stormser | 7df3dc992e44dc95941b8c3f83d57d37f89342997fcc7f50d76222380a0ae653

General

Target
2026-06-27_2668fab700c9bb143866e758ac7dfaec_elex_wannacry.exe
Size 79KB
Sample260629-k4htmabw3r
SHA256 7df3dc992e44dc95941b8c3f83d57d37f89342997fcc7f50d76222380a0ae653
MD5 2668fab700c9bb143866e758ac7dfaec
SHA1 758b0ddd56fec303cc39fbe6a25d4d9286bf6e57
SHA512 7ec50fe5334b7db6b950d6b7051b7b52c15a1ebc73f24077e6d5e8dfad4d8b671873b893981c190513a3250b5c575b75920a2f61d29739c52905644bd39b5401
SSDEEP 768:4vw9816vhKQLroi4/wQzXOQ69zbjlAAX5e9zx:wEGh0oilGizbR9Xwzx
TLSH
T1BC834BD38EAC4483FDE6697012B8DAB77C3E97C61504B99B6B91FD5408A33C1EB2411E
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 1 IoCs

resource	yara_rule
behavioral2/files/0x000d00000001c654-3.dat	family_stormser

Boot or Logon Autostart Execution: Active Setup 2 TTPs 2 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
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{74BA8AA2-0ECD-46a2-BE6F-8E79D439D874}	2026-06-27_2668fab700c9bb143866e758ac7dfaec_elex_wannacry.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{74BA8AA2-0ECD-46a2-BE6F-8E79D439D874}\stubpath = "C:\\Windows\\{74BA8AA2-0ECD-46a2-BE6F-8E79D439D874}.exe"	2026-06-27_2668fab700c9bb143866e758ac7dfaec_elex_wannacry.exe

Executes dropped EXE 2 IoCs

pid	Process
3644	{74BA8AA2-0ECD-46a2-BE6F-8E79D439D874}.exe
356	{74BA8AA2-0ECD-46a2-BE6F-8E79D439D874}.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\{74BA8AA2-0ECD-46a2-BE6F-8E79D439D874}.exe	2026-06-27_2668fab700c9bb143866e758ac7dfaec_elex_wannacry.exe

System Location Discovery: System Language Discovery 1 TTPs 4 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	2026-06-27_2668fab700c9bb143866e758ac7dfaec_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{74BA8AA2-0ECD-46a2-BE6F-8E79D439D874}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{74BA8AA2-0ECD-46a2-BE6F-8E79D439D874}.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-1-5-21-2894455325-857903158-4263030270-1000\{8FC8D056-E7A2-46D6-B183-CD580C85C29B}	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 5 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	924	2026-06-27_2668fab700c9bb143866e758ac7dfaec_elex_wannacry.exe
Token: SeShutdownPrivilege	2596	explorer.exe
Token: SeCreatePagefilePrivilege	2596	explorer.exe
Token: SeShutdownPrivilege	2596	explorer.exe
Token: SeCreatePagefilePrivilege	2596	explorer.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4504	sihost.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 924 wrote to memory of 3644	924	2026-06-27_2668fab700c9bb143866e758ac7dfaec_elex_wannacry.exe	89
PID 924 wrote to memory of 2784	924	2026-06-27_2668fab700c9bb143866e758ac7dfaec_elex_wannacry.exe	90
PID 4504 wrote to memory of 2596	4504	sihost.exe	95
PID 2596 wrote to memory of 356	2596	explorer.exe	96

C:\Users\Admin\AppData\Local\Temp\2026-06-27_2668fab700c9bb143866e758ac7dfaec_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-06-27_2668fab700c9bb143866e758ac7dfaec_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:924
- C:\Windows\{74BA8AA2-0ECD-46a2-BE6F-8E79D439D874}.exe
  C:\Windows\{74BA8AA2-0ECD-46a2-BE6F-8E79D439D874}.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:3644
- 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:2784

C:\Windows\system32\sihost.exe
sihost.exe
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:4504
- C:\Windows\explorer.exe
  explorer.exe /LOADSAVEDWINDOWS
  2⤵
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2596
- - C:\Windows\{74BA8AA2-0ECD-46a2-BE6F-8E79D439D874}.exe
    "C:\Windows\{74BA8AA2-0ECD-46a2-BE6F-8E79D439D874}.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:356

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

{74BA8AA2-0ECD-46a2-BE6F-8E79D439D874}.exe

Path C:\Windows\{74BA8AA2-0ECD-46a2-BE6F-8E79D439D874}.exe
Size 79KB
SHA256 26bdc86fa678454cd40015b32043d972ee8a9ca3604dceef509202fd205610d0
MD5 69b34dcc4e746b73ef7abd3fd4e56a5b
SHA1 b52746445f740d20ff14ae88b3e36c2f3486dafc
SHA512 4dcf8ead2a436108ee956d88a6afd5a599173b23e88f841e1c513bc086e668fc7e7e3c44b8481c34b39f91d24c5391348476b591e5419577cc3bd0896a36c032
SSDEEP 768:4vw9816vhKQLro+4/wQzXOQ69zbjlAAX5e9zx:wEGh0o+lGizbR9Xwzx
TLSH
T170834BD38EAC4483FDE6697012B8D9B77C3E97C61604B99B6B91FD5408A33C1EB2411E
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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