modiloader | 244af2b75e59120c8a306b1b64b946be401d64b4cf3c22c5bead31772b24d116

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0"	BiFrOsT.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions = "0"	BiFrOsT.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "1"	BiFrOsT.exe

Modiloader family
modiloader
Sality
Sality is backdoor written in C++, first discovered in 2003.
backdoor sality
Sality family
sality

UAC bypass 3 TTPs 1 IoCs

Bypass User Account Control

T1548.002

Disable or Modify Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	BiFrOsT.exe

Windows security bypass 2 TTPs 6 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UacDisableNotify = "1"	BiFrOsT.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	BiFrOsT.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	BiFrOsT.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	BiFrOsT.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallOverride = "1"	BiFrOsT.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	BiFrOsT.exe

ModiLoader Second Stage 5 IoCs

resource	yara_rule
behavioral1/files/0x002c000000016d70-12.dat	modiloader_stage2
behavioral1/memory/2776-20-0x0000000000400000-0x0000000000638000-memory.dmp	modiloader_stage2
behavioral1/memory/2492-21-0x0000000000400000-0x00000000005DF000-memory.dmp	modiloader_stage2
behavioral1/memory/2288-65-0x0000000000400000-0x00000000005DF000-memory.dmp	modiloader_stage2
behavioral1/memory/2492-83-0x0000000000400000-0x00000000005DF000-memory.dmp	modiloader_stage2

Disables RegEdit via registry modification 1 IoCs

evasion

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Policies\system\DisableRegistryTools = "1"	BiFrOsT.exe

Disables Task Manager via registry modification
evasion

Executes dropped EXE 4 IoCs

pid	Process
2892	server.exe
2492	BiFrOsT.exe
2288	BiFrOsT.exe
1184	server.exe

Loads dropped DLL 10 IoCs

pid	Process
2776	JaffaCakes118_680e782739853d9ab89f2a6b929bda9c.exe
2776	JaffaCakes118_680e782739853d9ab89f2a6b929bda9c.exe
2776	JaffaCakes118_680e782739853d9ab89f2a6b929bda9c.exe
2776	JaffaCakes118_680e782739853d9ab89f2a6b929bda9c.exe
2492	BiFrOsT.exe
2892	server.exe
2544	WerFault.exe
2544	WerFault.exe
2544	WerFault.exe
2544	WerFault.exe

Windows security modification 2 TTPs 7 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UacDisableNotify = "1"	BiFrOsT.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\Svc	BiFrOsT.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	BiFrOsT.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	BiFrOsT.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	BiFrOsT.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallOverride = "1"	BiFrOsT.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	BiFrOsT.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

System Information Discovery

T1082

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	BiFrOsT.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2892 set thread context of 1184	2892	server.exe	33

UPX packed file 13 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2492-29-0x0000000002010000-0x000000000309E000-memory.dmp	upx
behavioral1/memory/2492-24-0x0000000002010000-0x000000000309E000-memory.dmp	upx
behavioral1/memory/2492-25-0x0000000002010000-0x000000000309E000-memory.dmp	upx
behavioral1/memory/2492-26-0x0000000002010000-0x000000000309E000-memory.dmp	upx
behavioral1/memory/2492-66-0x0000000002010000-0x000000000309E000-memory.dmp	upx
behavioral1/memory/2492-22-0x0000000002010000-0x000000000309E000-memory.dmp	upx
behavioral1/memory/2492-30-0x0000000002010000-0x000000000309E000-memory.dmp	upx
behavioral1/memory/2492-34-0x0000000002010000-0x000000000309E000-memory.dmp	upx
behavioral1/memory/2492-27-0x0000000002010000-0x000000000309E000-memory.dmp	upx
behavioral1/memory/2492-39-0x0000000002010000-0x000000000309E000-memory.dmp	upx
behavioral1/memory/2492-40-0x0000000002010000-0x000000000309E000-memory.dmp	upx
behavioral1/memory/2492-31-0x0000000002010000-0x000000000309E000-memory.dmp	upx
behavioral1/memory/2492-28-0x0000000002010000-0x000000000309E000-memory.dmp	upx

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SYSTEM.INI	BiFrOsT.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2544	2288	WerFault.exe	32

System Location Discovery: System Language Discovery 1 TTPs 4 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	BiFrOsT.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BiFrOsT.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_680e782739853d9ab89f2a6b929bda9c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	server.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2492	BiFrOsT.exe
1184	server.exe
1184	server.exe

