modiloader | a8c548d911b046423496e93dde158ddb08dee59490e135b0940ae22ce6934ace

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"	Mon bifrost.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions = "0"	Mon bifrost.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "1"	Mon bifrost.exe

Sality
Sality is backdoor written in C++, first discovered in 2003.
backdoor 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"	Mon 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\UpdatesDisableNotify = "1"	Mon bifrost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UacDisableNotify = "1"	Mon bifrost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	Mon bifrost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	Mon bifrost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	Mon bifrost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallOverride = "1"	Mon bifrost.exe

ModiLoader Second Stage 7 IoCs

resource	yara_rule
behavioral1/memory/2372-3-0x0000000000400000-0x0000000000598000-memory.dmp	modiloader_stage2
behavioral1/memory/2372-4-0x0000000000400000-0x0000000000598000-memory.dmp	modiloader_stage2
behavioral1/memory/2372-5-0x0000000000400000-0x0000000000598000-memory.dmp	modiloader_stage2
behavioral1/memory/2372-7-0x0000000000400000-0x0000000000598000-memory.dmp	modiloader_stage2
behavioral1/files/0x0005000000010300-10.dat	modiloader_stage2
behavioral1/memory/2372-25-0x0000000000400000-0x0000000000598000-memory.dmp	modiloader_stage2
behavioral1/memory/2824-42-0x0000000000400000-0x0000000000586000-memory.dmp	modiloader_stage2

Deletes itself 1 IoCs

pid	Process
2972	Mon bifrost.exe

Executes dropped EXE 4 IoCs

pid	Process
2824	bifrost.exe
2828	7arboucha.exe
2972	Mon bifrost.exe
2392	7arboucha.exe

Loads dropped DLL 7 IoCs

pid	Process
2372	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe
2372	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe
2372	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe
2372	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe
2824	bifrost.exe
2824	bifrost.exe
2828	7arboucha.exe

UPX packed file 18 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2972-54-0x0000000001FB0000-0x000000000303E000-memory.dmp	upx
behavioral1/memory/2972-53-0x0000000001FB0000-0x000000000303E000-memory.dmp	upx
behavioral1/memory/2972-49-0x0000000001FB0000-0x000000000303E000-memory.dmp	upx
behavioral1/memory/2972-55-0x0000000001FB0000-0x000000000303E000-memory.dmp	upx
behavioral1/memory/2972-52-0x0000000001FB0000-0x000000000303E000-memory.dmp	upx
behavioral1/memory/2972-80-0x0000000001FB0000-0x000000000303E000-memory.dmp	upx
behavioral1/memory/2972-51-0x0000000001FB0000-0x000000000303E000-memory.dmp	upx
behavioral1/memory/2972-79-0x0000000001FB0000-0x000000000303E000-memory.dmp	upx
behavioral1/memory/2972-78-0x0000000001FB0000-0x000000000303E000-memory.dmp	upx
behavioral1/memory/2972-82-0x0000000001FB0000-0x000000000303E000-memory.dmp	upx
behavioral1/memory/2972-81-0x0000000001FB0000-0x000000000303E000-memory.dmp	upx
behavioral1/memory/2972-83-0x0000000001FB0000-0x000000000303E000-memory.dmp	upx
behavioral1/memory/2972-85-0x0000000001FB0000-0x000000000303E000-memory.dmp	upx
behavioral1/memory/2972-86-0x0000000001FB0000-0x000000000303E000-memory.dmp	upx
behavioral1/memory/2972-105-0x0000000001FB0000-0x000000000303E000-memory.dmp	upx
behavioral1/memory/2972-106-0x0000000001FB0000-0x000000000303E000-memory.dmp	upx
behavioral1/memory/2972-107-0x0000000001FB0000-0x000000000303E000-memory.dmp	upx
behavioral1/memory/2972-108-0x0000000001FB0000-0x000000000303E000-memory.dmp	upx

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

Enumerates connected drives 3 TTPs 21 IoCs

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

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\Z:	Mon bifrost.exe
File opened (read-only)	\??\I:	Mon bifrost.exe
File opened (read-only)	\??\J:	Mon bifrost.exe
File opened (read-only)	\??\L:	Mon bifrost.exe
File opened (read-only)	\??\S:	Mon bifrost.exe
File opened (read-only)	\??\Y:	Mon bifrost.exe
File opened (read-only)	\??\N:	Mon bifrost.exe
File opened (read-only)	\??\Q:	Mon bifrost.exe
File opened (read-only)	\??\U:	Mon bifrost.exe
File opened (read-only)	\??\W:	Mon bifrost.exe
File opened (read-only)	\??\X:	Mon bifrost.exe
File opened (read-only)	\??\G:	Mon bifrost.exe
File opened (read-only)	\??\P:	Mon bifrost.exe
File opened (read-only)	\??\R:	Mon bifrost.exe
File opened (read-only)	\??\T:	Mon bifrost.exe
File opened (read-only)	\??\V:	Mon bifrost.exe
File opened (read-only)	\??\E:	Mon bifrost.exe
File opened (read-only)	\??\H:	Mon bifrost.exe
File opened (read-only)	\??\K:	Mon bifrost.exe
File opened (read-only)	\??\M:	Mon bifrost.exe
File opened (read-only)	\??\O:	Mon bifrost.exe

