Malware Analysis Report

2024-09-23 00:33

Sample ID 240504-ypx7nahd6z
Target readme.exe
SHA256 8d578d80eeb351ad5f7c64e454292275ed012954b47ce95841ff09129a8c5a07
Tags
stormkitty stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

8d578d80eeb351ad5f7c64e454292275ed012954b47ce95841ff09129a8c5a07

Threat Level: Known bad

The file readme.exe was found to be: Known bad.

Malicious Activity Summary

stormkitty stealer

StormKitty

StormKitty payload

Checks computer location settings

Enumerates physical storage devices

Unsigned PE

Modifies system certificate store

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Creates scheduled task(s)

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Suspicious behavior: GetForegroundWindowSpam

Uses Volume Shadow Copy service COM API

Suspicious use of SetWindowsHookEx

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-05-04 19:58

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-04 19:58

Reported

2024-05-04 20:00

Platform

win7-20240220-en

Max time kernel

118s

Max time network

140s

Command Line

"C:\Users\Admin\AppData\Local\Temp\readme.exe"

Signatures

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\System32\schtasks.exe N/A

Modifies system certificate store

evasion spyware trojan
Description Indicator Process Target
Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474\Blob = 19000000010000001000000068cb42b035ea773e52ef50ecf50ec529030000000100000014000000d4de20d05e66fc53fe1a50882c78db2852cae47409000000010000000c000000300a06082b060105050703011d0000000100000010000000918ad43a9475f78bb5243de886d8103c140000000100000014000000e59d5930824758ccacfa085436867b3ab5044df053000000010000002400000030223020060a2b06010401b13e01640130123010060a2b0601040182373c0101030200c00b0000000100000034000000420061006c00740069006d006f007200650020004300790062006500720054007200750073007400200052006f006f00740000000f0000000100000014000000ce0e658aa3e847e467a147b3049191093d055e6f20000000010000007b030000308203773082025fa0030201020204020000b9300d06092a864886f70d0101050500305a310b300906035504061302494531123010060355040a130942616c74696d6f726531133011060355040b130a43796265725472757374312230200603550403131942616c74696d6f7265204379626572547275737420526f6f74301e170d3030303531323138343630305a170d3235303531323233353930305a305a310b300906035504061302494531123010060355040a130942616c74696d6f726531133011060355040b130a43796265725472757374312230200603550403131942616c74696d6f7265204379626572547275737420526f6f7430820122300d06092a864886f70d01010105000382010f003082010a0282010100a304bb22ab983d57e826729ab579d429e2e1e89580b1b0e35b8e2b299a64dfa15dedb009056ddb282ece62a262feb488da12eb38eb219dc0412b01527b8877d31c8fc7bab988b56a09e773e81140a7d1ccca628d2de58f0ba650d2a850c328eaf5ab25878a9a961ca967b83f0cd5f7f952132fc21bd57070f08fc012ca06cb9ae1d9ca337a77d6f8ecb9f16844424813d2c0c2a4ae5e60feb6a605fcb4dd075902d459189863f5a563e0900c7d5db2067af385eaebd403ae5e843e5fff15ed69bcf939367275cf77524df3c9902cb93de5c923533f1f2498215c079929bdc63aece76e863a6b97746333bd681831f0788d76bffc9e8e5d2a86a74d90dc271a390203010001a3453043301d0603551d0e04160414e59d5930824758ccacfa085436867b3ab5044df030120603551d130101ff040830060101ff020103300e0603551d0f0101ff040403020106300d06092a864886f70d01010505000382010100850c5d8ee46f51684205a0ddbb4f27258403bdf764fd2dd730e3a41017ebda2929b6793f76f6191323b8100af958a4d46170bd04616a128a17d50abdc5bc307cd6e90c258d86404feccca37e38c637114feddd68318e4cd2b30174eebe755e07481a7f70ff165c84c07985b805fd7fbe6511a30fc002b4f852373904d5a9317a18bfa02af41299f7a34582e33c5ef59d9eb5c89e7c2ec8a49e4e08144b6dfd706d6b1a63bd64e61fb7cef0f29f2ebb1bb7f250887392c2e2e3168d9a3202ab8e18dde91011ee7e35ab90af3e30947ad0333da7650ff5fc8e9e62cf47442c015dbb1db532d247d2382ed0fe81dc326a1eb5ee3cd5fce7811d19c32442ea6339a9 C:\Users\Admin\AppData\Local\Temp\readme.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474 C:\Users\Admin\AppData\Local\Temp\readme.exe N/A
Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474\Blob = 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 C:\Users\Admin\AppData\Local\Temp\readme.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\readme.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeBackupPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeAuditPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\readme.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\readme.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2912 wrote to memory of 2520 N/A C:\Users\Admin\AppData\Local\Temp\readme.exe C:\Windows\system32\schtasks.exe
PID 2912 wrote to memory of 2520 N/A C:\Users\Admin\AppData\Local\Temp\readme.exe C:\Windows\system32\schtasks.exe
PID 2912 wrote to memory of 2520 N/A C:\Users\Admin\AppData\Local\Temp\readme.exe C:\Windows\system32\schtasks.exe
PID 2912 wrote to memory of 2648 N/A C:\Users\Admin\AppData\Local\Temp\readme.exe C:\Windows\system32\schtasks.exe
PID 2912 wrote to memory of 2648 N/A C:\Users\Admin\AppData\Local\Temp\readme.exe C:\Windows\system32\schtasks.exe
PID 2912 wrote to memory of 2648 N/A C:\Users\Admin\AppData\Local\Temp\readme.exe C:\Windows\system32\schtasks.exe
PID 2912 wrote to memory of 2784 N/A C:\Users\Admin\AppData\Local\Temp\readme.exe C:\Windows\system32\schtasks.exe
PID 2912 wrote to memory of 2784 N/A C:\Users\Admin\AppData\Local\Temp\readme.exe C:\Windows\system32\schtasks.exe
PID 2912 wrote to memory of 2784 N/A C:\Users\Admin\AppData\Local\Temp\readme.exe C:\Windows\system32\schtasks.exe
PID 2912 wrote to memory of 1496 N/A C:\Users\Admin\AppData\Local\Temp\readme.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2912 wrote to memory of 1496 N/A C:\Users\Admin\AppData\Local\Temp\readme.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2912 wrote to memory of 1496 N/A C:\Users\Admin\AppData\Local\Temp\readme.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2912 wrote to memory of 1588 N/A C:\Users\Admin\AppData\Local\Temp\readme.exe C:\Windows\System32\schtasks.exe
PID 2912 wrote to memory of 1588 N/A C:\Users\Admin\AppData\Local\Temp\readme.exe C:\Windows\System32\schtasks.exe
PID 2912 wrote to memory of 1588 N/A C:\Users\Admin\AppData\Local\Temp\readme.exe C:\Windows\System32\schtasks.exe

