donutloader | 66cd6867af5a3c076f82ee2835039367abf76f73828e80a713ab43851a2bd676

System Information Discovery

persistence privilege_escalation

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1846164713-4096795028-774071693-1000\Control Panel\International\Geo\Nation	kisa.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1846164713-4096795028-774071693-1000\Control Panel\International\Geo\Nation	CoreWorker_kVWUPGNUOYvPizT.exe

Creates a file in the Startup directory 1 TTPs 1 IoCs

A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.

Registry Run Keys / Startup Folder

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Windows Repair.lnk	kisa.exe

Executes dropped EXE 2 IoCs

pid	Process
3380	CoreWorker_kVWUPGNUOYvPizT.exe
3800	CoreWorker_kVWUPGNUOYvPizT.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1846164713-4096795028-774071693-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\CoreWorker_kVWUPGNUOYvPizT = "C:\\Users\\Admin\\AppData\\Local\\MpDefenderCoreFolder\\CoreWorker_kVWUPGNUOYvPizT.exe"	CoreWorker_kVWUPGNUOYvPizT.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\CoreWorker_kVWUPGNUOYvPizT = "C:\\Users\\Admin\\AppData\\Local\\MpDefenderCoreFolder\\CoreWorker_kVWUPGNUOYvPizT.exe"	CoreWorker_kVWUPGNUOYvPizT.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1846164713-4096795028-774071693-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\CoreWorker_kVWUPGNUOYvPizT = "C:\\Users\\Admin\\AppData\\Local\\MpDefenderCoreFolder\\CoreWorker_kVWUPGNUOYvPizT.exe"	kisa.exe

Enumerates connected drives 3 TTPs 3 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

Peripheral Device Discovery

T1120

System Information Discovery

ioc	Process
\??\F:\	powershell.exe
\??\F:\	powershell.exe
\??\F:\	powershell.exe

Looks up external IP address via web service 1 TTPs 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

discovery

Internet Connection Discovery

T1016.001

flow	ioc
24	ip-api.com

Suspicious use of NtSetInformationThreadHideFromDebugger 1 TTPs 4 IoCs

defense_evasion

Debugger Evasion

T1622

pid	Process
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
2396	cmd.exe
4316	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	kisa.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	kisa.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	kisa.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	kisa.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe
2508	kisa.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2508	kisa.exe
Token: SeDebugPrivilege	2332	powershell.exe
Token: SeDebugPrivilege	3380	CoreWorker_kVWUPGNUOYvPizT.exe
Token: SeDebugPrivilege	3380	CoreWorker_kVWUPGNUOYvPizT.exe
Token: SeDebugPrivilege	736	powershell.exe
Token: SeDebugPrivilege	5088	powershell.exe
Token: SeIncreaseQuotaPrivilege	736	powershell.exe
Token: SeSecurityPrivilege	736	powershell.exe
Token: SeTakeOwnershipPrivilege	736	powershell.exe
Token: SeLoadDriverPrivilege	736	powershell.exe
Token: SeSystemProfilePrivilege	736	powershell.exe
Token: SeSystemtimePrivilege	736	powershell.exe
Token: SeProfSingleProcessPrivilege	736	powershell.exe
Token: SeIncBasePriorityPrivilege	736	powershell.exe
Token: SeCreatePagefilePrivilege	736	powershell.exe
Token: SeBackupPrivilege	736	powershell.exe
Token: SeRestorePrivilege	736	powershell.exe
Token: SeShutdownPrivilege	736	powershell.exe
Token: SeDebugPrivilege	736	powershell.exe
Token: SeSystemEnvironmentPrivilege	736	powershell.exe
Token: SeRemoteShutdownPrivilege	736	powershell.exe
Token: SeUndockPrivilege	736	powershell.exe
Token: SeManageVolumePrivilege	736	powershell.exe
Token: 33	736	powershell.exe
Token: 34	736	powershell.exe
Token: 35	736	powershell.exe
Token: 36	736	powershell.exe
Token: SeIncreaseQuotaPrivilege	736	powershell.exe
Token: SeSecurityPrivilege	736	powershell.exe
Token: SeTakeOwnershipPrivilege	736	powershell.exe
Token: SeLoadDriverPrivilege	736	powershell.exe
Token: SeSystemProfilePrivilege	736	powershell.exe
Token: SeSystemtimePrivilege	736	powershell.exe
Token: SeProfSingleProcessPrivilege	736	powershell.exe
Token: SeIncBasePriorityPrivilege	736	powershell.exe
Token: SeCreatePagefilePrivilege	736	powershell.exe
Token: SeBackupPrivilege	736	powershell.exe
Token: SeRestorePrivilege	736	powershell.exe
Token: SeShutdownPrivilege	736	powershell.exe
Token: SeDebugPrivilege	736	powershell.exe
Token: SeSystemEnvironmentPrivilege	736	powershell.exe
Token: SeRemoteShutdownPrivilege	736	powershell.exe
Token: SeUndockPrivilege	736	powershell.exe
Token: SeManageVolumePrivilege	736	powershell.exe
Token: 33	736	powershell.exe
Token: 34	736	powershell.exe
Token: 35	736	powershell.exe
Token: 36	736	powershell.exe
Token: SeIncreaseQuotaPrivilege	736	powershell.exe
Token: SeSecurityPrivilege	736	powershell.exe
Token: SeTakeOwnershipPrivilege	736	powershell.exe
Token: SeLoadDriverPrivilege	736	powershell.exe
Token: SeSystemProfilePrivilege	736	powershell.exe
Token: SeSystemtimePrivilege	736	powershell.exe
Token: SeProfSingleProcessPrivilege	736	powershell.exe
Token: SeIncBasePriorityPrivilege	736	powershell.exe
Token: SeCreatePagefilePrivilege	736	powershell.exe
Token: SeBackupPrivilege	736	powershell.exe
Token: SeRestorePrivilege	736	powershell.exe
Token: SeShutdownPrivilege	736	powershell.exe
Token: SeDebugPrivilege	736	powershell.exe
Token: SeSystemEnvironmentPrivilege	736	powershell.exe
Token: SeRemoteShutdownPrivilege	736	powershell.exe
Token: SeUndockPrivilege	736	powershell.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2508 wrote to memory of 2684	2508	kisa.exe	93
PID 2508 wrote to memory of 2948	2508	kisa.exe	94
PID 2508 wrote to memory of 2684	2508	kisa.exe	93
PID 2508 wrote to memory of 2948	2508	kisa.exe	94
PID 2508 wrote to memory of 4316	2508	kisa.exe	98
PID 4316 wrote to memory of 2332	4316	cmd.exe	101
PID 2508 wrote to memory of 3380	2508	kisa.exe	103
PID 3380 wrote to memory of 736	3380	CoreWorker_kVWUPGNUOYvPizT.exe	104
PID 3380 wrote to memory of 2396	3380	CoreWorker_kVWUPGNUOYvPizT.exe	106
PID 2396 wrote to memory of 5088	2396	cmd.exe	109

