Malware Analysis Report

2025-01-19 05:42

Sample ID 210816-z168lj3bqj
Target 55f479f47852acadd57595f0a08628c13318842633a2a0b94d6bbe45f10d31ef.apk
SHA256 55f479f47852acadd57595f0a08628c13318842633a2a0b94d6bbe45f10d31ef
Tags
flubot banker infostealer 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

55f479f47852acadd57595f0a08628c13318842633a2a0b94d6bbe45f10d31ef

Threat Level: Known bad

The file 55f479f47852acadd57595f0a08628c13318842633a2a0b94d6bbe45f10d31ef.apk was found to be: Known bad.

Malicious Activity Summary

flubot banker infostealer ransomware trojan

FluBot

FluBot Payload

Requests dangerous framework permissions

Loads dropped Dex/Jar

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

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2021-08-16 07:20

Signatures

Requests dangerous framework permissions

Description Indicator Process Target
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
Allows an application to receive SMS messages. android.permission.RECEIVE_SMS N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2021-08-16 07:20

Reported

2021-08-16 07:21

Platform

android-x64-arm64

Max time kernel

1305905s

Max time network

69s

Command Line

com.baidu.searchbox

Signatures

FluBot

banker trojan infostealer flubot

FluBot Payload

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

Loads dropped Dex/Jar

Description Indicator Process Target
N/A /data/user/0/com.baidu.searchbox/app_apkprotector_dex/fAcKSnrN.kts N/A N/A
N/A /data/user/0/com.baidu.searchbox/app_apkprotector_dex/fAcKSnrN.kts N/A N/A
N/A /data/user/0/com.baidu.searchbox/app_apkprotector_dex/fAcKSnrN.kts 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

Processes

com.baidu.searchbox

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 142.250.187.196:443 udp
N/A 142.250.180.6:80 ad.doubleclick.net tcp
N/A 142.251.36.10:443 udp
N/A 172.217.169.78:443 udp
N/A 142.251.36.10:443 udp
N/A 172.217.17.40:443 tcp
N/A 1.1.1.1:853 tcp

Files

/data/user/0/com.baidu.searchbox/app_apkprotector_dex/fAcKSnrN.kts

MD5 1fac01f82a99c43da59b5e9435a7de21
SHA1 737570b2555702acca5285363f8e97b97a0983f8
SHA256 43c80662c0690414b9d56e4168666146160035c6c6d3c1949bebe56671ad5126
SHA512 e7e760d8a2f91d8c66c2dcc1613a852a5feed93c4c2ad1041d6fc219c2271f06b7a214fa237f0b9912924269288cc4d22a01854c2b03ecf9bb268bcf55bf5178

/data/user/0/com.baidu.searchbox/app_apkprotector_dex/fAcKSnrN.kts

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

/data/user/0/com.baidu.searchbox/app_apkprotector_dex/fAcKSnrN.kts

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

/data/user/0/com.baidu.searchbox/app_apkprotector_dex/fAcKSnrN.kts

MD5 0032c11fe7a5bd4307a78eda2f3c6d97
SHA1 3e2517f431b0a3ea915223d8fcdc37e9fea9f2ef
SHA256 e48c586efd1608dc7b17ec735fbdb293c2e81c3c50931d99ebe3fdcfdc6dfba6
SHA512 398d79d8cd7d3b271d32aae4331697ad8d6a8f4eb34d5cf83174be0cf0871e115ccaf26b0b5f3712801a7dfd9b5af220b604a4d2b609a7b2e2a314d2aa4333f7