0dc975df4f929ed0422fb5c9a9582d3d5e11ab176cc3176e269b2a456d48d571

General

Target

psk.apk
Size

1.9MB
MD5

49305965693a47cac8fe54d325d50d1f
SHA1

7b7fbbe3f02ead6e985cf4619948ce003b4eb3f3
SHA256

0dc975df4f929ed0422fb5c9a9582d3d5e11ab176cc3176e269b2a456d48d571
SHA512

afdccaa0a03046355adfed5526cdec0881f68b6073eb0a574b21b08cc9abafda4ac8fe0ec6382881fb641a38b33b9f5f617ff822db7d8ef4bd5c32fbeec70322

Score

8^/10

evasion ransomware

Malware Config

Signatures

Makes use of the framework's Accessibility service. 3 IoCs

Processes:

com.mazocexayori.kute

description	ioc	process
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfoByAccessibilityId	com.mazocexayori.kute
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId	com.mazocexayori.kute
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText	com.mazocexayori.kute

Acquires the wake lock. 1 IoCs

Processes:

com.mazocexayori.kute

description ioc process

Framework service call android.os.IPowerManager.acquireWakeLock com.mazocexayori.kute

description	ioc	process
Framework service call	android.os.IPowerManager.acquireWakeLock	com.mazocexayori.kute

Loads dropped Dex/Jar 2 IoCs

Runs executable file dropped to the device during analysis.

Processes:

/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.mazocexayori.kute/app_DynamicOptDex/UjucuA.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.mazocexayori.kute/app_DynamicOptDex/oat/x86/UjucuA.odex --compiler-filter=quicken --class-loader-context=&com.mazocexayori.kute

ioc	pid	process
/data/user/0/com.mazocexayori.kute/app_DynamicOptDex/UjucuA.json	5173	/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.mazocexayori.kute/app_DynamicOptDex/UjucuA.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.mazocexayori.kute/app_DynamicOptDex/oat/x86/UjucuA.odex --compiler-filter=quicken --class-loader-context=&
/data/user/0/com.mazocexayori.kute/app_DynamicOptDex/UjucuA.json	5136	com.mazocexayori.kute

Reads information about phone network operator.
Removes a system notification. 1 IoCs
evasion

Processes:

com.mazocexayori.kute

description ioc process

Framework service call android.app.INotificationManager.cancelNotificationWithTag com.mazocexayori.kute
Uses Crypto APIs (Might try to encrypt user data). 1 IoCs
ransomware

Processes:

com.mazocexayori.kute

description ioc process

Framework API call javax.crypto.Cipher.doFinal com.mazocexayori.kute

description	ioc	process
Framework service call	android.app.INotificationManager.cancelNotificationWithTag	com.mazocexayori.kute

description	ioc	process
Framework API call	javax.crypto.Cipher.doFinal	com.mazocexayori.kute

com.mazocexayori.kute
1⤵
- Makes use of the framework's Accessibility service.
- Acquires the wake lock.
- Loads dropped Dex/Jar
- Removes a system notification.
- Uses Crypto APIs (Might try to encrypt user data).
PID:5136
- /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.mazocexayori.kute/app_DynamicOptDex/UjucuA.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.mazocexayori.kute/app_DynamicOptDex/oat/x86/UjucuA.odex --compiler-filter=quicken --class-loader-context=&
  2⤵
  - Loads dropped Dex/Jar
  PID:5173

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

/data/user/0/com.mazocexayori.kute/app_DynamicOptDex/UjucuA.json

Filesize
455KB

MD5
dd7df6c80724b39b9b028400c5f3c6f1

SHA1
66439f9f7aea2c686d663f50853ce39e24f12751

SHA256
8c49479ae97821063c9d7caefb17757db99f5d10aa110704f596b22a82439d97

SHA512
5cc610ee7b9a57ff4d5b5b0dc95938046a76233feda9ae98b9f7ee98ee97b02e6385a5c56410b31489cf1093ed2ad87f3add08e45cd9dad1f0584af15f2ff584

Download Submit
/data/user/0/com.mazocexayori.kute/app_DynamicOptDex/UjucuA.json

Filesize
899KB

MD5
4a5197f9217622442cd5a6184973fbca

SHA1
83dbd82074429fd14f5c6a9469b2aa6e05ff3a07

SHA256
65d77298d0bd4681dbef3a6240d0a982fb3dd1f8b622a6c202b59a16fe244169

SHA512
06486b4797d570ee96d47139b4b9e0742c3e565a6fd59643996f3fb1de900ff7bf13f909090685be51eb1bb797a9e7ae4bdaa47e52c7151330b5a458701e9b71

Download Submit
/data/user/0/com.mazocexayori.kute/app_DynamicOptDex/UjucuA.json

Filesize
899KB

MD5
469e764d83595045fb5f0d08b03adb3a

SHA1
9b31424e2be9320e4484235691c2e39aaf870271

SHA256
d4e5fc87c9c19bcaa58bd78327d7eb240c983435cd6eaa772424c4166248177c

SHA512
7caca18d874d3731cc7a5ebfc9f1ddfe87793557e00b5592e909f333f6e1a1dbb12040132d51ba02567360720d54e716102c212f711b9a80ceec8c3f1194e56f

Download Submit
/data/user/0/com.mazocexayori.kute/app_DynamicOptDex/UjucuA.json.x86.flock

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
/data/user/0/com.mazocexayori.kute/app_DynamicOptDex/oat/UjucuA.json.cur.prof

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
/data/user/0/com.mazocexayori.kute/app_DynamicOptDex/oat/x86/UjucuA.odex

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
/data/user/0/com.mazocexayori.kute/app_DynamicOptDex/oat/x86/UjucuA.vdex

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit

Analysis

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