Drops autorun.inf file 1 TTPs 2 IoCs

Malware can abuse Windows Autorun to spread further via attached volumes.

Replication Through Removable Media

T1091

description	ioc	Process
File opened for modification	C:\autorun.inf	Mon bifrost.exe
File opened for modification	F:\autorun.inf	Mon bifrost.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1868 set thread context of 2372	1868	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe	30
PID 2828 set thread context of 2392	2828	7arboucha.exe	34

Drops file in Program Files directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\BCSSync.exe	Mon bifrost.exe
File opened for modification	C:\PROGRAM FILES\7-ZIP\7z.exe	Mon bifrost.exe
File opened for modification	C:\PROGRAM FILES\7-ZIP\7zFM.exe	Mon bifrost.exe
File opened for modification	C:\PROGRAM FILES\7-ZIP\7zG.exe	Mon bifrost.exe
File opened for modification	C:\PROGRAM FILES\7-ZIP\Uninstall.exe	Mon bifrost.exe

Drops file in Windows directory 1 IoCs

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

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 6 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	7arboucha.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Mon bifrost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	7arboucha.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
2972	Mon bifrost.exe
2392	7arboucha.exe
2392	7arboucha.exe
2972	Mon bifrost.exe
2972	Mon bifrost.exe
2972	Mon bifrost.exe
2972	Mon bifrost.exe
2972	Mon bifrost.exe
2972	Mon bifrost.exe
2972	Mon bifrost.exe
2972	Mon bifrost.exe
2972	Mon bifrost.exe
2972	Mon bifrost.exe
2972	Mon bifrost.exe
2972	Mon bifrost.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	1868	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe
Token: 33	1868	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe
Token: SeIncBasePriorityPrivilege	1868	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe
Token: SeDebugPrivilege	2972	Mon bifrost.exe
Token: SeDebugPrivilege	2972	Mon bifrost.exe
Token: SeDebugPrivilege	2972	Mon bifrost.exe
Token: SeDebugPrivilege	2972	Mon bifrost.exe
Token: SeDebugPrivilege	2972	Mon bifrost.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
2828	7arboucha.exe
2828	7arboucha.exe
2972	Mon bifrost.exe
2972	Mon bifrost.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1868 wrote to memory of 2372	1868	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe	30
PID 1868 wrote to memory of 2372	1868	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe	30
PID 1868 wrote to memory of 2372	1868	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe	30
PID 1868 wrote to memory of 2372	1868	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe	30
PID 1868 wrote to memory of 2372	1868	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe	30
PID 1868 wrote to memory of 2372	1868	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe	30
PID 1868 wrote to memory of 2372	1868	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe	30
PID 1868 wrote to memory of 2372	1868	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe	30
PID 1868 wrote to memory of 2372	1868	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe	30
PID 1868 wrote to memory of 2372	1868	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe	30
PID 1868 wrote to memory of 2372	1868	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe	30
PID 1868 wrote to memory of 2372	1868	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe	30
PID 1868 wrote to memory of 2372	1868	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe	30
PID 1868 wrote to memory of 2372	1868	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe	30
PID 2372 wrote to memory of 2824	2372	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe	31
PID 2372 wrote to memory of 2824	2372	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe	31
PID 2372 wrote to memory of 2824	2372	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe	31
PID 2372 wrote to memory of 2824	2372	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe	31
PID 2372 wrote to memory of 2828	2372	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe	32
PID 2372 wrote to memory of 2828	2372	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe	32
PID 2372 wrote to memory of 2828	2372	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe	32
PID 2372 wrote to memory of 2828	2372	890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe	32
