Malware Analysis Report

2025-01-19 05:43

Sample ID 211004-q2wwcsgeaq
Target a283dfda4e6b1b1f7fcf3283047590eeb24df33a9f0f13584cfa17c26cfe1156-flubot.apk
SHA256 a283dfda4e6b1b1f7fcf3283047590eeb24df33a9f0f13584cfa17c26cfe1156
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

a283dfda4e6b1b1f7fcf3283047590eeb24df33a9f0f13584cfa17c26cfe1156

Threat Level: Known bad

The file a283dfda4e6b1b1f7fcf3283047590eeb24df33a9f0f13584cfa17c26cfe1156-flubot.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

2021-10-04 13:45

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

2021-10-04 13:45

Reported

2021-10-04 13:48

Platform

android-x86-arm

Max time kernel

1267724s

Command Line

com.sina.weibo

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.sina.weibo/app_apkprotector_dex/aCRiESPM.vc N/A N/A
N/A /data/user/0/com.sina.weibo/app_apkprotector_dex/aCRiESPM.vc N/A N/A
N/A /data/user/0/com.sina.weibo/app_apkprotector_dex/aCRiESPM.vc 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.sina.weibo

com.sina.weibo

/system/bin/dex2oat

Network

N/A

Files

/data/user/0/com.sina.weibo/app_apkprotector_dex/aCRiESPM.vc

MD5 efd035acf5b1675c1ea8824a3de8247d
SHA1 3d89e8b36bf90064abb58a0885a969766c6d23ea
SHA256 e5f0ac7e193eaf19e37b4a3bb54786bd36fffd279e503d2cbeb901af6f98b4d7
SHA512 e06e9bd7ce1e258469bf4888d09f946f37636126c86c29341dc6bbaae41eebba0f7fd7cacd70d98bb51cfe2340d878af04dee41557f12c544cd68b59d43c66c4

/data/user/0/com.sina.weibo/app_apkprotector_dex/aCRiESPM.vc.x86.flock

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

/data/user/0/com.sina.weibo/app_apkprotector_dex/aCRiESPM.vc

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

/data/user/0/com.sina.weibo/app_apkprotector_dex/oat/x86/aCRiESPM.vdex

MD5 1faedcb344b82c4e914bd1878e119baf
SHA1 ead982bb21744103bfa29caccd1f29d90371836f
SHA256 6144b685dd0593ffe0bf83b72a3ed9a6bb004f74f1f3c001b870ccdc24f6cec7
SHA512 b2fc14e3ea441465850640a05230eec0157b9fcdda492c1e51e810e76e1b6b36ef086fe313914ed142df355b6fb052b1eceb92e8f159213ee358b878603bdfed

/data/user/0/com.sina.weibo/app_apkprotector_dex/oat/x86/aCRiESPM.odex

MD5 c944decb1cf732d3d9ef9cf45fed1d1f
SHA1 1932f395085ba542c386754da17f060963b5f131
SHA256 d95a6ba341580a5f6ac607322ff587fb0945f6b65d9250e35f8288ceadd3a912
SHA512 45dfb386a13a466c5269873e5899336f290b37575bb5ffae60238d6cbcaefb47bc18a39b410a86e5c183caf0767bb20023dbca95e02680feeb812e3b73d42aa4

/data/user/0/com.sina.weibo/app_apkprotector_dex/aCRiESPM.vc

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

/data/user/0/com.sina.weibo/app_apkprotector_dex/aCRiESPM.vc

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

/data/user/0/com.sina.weibo/shared_prefs/Voicemail.xml

MD5 9f59287914e2bedf97909586e6960c4e
SHA1 1e702adc82ec93c302968b4fcd96a6a4a2e29b91
SHA256 551bb4556f8fe15b88a0d09939c3847ec4cc951a13baa0a943cf13b1f4a9ae65
SHA512 c581a040caa326162260561f00b3aea355c3058d44312975f1673a76b4051b66e056ed7f54afd725e234fe9a5417f08f1771a8c226e269d4a140fd2edd39e46b