stormser | c83f9c3fca08e444d8dad7bf4767519b95eb1f1f646ce46e16ef4b5041889344

General

Target
2026-07-02_a7e5c6a9e4490c01b4f5fbe34705983d_elex_wannacry.exe
Size 168KB
Sample260702-vd1a4ah191
SHA256 c83f9c3fca08e444d8dad7bf4767519b95eb1f1f646ce46e16ef4b5041889344
MD5 a7e5c6a9e4490c01b4f5fbe34705983d
SHA1 7a26869407c3df18e089cee0f5f37bbfc08f6147
SHA512 61a15484d0302941d942bac62d3d1c0eb51ccae739ab4b6c650e174a1c7982b1351b98e840f9097eca0cda903ee490483134a0765f70d73cb53705fec8fe9ac3
SSDEEP 384:pbLwOs8AHsc4sMfwhKQLroYfr4/CFsrd:pvw9816vhKQLroYfr4/wQ
TLSH
T1ECF318834BDE5CF3FB91113008798AB9927B99D4960EBEEF7B90CD250077292D53A50B
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/0x000d00000001c5eb-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\{F28FD080-228C-4473-BA2F-E3C2AE79A803}	2026-07-02_a7e5c6a9e4490c01b4f5fbe34705983d_elex_wannacry.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{F28FD080-228C-4473-BA2F-E3C2AE79A803}\stubpath = "C:\\Windows\\{F28FD080-228C-4473-BA2F-E3C2AE79A803}.exe"	2026-07-02_a7e5c6a9e4490c01b4f5fbe34705983d_elex_wannacry.exe

Executes dropped EXE 2 IoCs

pid	Process
4828	{F28FD080-228C-4473-BA2F-E3C2AE79A803}.exe
4284	{F28FD080-228C-4473-BA2F-E3C2AE79A803}.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\{F28FD080-228C-4473-BA2F-E3C2AE79A803}.exe	2026-07-02_a7e5c6a9e4490c01b4f5fbe34705983d_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	2026-07-02_a7e5c6a9e4490c01b4f5fbe34705983d_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{F28FD080-228C-4473-BA2F-E3C2AE79A803}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{F28FD080-228C-4473-BA2F-E3C2AE79A803}.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\{E666FBF7-6C10-496F-8606-F3D1D6077607}	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	2588	2026-07-02_a7e5c6a9e4490c01b4f5fbe34705983d_elex_wannacry.exe
Token: SeShutdownPrivilege	5240	explorer.exe
Token: SeCreatePagefilePrivilege	5240	explorer.exe
Token: SeShutdownPrivilege	5240	explorer.exe
Token: SeCreatePagefilePrivilege	5240	explorer.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1832	sihost.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2588 wrote to memory of 4828	2588	2026-07-02_a7e5c6a9e4490c01b4f5fbe34705983d_elex_wannacry.exe	88
PID 2588 wrote to memory of 5324	2588	2026-07-02_a7e5c6a9e4490c01b4f5fbe34705983d_elex_wannacry.exe	89
PID 1832 wrote to memory of 5240	1832	sihost.exe	94
PID 5240 wrote to memory of 4284	5240	explorer.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-07-02_a7e5c6a9e4490c01b4f5fbe34705983d_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-02_a7e5c6a9e4490c01b4f5fbe34705983d_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:2588
- C:\Windows\{F28FD080-228C-4473-BA2F-E3C2AE79A803}.exe
  C:\Windows\{F28FD080-228C-4473-BA2F-E3C2AE79A803}.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:4828
- 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:5324

C:\Windows\system32\sihost.exe
sihost.exe
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:1832
- C:\Windows\explorer.exe
  explorer.exe /LOADSAVEDWINDOWS
  2⤵
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5240
- - C:\Windows\{F28FD080-228C-4473-BA2F-E3C2AE79A803}.exe
    "C:\Windows\{F28FD080-228C-4473-BA2F-E3C2AE79A803}.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4284

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

{F28FD080-228C-4473-BA2F-E3C2AE79A803}.exe

Path C:\Windows\{F28FD080-228C-4473-BA2F-E3C2AE79A803}.exe
Size 168KB
SHA256 17c7a42aa1d75e13ceec685e17688ab4de1d03f7ba18bb9b11764a529c82b91d
MD5 b65425687f3a2bf84f57b895cd1cef98
SHA1 573f36e041222aebaad92371b9f3736ab5e23f1f
SHA512 8fd157812608365b19391553a3b60d5b32a1eaeca7507feb95fcb52e30dc218899974538aa77255d36dfa7224f9ee742c6fa9b224e13ee2d5ef50e05bd3c9ac2
SSDEEP 192:pbOzawOs81elJHsc45CcRZOgtShcWaOT2QLrCqwPUr4/CFxyNhoy5t:pbLwOs8AHsc4sMfwhKQLroMr4/CFsrd
TLSH
T1C6F309834BDE58F3F791113008798AB9927B99D4960EBEAF6F90CD250077292D53A50B
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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