Malware Analysis Report

2025-01-22 12:56

Sample ID 241228-f47erswqap
Target Cryptor.rar
SHA256 3c929d7c2dfe5638f93422aa26f6b6ef06624d0f8daa49887db9aac351d7b9d4
Tags
office04 upx quasar lucastealer spyware trojan credential_access execution stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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: behavioral3

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral4

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

3c929d7c2dfe5638f93422aa26f6b6ef06624d0f8daa49887db9aac351d7b9d4

Threat Level: Known bad

The file Cryptor.rar was found to be: Known bad.

Malicious Activity Summary

office04 upx quasar lucastealer spyware trojan credential_access execution stealer

Lucastealer family

Luca Stealer payload

Quasar RAT

Quasar payload

Quasar family

Luca Stealer

Reads user/profile data of web browsers

Unsecured Credentials: Credentials In Files

Executes dropped EXE

Accesses cryptocurrency files/wallets, possible credential harvesting

UPX packed file

Drops file in Program Files directory

Command and Scripting Interpreter: PowerShell

Unsigned PE

Enumerates physical storage devices

Suspicious use of FindShellTrayWindow

Scheduled Task/Job: Scheduled Task

Suspicious use of SetWindowsHookEx

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-12-28 05:26

Signatures

Luca Stealer payload

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

Lucastealer family

lucastealer

Quasar family

quasar

Quasar payload

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

UPX packed file

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

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-12-28 05:26

Reported

2024-12-28 05:29

Platform

win7-20240903-en

Max time kernel

149s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Cryptor\Client-built.exe"

Signatures

Quasar RAT

trojan spyware quasar

Quasar family

quasar

Quasar payload

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Program Files\SubDir\Client.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files\SubDir\Client.exe C:\Users\Admin\AppData\Local\Temp\Cryptor\Client-built.exe N/A
File opened for modification C:\Program Files\SubDir\Client.exe C:\Users\Admin\AppData\Local\Temp\Cryptor\Client-built.exe N/A

Enumerates physical storage devices

Scheduled Task/Job: Scheduled Task

persistence execution
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 use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Cryptor\Client-built.exe N/A
Token: SeDebugPrivilege N/A C:\Program Files\SubDir\Client.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Program Files\SubDir\Client.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Program Files\SubDir\Client.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Program Files\SubDir\Client.exe N/A

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\Cryptor\Client-built.exe

"C:\Users\Admin\AppData\Local\Temp\Cryptor\Client-built.exe"

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Program Files\SubDir\Client.exe" /rl HIGHEST /f

C:\Program Files\SubDir\Client.exe

"C:\Program Files\SubDir\Client.exe"

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Program Files\SubDir\Client.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp

Files

memory/1204-0-0x000007FEF5DF3000-0x000007FEF5DF4000-memory.dmp

memory/1204-1-0x0000000000920000-0x0000000000C44000-memory.dmp

memory/1204-2-0x000007FEF5DF0000-0x000007FEF67DC000-memory.dmp

C:\Program Files\SubDir\Client.exe

MD5 ffde80003bb39e45f92460a84b343771
SHA1 1ada86e287115526fc12d74865de3ca0c59c8c08
SHA256 e057b678ff3bca92b8672af195249608bcb56cfd01c1980d14b7c3e4d6952c8b
SHA512 4ae9adb21f511b1d114d5258d24d5b138a387149c593ed0743ad644ddb9461a248919ed305dbaae6b9beed9ed4525f8ad23a653c4b6507e7a021ea05a35961b4

memory/2700-10-0x000007FEF5DF0000-0x000007FEF67DC000-memory.dmp

memory/2700-9-0x000007FEF5DF0000-0x000007FEF67DC000-memory.dmp

memory/2700-8-0x0000000000D40000-0x0000000001064000-memory.dmp

memory/1204-7-0x000007FEF5DF0000-0x000007FEF67DC000-memory.dmp

memory/2700-11-0x000007FEF5DF0000-0x000007FEF67DC000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-12-28 05:26

