Malware Analysis Report

2024-09-23 00:20

Sample ID 240508-r6w8cshg2x
Target SantosExecutorInstaller.exe
SHA256 2ab6390fcc902b46d3df5107416223da2d1c275d80aab0b7b7d6c0ee8c219644
Tags
xworm stormkitty execution rat spyware stealer trojan
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

2ab6390fcc902b46d3df5107416223da2d1c275d80aab0b7b7d6c0ee8c219644

Threat Level: Known bad

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

Malicious Activity Summary

xworm stormkitty execution rat spyware stealer trojan

StormKitty payload

Xworm family

Xworm

StormKitty

Detect Xworm Payload

Command and Scripting Interpreter: PowerShell

Checks computer location settings

Drops startup file

Reads user/profile data of web browsers

Looks up external IP address via web service

Enumerates physical storage devices

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of WriteProcessMemory

Suspicious use of SendNotifyMessage

Suspicious behavior: GetForegroundWindowSpam

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-05-08 14:48

Signatures

Detect Xworm Payload

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

Xworm family

xworm

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-08 14:48

Reported

2024-05-08 14:51

Platform

win7-20240221-en

Max time kernel

124s

Max time network

121s

Command Line

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

Signatures

Detect Xworm Payload

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

StormKitty

stealer stormkitty

StormKitty payload

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

Xworm

trojan rat xworm

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe N/A

Reads user/profile data of web browsers

spyware stealer

Looks up external IP address via web service

Description Indicator Process Target
N/A ip-api.com N/A N/A

Enumerates physical storage devices

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Windows\system32\taskmgr.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\system32\taskmgr.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2208 wrote to memory of 2652 N/A C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2208 wrote to memory of 2652 N/A C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2208 wrote to memory of 2652 N/A C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2208 wrote to memory of 2632 N/A C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2208 wrote to memory of 2632 N/A C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2208 wrote to memory of 2632 N/A C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2208 wrote to memory of 2964 N/A C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2208 wrote to memory of 2964 N/A C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2208 wrote to memory of 2964 N/A C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2208 wrote to memory of 1368 N/A C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2208 wrote to memory of 1368 N/A C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2208 wrote to memory of 1368 N/A C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

Processes

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

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

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

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe'

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

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'SantosExecutorInstaller.exe'

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

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\svchost.exe'

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

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'

C:\Windows\system32\taskmgr.exe

"C:\Windows\system32\taskmgr.exe" /4

Network

Country Destination Domain Proto
US 8.8.8.8:53 ip-api.com udp
US 208.95.112.1:80 ip-api.com tcp
US 8.8.8.8:53 api.telegram.org udp
NL 149.154.167.220:443 api.telegram.org tcp
US 8.8.8.8:53 introduction-specifications.gl.at.ply.gg udp
US 147.185.221.19:47117 introduction-specifications.gl.at.ply.gg tcp
US 147.185.221.19:47117 introduction-specifications.gl.at.ply.gg tcp
US 147.185.221.19:47117 introduction-specifications.gl.at.ply.gg tcp
US 147.185.221.19:47117 introduction-specifications.gl.at.ply.gg tcp

Files

memory/2208-0-0x000007FEF5C73000-0x000007FEF5C74000-memory.dmp

memory/2208-1-0x0000000000380000-0x00000000003A8000-memory.dmp

memory/2208-2-0x000007FEF5C70000-0x000007FEF665C000-memory.dmp

memory/2652-7-0x00000000029C0000-0x0000000002A40000-memory.dmp

memory/2652-8-0x000000001B650000-0x000000001B932000-memory.dmp

memory/2652-9-0x00000000027E0000-0x00000000027E8000-memory.dmp

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

MD5 599c3ca3206ee21ced376c4c0385e17a
SHA1 bd3baab7254a001015ba1d7dcc0be4ef7728ad5f
SHA256 9f4617383b68a33c7aca7488998db4af88a4615fead3185d3987e2ee4fe85148
SHA512 b8304034ffbf68e774679e81b841653ded7b6f8ea8891d6723954bd5a316f28256084bf4f32f93ea8ed2e403b09c3ea280a190208952a866151f3036f14b9240

memory/2632-15-0x000000001B580000-0x000000001B862000-memory.dmp

memory/2632-16-0x0000000002350000-0x0000000002358000-memory.dmp

memory/2208-31-0x000007FEF5C73000-0x000007FEF5C74000-memory.dmp

memory/2208-32-0x000000001AB30000-0x000000001AB3C000-memory.dmp

memory/2208-33-0x000007FEF5C70000-0x000007FEF665C000-memory.dmp

memory/2208-35-0x000000001CD90000-0x000000001CEAE000-memory.dmp

memory/1304-59-0x0000000140000000-0x00000001405E8000-memory.dmp

memory/1304-60-0x0000000140000000-0x00000001405E8000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-08 14:48

