stormser | 5646bf1579173012e598a524271c9367cd0d73984480278b5dfffe07cd9741df

General

Target
2026-06-30_ff0bf516d720544dcacaf802bae5cc02_elex_wannacry.exe
Size 60KB
Sample260701-cch2bact3l
SHA256 5646bf1579173012e598a524271c9367cd0d73984480278b5dfffe07cd9741df
MD5 ff0bf516d720544dcacaf802bae5cc02
SHA1 fb5da12607932627c9667eb20b4d579e82e86e50
SHA512 abc282dda1c2eaabd6bc6e2d72d4cf061ed3c289ccc185b246ec0256c503739651a17af2c2c2ee91684cf0edc3134c4226214f3e4b9ef6f8c7be73146cf9f836
SSDEEP 384:ubLwOs8AHsc4sMfwhKQLro04/CFsrdHWMZ:uvw9816vhKQLro04/wQpWMZ
TLSH
T153533B830F997CF2F7810175043A8BB992AB59D4D14FFE9BBF90CC194436651E83E60A
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery stormser persistence worm

Malware Config

Signatures

Family: Stormser, StormDDoS, StormAttack, Stormer
Stormser aka StormDDoS, StormAttack, and Stormer is a Windows worm written in C++.
worm stormser

Detects Stormser aka Storm DDoS and StormAttack 4 IoCs

resource	yara_rule
behavioral2/files/0x000e00000001c4e5-3.dat	family_stormser
behavioral2/files/0x000e00000001c4e8-6.dat	family_stormser
behavioral2/files/0x000f00000001c4e5-13.dat	family_stormser
behavioral2/files/0x000f00000001c4e8-18.dat	family_stormser

Detects Windows executables referencing non-Windows User-Agents 4 IoCs

resource	yara_rule
behavioral2/files/0x000e00000001c4e5-3.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/files/0x000e00000001c4e8-6.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/files/0x000f00000001c4e5-13.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/files/0x000f00000001c4e8-18.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Boot or Logon Autostart Execution: Active Setup 2 TTPs 8 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{A93E1F05-5930-4ea2-A3D5-6D4D57E04A4A}\stubpath = "C:\\Windows\\{A93E1F05-5930-4ea2-A3D5-6D4D57E04A4A}.exe"	{8A7B4C50-E1D4-4a2d-8767-509DAC928748}.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{054314AC-ADBA-4f62-AF81-30CFA41A0495}	{A93E1F05-5930-4ea2-A3D5-6D4D57E04A4A}.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{054314AC-ADBA-4f62-AF81-30CFA41A0495}\stubpath = "C:\\Windows\\{054314AC-ADBA-4f62-AF81-30CFA41A0495}.exe"	{A93E1F05-5930-4ea2-A3D5-6D4D57E04A4A}.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{86EA1F8B-6A9F-40ba-9EC6-6DBE043BC09C}	{054314AC-ADBA-4f62-AF81-30CFA41A0495}.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{86EA1F8B-6A9F-40ba-9EC6-6DBE043BC09C}\stubpath = "C:\\Windows\\{86EA1F8B-6A9F-40ba-9EC6-6DBE043BC09C}.exe"	{054314AC-ADBA-4f62-AF81-30CFA41A0495}.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{8A7B4C50-E1D4-4a2d-8767-509DAC928748}	2026-06-30_ff0bf516d720544dcacaf802bae5cc02_elex_wannacry.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{8A7B4C50-E1D4-4a2d-8767-509DAC928748}\stubpath = "C:\\Windows\\{8A7B4C50-E1D4-4a2d-8767-509DAC928748}.exe"	2026-06-30_ff0bf516d720544dcacaf802bae5cc02_elex_wannacry.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{A93E1F05-5930-4ea2-A3D5-6D4D57E04A4A}	{8A7B4C50-E1D4-4a2d-8767-509DAC928748}.exe

Executes dropped EXE 5 IoCs

pid	Process
2568	{8A7B4C50-E1D4-4a2d-8767-509DAC928748}.exe
984	{A93E1F05-5930-4ea2-A3D5-6D4D57E04A4A}.exe
3724	{054314AC-ADBA-4f62-AF81-30CFA41A0495}.exe
5904	{86EA1F8B-6A9F-40ba-9EC6-6DBE043BC09C}.exe
236	{86EA1F8B-6A9F-40ba-9EC6-6DBE043BC09C}.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\{054314AC-ADBA-4f62-AF81-30CFA41A0495}.exe	{A93E1F05-5930-4ea2-A3D5-6D4D57E04A4A}.exe
File created	C:\Windows\{86EA1F8B-6A9F-40ba-9EC6-6DBE043BC09C}.exe	{054314AC-ADBA-4f62-AF81-30CFA41A0495}.exe
File created	C:\Windows\{8A7B4C50-E1D4-4a2d-8767-509DAC928748}.exe	2026-06-30_ff0bf516d720544dcacaf802bae5cc02_elex_wannacry.exe
File created	C:\Windows\{A93E1F05-5930-4ea2-A3D5-6D4D57E04A4A}.exe	{8A7B4C50-E1D4-4a2d-8767-509DAC928748}.exe