Reported

2024-12-28 05:29

Platform

win10v2004-20241007-en

Max time kernel

147s

Max time network

145s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Cryptor\Client-built.exe"

Signatures

Quasar RAT

trojan spyware quasar

Quasar family

quasar

Quasar payload

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Program Files\SubDir\Client.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files\SubDir\Client.exe C:\Users\Admin\AppData\Local\Temp\Cryptor\Client-built.exe N/A
File created C:\Program Files\SubDir\Client.exe C:\Users\Admin\AppData\Local\Temp\Cryptor\Client-built.exe N/A

Enumerates physical storage devices

Scheduled Task/Job: Scheduled Task

persistence execution
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 use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Cryptor\Client-built.exe N/A
Token: SeDebugPrivilege N/A C:\Program Files\SubDir\Client.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Program Files\SubDir\Client.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Program Files\SubDir\Client.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Program Files\SubDir\Client.exe N/A

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\Cryptor\Client-built.exe

"C:\Users\Admin\AppData\Local\Temp\Cryptor\Client-built.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Program Files\SubDir\Client.exe" /rl HIGHEST /f

C:\Program Files\SubDir\Client.exe

"C:\Program Files\SubDir\Client.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Program Files\SubDir\Client.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 134.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
N/A 127.0.0.1:4782 tcp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 107.12.20.2.in-addr.arpa udp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 127.0.0.1:4782 tcp

Files

memory/3980-0-0x00007FFDBF313000-0x00007FFDBF315000-memory.dmp

memory/3980-1-0x0000000000210000-0x0000000000534000-memory.dmp

memory/3980-2-0x00007FFDBF310000-0x00007FFDBFDD1000-memory.dmp

C:\Program Files\SubDir\Client.exe

MD5 ffde80003bb39e45f92460a84b343771
SHA1 1ada86e287115526fc12d74865de3ca0c59c8c08
SHA256 e057b678ff3bca92b8672af195249608bcb56cfd01c1980d14b7c3e4d6952c8b
SHA512 4ae9adb21f511b1d114d5258d24d5b138a387149c593ed0743ad644ddb9461a248919ed305dbaae6b9beed9ed4525f8ad23a653c4b6507e7a021ea05a35961b4

memory/228-9-0x00007FFDBF310000-0x00007FFDBFDD1000-memory.dmp

memory/3980-8-0x00007FFDBF310000-0x00007FFDBFDD1000-memory.dmp

memory/228-10-0x00007FFDBF310000-0x00007FFDBFDD1000-memory.dmp

memory/228-11-0x000000001C610000-0x000000001C660000-memory.dmp

memory/228-12-0x000000001C720000-0x000000001C7D2000-memory.dmp

memory/228-13-0x00007FFDBF310000-0x00007FFDBFDD1000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-12-28 05:26

Reported

2024-12-28 05:29

Platform

win7-20240903-en

Max time kernel

119s

Max time network

120s

Command Line

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

Signatures

UPX packed file

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

Processes

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

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

Network

N/A

Files

memory/2672-0-0x000000013FBA0000-0x000000013FEBC000-memory.dmp

memory/2672-1-0x000000013FBA0000-0x000000013FEBC000-memory.dmp

Analysis: behavioral4

Detonation Overview

Submitted

2024-12-28 05:26

Reported

2024-12-28 05:29

Platform

win10v2004-20241007-en

Max time kernel

95s

Max time network

144s

Command Line

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

Signatures

Luca Stealer

stealer lucastealer

Luca Stealer payload

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

Lucastealer family

lucastealer

Reads user/profile data of web browsers

spyware stealer

Unsecured Credentials: Credentials In Files

credential_access stealer

Accesses cryptocurrency files/wallets, possible credential harvesting

spyware

UPX packed file

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

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.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

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Processes

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

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

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

"powershell.exe" -NoProfile -NonInteractive -NoLogo -Command "Get-Culture | Select -ExpandProperty DisplayName"

