565d7fe44800a4f2af5d1690ed669b6cc43915ec642baa1466293bf31f059f28

Analysis

max time kernel
150s
max time network
131s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
18/10/2026, 22:13

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General

Target
ScreenMarkup-Setup.exe
Size 7.1MB
Sample261018-145ldscg95
SHA256 565d7fe44800a4f2af5d1690ed669b6cc43915ec642baa1466293bf31f059f28
MD5 77c0dcee328b0e09947843cd64d5883f
SHA1 ef959b827b194aa20e5a354c6b5a0a2fdbcc14c8
SHA512 4282a166bcdbc189ccb92b19c35b7f57271c086c5027be2fd47b642b72c34291216a1a789b56196013b836c831886fa3357f233c645ec088e5bdf264afba700a
SSDEEP 49152:Bom8erqzX1NAXrRzpw0Xw84Ggo+bpJYZ8mZDTUuQPrjCWOTNM9nNZw084POKyQs+:satzpw5dGv+kZJp0C4HrOgsJbm2q70E
TLSH
T1B3766C12BA8B99ACD05BC470834686236A2174CB0B35A9FF45C856393FA9FF05F3C759
MD5 SHA1 SHA512 SSDEEP TLSH

Score

8^/10

defense_evasion execution

Malware Config

Signatures

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4128	powershell.exe
2996	powershell.exe
244	powershell.exe

Executes dropped EXE 1 IoCs

pid	Process
3984	ScreenMarkup.exe

Kills process with taskkill 2 IoCs

defense_evasion

pid	Process
1536	taskkill.exe
6092	taskkill.exe

Modifies registry key 1 TTPs 12 IoCs

Modify Registry

T1112

pid	Process
4840	reg.exe
5536	reg.exe
2448	reg.exe
488	reg.exe
3284	reg.exe
3240	reg.exe
5800	reg.exe
4268	reg.exe
2244	reg.exe
1368	reg.exe
2524	reg.exe
1412	reg.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4128	powershell.exe
4128	powershell.exe
2996	powershell.exe
2996	powershell.exe
244	powershell.exe
244	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1536	taskkill.exe
Token: SeDebugPrivilege	4128	powershell.exe
Token: SeDebugPrivilege	6092	taskkill.exe
Token: SeDebugPrivilege	2996	powershell.exe
Token: SeDebugPrivilege	244	powershell.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3984	ScreenMarkup.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 4784 wrote to memory of 1536	4784	ScreenMarkup-Setup.exe	89
PID 4784 wrote to memory of 4128	4784	ScreenMarkup-Setup.exe	92
PID 4784 wrote to memory of 3240	4784	ScreenMarkup-Setup.exe	94
PID 4784 wrote to memory of 6092	4784	ScreenMarkup-Setup.exe	96
PID 4784 wrote to memory of 2996	4784	ScreenMarkup-Setup.exe	98
PID 4784 wrote to memory of 244	4784	ScreenMarkup-Setup.exe	100
PID 4784 wrote to memory of 5800	4784	ScreenMarkup-Setup.exe	102
PID 4784 wrote to memory of 4268	4784	ScreenMarkup-Setup.exe	104
PID 4784 wrote to memory of 5536	4784	ScreenMarkup-Setup.exe	106
PID 4784 wrote to memory of 2448	4784	ScreenMarkup-Setup.exe	108
PID 4784 wrote to memory of 2244	4784	ScreenMarkup-Setup.exe	110
PID 4784 wrote to memory of 1368	4784	ScreenMarkup-Setup.exe	112
PID 4784 wrote to memory of 2524	4784	ScreenMarkup-Setup.exe	114
PID 4784 wrote to memory of 1412	4784	ScreenMarkup-Setup.exe	116
PID 4784 wrote to memory of 4840	4784	ScreenMarkup-Setup.exe	118
PID 4784 wrote to memory of 488	4784	ScreenMarkup-Setup.exe	120
PID 4784 wrote to memory of 3284	4784	ScreenMarkup-Setup.exe	122
PID 4784 wrote to memory of 3984	4784	ScreenMarkup-Setup.exe	124

