octo | 450b4234a55369eb0302994fcd0f36f86305de769f7439d1cfec587cc319073a | Triage

Analysis

max time kernel
144s
max time network
152s
platform
android_x86
resource
android-x86-arm-20240624-en
resource tags

androidarch:armarch:x86image:android-x86-arm-20240624-enlocale:en-usos:android-9-x86system
submitted
11-11-2024 22:05

Sharing

Report Analysis Logs

General

Target

450b4234a55369eb0302994fcd0f36f86305de769f7439d1cfec587cc319073a.apk
Size

2.4MB
MD5

81ed6ef6862470330b8db7a78c8c5cb5
SHA1

be9738d05c206cbdae8bdf91402b530f2c49f633
SHA256

450b4234a55369eb0302994fcd0f36f86305de769f7439d1cfec587cc319073a
SHA512

0c89b90c8a3dfba56c6e2afc3df8c2f7225ab5d035d0ac913d729d415850ae15fd0e3f5ca94c30f6230396e8a3c1e6b9e6cbfdfd03da5f692b88925bee597434
SSDEEP

49152:3EmsBSiaph1+FrkgndRJQDDN9ZNW85MNmhIRefVSAsz048PkkoA4oICRBPxya9AN:X5iaX4rkwsDLZNW85M+fVSAsz048PpDw

Score

10^/10

octo banker collection credential_access discovery evasion impact infostealer persistence rat stealth trojan

Malware Config

Extracted

Family

octo

C2

https://7bb13903074567453981d0595033c23.com/YmZiMzU0OTU5NGIz/

https://4b6413903074567453981d0595033c23.com/YmZiMzU0OTU5NGIz/

https://34b6413903074567453981d0595033c23.com/YmZiMzU0OTU5NGIz/

https://64b6413903074567453981d0595033c23.com/YmZiMzU0OTU5NGIz/

https://74b6413903074567453981d0595033c23.com/YmZiMzU0OTU5NGIz/

https://894b6413903074567453981d0595033c23.com/YmZiMzU0OTU5NGIz/

https://94b64139030754567453981d0595033c23.com/YmZiMzU0OTU5NGIz/

https://94b64139033074567453981d0595033c23.com/YmZiMzU0OTU5NGIz/

https://94b641553903074567453981d0595033c23.com/YmZiMzU0OTU5NGIz/

rc4.plain

Extracted

Family

octo

C2

https://7bb13903074567453981d0595033c23.com/YmZiMzU0OTU5NGIz/

https://4b6413903074567453981d0595033c23.com/YmZiMzU0OTU5NGIz/

https://34b6413903074567453981d0595033c23.com/YmZiMzU0OTU5NGIz/

https://64b6413903074567453981d0595033c23.com/YmZiMzU0OTU5NGIz/

https://74b6413903074567453981d0595033c23.com/YmZiMzU0OTU5NGIz/

https://894b6413903074567453981d0595033c23.com/YmZiMzU0OTU5NGIz/

https://94b64139030754567453981d0595033c23.com/YmZiMzU0OTU5NGIz/

https://94b64139033074567453981d0595033c23.com/YmZiMzU0OTU5NGIz/

https://94b641553903074567453981d0595033c23.com/YmZiMzU0OTU5NGIz/

AES_key

Signatures

Octo
Octo is a banking malware with remote access capabilities first seen in April 2022.
banker trojan infostealer rat octo
Octo family
octo

Octo payload 1 IoCs

resource	yara_rule
behavioral1/files/fstream-1.dat	family_octo

Removes its main activity from the application launcher 1 TTPs 1 IoCs

stealth trojan evasion

Suppress Application Icon

pid	Process
4250	com.freefall91

Loads dropped Dex/Jar 1 TTPs 2 IoCs

Runs executable file dropped to the device during analysis.

Download New Code at Runtime

ioc	pid	Process
/data/user/0/com.freefall91/cache/bnsmkvyw	4250	com.freefall91
/data/user/0/com.freefall91/cache/bnsmkvyw	4250	com.freefall91

Makes use of the framework's Accessibility service 4 TTPs 2 IoCs

Retrieves information displayed on the phone screen using AccessibilityService.

collection evasion credential_access

Input Injection

Screen Capture

Keylogging

GUI Input Capture

description	ioc	Process
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfoByAccessibilityId	com.freefall91
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId	com.freefall91

Queries a list of all the installed applications on the device (Might be used in an attempt to overlay legitimate apps) 1 TTPs
banker discovery

Security Software Discovery
T1418.001
Queries the phone number (MSISDN for GSM devices) 1 TTPs
discovery

System Network Configuration Discovery
T1422

Acquires the wake lock 1 IoCs

description	ioc	Process
Framework service call	android.os.IPowerManager.acquireWakeLock	com.freefall91

Makes use of the framework's foreground persistence service 1 TTPs 1 IoCs

Application may abuse the framework's foreground service to continue running in the foreground.

evasion persistence

Foreground Persistence

description	ioc	Process
Framework service call	android.app.IActivityManager.setServiceForeground	com.freefall91

Performs UI accessibility actions on behalf of the user 1 TTPs 4 IoCs

Application may abuse the accessibility service to prevent their removal.