Network

Country Destination Domain Proto
US 8.8.8.8:53 ipwho.is udp
DE 195.201.57.90:443 ipwho.is tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 90.57.201.195.in-addr.arpa udp
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 22.49.80.91.in-addr.arpa udp
US 8.8.8.8:53 220.167.154.149.in-addr.arpa udp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 197.87.175.4.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 92.12.20.2.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp

Files

memory/3820-0-0x00007FF7D1850000-0x00007FF7D1B6C000-memory.dmp

memory/3492-1-0x00007FFCCA253000-0x00007FFCCA255000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mvhsy2kl.ktk.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/3492-11-0x0000017FFB050000-0x0000017FFB072000-memory.dmp

memory/3492-12-0x00007FFCCA250000-0x00007FFCCAD11000-memory.dmp

memory/3492-13-0x00007FFCCA250000-0x00007FFCCAD11000-memory.dmp

memory/3492-17-0x0000017FFB1E0000-0x0000017FFB3FC000-memory.dmp

memory/3492-18-0x00007FFCCA250000-0x00007FFCCAD11000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\chromium_default_webdata

MD5 0163d73ac6c04817a0bed83c3564b99f
SHA1 784001e8d0e7ab6a09202c2a1094f371f7d017cb
SHA256 5114af822abc2b0f2aabb7565919164c9babf884e34c21095213dbe6a71511ea
SHA512 47051ee935be9e9d4457447c7fe5df06a5b0c5ef55d2c757d3dfa179b6049ae79732b1552e812febe5ae41a076cb29d8a809ae9b168afc7eb4c9eadfadcf5d9b

C:\Users\Admin\AppData\Local\Temp\bravesoftware_default_login_data

MD5 349e6eb110e34a08924d92f6b334801d
SHA1 bdfb289daff51890cc71697b6322aa4b35ec9169
SHA256 c9fd7be4579e4aa942e8c2b44ab10115fa6c2fe6afd0c584865413d9d53f3b2a
SHA512 2a635b815a5e117ea181ee79305ee1baf591459427acc5210d8c6c7e447be3513ead871c605eb3d32e4ab4111b2a335f26520d0ef8c1245a4af44e1faec44574

C:\Users\Admin\AppData\Local\Temp\chromium_network_cookies

MD5 ca4fb74cc41f5e23584aed59e9b00d29
SHA1 c535853441e2a9d4a50b2c7c1f53442e06e28314
SHA256 1779ae7fbe5f4882b8600a85663b882d82e1f94336f5eea3a9d75b943e345bc2
SHA512 1f047f7f2606a1a8a94aa78982414faf1dbf1abecf3abb8dd3f403ef76f6533c6f697355774cf3dea0c54444f682b66a297eee40277f9f4762460356627a9a08

C:\Users\Admin\AppData\Local\Temp\chromium_default_login_data

MD5 a182561a527f929489bf4b8f74f65cd7
SHA1 8cd6866594759711ea1836e86a5b7ca64ee8911f
SHA256 42aad7886965428a941508b776a666a4450eb658cb90e80fae1e7457fc71f914
SHA512 9bc3bf5a82f6f057e873adebd5b7a4c64adef966537ab9c565fe7c4bb3582e2e485ff993d5ab8a6002363231958fabd0933b48811371b8c155eaa74592b66558

C:\Users\Admin\AppData\Local\Temp\5X7ZnBo6tB0O7zyKPSjUH6YlZrkwRN\sensfiles.zip

MD5 7d998f4092e9354ab33f435b677e731a
SHA1 209eeb6300ea5d85d2d463f37e72db2a71e1ac37
SHA256 657fb5cf48a0999197265169a3a7d15532e15fcceeb133d6753a43d28aa048ec
SHA512 50d2c24fa2ec30776ee5c41eae899460e9745304f0a6492d536a7cb75eb19f938cc94ecdc5e1a03eb8d7ac133131700260d7ccf04c2e935c01bd78bc647ba669

memory/3820-103-0x00007FF7D1850000-0x00007FF7D1B6C000-memory.dmp