C:\Users\Admin\AppData\Local\Temp\kisa.exe
"C:\Users\Admin\AppData\Local\Temp\kisa.exe"
1⤵
- Checks computer location settings
- Creates a file in the Startup directory
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Reads the TCP/IP host and domain name from the registry
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2508
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"
  2⤵
  PID:2684
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe"
  2⤵
  PID:2948
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c powershell -C "Add-MpPreference -ExclusionExtension '.exe' -EA 0"
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:4316
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell -C "Add-MpPreference -ExclusionExtension '.exe' -EA 0"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Enumerates connected drives
    - Suspicious use of AdjustPrivilegeToken
    PID:2332
- C:\Users\Admin\AppData\Local\MpDefenderCoreFolder\CoreWorker_kVWUPGNUOYvPizT.exe
  "C:\Users\Admin\AppData\Local\MpDefenderCoreFolder\CoreWorker_kVWUPGNUOYvPizT.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3380
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -ExecutionPolicy Bypass -Command " $action = New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Local\MpDefenderCoreFolder\CoreWorker_kVWUPGNUOYvPizT.exe' $trigger = New-ScheduledTaskTrigger -AtLogOn Register-ScheduledTask -Action $action -Trigger $trigger -TaskName 'CoreWorker_kVWUPGNUOYvPizT-5703' -RunLevel Highest "
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Enumerates connected drives
    - Suspicious use of AdjustPrivilegeToken
    PID:736
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /c powershell -Command "Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\MpDefenderCoreFolder'"
    3⤵
    - Executes a command shell one-liner
    - Suspicious use of WriteProcessMemory
    PID:2396
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell -Command "Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\MpDefenderCoreFolder'"
      4⤵
      Command and Scripting Interpreter: PowerShell
      Enumerates connected drives
      Suspicious use of AdjustPrivilegeToken
      PID:5088

C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe
"C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe"
1⤵
PID:928

C:\Program Files (x86)\Microsoft\Edge\Application\139.0.3405.125\elevation_service.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\139.0.3405.125\elevation_service.exe"
1⤵
PID:1492

C:\Users\Admin\AppData\Local\MpDefenderCoreFolder\CoreWorker_kVWUPGNUOYvPizT.exe
C:\Users\Admin\AppData\Local\MpDefenderCoreFolder\CoreWorker_kVWUPGNUOYvPizT.exe
1⤵
- Executes dropped EXE
PID:3800

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Windows Command Shell

T1059.003

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Defense Evasion

Debugger Evasion

T1622

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Debugger Evasion

T1622

Peripheral Device Discovery

T1120

Query Registry

System Information Discovery