flubot | 7474cbb1ad4f438e636cdd7eece595ac5fc29b6893f478ef1b86b4da4281138e

General

Target

7474cbb1ad4f438e636cdd7eece595ac5fc29b6893f478ef1b86b4da4281138e.apk
Size

3.5MB
MD5

8c788037c0044b96d63d4cde857d827e
SHA1

264fd077014e3c1ed843d12d7111de1e7586c1ee
SHA256

7474cbb1ad4f438e636cdd7eece595ac5fc29b6893f478ef1b86b4da4281138e
SHA512

902db8578682f058c6bd689fcac8ff5b5f4a97c39b4cea10bb7047a8c7699bd34c96a01fcf8b601419c42b50725e4a53560fb09db66b57361f6ca34abffa2b0a
SSDEEP

98304:hzWUKLGedqxHfjhdba/10L7XHi95l1JUUBbhAsKaNG3eD8T:tjKvqFjh5a6L7E/hcNT

Score

10^/10

flubot banker collection credential_access discovery evasion impact infostealer persistence trojan

Malware Config

Signatures

FluBot
FluBot is an android banking trojan that uses overlays.
banker trojan infostealer flubot

FluBot payload 2 IoCs

resource	yara_rule
behavioral1/files/fstream-5.dat	family_flubot
behavioral1/memory/4249-3.dex	family_flubot

Loads dropped Dex/Jar 1 TTPs 6 IoCs

Runs executable file dropped to the device during analysis.

evasion

Download New Code at Runtime

T1407

ioc	pid	Process
/data/user/0/com.dytake.downloader/app_apkprotector_dex/classes-v1.bin	4249	com.dytake.downloader
/data/user/0/com.dytake.downloader/app_apkprotector_dex/classes-v1.bin	4276	/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.dytake.downloader/app_apkprotector_dex/classes-v1.bin --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.dytake.downloader/app_apkprotector_dex/oat/x86/classes-v1.odex --compiler-filter=quicken --class-loader-context=&
/data/user/0/com.dytake.downloader/app_apkprotector_dex/classes-v1.bin	4249	com.dytake.downloader
/data/user/0/com.dytake.downloader/app_ded/TIVfnu5Bz8okHdzcW64PCAkVUHSV3EaW.dex	4249	com.dytake.downloader
/data/user/0/com.dytake.downloader/app_ded/TIVfnu5Bz8okHdzcW64PCAkVUHSV3EaW.dex	4303	/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.dytake.downloader/app_ded/TIVfnu5Bz8okHdzcW64PCAkVUHSV3EaW.dex --output-vdex-fd=42 --oat-fd=44 --oat-location=/data/user/0/com.dytake.downloader/app_ded/oat/x86/TIVfnu5Bz8okHdzcW64PCAkVUHSV3EaW.odex --compiler-filter=quicken --class-loader-context=&
/data/user/0/com.dytake.downloader/app_ded/TIVfnu5Bz8okHdzcW64PCAkVUHSV3EaW.dex	4249	com.dytake.downloader

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.dytake.downloader
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId	com.dytake.downloader
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText	com.dytake.downloader

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.dytake.downloader

Performs UI accessibility actions on behalf of the user 1 TTPs 2 IoCs

Application may abuse the accessibility service to prevent their removal.

evasion

Prevent Application Removal

T1629.001

ioc	Process
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.dytake.downloader
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.dytake.downloader

Queries information about active data network 1 TTPs 1 IoCs

discovery

System Network Connections Discovery

T1421

description	ioc	Process
Framework service call	android.net.IConnectivityManager.getActiveNetworkInfo	com.dytake.downloader

Requests changing the default SMS application. 2 TTPs 1 IoCs

collection impact

SMS Messages

T1636.004

SMS Control

T1582

description	ioc	Process
Intent action	android.provider.Telephony.ACTION_CHANGE_DEFAULT	com.dytake.downloader

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.dytake.downloader

Requests enabling of the accessibility settings. 1 IoCs

description	ioc	Process
Intent action	android.settings.ACCESSIBILITY_SETTINGS	com.dytake.downloader

