aesrt | b6743906c49c1c7a36439a46de9aca88b6cd40f52af128b215f808a406a69598

Analysis

max time kernel
298s
max time network
122s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260617-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260617-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
19/06/2026, 19:55

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General

Target
b6743906c49c1c7a36439a46de9aca88b6cd40f52af128b215f808a406a69598.exe
Size 1.4MB
Sample260619-ym9snscv2x
SHA256 b6743906c49c1c7a36439a46de9aca88b6cd40f52af128b215f808a406a69598
MD5 51d08f5a12c157b26ecf059779129b11
SHA1 f17dd151a664a71727d5c07b29a1542ae5707d04
SHA512 81b882af300c637aeae6afe94318c92473aecefd6d89564f11ad72d0767fb00a9556fbb29e7c19ba91ce259525a3566e62dd45cc0c5df09f30669052d009d32f
SSDEEP 24576:J6w15zVAFj5WEx9+22sHFXVYmLmYy+vz236ZSV8BGxon3sgGhzl1KsIV:QsV85WU9+ElYmyZMz23sSyBGdgelIs
TLSH
T1B865138581910B9BDC0143339D271B86BBB108355174EB16FBE3B39D7DE9310BE46AEA
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion discovery execution aesrt impact persistence ransomware trojan

Malware Config

Signatures

Family: AESRT
AESRT is a ransomware.
ransomware aesrt

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\windows\\system32\\userinit.exe,C:\\Users\\Admin\\AppData\\Local\\Temp\\b6743906c49c1c7a36439a46de9aca88b6cd40f52af128b215f808a406a69598.exe,"	b6743906c49c1c7a36439a46de9aca88b6cd40f52af128b215f808a406a69598.exe

UAC bypass 3 TTPs 1 IoCs

defense_evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	b6743906c49c1c7a36439a46de9aca88b6cd40f52af128b215f808a406a69598.exe

Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware defense_evasion impact execution

File Deletion
T1070.004

Inhibit System Recovery
T1490

Windows Management Instrumentation
T1047
Renames multiple (119) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware
Disables Task Manager via registry modification
defense_evasion

Checks whether UAC is enabled 1 TTPs 2 IoCs

defense_evasion trojan

System Information Discovery

T1082

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	b6743906c49c1c7a36439a46de9aca88b6cd40f52af128b215f808a406a69598.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	b6743906c49c1c7a36439a46de9aca88b6cd40f52af128b215f808a406a69598.exe

Drops desktop.ini file(s) 5 IoCs

description	ioc	Process
File created	C:\Users\Admin\Desktop\desktop.ini	b6743906c49c1c7a36439a46de9aca88b6cd40f52af128b215f808a406a69598.exe
File created	C:\Users\Admin\Downloads\desktop.ini	b6743906c49c1c7a36439a46de9aca88b6cd40f52af128b215f808a406a69598.exe
File created	C:\Users\Admin\Videos\desktop.ini	b6743906c49c1c7a36439a46de9aca88b6cd40f52af128b215f808a406a69598.exe
File created	C:\Users\Admin\Music\desktop.ini	b6743906c49c1c7a36439a46de9aca88b6cd40f52af128b215f808a406a69598.exe
File created	C:\Users\Admin\Pictures\desktop.ini	b6743906c49c1c7a36439a46de9aca88b6cd40f52af128b215f808a406a69598.exe

Modifies WinLogon 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\ShellExperience = "\"ShellExperience.exe\""	b6743906c49c1c7a36439a46de9aca88b6cd40f52af128b215f808a406a69598.exe

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3655380807-1096177077-1670381078-1000\Control Panel\Desktop\Wallpaper = "C:\\Program Files\\Temp\\AESRT\\AESRTback.png"	b6743906c49c1c7a36439a46de9aca88b6cd40f52af128b215f808a406a69598.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\Temp\AESRT\AESRTback.png	b6743906c49c1c7a36439a46de9aca88b6cd40f52af128b215f808a406a69598.exe
File opened for modification	C:\Program Files\Temp\AESRT\refresh.bat	b6743906c49c1c7a36439a46de9aca88b6cd40f52af128b215f808a406a69598.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WMIC.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b6743906c49c1c7a36439a46de9aca88b6cd40f52af128b215f808a406a69598.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2852	WMIC.exe
2852	WMIC.exe
2852	WMIC.exe
2852	WMIC.exe

Suspicious use of AdjustPrivilegeToken 46 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2852	WMIC.exe
Token: SeSecurityPrivilege	2852	WMIC.exe
Token: SeTakeOwnershipPrivilege	2852	WMIC.exe
Token: SeLoadDriverPrivilege	2852	WMIC.exe
Token: SeSystemProfilePrivilege	2852	WMIC.exe
Token: SeSystemtimePrivilege	2852	WMIC.exe
Token: SeProfSingleProcessPrivilege	2852	WMIC.exe
Token: SeIncBasePriorityPrivilege	2852	WMIC.exe
Token: SeCreatePagefilePrivilege	2852	WMIC.exe
Token: SeBackupPrivilege	2852	WMIC.exe
Token: SeRestorePrivilege	2852	WMIC.exe
Token: SeShutdownPrivilege	2852	WMIC.exe
Token: SeDebugPrivilege	2852	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2852	WMIC.exe
Token: SeRemoteShutdownPrivilege	2852	WMIC.exe
Token: SeUndockPrivilege	2852	WMIC.exe
Token: SeManageVolumePrivilege	2852	WMIC.exe
Token: 33	2852	WMIC.exe
Token: 34	2852	WMIC.exe
Token: 35	2852	WMIC.exe
Token: 36	2852	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2852	WMIC.exe
Token: SeSecurityPrivilege	2852	WMIC.exe
Token: SeTakeOwnershipPrivilege	2852	WMIC.exe
Token: SeLoadDriverPrivilege	2852	WMIC.exe
Token: SeSystemProfilePrivilege	2852	WMIC.exe
Token: SeSystemtimePrivilege	2852	WMIC.exe
Token: SeProfSingleProcessPrivilege	2852	WMIC.exe
Token: SeIncBasePriorityPrivilege	2852	WMIC.exe
Token: SeCreatePagefilePrivilege	2852	WMIC.exe
Token: SeBackupPrivilege	2852	WMIC.exe
Token: SeRestorePrivilege	2852	WMIC.exe
Token: SeShutdownPrivilege	2852	WMIC.exe
Token: SeDebugPrivilege	2852	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2852	WMIC.exe
Token: SeRemoteShutdownPrivilege	2852	WMIC.exe
Token: SeUndockPrivilege	2852	WMIC.exe
Token: SeManageVolumePrivilege	2852	WMIC.exe
Token: 33	2852	WMIC.exe
Token: 34	2852	WMIC.exe
Token: 35	2852	WMIC.exe
Token: 36	2852	WMIC.exe
Token: SeBackupPrivilege	4932	vssvc.exe
Token: SeRestorePrivilege	4932	vssvc.exe
Token: SeAuditPrivilege	4932	vssvc.exe
Token: SeDebugPrivilege	1316	b6743906c49c1c7a36439a46de9aca88b6cd40f52af128b215f808a406a69598.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1316 wrote to memory of 3028	1316	b6743906c49c1c7a36439a46de9aca88b6cd40f52af128b215f808a406a69598.exe	89
PID 3028 wrote to memory of 2852	3028	cmd.exe	91
PID 1316 wrote to memory of 612	1316	b6743906c49c1c7a36439a46de9aca88b6cd40f52af128b215f808a406a69598.exe	96
PID 612 wrote to memory of 4516	612	cmd.exe	98
PID 612 wrote to memory of 1944	612	cmd.exe	99
PID 612 wrote to memory of 4616	612	cmd.exe	100
PID 612 wrote to memory of 1956	612	cmd.exe	101
PID 612 wrote to memory of 4852	612	cmd.exe	102

System policy modification 1 TTPs 1 IoCs

defense_evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	b6743906c49c1c7a36439a46de9aca88b6cd40f52af128b215f808a406a69598.exe

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\b6743906c49c1c7a36439a46de9aca88b6cd40f52af128b215f808a406a69598.exe
"C:\Users\Admin\AppData\Local\Temp\b6743906c49c1c7a36439a46de9aca88b6cd40f52af128b215f808a406a69598.exe"
1⤵
- Modifies WinLogon for persistence
- UAC bypass
- Checks whether UAC is enabled
- Drops desktop.ini file(s)
- Modifies WinLogon
- Sets desktop wallpaper using registry
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1316
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c vssadmin delete shadows /all /quiet & wmic shadowcopy delete & bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no & wbadmin delete catalog -quiet
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3028
- - C:\Windows\SysWOW64\Wbem\WMIC.exe
    wmic shadowcopy delete
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2852
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Program Files\Temp\AESRT\refresh.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:612
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters ,1 ,True
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4516
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters ,1 ,True
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1944
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters ,1 ,True
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4616
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters ,1 ,True
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1956
- - C:\Windows\SysWOW64\rundll32.exe
    RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters ,1 ,True
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4852

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4932

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Windows Management Instrumentation

T1047

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Indicator Removal

T1070

File Deletion

T1070.004

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Defacement

T1491

Inhibit System Recovery

T1490

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Downloads

refresh.bat

Path C:\Program Files\Temp\AESRT\refresh.bat
Size 378B
SHA256 98ba9ab619027be3265fd7827270e1ec59fbe39b79f98c65c17712f667c7fe8a
MD5 0c7022bc17761ecace63d45343c9d2fd
SHA1 7fdf53bc92830e4e5935f61d745a055edd3fc9e3
SHA512 ea434972b6fbffdf6c59e083cc1ed55557b4aa9113413f387b20c5eaf212a86ce995d4c8a93251cc22b9fd8b7ae4fc4125bbc85f5caca2dad8d81f4bb05dba5a
TLSH
T1A1E02200CB208A808C228C008BC8A0B0B0AC20CBF83F000202B00A830C2BC3CB2E338C
MD5 SHA1 SHA512 TLSH

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memory/1316-0-0x0000000074A02000-0x0000000074A03000-memory.dmp

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memory/1316-1-0x00000000005C0000-0x0000000000728000-memory.dmp

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memory/1316-4-0x0000000005740000-0x0000000005CFA000-memory.dmp

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memory/1316-5-0x0000000005260000-0x00000000052F2000-memory.dmp

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memory/1316-6-0x00000000749F0000-0x00000000751AC000-memory.dmp

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memory/1316-245-0x00000000062E0000-0x00000000062EA000-memory.dmp

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memory/1316-246-0x00000000749F0000-0x00000000751AC000-memory.dmp

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memory/1316-254-0x0000000074A02000-0x0000000074A03000-memory.dmp

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memory/1316-255-0x00000000749F0000-0x00000000751AC000-memory.dmp

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