Prevent Application Removal

ioc	Process
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.freefall91
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.freefall91
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.freefall91
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.freefall91

Queries the mobile country code (MCC) 1 TTPs 1 IoCs

System Network Configuration Discovery

description	ioc	Process
Framework service call	com.android.internal.telephony.ITelephony.getNetworkCountryIsoForPhone	com.freefall91

Queries the unique device ID (IMEI, MEID, IMSI) 1 TTPs
discovery

System Network Configuration Discovery
T1422
Reads information about phone network operator. 1 TTPs
discovery

System Network Configuration Discovery
T1422

Requests accessing notifications (often used to intercept notifications before users become aware). 1 TTPs 1 IoCs

collection credential_access

Access Notifications

description	ioc	Process
Intent action	android.settings.ACTION_NOTIFICATION_LISTENER_SETTINGS	com.freefall91

Requests disabling of battery optimizations (often used to enable hiding in the background). 1 TTPs 1 IoCs

User Evasion

description	ioc	Process
Intent action	android.settings.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS	com.freefall91

Requests modifying system settings. 1 IoCs

description	ioc	Process
Intent action	android.settings.action.MANAGE_WRITE_SETTINGS	com.freefall91

Registers a broadcast receiver at runtime (usually for listening for system events) 1 TTPs 1 IoCs

Broadcast Receivers

description	ioc	Process
Framework service call	android.app.IActivityManager.registerReceiver	com.freefall91

Uses Crypto APIs (Might try to encrypt user data) 1 TTPs 1 IoCs

Data Encrypted for Impact

description	ioc	Process
Framework API call	javax.crypto.Cipher.doFinal	com.freefall91

com.freefall91
1⤵
- Removes its main activity from the application launcher
- Loads dropped Dex/Jar
- Makes use of the framework's Accessibility service
- Acquires the wake lock
- Makes use of the framework's foreground persistence service
- Performs UI accessibility actions on behalf of the user
- Queries the mobile country code (MCC)
- Requests accessing notifications (often used to intercept notifications before users become aware).
- Requests disabling of battery optimizations (often used to enable hiding in the background).
- Requests modifying system settings.
- Registers a broadcast receiver at runtime (usually for listening for system events)
- Uses Crypto APIs (Might try to encrypt user data)
PID:4250

Network

MITRE ATT&CK Mobile v15

Initial Access

Execution

Persistence

Event Triggered Execution

Broadcast Receivers

Foreground Persistence

Privilege Escalation

Defense Evasion

Download New Code at Runtime

Foreground Persistence

Hide Artifacts

Suppress Application Icon

User Evasion

Impair Defenses

Prevent Application Removal

Input Injection

Credential Access

Access Notifications

Input Capture

GUI Input Capture

Keylogging

Discovery

Software Discovery

Security Software Discovery

System Network Configuration Discovery

Lateral Movement

Collection

Access Notifications

Input Capture

GUI Input Capture

Keylogging

Screen Capture

Command and Control

Exfiltration

Impact

Data Encrypted for Impact

Input Injection

Replay Monitor

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Downloads

/data/data/com.freefall91/cache/bnsmkvyw

Filesize
2.3MB

MD5
45b03b3e0441d3581c5777060c8acaba

SHA1
bb8fa871fedb350e81ef58b3255831ebc0e35e06

SHA256
30cfaa93fc908f0090f39f2743514c1b2510e7c078b334a75187a58dc3f8578f

SHA512
ae3e69ba0c0febf07e6ecc846aea583b0c2bab35f8688cbf8a800d8cf29a569267329124fe017521bab8b5876fe352d93940923b6727b885cbee9344f544dcbb

Download Submit
/data/data/com.freefall91/cache/oat/bnsmkvyw.cur.prof

Filesize
546B

MD5
25997846f8bfe2d9452390e037321d2d

SHA1
fab367a0a6388e77bbf075aa495f3320ca6683b7

SHA256
b2046ccdd9ab14b42a72ba07aa7ef3f06dec692581e39c39af0958b730cacf6f

SHA512
18c65862089c6fd5d826d9e8b72a7686c0f76a98252ceb46bb3b8641fdecc9646b5c2266b7adc4fd71c38cefe8c1f3c88ea3984c2cba0d214c769a7a1ba85865

Download Submit