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.dytake.downloader

com.dytake.downloader
1⤵
- Loads dropped Dex/Jar
- Makes use of the framework's Accessibility service
- Makes use of the framework's foreground persistence service
- Performs UI accessibility actions on behalf of the user
- Queries information about active data network
- Requests changing the default SMS application.
- Requests disabling of battery optimizations (often used to enable hiding in the background).
- Requests enabling of the accessibility settings.
- Uses Crypto APIs (Might try to encrypt user data)
PID:4249
- /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.dytake.downloader/app_apkprotector_dex/classes-v1.bin --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.dytake.downloader/app_apkprotector_dex/oat/x86/classes-v1.odex --compiler-filter=quicken --class-loader-context=&
  2⤵
  - Loads dropped Dex/Jar
  PID:4276
- /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.dytake.downloader/app_ded/TIVfnu5Bz8okHdzcW64PCAkVUHSV3EaW.dex --output-vdex-fd=42 --oat-fd=44 --oat-location=/data/user/0/com.dytake.downloader/app_ded/oat/x86/TIVfnu5Bz8okHdzcW64PCAkVUHSV3EaW.odex --compiler-filter=quicken --class-loader-context=&
  2⤵
  - Loads dropped Dex/Jar
  PID:4303

Network

MITRE ATT&CK Mobile v15

Initial Access

Execution

Persistence

Foreground Persistence

1

T1541

Privilege Escalation

Defense Evasion

Download New Code at Runtime

1

T1407

Foreground Persistence

1

T1541

Hide Artifacts

1

T1628

User Evasion

1

T1628.002

Impair Defenses

1

T1629

Prevent Application Removal

Input Injection

Credential Access

Input Capture

2

T1417

GUI Input Capture

1

T1417.002

Keylogging

1

T1417.001

Discovery

System Network Connections Discovery

1

T1421

Lateral Movement

Collection

Input Capture

2

T1417

GUI Input Capture

1

T1417.002

Keylogging

1

T1417.001

Protected User Data

1

T1636

SMS Messages

Screen Capture

Command and Control

Exfiltration

Impact

Data Encrypted for Impact

Input Injection

SMS Control

Replay Monitor

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Downloads

/data/data/com.dytake.downloader/app_apkprotector_dex/classes-v1.bin

Filesize
120KB

MD5
c384c5cdaf8f3edfa29389f2de2effea

SHA1
5e5dad9692cf5794e3ff7b99a64e6555399bc56f

SHA256
0f145035801825a43c9aba19597cb6ee6737088c4f058a66d6b87f144a046062

SHA512
7ea82780f2a46f8c297a35c16bb2e51136d4297fd2c4e6409b595b97d9490dfd65d00352a07ca6cd86b4f2fbfceeb5ab8d15f515395104be61629af56046c780

Download Submit
/data/data/com.dytake.downloader/app_ded/TIVfnu5Bz8okHdzcW64PCAkVUHSV3EaW.dex

Filesize
2.2MB

MD5
8bad77a96467be614a75af30e637025b

SHA1
cb30f4f45f9d7f6a72e023206c1cc1504cc81538

SHA256
9d5d4f3a94a78f93cb3e418d89226cfc6088d31da44193f7665dbd1f266a645a

SHA512
4d3e44302d758f49e3c6377834af48d8c667626a6ac98908fb9005fa9a64cbe083358d0be1a80e0766fceb950c38fe76b25b0bfb09b33d8e5d9ff7fe66bb4a6b

Download Submit
/data/user/0/com.dytake.downloader/app_apkprotector_dex/classes-v1.bin

Filesize
120KB

MD5
5e0ca1f47d3a8db8a8124c2cc1764665

SHA1
4b12e946982d6734639b598e1c07de978742d57d

SHA256
82bda6c0b3a3a18143df2b9719f11a455bee95300adb6eec16ec3c0cb210edf9

SHA512
447bcbf794f066e711e7d3f517c04d15ec705e4e1e271d82428abb467c888fb3ee5dc235192087f2df7f57baea974a2feb862671f4eb81605468962ace39712b

Download Submit
/data/user/0/com.dytake.downloader/app_ded/TIVfnu5Bz8okHdzcW64PCAkVUHSV3EaW.dex

Filesize
2.2MB

MD5
e135822f295717233e7aaf2688276e89

SHA1
821b73e7f907430eddb4f0758dc0ae5d69abeaef

SHA256
e7d68b6b629f7ab5a94802ac15a74566f1c2dbb43bc0c1f19d8ae95a8ce9cd95

SHA512
a770fafad0cf3571c56c75e976f6bb30cb07e44ec48d40b3d2288cb82c5b07794b7fd349078b990645f647afb51824bbbdd7d971ad93932f0da162afa53ba911

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Mobile v15

Replay Monitor

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Downloads