C:\Users\Admin\AppData\Local\Temp\ScreenMarkup-Setup.exe
"C:\Users\Admin\AppData\Local\Temp\ScreenMarkup-Setup.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4784
- C:\Windows\system32\taskkill.exe
  "taskkill" /IM Scribble.exe /F
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:1536
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell" -NoProfile -NonInteractive -WindowStyle Hidden -Command "Remove-Item -Force -ErrorAction SilentlyContinue (Join-Path ([Environment]::GetFolderPath('Programs')) 'Scribble.lnk'), (Join-Path ([Environment]::GetFolderPath('Desktop')) 'Scribble.lnk')"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4128
- C:\Windows\system32\reg.exe
  "reg" delete HKCU\Software\Microsoft\Windows\CurrentVersion\Uninstall\Scribble /f
  2⤵
  - Modifies registry key
  PID:3240
- C:\Windows\system32\taskkill.exe
  "taskkill" /IM ScreenMarkup.exe /F
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:6092
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell" -NoProfile -NonInteractive -WindowStyle Hidden -Command "$d = [Environment]::GetFolderPath('Programs'); $s = (New-Object -ComObject WScript.Shell).CreateShortcut((Join-Path $d 'Screen Markup.lnk')); $s.TargetPath = 'C:\Users\Admin\AppData\Local\Programs\Screen Markup\ScreenMarkup.exe'; $s.IconLocation = 'C:\Users\Admin\AppData\Local\Programs\Screen Markup\ScreenMarkup.ico'; $s.WorkingDirectory = 'C:\Users\Admin\AppData\Local\Programs\Screen Markup'; $s.Description = 'Draw on this PC from your phone or tablet'; $s.Save()"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2996
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell" -NoProfile -NonInteractive -WindowStyle Hidden -Command "$d = [Environment]::GetFolderPath('Desktop'); $s = (New-Object -ComObject WScript.Shell).CreateShortcut((Join-Path $d 'Screen Markup.lnk')); $s.TargetPath = 'C:\Users\Admin\AppData\Local\Programs\Screen Markup\ScreenMarkup.exe'; $s.IconLocation = 'C:\Users\Admin\AppData\Local\Programs\Screen Markup\ScreenMarkup.ico'; $s.WorkingDirectory = 'C:\Users\Admin\AppData\Local\Programs\Screen Markup'; $s.Description = 'Draw on this PC from your phone or tablet'; $s.Save()"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:244
- C:\Windows\system32\reg.exe
  "reg" add HKCU\Software\Microsoft\Windows\CurrentVersion\Uninstall\ScreenMarkup /v DisplayName /t REG_SZ /d "Screen Markup" /f
  2⤵
  - Modifies registry key
  PID:5800
- C:\Windows\system32\reg.exe
  "reg" add HKCU\Software\Microsoft\Windows\CurrentVersion\Uninstall\ScreenMarkup /v DisplayVersion /t REG_SZ /d 0.3.5 /f
  2⤵
  - Modifies registry key
  PID:4268
- C:\Windows\system32\reg.exe
  "reg" add HKCU\Software\Microsoft\Windows\CurrentVersion\Uninstall\ScreenMarkup /v Publisher /t REG_SZ /d "RSW Digital Ltd" /f
  2⤵
  - Modifies registry key
  PID:5536
- C:\Windows\system32\reg.exe
  "reg" add HKCU\Software\Microsoft\Windows\CurrentVersion\Uninstall\ScreenMarkup /v InstallLocation /t REG_SZ /d "C:\Users\Admin\AppData\Local\Programs\Screen Markup" /f
  2⤵
  - Modifies registry key
  PID:2448
- C:\Windows\system32\reg.exe
  "reg" add HKCU\Software\Microsoft\Windows\CurrentVersion\Uninstall\ScreenMarkup /v DisplayIcon /t REG_SZ /d "C:\Users\Admin\AppData\Local\Programs\Screen Markup\ScreenMarkup.ico" /f
  2⤵
  - Modifies registry key
  PID:2244
- C:\Windows\system32\reg.exe
  "reg" add HKCU\Software\Microsoft\Windows\CurrentVersion\Uninstall\ScreenMarkup /v UninstallString /t REG_SZ /d "\"C:\Users\Admin\AppData\Local\Programs\Screen Markup\Uninstall.exe\" --uninstall" /f
  2⤵
  - Modifies registry key
  PID:1368
- C:\Windows\system32\reg.exe
  "reg" add HKCU\Software\Microsoft\Windows\CurrentVersion\Uninstall\ScreenMarkup /v QuietUninstallString /t REG_SZ /d "\"C:\Users\Admin\AppData\Local\Programs\Screen Markup\Uninstall.exe\" --uninstall /S" /f
  2⤵
  - Modifies registry key
  PID:2524
- C:\Windows\system32\reg.exe
  "reg" add HKCU\Software\Microsoft\Windows\CurrentVersion\Uninstall\ScreenMarkup /v URLInfoAbout /t REG_SZ /d https://screenmarkup.com /f
  2⤵
  - Modifies registry key
  PID:1412
- C:\Windows\system32\reg.exe
  "reg" add HKCU\Software\Microsoft\Windows\CurrentVersion\Uninstall\ScreenMarkup /v NoModify /t REG_DWORD /d 1 /f
  2⤵
  - Modifies registry key
  PID:4840
- C:\Windows\system32\reg.exe
  "reg" add HKCU\Software\Microsoft\Windows\CurrentVersion\Uninstall\ScreenMarkup /v NoRepair /t REG_DWORD /d 1 /f
  2⤵
  - Modifies registry key
  PID:488
- C:\Windows\system32\reg.exe
  "reg" add HKCU\Software\Microsoft\Windows\CurrentVersion\Uninstall\ScreenMarkup /v EstimatedSize /t REG_DWORD /d 13916 /f
  2⤵
  - Modifies registry key
  PID:3284
- C:\Users\Admin\AppData\Local\Programs\Screen Markup\ScreenMarkup.exe
  "C:\Users\Admin\AppData\Local\Programs\Screen Markup\ScreenMarkup.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of FindShellTrayWindow
  PID:3984

