stormser | 2e2f1925c854193e108f8551a72c6d2ca539b263ac02d22b19c0b7a8cf551d1e

General

Target
2026-07-01_28763ea71555681b1afc0f2255999bd0_elex_wannacry.exe
Size 59KB
Sample260701-yjgbysfw9v
SHA256 2e2f1925c854193e108f8551a72c6d2ca539b263ac02d22b19c0b7a8cf551d1e
MD5 28763ea71555681b1afc0f2255999bd0
SHA1 981394a4365a1d353514d79c899b43fda2ac44b4
SHA512 edfb155e920faa0a5f4e4124ffd5f4526dd62dd9df2a31ae93625538bbef219afdc3b8f06efb62f48541d8d0a1a4f2b49708aac9b7b3276c6ac5047a50c73bb2
SSDEEP 384:MbLwOs8AHsc4sMfwhKQLroKv4/CFsrYAutg/CNl2e4WMZ:Mvw9816vhKQLroi4/wQLfwl27WMZ
TLSH
T1DE439E831F9A7CF2F3860075097F97BA936B55C4D24EBE9B6F90CC0D4066641E83E609
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/0x000e00000001c58f-3.dat	family_stormser

Detects Windows executables referencing non-Windows User-Agents 1 IoCs

resource	yara_rule
behavioral2/files/0x000e00000001c58f-3.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

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\{43C51741-F7D1-4c1a-8C1D-D2FDEE25C82F}	2026-07-01_28763ea71555681b1afc0f2255999bd0_elex_wannacry.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{43C51741-F7D1-4c1a-8C1D-D2FDEE25C82F}\stubpath = "C:\\Windows\\{43C51741-F7D1-4c1a-8C1D-D2FDEE25C82F}.exe"	2026-07-01_28763ea71555681b1afc0f2255999bd0_elex_wannacry.exe

Executes dropped EXE 2 IoCs

pid	Process
2916	{43C51741-F7D1-4c1a-8C1D-D2FDEE25C82F}.exe
4448	{43C51741-F7D1-4c1a-8C1D-D2FDEE25C82F}.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\{43C51741-F7D1-4c1a-8C1D-D2FDEE25C82F}.exe	2026-07-01_28763ea71555681b1afc0f2255999bd0_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	{43C51741-F7D1-4c1a-8C1D-D2FDEE25C82F}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{43C51741-F7D1-4c1a-8C1D-D2FDEE25C82F}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-07-01_28763ea71555681b1afc0f2255999bd0_elex_wannacry.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-1-5-21-1991999443-3181470666-3272020885-1000\{0C8CC7EF-60CD-4CB2-B8B3-10BF104A6D22}	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	1180	2026-07-01_28763ea71555681b1afc0f2255999bd0_elex_wannacry.exe
Token: SeShutdownPrivilege	108	explorer.exe
Token: SeCreatePagefilePrivilege	108	explorer.exe
Token: SeShutdownPrivilege	108	explorer.exe
Token: SeCreatePagefilePrivilege	108	explorer.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
5044	sihost.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1180 wrote to memory of 2916	1180	2026-07-01_28763ea71555681b1afc0f2255999bd0_elex_wannacry.exe	88
PID 1180 wrote to memory of 4008	1180	2026-07-01_28763ea71555681b1afc0f2255999bd0_elex_wannacry.exe	89
PID 5044 wrote to memory of 108	5044	sihost.exe	94
PID 108 wrote to memory of 4448	108	explorer.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-07-01_28763ea71555681b1afc0f2255999bd0_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-01_28763ea71555681b1afc0f2255999bd0_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:1180
- C:\Windows\{43C51741-F7D1-4c1a-8C1D-D2FDEE25C82F}.exe
  C:\Windows\{43C51741-F7D1-4c1a-8C1D-D2FDEE25C82F}.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2916
- 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:4008

C:\Windows\system32\sihost.exe
sihost.exe
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:5044
- C:\Windows\explorer.exe
  explorer.exe /LOADSAVEDWINDOWS
  2⤵
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:108
- - C:\Windows\{43C51741-F7D1-4c1a-8C1D-D2FDEE25C82F}.exe
    "C:\Windows\{43C51741-F7D1-4c1a-8C1D-D2FDEE25C82F}.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4448

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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{43C51741-F7D1-4c1a-8C1D-D2FDEE25C82F}.exe

Path C:\Windows\{43C51741-F7D1-4c1a-8C1D-D2FDEE25C82F}.exe
Size 59KB
SHA256 55e549b9792839f738dbaf60a72ede3fdb2eb2f501c6057142717d7bd750c7b2
MD5 5a64caa3e0fb4d44d07a729661d81a5b
SHA1 f882fb8aa055f84482456a729774ebde3bb05094
SHA512 36c9c922f7eaf809f04defcdb282d37b49007e6272642bc509e784e3d0258f5fc99b253a4f358cca9fcfcf43180c08cef19a7aae4be036ccb7aa960f1051952e
SSDEEP 384:MbLwOs8AHsc4sMfwhKQLroKQ4/CFsrYAutg/CNl2e4WMZ:Mvw9816vhKQLroB4/wQLfwl27WMZ
TLSH
T12C439E831F9A7CF2F7860075097F97B6836B54C4D24EBE9B6FA0CC0D4466641E83E60A
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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