stormser | b9926741dd8e02fa59a339f518e2558c4334adcc4a235288a78a65250eaa0b8b

General

Target
2026-07-06_f694334a123e546c5ca4ed88d896756f_elex_wannacry.exe
Size 88KB
Sample260706-3wwdvsdw6s
SHA256 b9926741dd8e02fa59a339f518e2558c4334adcc4a235288a78a65250eaa0b8b
MD5 f694334a123e546c5ca4ed88d896756f
SHA1 5e9bdf37451fd437f3d20b86e94ecdea8e8c19f2
SHA512 1f46ce039b0b7ca5aa225cf1d853b13c2fe953db85710386526731ab6a6c2cfab0768927582a2137a63bccbfb237135c783b84363be1f250c64d92d91cc01486
SSDEEP 768:Qvw9816vhKQLroM4/wQRNrfrunMxVFA3b7gln:YEGh0oMl2unMxVS3Hg1
TLSH
T14A93A23D5DDA1037E277D6B585F126E3FE66B983360A1D0E469343428D23B53AD8AC1C
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/0x000d00000001c697-3.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\{10C3CBD7-A45E-4303-8F5C-282B66940EB0}	2026-07-06_f694334a123e546c5ca4ed88d896756f_elex_wannacry.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{10C3CBD7-A45E-4303-8F5C-282B66940EB0}\stubpath = "C:\\Windows\\{10C3CBD7-A45E-4303-8F5C-282B66940EB0}.exe"	2026-07-06_f694334a123e546c5ca4ed88d896756f_elex_wannacry.exe

Executes dropped EXE 2 IoCs

pid	Process
5904	{10C3CBD7-A45E-4303-8F5C-282B66940EB0}.exe
2244	{10C3CBD7-A45E-4303-8F5C-282B66940EB0}.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\{10C3CBD7-A45E-4303-8F5C-282B66940EB0}.exe	2026-07-06_f694334a123e546c5ca4ed88d896756f_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	2026-07-06_f694334a123e546c5ca4ed88d896756f_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{10C3CBD7-A45E-4303-8F5C-282B66940EB0}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{10C3CBD7-A45E-4303-8F5C-282B66940EB0}.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-1-5-21-2532687178-1633831978-1202193935-1000\{27E08BA5-37D8-43E2-B371-5F469A249DC4}	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	5840	2026-07-06_f694334a123e546c5ca4ed88d896756f_elex_wannacry.exe
Token: SeShutdownPrivilege	3404	explorer.exe
Token: SeCreatePagefilePrivilege	3404	explorer.exe
Token: SeShutdownPrivilege	3404	explorer.exe
Token: SeCreatePagefilePrivilege	3404	explorer.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
5360	sihost.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5840 wrote to memory of 5904	5840	2026-07-06_f694334a123e546c5ca4ed88d896756f_elex_wannacry.exe	87
PID 5840 wrote to memory of 4928	5840	2026-07-06_f694334a123e546c5ca4ed88d896756f_elex_wannacry.exe	88
PID 5360 wrote to memory of 3404	5360	sihost.exe	93
PID 3404 wrote to memory of 2244	3404	explorer.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-07-06_f694334a123e546c5ca4ed88d896756f_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-06_f694334a123e546c5ca4ed88d896756f_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:5840
- C:\Windows\{10C3CBD7-A45E-4303-8F5C-282B66940EB0}.exe
  C:\Windows\{10C3CBD7-A45E-4303-8F5C-282B66940EB0}.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:5904
- 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:4928

C:\Windows\system32\sihost.exe
sihost.exe
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:5360
- C:\Windows\explorer.exe
  explorer.exe /LOADSAVEDWINDOWS
  2⤵
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3404
- - C:\Windows\{10C3CBD7-A45E-4303-8F5C-282B66940EB0}.exe
    "C:\Windows\{10C3CBD7-A45E-4303-8F5C-282B66940EB0}.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2244

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

{10C3CBD7-A45E-4303-8F5C-282B66940EB0}.exe

Path C:\Windows\{10C3CBD7-A45E-4303-8F5C-282B66940EB0}.exe
Size 88KB
SHA256 a0073704e2e4d8fb097492b86ae1165ebb724c2942092d36e58c2bd4e26e88fd
MD5 d96698859f28f74ff148ddf4b26e7a3e
SHA1 915f73bd84966c1818a6d9cc4099bdfcd6b4adb1
SHA512 7dad6711aeb5474cad124ba3fd915e896d4ab73b968f7954d6398540a1274109a43ed2d5be5b1628e2a9596ec45cb5fb1b25790d2e100c6bb23c50c78db0598d
SSDEEP 768:Qvw9816vhKQLroA4/wQRNrfrunMxVFA3b7gln:YEGh0oAl2unMxVS3Hg1
TLSH
T10A93A23D5DDA1037E277D6B585F126E3FE66BA83360A1D0E469343428D23B53AD8AC1C
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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