Uses Task Scheduler COM API

persistence

Uses Volume Shadow Copy service COM API

ransomware

Processes

C:\Users\Admin\AppData\Local\Temp\readme.exe

"C:\Users\Admin\AppData\Local\Temp\readme.exe"

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

C:\Windows\system32\schtasks.exe

"schtasks.exe" /query /TN readme.exe

C:\Windows\system32\schtasks.exe

"schtasks.exe" /Create /SC ONCE /TN "readme.exe" /TR "C:\Users\Admin\AppData\Local\Temp\readme.exe \"\readme.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST

C:\Windows\system32\schtasks.exe

"schtasks.exe" /query /TN readme.exe

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Set-MpPreference -ExclusionExtension exe,bat,dll,ps1;exit

C:\Windows\System32\schtasks.exe

"C:\Windows\System32\schtasks.exe" /create /sc hourly /mo 1 /tn "taskbar_Task-HOURLY-01" /tr "%MyFile%" /st 00:00

C:\Windows\system32\taskeng.exe

taskeng.exe {493A80B8-340F-4309-A887-0641B77D4D35} S-1-5-21-2721934792-624042501-2768869379-1000:BISMIZHX\Admin:Interactive:[1]

Network

Country Destination Domain Proto
US 8.8.8.8:53 discordapp.com udp
US 162.159.135.233:443 discordapp.com tcp
US 8.8.8.8:53 that-soldier.gl.at.ply.gg udp
US 147.185.221.19:43860 that-soldier.gl.at.ply.gg tcp

Files

memory/2912-0-0x000007FEF5E03000-0x000007FEF5E04000-memory.dmp

memory/2912-1-0x000000013F6C0000-0x000000013F728000-memory.dmp

memory/2912-2-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

memory/1496-7-0x000000001B640000-0x000000001B922000-memory.dmp

memory/1496-8-0x00000000022C0000-0x00000000022C8000-memory.dmp

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

MD5 29f65ba8e88c063813cc50a4ea544e93
SHA1 05a7040d5c127e68c25d81cc51271ffb8bef3568
SHA256 1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184
SHA512 e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