Reported

2024-05-08 14:51

Platform

win10v2004-20240226-en

Max time kernel

141s

Max time network

151s

Command Line

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

Signatures

Detect Xworm Payload

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

Xworm

trojan rat xworm

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A ip-api.com N/A N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

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

Processes

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

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

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

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\SantosExecutorInstaller.exe'

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

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'SantosExecutorInstaller.exe'

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

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\svchost.exe'

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

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1340 --field-trial-handle=2236,i,5367110156796017614,12594004256180761011,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 ip-api.com udp
US 208.95.112.1:80 ip-api.com tcp
US 8.8.8.8:53 77.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 1.112.95.208.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 20.231.121.79:80 tcp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 udp
NL 149.154.167.220:443 api.telegram.org tcp
US 8.8.8.8:53 220.167.154.149.in-addr.arpa udp
US 8.8.8.8:53 introduction-specifications.gl.at.ply.gg udp
US 147.185.221.19:47117 introduction-specifications.gl.at.ply.gg tcp
US 8.8.8.8:53 19.221.185.147.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 13.107.246.64:443 tcp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 24.121.18.2.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 95.16.208.104.in-addr.arpa udp

Files

memory/392-0-0x00007FFBEE9A3000-0x00007FFBEE9A5000-memory.dmp

memory/392-1-0x0000000000F70000-0x0000000000F98000-memory.dmp

memory/392-2-0x00007FFBEE9A0000-0x00007FFBEF461000-memory.dmp

memory/4108-3-0x000001F6FE1D0000-0x000001F6FE1F2000-memory.dmp

memory/4108-4-0x00007FFBEE9A0000-0x00007FFBEF461000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_tbln5n5w.0jz.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/4108-14-0x00007FFBEE9A0000-0x00007FFBEF461000-memory.dmp

memory/4108-15-0x00007FFBEE9A0000-0x00007FFBEF461000-memory.dmp

memory/4108-16-0x00007FFBEE9A0000-0x00007FFBEF461000-memory.dmp

memory/4108-17-0x00007FFBEE9A0000-0x00007FFBEF461000-memory.dmp

memory/4108-20-0x00007FFBEE9A0000-0x00007FFBEF461000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 3a6bad9528f8e23fb5c77fbd81fa28e8
SHA1 f127317c3bc6407f536c0f0600dcbcf1aabfba36
SHA256 986366767de5873f1b170a63f2a33ce05132d1afd90c8f5017afbca8ef1beb05
SHA512 846002154a0ece6f3e9feda6f115d3161dc21b3789525dd62ae1d9188495171293efdbe7be4710666dd8a15e66b557315b5a02918a741ed1d5f3ff0c515b98e2

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 ef72c47dbfaae0b9b0d09f22ad4afe20
SHA1 5357f66ba69b89440b99d4273b74221670129338
SHA256 692ec20c7039170fb199510f0436181fd155e6b4516d4d1c9e1675adf99aaa7f
SHA512 7514b6bc8dc39fa618223300be27cd535dc35b18c66b4a089e2302e72b3e0cac06d88a989fa1296feb386b3cbe2084019df6430c7f895071b76e04ce559a30b4

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 f0a41fc9c1123bb127e55ecc66c8f052
SHA1 57152411758fa3df2623cc8a4df6d9fea73652f8
SHA256 a4fe2be2c449e841f6a12d32114672b097fc1058b6f2971a03521220a0228745
SHA512 e3e967adac361ddcf8240cf641f3e77eacfefc61dec725b8ae12e6a94f7d2ebd937fb9eb3cd068a0b3d4306e163dc87773b322bc2dd8b7df93b8103d0e99a900

memory/392-59-0x00007FFBEE9A3000-0x00007FFBEE9A5000-memory.dmp

memory/392-60-0x00007FFBEE9A0000-0x00007FFBEF461000-memory.dmp