Suspicious use of AdjustPrivilegeToken 22 IoCs

description	pid	Process
Token: SeDebugPrivilege	2492	BiFrOsT.exe
Token: SeDebugPrivilege	2492	BiFrOsT.exe
Token: SeDebugPrivilege	2492	BiFrOsT.exe
Token: SeDebugPrivilege	2492	BiFrOsT.exe
Token: SeDebugPrivilege	2492	BiFrOsT.exe
Token: SeDebugPrivilege	2492	BiFrOsT.exe
Token: SeDebugPrivilege	2492	BiFrOsT.exe
Token: SeDebugPrivilege	2492	BiFrOsT.exe
Token: SeDebugPrivilege	2492	BiFrOsT.exe
Token: SeDebugPrivilege	2492	BiFrOsT.exe
Token: SeDebugPrivilege	2492	BiFrOsT.exe
Token: SeDebugPrivilege	2492	BiFrOsT.exe
Token: SeDebugPrivilege	2492	BiFrOsT.exe
Token: SeDebugPrivilege	2492	BiFrOsT.exe
Token: SeDebugPrivilege	2492	BiFrOsT.exe
Token: SeDebugPrivilege	2492	BiFrOsT.exe
Token: SeDebugPrivilege	2492	BiFrOsT.exe
Token: SeDebugPrivilege	2492	BiFrOsT.exe
Token: SeDebugPrivilege	2492	BiFrOsT.exe
Token: SeDebugPrivilege	2492	BiFrOsT.exe
Token: SeDebugPrivilege	2492	BiFrOsT.exe
Token: SeDebugPrivilege	2492	BiFrOsT.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2892	server.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 2776 wrote to memory of 2892	2776	JaffaCakes118_680e782739853d9ab89f2a6b929bda9c.exe	30
PID 2776 wrote to memory of 2892	2776	JaffaCakes118_680e782739853d9ab89f2a6b929bda9c.exe	30
PID 2776 wrote to memory of 2892	2776	JaffaCakes118_680e782739853d9ab89f2a6b929bda9c.exe	30
PID 2776 wrote to memory of 2892	2776	JaffaCakes118_680e782739853d9ab89f2a6b929bda9c.exe	30
PID 2776 wrote to memory of 2492	2776	JaffaCakes118_680e782739853d9ab89f2a6b929bda9c.exe	31
PID 2776 wrote to memory of 2492	2776	JaffaCakes118_680e782739853d9ab89f2a6b929bda9c.exe	31
PID 2776 wrote to memory of 2492	2776	JaffaCakes118_680e782739853d9ab89f2a6b929bda9c.exe	31
PID 2776 wrote to memory of 2492	2776	JaffaCakes118_680e782739853d9ab89f2a6b929bda9c.exe	31
PID 2492 wrote to memory of 2288	2492	BiFrOsT.exe	32
PID 2492 wrote to memory of 2288	2492	BiFrOsT.exe	32
PID 2492 wrote to memory of 2288	2492	BiFrOsT.exe	32
PID 2492 wrote to memory of 2288	2492	BiFrOsT.exe	32
PID 2492 wrote to memory of 1096	2492	BiFrOsT.exe	19
PID 2492 wrote to memory of 1164	2492	BiFrOsT.exe	20
PID 2492 wrote to memory of 1212	2492	BiFrOsT.exe	21
PID 2492 wrote to memory of 1632	2492	BiFrOsT.exe	25
PID 2492 wrote to memory of 2892	2492	BiFrOsT.exe	30
PID 2492 wrote to memory of 2892	2492	BiFrOsT.exe	30
PID 2892 wrote to memory of 1184	2892	server.exe	33
PID 2892 wrote to memory of 1184	2892	server.exe	33
PID 2892 wrote to memory of 1184	2892	server.exe	33
PID 2892 wrote to memory of 1184	2892	server.exe	33
PID 2892 wrote to memory of 1184	2892	server.exe	33
PID 2892 wrote to memory of 1184	2892	server.exe	33
PID 2892 wrote to memory of 1184	2892	server.exe	33
PID 2892 wrote to memory of 1184	2892	server.exe	33
PID 2288 wrote to memory of 2544	2288	BiFrOsT.exe	34
PID 2288 wrote to memory of 2544	2288	BiFrOsT.exe	34
PID 2288 wrote to memory of 2544	2288	BiFrOsT.exe	34
PID 2288 wrote to memory of 2544	2288	BiFrOsT.exe	34
PID 1184 wrote to memory of 1212	1184	server.exe	21
PID 1184 wrote to memory of 1212	1184	server.exe	21
PID 1184 wrote to memory of 1212	1184	server.exe	21
PID 1184 wrote to memory of 1212	1184	server.exe	21

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	BiFrOsT.exe

C:\Windows\system32\taskhost.exe
"taskhost.exe"
1⤵
PID:1096

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1164

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1212
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_680e782739853d9ab89f2a6b929bda9c.exe
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_680e782739853d9ab89f2a6b929bda9c.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2776
- - C:\Users\Admin\AppData\Local\Temp\server.exe
    "C:\Users\Admin\AppData\Local\Temp\server.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2892
  - - C:\Users\Admin\AppData\Local\Temp\server.exe
      "C:\Users\Admin\AppData\Local\Temp\server.exe"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of WriteProcessMemory
      PID:1184
- - C:\Users\Admin\AppData\Local\Temp\BiFrOsT.exe
    "C:\Users\Admin\AppData\Local\Temp\BiFrOsT.exe"
    3⤵
    - Modifies firewall policy service
    - UAC bypass
    - Windows security bypass
    - Disables RegEdit via registry modification
    - Executes dropped EXE
    - Loads dropped DLL
    - Windows security modification
    - Checks whether UAC is enabled
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    - System policy modification
    PID:2492
  - - C:\Users\Admin\AppData\Local\Temp\BiFrOsT.exe
      "C:\Users\Admin\AppData\Local\Temp\BiFrOsT.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2288
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2288 -s 116
        5⤵
        Loads dropped DLL
        Program crash
        
        PID:2544

C:\Windows\system32\DllHost.exe
C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
1⤵
PID:1632

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Disable or Modify Tools

Modify Registry