PID 2824 wrote to memory of 2972	2824	bifrost.exe	33
PID 2824 wrote to memory of 2972	2824	bifrost.exe	33
PID 2824 wrote to memory of 2972	2824	bifrost.exe	33
PID 2824 wrote to memory of 2972	2824	bifrost.exe	33
PID 2828 wrote to memory of 2392	2828	7arboucha.exe	34
PID 2828 wrote to memory of 2392	2828	7arboucha.exe	34
PID 2828 wrote to memory of 2392	2828	7arboucha.exe	34
PID 2828 wrote to memory of 2392	2828	7arboucha.exe	34
PID 2828 wrote to memory of 2392	2828	7arboucha.exe	34
PID 2828 wrote to memory of 2392	2828	7arboucha.exe	34
PID 2828 wrote to memory of 2392	2828	7arboucha.exe	34
PID 2828 wrote to memory of 2392	2828	7arboucha.exe	34
PID 2972 wrote to memory of 1116	2972	Mon bifrost.exe	19
PID 2972 wrote to memory of 1172	2972	Mon bifrost.exe	20
PID 2972 wrote to memory of 1196	2972	Mon bifrost.exe	21
PID 2972 wrote to memory of 1192	2972	Mon bifrost.exe	25
PID 2972 wrote to memory of 2392	2972	Mon bifrost.exe	34
PID 2972 wrote to memory of 2392	2972	Mon bifrost.exe	34
PID 2392 wrote to memory of 1196	2392	7arboucha.exe	21
PID 2392 wrote to memory of 1196	2392	7arboucha.exe	21
PID 2392 wrote to memory of 1196	2392	7arboucha.exe	21
PID 2392 wrote to memory of 1196	2392	7arboucha.exe	21
PID 2972 wrote to memory of 1116	2972	Mon bifrost.exe	19
PID 2972 wrote to memory of 1172	2972	Mon bifrost.exe	20
PID 2972 wrote to memory of 1196	2972	Mon bifrost.exe	21
PID 2972 wrote to memory of 1192	2972	Mon bifrost.exe	25
PID 2972 wrote to memory of 1116	2972	Mon bifrost.exe	19
PID 2972 wrote to memory of 1172	2972	Mon bifrost.exe	20
PID 2972 wrote to memory of 1196	2972	Mon bifrost.exe	21
PID 2972 wrote to memory of 1192	2972	Mon bifrost.exe	25
PID 2972 wrote to memory of 1116	2972	Mon bifrost.exe	19
PID 2972 wrote to memory of 1172	2972	Mon bifrost.exe	20
PID 2972 wrote to memory of 1196	2972	Mon bifrost.exe	21
PID 2972 wrote to memory of 1192	2972	Mon bifrost.exe	25
PID 2972 wrote to memory of 1116	2972	Mon bifrost.exe	19
PID 2972 wrote to memory of 1172	2972	Mon bifrost.exe	20
PID 2972 wrote to memory of 1196	2972	Mon bifrost.exe	21
PID 2972 wrote to memory of 1192	2972	Mon bifrost.exe	25
PID 2972 wrote to memory of 1116	2972	Mon bifrost.exe	19
PID 2972 wrote to memory of 1172	2972	Mon bifrost.exe	20
PID 2972 wrote to memory of 1196	2972	Mon bifrost.exe	21
PID 2972 wrote to memory of 1192	2972	Mon bifrost.exe	25

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"	Mon bifrost.exe

C:\Windows\system32\taskhost.exe
"taskhost.exe"
1⤵
PID:1116

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1172

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1196
- C:\Users\Admin\AppData\Local\Temp\890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1868
- - C:\Users\Admin\AppData\Local\Temp\890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\890c6288af1b4e9d66963d946968ce4c_JaffaCakes118.exe"
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2372
  - - C:\Users\Admin\AppData\Local\Temp\bifrost.exe
      "C:\Users\Admin\AppData\Local\Temp\bifrost.exe"
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2824
    - - C:\Users\Admin\AppData\Local\Temp\Mon bifrost.exe
        
        "C:\Users\Admin\AppData\Local\Temp\Mon bifrost.exe"
        5⤵
        Modifies firewall policy service
        UAC bypass
        Windows security bypass
        Deletes itself
        Executes dropped EXE
        Windows security modification
        Checks whether UAC is enabled
        Enumerates connected drives
        Drops autorun.inf file
        Drops file in Program Files directory
        Drops file in Windows directory
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        System policy modification
        
        PID:2972
  - - C:\Users\Admin\AppData\Local\Temp\7arboucha.exe
      "C:\Users\Admin\AppData\Local\Temp\7arboucha.exe"
      4⤵
      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:2828
    - - C:\Users\Admin\AppData\Local\Temp\7arboucha.exe
        
        "C:\Users\Admin\AppData\Local\Temp\7arboucha.exe"
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of WriteProcessMemory
        
        PID:2392

C:\Windows\system32\DllHost.exe
C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
1⤵
PID:1192

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Replication Through Removable Media

T1091

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