff2646757b5b6e7f20f6a0aa76c7f995d9361

    SHA256

    0a8ffb6b327963558716e87db8946016d143e39f895fa1b43e95ba7032ce2514

    SHA512

    ec12685fc0d60526eed4d38820aad95611f3e93ae372be5a57142d8e8a1ba17e6e5dfe381a4e1365dddc0b363c9c40daaffdc1245bd515fddac69bf1abacd7f1

    Download Submit

  • /data/data/nrv.yqmmemf.oh/no_backup/androidx.work.workdb-journal
    Filesize

    512B

    MD5

    2134448c5b5329040925cc4cebe65052

    SHA1

    7602ff92f972b9bb0aaba54aca99562eda069fcd

    SHA256

    efb34d886c4b980820c656626b25bb6dfea8d8af25941a13aabf03adfdc936b7

    SHA512

    d34dacf5e3ab002784181d8a90ed87f7dcaf5ad32a51f588ab9c5bb2ab92dc54d00af1801967bdeb8ed91704d851ee5969b8ecfcd678c188c1a1075242a62d29

    Download Submit

  • /data/data/nrv.yqmmemf.oh/no_backup/androidx.work.workdb-shm
    Filesize

    32KB

    MD5

    bb7df04e1b0a2570657527a7e108ae23

    SHA1

    5188431849b4613152fd7bdba6a3ff0a4fd6424b

    SHA256

    c35020473aed1b4642cd726cad727b63fff2824ad68cedd7ffb73c7cbd890479

    SHA512

    768007e06b0cd9e62d50f458b9435c6dda0a6d272f0b15550f97c478394b743331c3a9c9236e09ab5b9cb3b423b2320a5d66eb3c7068db9ea37891ca40e47012

    Download Submit

  • /data/data/nrv.yqmmemf.oh/no_backup/androidx.work.workdb-wal
    Filesize

    173KB

    MD5

    33ecd36c72e2aa7b5c083174a0225629

    SHA1

    71b2d3071ba911c46839712e2085b0f1d15eadb8

    SHA256

    58a01a84c8615867863e7135dff3bdf4da50ae06f51f28c40ef25c7aca44381e

    SHA512

    211bb6927acf7e87ef28fa6f327aaa04e251f4a1ab993058eb3325cad82cc981759f4d123cf0f8a553e010ad63fc10e033d7f69cb34903e94566999589ce73a9

    Download Submit

  • /data/data/nrv.yqmmemf.oh/no_backup/androidx.work.workdb-wal
    Filesize

    16KB

    MD5

    a086fd41117a51652f30b2198c781589

    SHA1

    146479ddd80fd9375fd8ae412ef84eb32b4c7801

    SHA256

    732cd03dd7a5eede8a9f6ba3192f4e12a4714519a51387175f7ff1fb24ddc97f

    SHA512

    f0fa747e90aa58eec3da434267c48442ef92e5b2cadb9af7f21cb30fbbf3a13ce3a8f072a6cf8c285487e23b291a2ec3d115120e13f7ba6e951e3bf5fc39ac68

    Download Submit

  • /data/data/nrv.yqmmemf.oh/no_backup/androidx.work.workdb-wal
    Filesize

    108KB

    MD5

    ba4481b57a77c667d44a5d8aae104e92

    SHA1

    6251ce5a5ed135863c6f5dc443f0307c72fb6b5e

    SHA256

    bbebbea4f468dd8b03c332a1e2d60f431dfac51d40521f51f01dc69da46c18d5

    SHA512

    a60b7f322fe6b77929c9ed6595f5eb95203227b4caecdda5b2506ba8696274f9328cb9282c251249736ababb1de4c52d65e7d704ee1b88a279c6e0e196898b91

    Download Submit

  • /data/user/0/nrv.yqmmemf.oh/app_apkprotector_dex/classes-v1.bin
    Filesize

    1.5MB

    MD5

    758fd177e85459423e1e58ff011d0f7f

    SHA1

    5e7a218f9124f8c2953ca6aa07ad89849654bb8a

    SHA256

    f2c52ede4aa12c2065909fa62d117a5d099455674013b7886b2b060693a91470

    SHA512

    d242a54f731dd28da1be7e3611db5c92d54f02aa87441dc875867de0ad2fce22595337973c04c58f05ca72a4fca1fed26f6597119089a064383f3441f682513e

    Download Submit