System Location Discovery: System Language Discovery 1 TTPs 10 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	{A93E1F05-5930-4ea2-A3D5-6D4D57E04A4A}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{054314AC-ADBA-4f62-AF81-30CFA41A0495}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{86EA1F8B-6A9F-40ba-9EC6-6DBE043BC09C}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-06-30_ff0bf516d720544dcacaf802bae5cc02_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{8A7B4C50-E1D4-4a2d-8767-509DAC928748}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{86EA1F8B-6A9F-40ba-9EC6-6DBE043BC09C}.exe

Modifies registry class 3 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\Deployment\Package\*\S-1-5-21-3704578903-1610922810-1098216751-1000\{CCB1AB05-C211-4436-8E9A-CABD5173E9BC}	explorer.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{A8CDFF1C-4878-43be-B5FD-F8091C1C60D0}\Instance\	explorer.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{B4BFCC3A-DB2C-424C-B029-7FE99A87C641}\Instance\	explorer.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	5636	2026-06-30_ff0bf516d720544dcacaf802bae5cc02_elex_wannacry.exe
Token: SeIncBasePriorityPrivilege	2568	{8A7B4C50-E1D4-4a2d-8767-509DAC928748}.exe
Token: SeIncBasePriorityPrivilege	984	{A93E1F05-5930-4ea2-A3D5-6D4D57E04A4A}.exe
Token: SeIncBasePriorityPrivilege	3724	{054314AC-ADBA-4f62-AF81-30CFA41A0495}.exe
Token: SeShutdownPrivilege	4896	explorer.exe
Token: SeCreatePagefilePrivilege	4896	explorer.exe
Token: SeShutdownPrivilege	4896	explorer.exe
Token: SeCreatePagefilePrivilege	4896	explorer.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2580	sihost.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 5636 wrote to memory of 2568	5636	2026-06-30_ff0bf516d720544dcacaf802bae5cc02_elex_wannacry.exe	88
PID 5636 wrote to memory of 1432	5636	2026-06-30_ff0bf516d720544dcacaf802bae5cc02_elex_wannacry.exe	89
PID 2568 wrote to memory of 984	2568	{8A7B4C50-E1D4-4a2d-8767-509DAC928748}.exe	91
PID 2568 wrote to memory of 2940	2568	{8A7B4C50-E1D4-4a2d-8767-509DAC928748}.exe	92
PID 984 wrote to memory of 3724	984	{A93E1F05-5930-4ea2-A3D5-6D4D57E04A4A}.exe	93
PID 984 wrote to memory of 3292	984	{A93E1F05-5930-4ea2-A3D5-6D4D57E04A4A}.exe	94
PID 3724 wrote to memory of 5904	3724	{054314AC-ADBA-4f62-AF81-30CFA41A0495}.exe	95
PID 3724 wrote to memory of 5896	3724	{054314AC-ADBA-4f62-AF81-30CFA41A0495}.exe	96
PID 2580 wrote to memory of 4896	2580	sihost.exe	101
PID 4896 wrote to memory of 236	4896	explorer.exe	102

C:\Users\Admin\AppData\Local\Temp\2026-06-30_ff0bf516d720544dcacaf802bae5cc02_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-06-30_ff0bf516d720544dcacaf802bae5cc02_elex_wannacry.exe"
1⤵
- Boot or Logon Autostart Execution: Active Setup
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5636
- C:\Windows\{8A7B4C50-E1D4-4a2d-8767-509DAC928748}.exe
  C:\Windows\{8A7B4C50-E1D4-4a2d-8767-509DAC928748}.exe
  2⤵
  - Boot or Logon Autostart Execution: Active Setup
  - Executes dropped EXE
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2568
- - C:\Windows\{A93E1F05-5930-4ea2-A3D5-6D4D57E04A4A}.exe
    C:\Windows\{A93E1F05-5930-4ea2-A3D5-6D4D57E04A4A}.exe
    3⤵
    - Boot or Logon Autostart Execution: Active Setup
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:984
  - - C:\Windows\{054314AC-ADBA-4f62-AF81-30CFA41A0495}.exe
      C:\Windows\{054314AC-ADBA-4f62-AF81-30CFA41A0495}.exe
      4⤵
      Boot or Logon Autostart Execution: Active Setup
      Executes dropped EXE
      Drops file in Windows directory
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:3724
    - - C:\Windows\{86EA1F8B-6A9F-40ba-9EC6-6DBE043BC09C}.exe
        
        C:\Windows\{86EA1F8B-6A9F-40ba-9EC6-6DBE043BC09C}.exe
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        
        PID:5904
    - - C:\Windows\SysWOW64\cmd.exe
        
        C:\Windows\system32\cmd.exe /c del C:\Windows\{05431~1.EXE > nul
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:5896
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c del C:\Windows\{A93E1~1.EXE > nul
      4⤵
      System Location Discovery: System Language Discovery
      PID:3292
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c del C:\Windows\{8A7B4~1.EXE > nul
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2940
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del C:\Users\Admin\AppData\Local\Temp\2026-0~1.EXE > nul
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1432

C:\Windows\system32\sihost.exe
sihost.exe
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:2580
- C:\Windows\explorer.exe
  explorer.exe /LOADSAVEDWINDOWS
  2⤵
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4896
- - C:\Windows\{86EA1F8B-6A9F-40ba-9EC6-6DBE043BC09C}.exe
    "C:\Windows\{86EA1F8B-6A9F-40ba-9EC6-6DBE043BC09C}.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:236

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Active Setup

1

T1547.014

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Active Setup

1

T1547.014

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

{054314AC-ADBA-4f62-AF81-30CFA41A0495}.exe

Path C:\Windows\{054314AC-ADBA-4f62-AF81-30CFA41A0495}.exe
Size 60KB
SHA256 b19c5a9f269b370120328314b0eda5c60ca7b85606ebbfed7600775abdbd0b25
MD5 e9a8ba3326b4cb69695174c9096a4c52
SHA1 9f602124aa0dbf6910e262716c87beb6f41c7f18
SHA512 bca9ede706ca6ffde05f94705d89f4689acdf6744e233e65e79b28eb2e687ed93500108f40ecd53642073b5176522ed6736850cd70ca9ed4047f219a2685e505
SSDEEP 384:ubLwOs8AHsc4sMfwhKQLroN4/CFsrdHWMZ:uvw9816vhKQLroN4/wQpWMZ
TLSH
T17B534B834F997CF2FB810175043A8BB992AB59D4D14FFE9BBF90CC194436651E83E60A
MD5 SHA1 SHA512 SSDEEP TLSH

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{86EA1F8B-6A9F-40ba-9EC6-6DBE043BC09C}.exe

Path C:\Windows\{86EA1F8B-6A9F-40ba-9EC6-6DBE043BC09C}.exe
Size 60KB
SHA256 0e55baa9d6ec34c1eac29bba0f02903b35a71448e2d7d8dc8d9c8542630dea90
MD5 e3a069643381e7d55a3eb47f3ba9d255
SHA1 ed555fcd5b1a435640f39f055098451a1c45bc5e
SHA512 89e5f39699db3c140c80a13e5cd80ce3d4c1c113dc410e2088a93edbf445eb9051f0ff430176fdd8ab8d4b89daa45e243cf84cff2fa0d243373b1ed25b00b804
SSDEEP 384:ubLwOs8AHsc4sMfwhKQLrod4/CFsrdHWMZ:uvw9816vhKQLrod4/wQpWMZ
TLSH
T15F533B834F997CF2F7810175043A8BB992AB59D4D14FFE9BBF90CC194436651E83E60A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

{8A7B4C50-E1D4-4a2d-8767-509DAC928748}.exe

Path C:\Windows\{8A7B4C50-E1D4-4a2d-8767-509DAC928748}.exe
Size 60KB
SHA256 10e09990edb7f7a3685bbec59c296ea49a96dd5a1df4e00e2cb9318b18256bd3
MD5 c9cb2d49fb7f9031069d29e4e7c272bb
SHA1 9d315587490b048b2298981c872a51aaecca7c99
SHA512 5375dc7731c81fd8f700ea1d4415f0b8a3aae9ee85d54a3f7bba935153c794da8d48c3ef48e48feae89df50b2066198633211dd3242cbede562424276fdaa785
SSDEEP 384:ubLwOs8AHsc4sMfwhKQLroQ4/CFsrdHWMZ:uvw9816vhKQLroQ4/wQpWMZ
TLSH
T136534B830F997CF2FB810175043A8BB992AB59D4D14FFE9BBF90CC194436651E83E60A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

{A93E1F05-5930-4ea2-A3D5-6D4D57E04A4A}.exe

Path C:\Windows\{A93E1F05-5930-4ea2-A3D5-6D4D57E04A4A}.exe
Size 60KB
SHA256 4a2b02e7898535c00cee77f9263605555b9b438a80c9b4f2a5858903a0187946
MD5 a00bfe559354877abd354b12111f4c04
SHA1 1aff6bf053b6dd6370ac2e0a3f96733b371e8bc2
SHA512 74d2ff59152c444c2b83b50d0f342ee7b46a6eb910f95356880b42458b1cc19300bffb9ba500b73fadad2debd819947db8b43c9be296d1a71f3a133b183ce973
SSDEEP 384:ubLwOs8AHsc4sMfwhKQLrou4/CFsrdHWMZ:uvw9816vhKQLrou4/wQpWMZ
TLSH
T19F534C830F997CF2FB810175047A8BB9926B59D4D14FFE9BBF90CC194436641E83E60A
MD5 SHA1 SHA512 SSDEEP TLSH

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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