octo | 7e792ff22711078c41f2623730a69ad6818b87764f712c7841984794604069a7

Analysis

max time kernel
149s
max time network
156s
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
01/12/2024, 22:25

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General

Target
base.apk
Size 7.9MB
Sample241201-2b96vavlex
SHA256 7de51c2775e3de444c5a12fcc1b92ba178e3205041c132fc4c47792252092a51
MD5 9b4bff2a39ecf16e27b0a072f48384ee
SHA1 05ba498022cc77aa32cff8dcd5cc85b002ceedca
SHA512 06ba420cf8779e11f72d57c774efe7f74012c4c1583946ae91fb16e8b21c3fd474d7ad073bf3ec7bb14534843ac4c81041bd3e74e8f3506b74e0c0e4fa0dc3af
SSDEEP 98304:ECJIYdaOT0eY5iSRGd839J5FrRswXizj7qVKiQj1Qe35/Qcmc3:j7Ir5r5FrRZ2j7qUVjv/Q+3
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

octo banker collection credential_access discovery evasion impact infostealer persistence rat trojan

Malware Config

Extracted

Family

octo

https://156350786312d7feba2b1c9b7577097b.com

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
behavioral4/memory/4255-1.dex	family_octo

Loads dropped Dex/Jar 1 TTPs 3 IoCs

Runs executable file dropped to the device during analysis.

evasion

Download New Code at Runtime

T1407

ioc	pid	Process
/data/user/0/com.ckservice74_access/app_village/erLYgyN.json	4255	com.ckservice74_access
/data/user/0/com.ckservice74_access/app_village/erLYgyN.json	4281	/system/bin/dex2oat --instruction-set=x86 --instruction-set-features=ssse3,-sse4.1,-sse4.2,-avx,-avx2,-popcnt --runtime-arg -Xhidden-api-checks --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --instruction-set-variant=x86 --instruction-set-features=default --inline-max-code-units=0 --compact-dex-level=none --dex-file=/data/user/0/com.ckservice74_access/app_village/erLYgyN.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.ckservice74_access/app_village/oat/x86/erLYgyN.odex --compiler-filter=quicken --class-loader-context=&
Anonymous-DexFile@0xd2711000-0xd27947fc	4255	com.ckservice74_access

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

T1516

Screen Capture

T1513

Keylogging

T1417.001

GUI Input Capture

T1417.002

description	ioc	Process
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfoByAccessibilityId	com.ckservice74_access
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId	com.ckservice74_access

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.ckservice74_access

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

T1541

description	ioc	Process
Framework service call	android.app.IActivityManager.setServiceForeground	com.ckservice74_access

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

discovery

System Network Configuration Discovery

T1422

description	ioc	Process
Framework service call	com.android.internal.telephony.ITelephony.getNetworkCountryIsoForPhone	com.ckservice74_access

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

evasion

User Evasion

T1628.002

description	ioc	Process
Intent action	android.settings.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS	com.ckservice74_access

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

persistence

Broadcast Receivers

T1624.001

description	ioc	Process
Framework service call	android.app.IActivityManager.registerReceiver	com.ckservice74_access

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

impact

Data Encrypted for Impact

T1471

description	ioc	Process
Framework API call	javax.crypto.Cipher.doFinal	com.ckservice74_access

Checks CPU information 2 TTPs 1 IoCs

System Checks

T1633.001

System Information Discovery

T1426

description	ioc	Process
File opened for read	/proc/cpuinfo	com.ckservice74_access

Checks memory information 2 TTPs 1 IoCs

System Checks

T1633.001

System Information Discovery

T1426

description	ioc	Process
File opened for read	/proc/meminfo	com.ckservice74_access

com.ckservice74_access
1⤵
- 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
- Queries the mobile country code (MCC)
- Requests disabling of battery optimizations (often used to enable hiding in the background).
- Registers a broadcast receiver at runtime (usually for listening for system events)
- Uses Crypto APIs (Might try to encrypt user data)
- Checks CPU information
- Checks memory information
PID:4255
- /system/bin/dex2oat --instruction-set=x86 --instruction-set-features=ssse3,-sse4.1,-sse4.2,-avx,-avx2,-popcnt --runtime-arg -Xhidden-api-checks --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --instruction-set-variant=x86 --instruction-set-features=default --inline-max-code-units=0 --compact-dex-level=none --dex-file=/data/user/0/com.ckservice74_access/app_village/erLYgyN.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.ckservice74_access/app_village/oat/x86/erLYgyN.odex --compiler-filter=quicken --class-loader-context=&
  2⤵
  - Loads dropped Dex/Jar
  PID:4281