C:\Users\Admin\AppData\Local\Temp\Tar2E29.tmp

MD5 435a9ac180383f9fa094131b173a2f7b
SHA1 76944ea657a9db94f9a4bef38f88c46ed4166983
SHA256 67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34
SHA512 1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

MD5 6a589796153e399eb04ae9b34e2ec6a1
SHA1 87895f7dc7dca0d1374d8a0b2630e92f6f664ebb
SHA256 e9a7f4e2465c18187387e6ea9328ca584bb48f15d274b3de646b6cd1997fc938
SHA512 b9431f9c0fd6e0d9602aa326af92e7691cdcb453eb3ac8d68ab6adb6cbf694de4b75e89d0e1f32b4dcf9f0d5507de90821f5d64f5cbaf1c013b39c49ebf33184

memory/2912-75-0x000007FEF5E03000-0x000007FEF5E04000-memory.dmp

memory/2912-76-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-04 19:58

Reported

2024-05-04 20:00

Platform

win10v2004-20240426-en

Max time kernel

141s

Max time network

144s

Command Line

"C:\Users\Admin\AppData\Local\Temp\readme.exe"

Signatures

StormKitty

stealer stormkitty

StormKitty payload

Description Indicator Process Target
N/A N/A N/A N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\readme.exe N/A

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\SYSTEM32\schtasks.exe N/A
N/A N/A C:\Windows\System32\schtasks.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\readme.exe N/A

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\readme.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeBackupPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeAuditPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\readme.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\readme.exe N/A

Uses Task Scheduler COM API

persistence

Uses Volume Shadow Copy service COM API

ransomware

Processes

C:\Users\Admin\AppData\Local\Temp\readme.exe

"C:\Users\Admin\AppData\Local\Temp\readme.exe"

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

C:\Windows\SYSTEM32\schtasks.exe

"schtasks.exe" /query /TN readme.exe

C:\Windows\SYSTEM32\schtasks.exe

"schtasks.exe" /Create /SC ONCE /TN "readme.exe" /TR "C:\Users\Admin\AppData\Local\Temp\readme.exe \"\readme.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST

C:\Windows\SYSTEM32\schtasks.exe

"schtasks.exe" /query /TN readme.exe

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Set-MpPreference -ExclusionExtension exe,bat,dll,ps1;exit

C:\Windows\System32\schtasks.exe

"C:\Windows\System32\schtasks.exe" /create /sc hourly /mo 1 /tn "taskbar_Task-HOURLY-01" /tr "%MyFile%" /st 00:00

Network

Country Destination Domain Proto
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
NL 23.62.61.146:443 www.bing.com tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
NL 23.62.61.146:443 www.bing.com tcp
US 8.8.8.8:53 146.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 133.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 discordapp.com udp
US 162.159.129.233:443 discordapp.com tcp
US 8.8.8.8:53 233.129.159.162.in-addr.arpa udp
US 8.8.8.8:53 that-soldier.gl.at.ply.gg udp
US 147.185.221.19:43860 that-soldier.gl.at.ply.gg tcp
US 8.8.8.8:53 19.221.185.147.in-addr.arpa udp
US 8.8.8.8:53 77.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 134.71.91.104.in-addr.arpa udp
US 147.185.221.19:43860 that-soldier.gl.at.ply.gg tcp
US 8.8.8.8:53 219.183.117.104.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 216.131.50.23.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 147.185.221.19:43860 that-soldier.gl.at.ply.gg tcp

Files

memory/408-1-0x00007FFC70883000-0x00007FFC70885000-memory.dmp

memory/408-0-0x0000000000780000-0x00000000007E8000-memory.dmp

memory/408-2-0x00007FFC70880000-0x00007FFC71341000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_llzhoouo.zvk.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/1524-12-0x000001B71A400000-0x000001B71A422000-memory.dmp

memory/408-17-0x00007FFC70883000-0x00007FFC70885000-memory.dmp

memory/408-18-0x00007FFC70880000-0x00007FFC71341000-memory.dmp

memory/408-19-0x0000000003180000-0x0000000003190000-memory.dmp

memory/408-21-0x00000000010A0000-0x00000000010CA000-memory.dmp