stormser | 2a0a7894e2bb1a642f01d7a31a82681525d6388241789bfe872e4817a7e14437

General

Target
2026-07-05_539d3f59488c5076d161bb216ddcbb03_elex_wannacry.exe
Size 60KB
Sample260705-tmj5ssdx7x
SHA256 2a0a7894e2bb1a642f01d7a31a82681525d6388241789bfe872e4817a7e14437
MD5 539d3f59488c5076d161bb216ddcbb03
SHA1 881f8a8f9276224c7cbd8cdb47c37433f7d5ca4f
SHA512 98f2a20aa68c092eb65006596e49c1c6da8caf4755df24e495edb662bbf8487d762f790cd23295360547b216aee08552bf27fc521bebd1bf7c9311a41bc189e8
SSDEEP 192:obOzawOs81elJHsc45CcRZOgtShcWaOT2QLrCqwNY04/CFxyNhoy5t/:obLwOs8AHsc4sMfwhKQLrof4/CFsrd/
TLSH
T1F15307834BDA9CF2F791117108794BB9927B99D4950EBEDFAF90CD550037292E83A10B
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 5 IoCs

resource	yara_rule
behavioral2/memory/5912-0-0x0000000000400000-0x0000000000410000-memory.dmp	family_stormser
behavioral2/memory/5912-1-0x0000000000400000-0x0000000000410000-memory.dmp	family_stormser
behavioral2/files/0x000e00000001c596-5.dat	family_stormser
behavioral2/memory/4640-6-0x0000000000400000-0x0000000000410000-memory.dmp	family_stormser
behavioral2/memory/5912-7-0x0000000000400000-0x0000000000410000-memory.dmp	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\{BD459F2F-706A-42a3-ACC1-E4E87B6D72D6}	2026-07-05_539d3f59488c5076d161bb216ddcbb03_elex_wannacry.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{BD459F2F-706A-42a3-ACC1-E4E87B6D72D6}\stubpath = "C:\\Windows\\{BD459F2F-706A-42a3-ACC1-E4E87B6D72D6}.exe"	2026-07-05_539d3f59488c5076d161bb216ddcbb03_elex_wannacry.exe

Executes dropped EXE 2 IoCs

pid	Process
4640	{BD459F2F-706A-42a3-ACC1-E4E87B6D72D6}.exe
3800	{BD459F2F-706A-42a3-ACC1-E4E87B6D72D6}.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\{BD459F2F-706A-42a3-ACC1-E4E87B6D72D6}.exe	2026-07-05_539d3f59488c5076d161bb216ddcbb03_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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{BD459F2F-706A-42a3-ACC1-E4E87B6D72D6}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-07-05_539d3f59488c5076d161bb216ddcbb03_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{BD459F2F-706A-42a3-ACC1-E4E87B6D72D6}.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\{FDE98CB1-03B8-4700-9709-1CAEACA3E870}	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	5912	2026-07-05_539d3f59488c5076d161bb216ddcbb03_elex_wannacry.exe
Token: SeShutdownPrivilege	4860	explorer.exe
Token: SeCreatePagefilePrivilege	4860	explorer.exe
Token: SeShutdownPrivilege	4860	explorer.exe
Token: SeCreatePagefilePrivilege	4860	explorer.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2596	sihost.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5912 wrote to memory of 4640	5912	2026-07-05_539d3f59488c5076d161bb216ddcbb03_elex_wannacry.exe	88
PID 5912 wrote to memory of 576	5912	2026-07-05_539d3f59488c5076d161bb216ddcbb03_elex_wannacry.exe	89
PID 2596 wrote to memory of 4860	2596	sihost.exe	94
PID 4860 wrote to memory of 3800	4860	explorer.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-07-05_539d3f59488c5076d161bb216ddcbb03_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-05_539d3f59488c5076d161bb216ddcbb03_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:5912
- C:\Windows\{BD459F2F-706A-42a3-ACC1-E4E87B6D72D6}.exe
  C:\Windows\{BD459F2F-706A-42a3-ACC1-E4E87B6D72D6}.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:4640
- 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:576

C:\Windows\system32\sihost.exe
sihost.exe
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:2596
- C:\Windows\explorer.exe
  explorer.exe /LOADSAVEDWINDOWS
  2⤵
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4860
- - C:\Windows\{BD459F2F-706A-42a3-ACC1-E4E87B6D72D6}.exe
    "C:\Windows\{BD459F2F-706A-42a3-ACC1-E4E87B6D72D6}.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3800

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

{BD459F2F-706A-42a3-ACC1-E4E87B6D72D6}.exe

Path C:\Windows\{BD459F2F-706A-42a3-ACC1-E4E87B6D72D6}.exe
Size 60KB
SHA256 abc1146f8e015bd45befe9931cc28e66f72f067a6ff36090554436657387812c
MD5 e08eaec56d29b4bf0d10eee4402eff13
SHA1 06c141abc8a68beded3fa27544d91e200742d21f
SHA512 cd4211b9f49241654cbbbb834851620e07c651d620b8d625174003b865f2d7731f12b89a27f218e70e6717fec48698873750104be17c6e97b988ca8243999f19
SSDEEP 192:obOzawOs81elJHsc45CcRZOgtShcWaOT2QLrCqwaY04/CFxyNhoy5t/:obLwOs8AHsc4sMfwhKQLroQ4/CFsrd/
TLSH
T1885308834BDE9CF2FB91117108794BB9927B99D4910EBEDFAF90CD150037292E83A10B
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4640-6-0x0000000000400000-0x0000000000410000-memory.dmp

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memory/5912-0-0x0000000000400000-0x0000000000410000-memory.dmp

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memory/5912-1-0x0000000000400000-0x0000000000410000-memory.dmp

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memory/5912-7-0x0000000000400000-0x0000000000410000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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