Malware Analysis Report

2025-01-19 05:42

Sample ID 210817-k58zpsx94x
Target c9254f055d63b3dfd1ca483d8e671a13c7b53453f7eacf8f2b135964e862442c.apk
SHA256 c9254f055d63b3dfd1ca483d8e671a13c7b53453f7eacf8f2b135964e862442c
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

c9254f055d63b3dfd1ca483d8e671a13c7b53453f7eacf8f2b135964e862442c

Threat Level: Known bad

The file c9254f055d63b3dfd1ca483d8e671a13c7b53453f7eacf8f2b135964e862442c.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

2021-08-17 08:10

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 receive SMS messages. android.permission.RECEIVE_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 read SMS messages. android.permission.READ_SMS 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 send SMS messages. android.permission.SEND_SMS N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2021-08-17 08:10

Reported

2021-08-17 08:11

Platform

android-x64-arm64

Max time kernel

1395306s

Max time network

95s

Command Line

kiunb.trvh4j.refyyhv

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/kiunb.trvh4j.refyyhv/app_apkprotector_dex/classes-v1.bin N/A N/A
N/A /data/user/0/kiunb.trvh4j.refyyhv/app_apkprotector_dex/classes-v1.bin N/A N/A
N/A /data/user/0/kiunb.trvh4j.refyyhv/app_ded/B3xwDWwUJigASlUensdiO2l66ca1HPk8.dex N/A N/A
N/A /data/user/0/kiunb.trvh4j.refyyhv/app_ded/B3xwDWwUJigASlUensdiO2l66ca1HPk8.dex 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
Acesses field android.os.Build.BOARD N/A N/A N/A
Acesses field android.os.Build.BOARD N/A N/A N/A
Acesses field android.os.Build.BOOTLOADER N/A N/A N/A
Acesses field android.os.Build.BOOTLOADER N/A N/A N/A
Acesses field android.os.Build.BRAND N/A N/A N/A
Acesses field android.os.Build.BRAND N/A N/A N/A
Acesses field android.os.Build.CPU_ABI N/A N/A N/A
Acesses field android.os.Build.CPU_ABI N/A N/A N/A
Acesses field android.os.Build.CPU_ABI2 N/A N/A N/A
Acesses field android.os.Build.CPU_ABI2 N/A N/A N/A
Acesses field android.os.Build.DEVICE N/A N/A N/A
Acesses field android.os.Build.DEVICE N/A N/A N/A
Acesses field android.os.Build.DISPLAY N/A N/A N/A
Acesses field android.os.Build.DISPLAY N/A N/A N/A
Acesses field android.os.Build.FINGERPRINT N/A N/A N/A
Acesses field android.os.Build.FINGERPRINT N/A N/A N/A
Acesses field android.os.Build.HARDWARE N/A N/A N/A
Acesses field android.os.Build.HARDWARE N/A N/A N/A
Acesses field android.os.Build.HOST N/A N/A N/A
Acesses field android.os.Build.HOST N/A N/A N/A
Acesses field android.os.Build.ID N/A N/A N/A
Acesses field android.os.Build.ID N/A N/A N/A
Acesses field android.os.Build.IS_DEBUGGABLE N/A N/A N/A
Acesses field android.os.Build.IS_DEBUGGABLE N/A N/A N/A
Acesses field android.os.Build.IS_EMULATOR N/A N/A N/A
Acesses field android.os.Build.IS_EMULATOR N/A N/A N/A
Acesses field android.os.Build.MANUFACTURER N/A N/A N/A
Acesses field android.os.Build.MANUFACTURER N/A N/A N/A
Acesses field android.os.Build.MODEL N/A N/A N/A
Acesses field android.os.Build.MODEL N/A N/A N/A
Acesses field android.os.Build.PERMISSIONS_REVIEW_REQUIRED N/A N/A N/A
Acesses field android.os.Build.PERMISSIONS_REVIEW_REQUIRED N/A N/A N/A
Acesses field android.os.Build.PRODUCT N/A N/A N/A
Acesses field android.os.Build.PRODUCT N/A N/A N/A
Acesses field android.os.Build.RADIO N/A N/A N/A
Acesses field android.os.Build.RADIO N/A N/A N/A
Acesses field android.os.Build.SERIAL N/A N/A N/A
Acesses field android.os.Build.SERIAL N/A N/A N/A
Acesses field android.os.Build.SUPPORTED_32_BIT_ABIS N/A N/A N/A
Acesses field android.os.Build.SUPPORTED_32_BIT_ABIS N/A N/A N/A
Acesses field android.os.Build.SUPPORTED_64_BIT_ABIS N/A N/A N/A
Acesses field android.os.Build.SUPPORTED_64_BIT_ABIS N/A N/A N/A
Acesses field android.os.Build.SUPPORTED_ABIS N/A N/A N/A
Acesses field android.os.Build.SUPPORTED_ABIS N/A N/A N/A
Acesses field android.os.Build.TAGS N/A N/A N/A
Acesses field android.os.Build.TAGS N/A N/A N/A
Acesses field android.os.Build.TIME N/A N/A N/A
Acesses field android.os.Build.TIME N/A N/A N/A
Acesses field android.os.Build.TYPE N/A N/A N/A
Acesses field android.os.Build.TYPE N/A N/A N/A
Acesses field android.os.Build.UNKNOWN N/A N/A N/A
Acesses field android.os.Build.UNKNOWN N/A N/A N/A
Acesses field android.os.Build.USER N/A N/A N/A
Acesses field android.os.Build.USER N/A N/A N/A

