Malware Analysis Report

2025-01-19 05:43

Sample ID 210928-ss47gscdar
Target a283dfda4e6b1b1f7fcf3283047590eeb24df33a9f0f13584cfa17c26cfe1156.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.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

2021-09-28 15:24

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

2021-09-28 15:24

Reported

2021-09-28 15:26

Platform

android-x64

Max time kernel

755198s

Max time network

36s

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

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/data/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

Network

Country Destination Domain Proto
US 1.1.1.1:853 tcp
US 216.239.35.8:123 time.android.com udp

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

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 d2f00b96bc08415c508635730345c00f
SHA1 7834a377c8d0bcd2879fb7bf72a5d3cb5803fbde
SHA256 638e28d540d4d1ae5c44e04f19d8441e187125f4b3810a6b8c44de7e7b7e7cfa
SHA512 796e970e91fa626621ddb1eb16120387912163bfc3c6d5f583d6abf6084c1b725bdcdb5b53e594a647693664677d8eb4e392836516e509631bb174925e3e9715

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

MD5 1ac08cc83ce664c2853b11596675b3df
SHA1 45fd24aa0ea132a7b6685d2f6b958ee5bbd87467
SHA256 90c7a7f67bf3b9a27eada8e0fa3205ae27e2dc5ce3deaa7e0d7bb76a463750dc
SHA512 18bb00465bc09853726616c0c62e73c53126a387601d461669ea8ab83eda551b77261f348a40b0edf176601714802602981e34c862ce194ab6d475c3510f43b6