Malware Analysis Report

2025-01-19 05:44

Sample ID 210831-5t4qn9rd9x
Target 25a5091406c412ecb379dc4b79ec7ff934e1ef260b3839e88f73eac430235301.apk
SHA256 25a5091406c412ecb379dc4b79ec7ff934e1ef260b3839e88f73eac430235301
Tags
flubot banker infostealer obfuscation ransomware trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

25a5091406c412ecb379dc4b79ec7ff934e1ef260b3839e88f73eac430235301

Threat Level: Known bad

The file 25a5091406c412ecb379dc4b79ec7ff934e1ef260b3839e88f73eac430235301.apk was found to be: Known bad.

Malicious Activity Summary

flubot banker infostealer obfuscation ransomware trojan

FluBot

FluBot Payload

Requests dangerous framework permissions

Loads dropped Dex/Jar

Uses Crypto APIs (Might try to encrypt user data).

Uses reflection

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2021-08-31 11:38

Signatures

Requests dangerous framework permissions

Description Indicator Process Target
Allows an application to receive SMS messages. android.permission.RECEIVE_SMS N/A N/A
Allows read only access to phone state, including the current cellular network information, the status of any ongoing calls, and a list of any PhoneAccounts registered on the device. android.permission.READ_PHONE_STATE N/A N/A
Allows an application to read the user's contacts data. android.permission.READ_CONTACTS N/A N/A
Allows an application to read SMS messages. android.permission.READ_SMS N/A N/A
Allows an application to send SMS messages. android.permission.SEND_SMS N/A N/A
Allows an application to initiate a phone call without going through the Dialer user interface for the user to confirm the call. android.permission.CALL_PHONE N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2021-08-31 11:38

Reported

2021-08-31 11:41

Platform

android-x64-arm64

Max time kernel

2617468s

Max time network

142s

Command Line

com.bilibili.app.in

Signatures

FluBot

banker trojan infostealer flubot

FluBot Payload

Description Indicator Process Target
N/A N/A N/A N/A

Loads dropped Dex/Jar

Description Indicator Process Target
N/A /data/user/0/com.bilibili.app.in/app_apkprotector_dex/n04hdBsA.av N/A N/A
N/A /data/user/0/com.bilibili.app.in/app_apkprotector_dex/n04hdBsA.av N/A N/A
N/A /data/user/0/com.bilibili.app.in/app_apkprotector_dex/n04hdBsA.av N/A N/A

Uses Crypto APIs (Might try to encrypt user data).

ransomware
Description Indicator Process Target
Framework API call javax.crypto.Cipher.doFinal N/A N/A

Uses reflection

obfuscation
Description Indicator Process Target
Invokes method android.view.ViewGroup.makeOptionalFitsSystemWindows N/A N/A N/A

Processes

com.bilibili.app.in

Network

Country Destination Domain Proto
N/A 224.0.0.251:5353 udp
N/A 1.1.1.1:853 tcp
N/A 1.1.1.1:853 tcp
N/A 142.251.32.102:80 ad.doubleclick.net tcp
N/A 172.217.16.234:80 play.googleapis.com tcp
N/A 142.250.80.78:443 udp
N/A 142.250.178.8:443 tcp
N/A 1.1.1.1:853 tcp
N/A 142.250.178.3:443 udp
N/A 1.1.1.1:853 tcp
N/A 216.239.35.12:123 time.android.com udp

Files

/data/user/0/com.bilibili.app.in/app_apkprotector_dex/n04hdBsA.av

MD5 c1733e82d2089999bad738185cbf9736
SHA1 0b19f5a252c8cd7f6d483428a305a95e5a190463
SHA256 b9b6020f6b6669981afe373f122249ea6eed34d256538f5f9697827411183ae5
SHA512 73a50ea90745daa78a77b1e3a928d82d3b1ab3d4d67b70e6684a562c937ee9f39c55258290dcbe12dd9f2647985b930841e34d6d32c360dd712221649be12acd

/data/user/0/com.bilibili.app.in/app_apkprotector_dex/n04hdBsA.av

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

/data/user/0/com.bilibili.app.in/app_apkprotector_dex/n04hdBsA.av

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

/data/user/0/com.bilibili.app.in/shared_prefs/Voicemail.xml

MD5 9e18a32521efff4182d42fef47744347
SHA1 98d931b64ca4782bdf0d13113934cd65d410a4d0
SHA256 a42ea614c650ff4418a11bae698564b4359047e196e2a76489cb3faec5c4e953
SHA512 8d0244deaeae425d263385c4e1557c6b210da4e84f2559efa4ba27ae9f81ca03a360fda71bdf1a28edd0b1479da1197af8b58760183a3b5ee0a7a5d695879c2e

/data/user/0/com.bilibili.app.in/app_apkprotector_dex/n04hdBsA.av

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e