redline | 664ac4c9ff82d8d92a4db78ad4e561275f0f8e4cfc64b2240896ebaef5ff27c2

Windows Service

Disable or Modify Tools

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\DisableAntiSpyware = "1"	a0077282.exe

Modifies Windows Defender Real-time Protection settings 3 TTPs 6 IoCs

defense_evasion trojan

Modify Registry

Windows Service

Disable or Modify Tools

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection	a0077282.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	a0077282.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableIOAVProtection = "1"	a0077282.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	a0077282.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableRealtimeMonitoring = "1"	a0077282.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	a0077282.exe

Modifies Windows Defender TamperProtection settings 3 TTPs 1 IoCs

evasion trojan

Modify Registry

Windows Service

Disable or Modify Tools

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	a0077282.exe

Modifies Windows Defender notification settings 3 TTPs 2 IoCs

defense_evasion trojan

Windows Service

Modify Registry

Disable or Modify Tools

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender Security Center\Notifications	a0077282.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender Security Center\Notifications\DisableNotifications = "1"	a0077282.exe

RedLine
RedLine Stealer is a malware family written in C#, first appearing in early 2020.
infostealer redline

RedLine payload 2 IoCs

resource	yara_rule
behavioral1/files/0x0007000000023c8c-47.dat	family_redline
behavioral1/memory/3212-50-0x0000000000600000-0x000000000062A000-memory.dmp	family_redline

Redline family
redline

Executes dropped EXE 2 IoCs

pid	Process
2908	a0077282.exe
3212	b2456359.exe

Windows security modification 2 TTPs 2 IoCs

defense_evasion trojan

Disable or Modify Tools

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features	a0077282.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	a0077282.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\""	664ac4c9ff82d8d92a4db78ad4e561275f0f8e4cfc64b2240896ebaef5ff27c2N.exe

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b2456359.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	664ac4c9ff82d8d92a4db78ad4e561275f0f8e4cfc64b2240896ebaef5ff27c2N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a0077282.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2908	a0077282.exe
2908	a0077282.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2908	a0077282.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4220 wrote to memory of 2908	4220	664ac4c9ff82d8d92a4db78ad4e561275f0f8e4cfc64b2240896ebaef5ff27c2N.exe	86
PID 4220 wrote to memory of 2908	4220	664ac4c9ff82d8d92a4db78ad4e561275f0f8e4cfc64b2240896ebaef5ff27c2N.exe	86
PID 4220 wrote to memory of 2908	4220	664ac4c9ff82d8d92a4db78ad4e561275f0f8e4cfc64b2240896ebaef5ff27c2N.exe	86
PID 4220 wrote to memory of 3212	4220	664ac4c9ff82d8d92a4db78ad4e561275f0f8e4cfc64b2240896ebaef5ff27c2N.exe	87
PID 4220 wrote to memory of 3212	4220	664ac4c9ff82d8d92a4db78ad4e561275f0f8e4cfc64b2240896ebaef5ff27c2N.exe	87
PID 4220 wrote to memory of 3212	4220	664ac4c9ff82d8d92a4db78ad4e561275f0f8e4cfc64b2240896ebaef5ff27c2N.exe	87

C:\Users\Admin\AppData\Local\Temp\664ac4c9ff82d8d92a4db78ad4e561275f0f8e4cfc64b2240896ebaef5ff27c2N.exe
"C:\Users\Admin\AppData\Local\Temp\664ac4c9ff82d8d92a4db78ad4e561275f0f8e4cfc64b2240896ebaef5ff27c2N.exe"
1⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4220
- C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\a0077282.exe
  C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\a0077282.exe
  2⤵
  - Modifies Windows Defender DisableAntiSpyware settings
  - Modifies Windows Defender Real-time Protection settings
  - Modifies Windows Defender TamperProtection settings
  - Modifies Windows Defender notification settings
  - Executes dropped EXE
  - Windows security modification
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2908
- C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\b2456359.exe
  C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\b2456359.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:3212

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

Defense Evasion

Impair Defenses

5

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery