c858e10e29b769ca86445ba1bebdf708e88245da4e96c4afc967818e8293e099

Analysis

max time kernel
1799s
max time network
1799s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
07-12-2024 18:43

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General

Target

k5.exe
Size

76KB
MD5

145c9edca1151d477e5c339b6d797cbd
SHA1

f09d773d50f87c47500305e79bc1e6fcf503ebd6
SHA256

ed989d9d7e04a312dffe2fdd8dd30273d5b07ee56941f1a724b6143752ef42da
SHA512

10f5d6cacbbc96fa22c097f5b519fe1738a5531820518af00cedf8ca9112808bc2c2871845f85f496a1d08695441262ab3ed57068e6d029ec1e5aabdb32d47df
SSDEEP

1536:bcPk2vG+Yq6GrXdOOq52m0HLxEulgsteEY+cZv8FYOicNx1q/6:v2vGM6GLdu52hHL6ulgsteEY+cZ90Nx1

Score

10^/10

discovery evasion

Malware Config

Signatures

Modifies firewall policy service 3 TTPs 4 IoCs

evasion

Modify Registry

T1112

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

description	ioc	Process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List	k5.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	k5.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications	k5.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Users\Admin\AppData\Local\Temp\k5.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\k5.exe:*:enabled:@shell32.dll,-1"	k5.exe

Modifies RDP port number used by Windows 1 TTPs

Remote Desktop Protocol
T1021.001

Executes dropped EXE 1 IoCs

pid	Process
3780	nslfoo.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\nslfoo.exe	k5.exe
File opened for modification	C:\Windows\nslfoo.exe	k5.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3244	1408	WerFault.exe	77

System Location Discovery: System Language Discovery 1 TTPs 2 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	k5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nslfoo.exe

Checks processor information in registry 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	nslfoo.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	nslfoo.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	nslfoo.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1408	k5.exe
1408	k5.exe
3780	nslfoo.exe
3780	nslfoo.exe

Suspicious behavior: MapViewOfSection 64 IoCs

pid	Process
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe
1408	k5.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1408	k5.exe
Token: SeDebugPrivilege	3780	nslfoo.exe
Token: SeIncBasePriorityPrivilege	1408	k5.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1408 wrote to memory of 632	1408	k5.exe	5
PID 1408 wrote to memory of 632	1408	k5.exe	5
PID 1408 wrote to memory of 632	1408	k5.exe	5
PID 1408 wrote to memory of 632	1408	k5.exe	5
PID 1408 wrote to memory of 632	1408	k5.exe	5
PID 1408 wrote to memory of 632	1408	k5.exe	5
PID 1408 wrote to memory of 696	1408	k5.exe	7
PID 1408 wrote to memory of 696	1408	k5.exe	7
PID 1408 wrote to memory of 696	1408	k5.exe	7
PID 1408 wrote to memory of 696	1408	k5.exe	7
PID 1408 wrote to memory of 696	1408	k5.exe	7
PID 1408 wrote to memory of 696	1408	k5.exe	7
PID 1408 wrote to memory of 816	1408	k5.exe	8
PID 1408 wrote to memory of 816	1408	k5.exe	8
PID 1408 wrote to memory of 816	1408	k5.exe	8
PID 1408 wrote to memory of 816	1408	k5.exe	8
PID 1408 wrote to memory of 816	1408	k5.exe	8
PID 1408 wrote to memory of 816	1408	k5.exe	8
PID 1408 wrote to memory of 832	1408	k5.exe	9
PID 1408 wrote to memory of 832	1408	k5.exe	9
PID 1408 wrote to memory of 832	1408	k5.exe	9
PID 1408 wrote to memory of 832	1408	k5.exe	9
PID 1408 wrote to memory of 832	1408	k5.exe	9
PID 1408 wrote to memory of 832	1408	k5.exe	9
PID 1408 wrote to memory of 828	1408	k5.exe	10
PID 1408 wrote to memory of 828	1408	k5.exe	10
PID 1408 wrote to memory of 828	1408	k5.exe	10
PID 1408 wrote to memory of 828	1408	k5.exe	10
PID 1408 wrote to memory of 828	1408	k5.exe	10
PID 1408 wrote to memory of 828	1408	k5.exe	10
PID 1408 wrote to memory of 944	1408	k5.exe	11
PID 1408 wrote to memory of 944	1408	k5.exe	11
PID 1408 wrote to memory of 944	1408	k5.exe	11
PID 1408 wrote to memory of 944	1408	k5.exe	11
PID 1408 wrote to memory of 944	1408	k5.exe	11
PID 1408 wrote to memory of 944	1408	k5.exe	11
PID 1408 wrote to memory of 1008	1408	k5.exe	12
PID 1408 wrote to memory of 1008	1408	k5.exe	12
PID 1408 wrote to memory of 1008	1408	k5.exe	12
PID 1408 wrote to memory of 1008	1408	k5.exe	12
PID 1408 wrote to memory of 1008	1408	k5.exe	12
PID 1408 wrote to memory of 1008	1408	k5.exe	12
PID 1408 wrote to memory of 556	1408	k5.exe	13
PID 1408 wrote to memory of 556	1408	k5.exe	13
PID 1408 wrote to memory of 556	1408	k5.exe	13
PID 1408 wrote to memory of 556	1408	k5.exe	13
PID 1408 wrote to memory of 556	1408	k5.exe	13
PID 1408 wrote to memory of 556	1408	k5.exe	13
PID 1408 wrote to memory of 756	1408	k5.exe	14
PID 1408 wrote to memory of 756	1408	k5.exe	14
PID 1408 wrote to memory of 756	1408	k5.exe	14
PID 1408 wrote to memory of 756	1408	k5.exe	14
PID 1408 wrote to memory of 756	1408	k5.exe	14
PID 1408 wrote to memory of 756	1408	k5.exe	14
PID 1408 wrote to memory of 868	1408	k5.exe	15
PID 1408 wrote to memory of 868	1408	k5.exe	15
PID 1408 wrote to memory of 868	1408	k5.exe	15
PID 1408 wrote to memory of 868	1408	k5.exe	15
PID 1408 wrote to memory of 868	1408	k5.exe	15
PID 1408 wrote to memory of 868	1408	k5.exe	15
PID 1408 wrote to memory of 1056	1408	k5.exe	16
PID 1408 wrote to memory of 1056	1408	k5.exe	16
PID 1408 wrote to memory of 1056	1408	k5.exe	16
PID 1408 wrote to memory of 1056	1408	k5.exe	16

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:632
- C:\Windows\system32\fontdrvhost.exe
  "fontdrvhost.exe"
  2⤵
  PID:828
- C:\Windows\system32\dwm.exe
  "dwm.exe"
  2⤵
  PID:556

C:\Windows\system32\lsass.exe
C:\Windows\system32\lsass.exe
1⤵
PID:696

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k DcomLaunch -p
1⤵
PID:816
- C:\Windows\system32\wbem\unsecapp.exe
  C:\Windows\system32\wbem\unsecapp.exe -Embedding
  2⤵
  PID:3116
- C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe
  "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe" -ServerName:CortanaUI.AppXstmwaab17q5s3y22tp6apqz7a45vwv65.mca
  2⤵
  PID:3856
- C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
  "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
  2⤵
  PID:3900
- C:\Windows\System32\RuntimeBroker.exe
  C:\Windows\System32\RuntimeBroker.exe -Embedding
  2⤵
  PID:3960
- C:\Windows\System32\RuntimeBroker.exe
  C:\Windows\System32\RuntimeBroker.exe -Embedding
  2⤵
  PID:4080
- C:\Windows\system32\DllHost.exe
  C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
  2⤵
  PID:4104
- C:\Windows\system32\DllHost.exe
  C:\Windows\system32\DllHost.exe /Processid:{973D20D7-562D-44B9-B70B-5A0F49CCDF3F}
  2⤵
  PID:4392
- C:\Windows\system32\SppExtComObj.exe
  C:\Windows\system32\SppExtComObj.exe -Embedding
  2⤵
  PID:1928
- C:\Windows\system32\DllHost.exe
  C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
  2⤵
  PID:3104

C:\Windows\system32\fontdrvhost.exe
"fontdrvhost.exe"
1⤵
PID:832

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k RPCSS -p
1⤵
PID:944

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k DcomLaunch -p -s LSM
1⤵
PID:1008

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s gpsvc
1⤵
PID:756

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p -s lmhosts
1⤵
PID:868

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s NcbService
1⤵
PID:1056

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p -s TimeBrokerSvc
1⤵
PID:1112

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s Schedule
1⤵
PID:1180

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalServiceNoNetwork -p
1⤵
PID:1196

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalService -p -s nsi
1⤵
PID:1216

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k netprofm -p -s netprofm
1⤵
PID:1332

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p -s EventLog
1⤵
PID:1364

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s ProfSvc
1⤵
PID:1396

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalService -p -s DispBrokerDesktopSvc
1⤵
PID:1420

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalService -p -s EventSystem
1⤵
PID:1468

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k netsvcs -p -s Themes
1⤵
PID:1480