Network

MITRE ATT&CK Mobile v15

Initial Access

Execution

Persistence

Event Triggered Execution

T1624

Broadcast Receivers

T1624.001

Foreground Persistence

T1541

Privilege Escalation

Defense Evasion

Download New Code at Runtime

T1407

Foreground Persistence

T1541

Hide Artifacts

T1628

User Evasion

T1628.002

Input Injection

T1516

Virtualization/Sandbox Evasion

T1633

System Checks

T1633.001

Credential Access

Input Capture

T1417

GUI Input Capture

T1417.002

Keylogging

T1417.001

Discovery

Software Discovery

T1418

Security Software Discovery

T1418.001

System Information Discovery

T1426

System Network Configuration Discovery

T1422

Lateral Movement

Collection

Input Capture

T1417

GUI Input Capture

T1417.002

Keylogging

T1417.001

Screen Capture

T1513

Command and Control

Exfiltration

Impact

Data Encrypted for Impact

T1471

Input Injection

T1516

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Downloads

.global.com.ckservice74_access

Path /data/data/com.ckservice74_access/.global.com.ckservice74_access
Size 48B
SHA256 b66c1320cb063a1d391c94273572ea6edae76c8c8b0a07f8d75c88686f0df72a
MD5 046a414913add6f5bb60072c7db819b6
SHA1 451ee4f6809260aec622d772fd329c7d0297a842
SHA512 4e6355f3051ed5e811ab030abde1f5be7f5e1cf33be99cd08477e9b6c015deb1d8bd75a09fb9c7176b8511c5ad0a67abc0902a3531e97564ccb6afc57496a47c
MD5 SHA1 SHA512

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erLYgyN.json

Path /data/data/com.ckservice74_access/app_village/erLYgyN.json
Size 1016B
SHA256 253a6a55480343d24230113512b99d7c6321a11c1d2043d4a06a7b69b841bd6b
MD5 b9f2667d60e0ff924be4d7a8c00f38ae
SHA1 54efeebc7f3e87bbb7d94da31aef9cf58f397045
SHA512 5dd89323edd89c051259fa42a8a277fab78683a5a87456b2e9881f2fdcc165ffddb5fdcf0b3e1a6c46f55d2cd6893d926ea5dc5dd4793053b4333bf5a98ab80a
MD5 SHA1 SHA512

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erLYgyN.json

Path /data/data/com.ckservice74_access/app_village/erLYgyN.json
Size 1016B
SHA256 e33ff6b08c970b6f85e3c0e764195e8e68f6f5fa81de6f72c02a8e1c2b376389
MD5 7f8db5e827c319f55b2692240fc2a920
SHA1 a0bbd3c0b5223801e96bc88f74a191a16c53882f
SHA512 bc71d1ff3d795a9f27223bca51393b8564c67162af5b0449ad6a48c22856faa88ad8806eeba96d7eb1b4f892ce629345cf4ea3cf49322cc86b5564b932d84fd9
MD5 SHA1 SHA512

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Path /data/data/com.ckservice74_access/files/.p
Size 307KB
SHA256 6db94232e756b90ed437f1bc87dc38cf20fb2e7c7a19a5e40c6c17254b7e234c
MD5 4e73947cabb5db3f92ca85004981b754
SHA1 6d9667fdb0280ed2dcb782b4683e422a51bdc601
SHA512 be8b500a7070af1dfb53b0cf1a7b327dadc4e163a6dad905496ac228c58cd1ed87b054533917924455d35e9b300683ae33e1bcdd91935a5dbae1d693c3e13d69
SSDEEP 6144:VnVaOYui6APlh0bOTgoCD0i09L/D64OGNTWEKnh7DMVFQqbsfgLsJhpq8X+JwFsU:TbdamOQd6c+ULLqhysDqUgWw50A+C
MD5 SHA1 SHA512 SSDEEP

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erLYgyN.json

Path /data/user/0/com.ckservice74_access/app_village/erLYgyN.json
Size 1KB
SHA256 bdf1204942b9e98595c8182ca1f6562ba2383f73f518b49ad4ecca09fd7d1fad
MD5 7755d273042ceed8904cdce5e1dd187a
SHA1 152b254f3dfd018b7981e4f98ab6c51a302d13ed
SHA512 f6403bddfe131f9873a82706c7886f4eec220db999b7c4655fb1f3aaded1027053db0ba15387d39888c2cb8da52a8102d7ac0131a41c855418ae5b56ae4c0383
MD5 SHA1 SHA512

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erLYgyN.json

Path /data/user/0/com.ckservice74_access/app_village/erLYgyN.json
Size 1KB
SHA256 125862702261cbcbcdfdb65acdffb9b1deab83e7592dded13f8aa49150218689
MD5 1f4c4d517b3b589cd240752e494f4298
SHA1 c5726c9cbd7095d77824f16ffaf52fd3df074627
SHA512 ee97e6263b377c07588359cc5b6b47827cafdac19f05cc3b587158ca2dd8470b7ca7c11fdc73e54e76a351e88400981f1b4b09bf2f8346d89bec5d1d23d4d357
MD5 SHA1 SHA512

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Anonymous-DexFile@0xd2711000-0xd27947fc

Path Anonymous-DexFile@0xd2711000-0xd27947fc
Size 525KB
SHA256 9e1c828daee14326d29814bee4ff6ac0f8c356137239245590f415eba536f7e4
MD5 84ec3d750815bdd25a99df5c8af0549f
SHA1 bbed13cece979438f26695ae55b74321a91b653f
SHA512 0f1f4f0fb054d13e394811738740623fbcda78a3dff6d772a42533f2d6367087c2acbbb0b5dc6d3004eaf8f26b38f858d57a3475ed3a373ae30f6168fd62eba9
SSDEEP 6144:78lBz3mZ98AnFpnSBLSjz9NqoLYHHwBBEHmINAMfoV/QCqks7OoAi9H:Iw9dnoSjzaUYwEH/VoWtBH
MD5 SHA1 SHA512 SSDEEP

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Mobile v15

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