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 60292489db6d4ba2a3e4448639fbe7fa2261be477f63ef09bca0b55e520a4777
MD5 9db254dd0cf5e2b1153ff5cde0ed8885
SHA1 de97945a57babdd2498693fbb2b3d8bc548da209
SHA512 a86e71b1b09215d626067d2fab0d7111a5718937c4097b826e77402d32aa3bf64d73a8886104f7b0ae434dcafb9abab4d04d2c053cb65510d611c069d04f7011
TLSH
T19A115733B3CC8624C89A413650CEAC1036B587DB519ECE6BBB84D154B43F59ADE61260
MD5 SHA1 SHA512 TLSH

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 144598ea87965a833e5c847b0c3725dee5fd45304ea32c04cc6080f73f537503
MD5 d0d3fac03f88767610f5a99b8ef62534
SHA1 ea88be022253f1717dc92755386a6b006d8e1161
SHA512 22253d382bb8cd22a7219803e10bcc5d1c070aef98e01f99ac6589d6361d6571c45b89dd5ba1ff3ad4b1c8f01508873878aab9be1526b777a8ae574c3b86c57e
TLSH
T1C921AF37B3CC8714DC8A403A50CDAC1032B5C7D7409ECF6B7B84D544B42F599CE60150
MD5 SHA1 SHA512 TLSH

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ScreenMarkup.exe

Path C:\Users\Admin\AppData\Local\Programs\Screen Markup\ScreenMarkup.exe
Size 6.8MB
SHA256 ed44518a44700d72dc02d263db64ea8ddd0109a4ea731b1bc6188a45c8a8b613
MD5 5bb49e254853c5fd16b259152d5aefb2
SHA1 0ecd9e6573b881712d36fefc96306db803b2beac
SHA512 c3226a6a4cea831b62e276ef6d11b927c3ba27becdf4fa3106d8b691c21350bc4852bb91b2ba45099371749998f3c8a619c5a81962ea08cf4fb19180fdb8ae48
SSDEEP 49152:fqzX1NAXrRzpw0Xw84Ggo+bpJYZ8mZDTUuQPrjCWOTNM9nNZw084POKyQsToLLT/:Vtzpw5dGv+kZJp0C4HrOgsJbm2q7
TLSH
T168765C12B78B99ACD05BC470834686236A2174CB0B35A9FF45C856393FAAFF05F38759
MD5 SHA1 SHA512 SSDEEP TLSH

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__PSScriptPolicyTest_5verb0t3.mnk.psm1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5verb0t3.mnk.psm1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

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settings.json

Path C:\Users\Admin\AppData\Roaming\Scribble\settings.json
Size 352B
SHA256 fbefc2db279c17597a83ab20dd00299a2ce8cc38b29d93a7e182b32b0152e20e
MD5 b45234b23413b0a49a566ce81bbf9501
SHA1 b29f69842ec668194d56845dfdf5222bf582d54f
SHA512 a6aafa21161b920e35549d0de4ff96c422b9a4997f85fdf891f2b80f8f28d1aba7b36becef1cd73d7b9ed94931fff3f3038a3c3170dee9f6ce5aa933b222a6d5
TLSH
T1F4E026774E8500770DE889908CD7068F2B6C0E0B167E7D92AA57852819CF72324F24AC
MD5 SHA1 SHA512 TLSH

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memory/4128-5-0x00007FFECB8C0000-0x00007FFECC264000-memory.dmp

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memory/4128-8-0x00007FFECB8C0000-0x00007FFECC264000-memory.dmp

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memory/4128-11-0x00007FFECB8C0000-0x00007FFECC264000-memory.dmp

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memory/4128-10-0x00007FFECB8C0000-0x00007FFECC264000-memory.dmp

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memory/4128-7-0x00007FFECB8C0000-0x00007FFECC264000-memory.dmp

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memory/4128-6-0x00007FFECB8C0000-0x00007FFECC264000-memory.dmp

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memory/4128-0-0x00007FFECBA4F000-0x00007FFECBA50000-memory.dmp

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memory/4128-4-0x00007FFECB8C0000-0x00007FFECC264000-memory.dmp

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memory/4128-3-0x000001414B090000-0x000001414B0B2000-memory.dmp

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