Processes

kiunb.trvh4j.refyyhv

Network

Country Destination Domain Proto
N/A 1.1.1.1:853 tcp
N/A 224.0.0.251:5353 udp
N/A 1.1.1.1:853 tcp
N/A 142.250.187.230:80 ad.doubleclick.net tcp
N/A 142.250.200.4:443 udp
N/A 142.250.178.10:80 play.googleapis.com tcp
N/A 172.217.169.10:443 udp
N/A 172.217.169.10:443 udp
N/A 172.217.169.78:443 udp
N/A 172.217.16.232:443 tcp
N/A 1.1.1.1:853 tcp
N/A 216.239.35.8:123 time.android.com udp
N/A 1.1.1.1:853 tcp
N/A 1.1.1.1:853 tcp

Files

/data/user/0/kiunb.trvh4j.refyyhv/app_apkprotector_dex/classes-v1.bin

MD5 c384c5cdaf8f3edfa29389f2de2effea
SHA1 5e5dad9692cf5794e3ff7b99a64e6555399bc56f
SHA256 0f145035801825a43c9aba19597cb6ee6737088c4f058a66d6b87f144a046062
SHA512 7ea82780f2a46f8c297a35c16bb2e51136d4297fd2c4e6409b595b97d9490dfd65d00352a07ca6cd86b4f2fbfceeb5ab8d15f515395104be61629af56046c780

/data/user/0/kiunb.trvh4j.refyyhv/app_apkprotector_dex/classes-v1.bin

MD5 c384c5cdaf8f3edfa29389f2de2effea
SHA1 5e5dad9692cf5794e3ff7b99a64e6555399bc56f
SHA256 0f145035801825a43c9aba19597cb6ee6737088c4f058a66d6b87f144a046062
SHA512 7ea82780f2a46f8c297a35c16bb2e51136d4297fd2c4e6409b595b97d9490dfd65d00352a07ca6cd86b4f2fbfceeb5ab8d15f515395104be61629af56046c780

/data/user/0/kiunb.trvh4j.refyyhv/app_apkprotector_dex/classes-v1.bin

MD5 c384c5cdaf8f3edfa29389f2de2effea
SHA1 5e5dad9692cf5794e3ff7b99a64e6555399bc56f
SHA256 0f145035801825a43c9aba19597cb6ee6737088c4f058a66d6b87f144a046062
SHA512 7ea82780f2a46f8c297a35c16bb2e51136d4297fd2c4e6409b595b97d9490dfd65d00352a07ca6cd86b4f2fbfceeb5ab8d15f515395104be61629af56046c780

/data/user/0/kiunb.trvh4j.refyyhv/app_ded/B3xwDWwUJigASlUensdiO2l66ca1HPk8.dex

MD5 ce2eb8049c1923184bef0fa1b0bccf18
SHA1 73fbf4bd370c0b0e716c70dde6384f989f36fecb
SHA256 6f000d1cbf06afe380dc8c952c26831af18289d0a7fd91d9f8c64325edbce743
SHA512 f64350b1e6c4f7508c0804d911f5ce13883dbd20421ed71d57a1a954e6d6476e398d97317e437b7a82dbe1ca297d9e617f6ab0474111bceb12601aa5ff18d161

/data/user/0/kiunb.trvh4j.refyyhv/app_ded/B3xwDWwUJigASlUensdiO2l66ca1HPk8.dex

MD5 ce2eb8049c1923184bef0fa1b0bccf18
SHA1 73fbf4bd370c0b0e716c70dde6384f989f36fecb
SHA256 6f000d1cbf06afe380dc8c952c26831af18289d0a7fd91d9f8c64325edbce743
SHA512 f64350b1e6c4f7508c0804d911f5ce13883dbd20421ed71d57a1a954e6d6476e398d97317e437b7a82dbe1ca297d9e617f6ab0474111bceb12601aa5ff18d161

/data/user/0/kiunb.trvh4j.refyyhv/app_ded/B3xwDWwUJigASlUensdiO2l66ca1HPk8.dex

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e