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s UserManager
1⤵
PID:1532
- C:\Windows\system32\sihost.exe
  sihost.exe
  2⤵
  PID:2884

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s SENS
1⤵
PID:1660

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s AudioEndpointBuilder
1⤵
PID:1748

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k NetworkService -p
1⤵
PID:1776

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p
1⤵
PID:1832

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p -s Dhcp
1⤵
PID:1880

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k appmodel -p -s StateRepository
1⤵
PID:2004

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p
1⤵
PID:2016

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p
1⤵
PID:2036

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k netsvcs -p -s ShellHWDetection
1⤵
PID:2056

C:\Windows\System32\spoolsv.exe
C:\Windows\System32\spoolsv.exe
1⤵
PID:2196

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalServiceNoNetworkFirewall -p
1⤵
PID:2248

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k NetworkService -p -s LanmanWorkstation
1⤵
PID:2328

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -s RmSvc
1⤵
PID:2352

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k NetworkServiceNetworkRestricted -p -s PolicyAgent
1⤵
PID:2532

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s IKEEXT
1⤵
PID:2540

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k NetworkService -p
1⤵
PID:2584

C:\Windows\sysmon.exe
C:\Windows\sysmon.exe
1⤵
PID:2672

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s LanmanServer
1⤵
PID:2688

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s TrkWks
1⤵
PID:2704

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s Winmgmt
1⤵
PID:2744

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s WpnService
1⤵
PID:2756

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k UnistackSvcGroup -s CDPUserSvc
1⤵
PID:3040

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3380
- C:\Users\Admin\AppData\Local\Temp\k5.exe
  "C:\Users\Admin\AppData\Local\Temp\k5.exe"
  2⤵
  - Modifies firewall policy service
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1408
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1408 -s 1392
    3⤵
    - Program crash
    PID:3244

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p -s cbdhsvc
1⤵
PID:3536

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s Appinfo
1⤵
PID:3572

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k UdkSvcGroup -s UdkUserSvc
1⤵
PID:4064

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k osprivacy -p -s camsvc
1⤵
PID:4536

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalService -p -s CDPSvc
1⤵
PID:2460

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s StorSvc
1⤵
PID:4348

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p -s WinHttpAutoProxySvc
1⤵
PID:3260

C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeClickToRun.exe
"C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeClickToRun.exe" /service
1⤵
PID:644

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k LocalService -p -s LicenseManager
1⤵
PID:2264

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s wlidsvc
1⤵
PID:2412

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p -s NgcCtnrSvc
1⤵
PID:5012

C:\Windows\nslfoo.exe
C:\Windows\nslfoo.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3780

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 352 -p 1408 -ip 1408
1⤵
PID:1900

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

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Remote Services

T1021

Remote Desktop Protocol

T1021.001

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\nslfoo.exe

Filesize
76KB

MD5
145c9edca1151d477e5c339b6d797cbd

SHA1
f09d773d50f87c47500305e79bc1e6fcf503ebd6

SHA256
ed989d9d7e04a312dffe2fdd8dd30273d5b07ee56941f1a724b6143752ef42da

SHA512
10f5d6cacbbc96fa22c097f5b519fe1738a5531820518af00cedf8ca9112808bc2c2871845f85f496a1d08695441262ab3ed57068e6d029ec1e5aabdb32d47df

Download Submit
memory/1408-4-0x000000007FE70000-0x000000007FE7C000-memory.dmp

Filesize
48KB

Download
memory/1408-1-0x000000007FE70000-0x000000007FE7C000-memory.dmp

Filesize
48KB

Download
memory/1408-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1408-3-0x0000000077A45000-0x0000000077A46000-memory.dmp

Filesize
4KB

Download
memory/1408-5-0x000000007FE70000-0x000000007FE7C000-memory.dmp

Filesize
48KB

Download
memory/1408-2-0x0000000077A44000-0x0000000077A45000-memory.dmp

Filesize
4KB

Download
memory/1408-11-0x000000007FE60000-0x000000007FE6C000-memory.dmp

Filesize
48KB

Download
memory/1408-10-0x000000007FE60000-0x000000007FE6C000-memory.dmp

Filesize
48KB

Download
memory/1408-9-0x000000007FE60000-0x000000007FE6C000-memory.dmp

Filesize
48KB

Download
memory/1408-15-0x000000007FE70000-0x000000007FE7C000-memory.dmp

Filesize
48KB

Download
memory/1408-12-0x000000007FE60000-0x000000007FE6C000-memory.dmp

Filesize
48KB

Download
memory/1408-18-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3780-19-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download