fa0eb78eda4edce77d74a3752a4d06faf1066e8afe4bfe238cea14344584e5e8

General

Target

psk.apk
Size

1.9MB
MD5

b2d81d6c49d039dcb84834004371f693
SHA1

eeeeda669ab6adc637e353ea83fbbc5015464022
SHA256

fa0eb78eda4edce77d74a3752a4d06faf1066e8afe4bfe238cea14344584e5e8
SHA512

cf87438682db02081f63a006f03b5e89e1e4d5e9120bb9787cc8372cac1fb37c255a1f512c5e0cfb88426291902d80dc52c2e2dac91453f53b73563e9b95f4e8

Score

8^/10

banker 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.findAccessibilityNodeInfosByViewId	com.mazocexayori.kute
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText	com.mazocexayori.kute
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfoByAccessibilityId	com.mazocexayori.kute

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

Processes:

com.mazocexayori.kute

description ioc process

Framework service call android.content.pm.IPackageManager.getInstalledApplications 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.content.pm.IPackageManager.getInstalledApplications	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/SqcLUK.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.mazocexayori.kute/app_DynamicOptDex/oat/x86/SqcLUK.odex --compiler-filter=quicken --class-loader-context=&com.mazocexayori.kute

ioc	pid	process
/data/user/0/com.mazocexayori.kute/app_DynamicOptDex/SqcLUK.json	5149	/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/SqcLUK.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.mazocexayori.kute/app_DynamicOptDex/oat/x86/SqcLUK.odex --compiler-filter=quicken --class-loader-context=&
/data/user/0/com.mazocexayori.kute/app_DynamicOptDex/SqcLUK.json	5099	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.
- Queries a list of all the installed applications on the device (Might be used in an attempt to overlay legitimate apps).
- Acquires the wake lock.
- Loads dropped Dex/Jar
- Removes a system notification.
- Uses Crypto APIs (Might try to encrypt user data).
PID:5099

/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/SqcLUK.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.mazocexayori.kute/app_DynamicOptDex/oat/x86/SqcLUK.odex --compiler-filter=quicken --class-loader-context=&
2⤵
- Loads dropped Dex/Jar
PID:5149

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

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

Filesize
455KB

MD5
3dbf6ab4d485b3f00ee109a9391d0d9e

SHA1
c524bdead3b2e2982c1414330f38ce3c929916c3

SHA256
6ab4a11f864279ba6af43829c270e49493455da18d8d737990aa1d989849161e

SHA512
94a9e3b4e8ff16005ebfed3a085ab7506a68d01cab7d0694b4520ec829936232360d8281fc927b65dff36ed5d0e7eb47cc611b490b0bc6f80c92c9211dee8ce3

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

Filesize
899KB

MD5
4a5197f9217622442cd5a6184973fbca

SHA1
83dbd82074429fd14f5c6a9469b2aa6e05ff3a07

SHA256
65d77298d0bd4681dbef3a6240d0a982fb3dd1f8b622a6c202b59a16fe244169

SHA512
06486b4797d570ee96d47139b4b9e0742c3e565a6fd59643996f3fb1de900ff7bf13f909090685be51eb1bb797a9e7ae4bdaa47e52c7151330b5a458701e9b71

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

Filesize
899KB

MD5
469e764d83595045fb5f0d08b03adb3a

SHA1
9b31424e2be9320e4484235691c2e39aaf870271

SHA256
d4e5fc87c9c19bcaa58bd78327d7eb240c983435cd6eaa772424c4166248177c

SHA512
7caca18d874d3731cc7a5ebfc9f1ddfe87793557e00b5592e909f333f6e1a1dbb12040132d51ba02567360720d54e716102c212f711b9a80ceec8c3f1194e56f

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

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

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

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

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

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

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

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit

Analysis

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