stormser | b532e076e66e02abf15b0b9637a2ec8bff2ec651aaaf3b2844c8545c36d6db66

General

Target
2026-07-06_8efa3827a426fe261e84b75a19658c1b_elex_rincux_wannacry.exe
Size 64KB
Sample260706-sf34nagy2w
SHA256 b532e076e66e02abf15b0b9637a2ec8bff2ec651aaaf3b2844c8545c36d6db66
MD5 8efa3827a426fe261e84b75a19658c1b
SHA1 1e5f27eed9314d916f17e7bb821f25a95a8857d3
SHA512 65595206851ffae853f87c8dba3a2bf25a2a7c3c61a9a0aef1b4a85ceb16de770bc0bf995e0b08013dd030e61304aa6a3ab83f733f1550932d3d51f5131cd5c4
SSDEEP 768:Vvw981AvhKeroCk4/wQxWMZQcpFM1FgDagXP2TyS1tl7lfqvocqcdT3WVda:ZEG7ioCklwWMZQcpmgDagIyS1loL7Wra
TLSH
T1B9533A439181BDF2FB780134B16A1FB9553EC5B282C82D6F6B53CDAB54E5C23A521B83
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/1316-0-0x0000000000400000-0x0000000000410000-memory.dmp	family_stormser
behavioral2/memory/1316-1-0x0000000000400000-0x0000000000410000-memory.dmp	family_stormser
behavioral2/files/0x000d00000001c5c4-5.dat	family_stormser
behavioral2/memory/1316-8-0x0000000000400000-0x0000000000410000-memory.dmp	family_stormser
behavioral2/memory/4256-6-0x0000000000400000-0x0000000000410000-memory.dmp	family_stormser

Detects Windows executables referencing non-Windows User-Agents 5 IoCs

resource	yara_rule
behavioral2/memory/1316-0-0x0000000000400000-0x0000000000410000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/1316-1-0x0000000000400000-0x0000000000410000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/files/0x000d00000001c5c4-5.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/1316-8-0x0000000000400000-0x0000000000410000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/4256-6-0x0000000000400000-0x0000000000410000-memory.dmp	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\{4320C748-8769-476a-B51A-BB493C4661B5}	2026-07-06_8efa3827a426fe261e84b75a19658c1b_elex_rincux_wannacry.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4320C748-8769-476a-B51A-BB493C4661B5}\stubpath = "C:\\Windows\\{4320C748-8769-476a-B51A-BB493C4661B5}.exe"	2026-07-06_8efa3827a426fe261e84b75a19658c1b_elex_rincux_wannacry.exe

Executes dropped EXE 2 IoCs

pid	Process
4256	{4320C748-8769-476a-B51A-BB493C4661B5}.exe
1880	{4320C748-8769-476a-B51A-BB493C4661B5}.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\{4320C748-8769-476a-B51A-BB493C4661B5}.exe	2026-07-06_8efa3827a426fe261e84b75a19658c1b_elex_rincux_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	{4320C748-8769-476a-B51A-BB493C4661B5}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-07-06_8efa3827a426fe261e84b75a19658c1b_elex_rincux_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{4320C748-8769-476a-B51A-BB493C4661B5}.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\{77D64914-1341-47B8-8FE9-726882A19A76}	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	1316	2026-07-06_8efa3827a426fe261e84b75a19658c1b_elex_rincux_wannacry.exe
Token: SeShutdownPrivilege	756	explorer.exe
Token: SeCreatePagefilePrivilege	756	explorer.exe
Token: SeShutdownPrivilege	756	explorer.exe
Token: SeCreatePagefilePrivilege	756	explorer.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3368	sihost.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1316 wrote to memory of 4256	1316	2026-07-06_8efa3827a426fe261e84b75a19658c1b_elex_rincux_wannacry.exe	88
PID 1316 wrote to memory of 1452	1316	2026-07-06_8efa3827a426fe261e84b75a19658c1b_elex_rincux_wannacry.exe	89
PID 3368 wrote to memory of 756	3368	sihost.exe	94
PID 756 wrote to memory of 1880	756	explorer.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-07-06_8efa3827a426fe261e84b75a19658c1b_elex_rincux_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-06_8efa3827a426fe261e84b75a19658c1b_elex_rincux_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:1316
- C:\Windows\{4320C748-8769-476a-B51A-BB493C4661B5}.exe
  C:\Windows\{4320C748-8769-476a-B51A-BB493C4661B5}.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:4256
- 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:1452

C:\Windows\system32\sihost.exe
sihost.exe
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:3368
- C:\Windows\explorer.exe
  explorer.exe /LOADSAVEDWINDOWS
  2⤵
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:756
- - C:\Windows\{4320C748-8769-476a-B51A-BB493C4661B5}.exe
    "C:\Windows\{4320C748-8769-476a-B51A-BB493C4661B5}.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1880

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

{4320C748-8769-476a-B51A-BB493C4661B5}.exe

Path C:\Windows\{4320C748-8769-476a-B51A-BB493C4661B5}.exe
Size 64KB
SHA256 fc2d3bfa82d65f5bc813e5fa99a2515d2ef392601282a17fd0527da6642c8f1c
MD5 4519af892c8ed7a209ec8a026ca6745f
SHA1 665cb0b530db873cec3a6fef4baeadd6f332b8c8
SHA512 bc510c01629a612566ec2def584d0c7b2f2297539d5de5fd904e7a6b600d8280988d49ee72c654019b5676186d5b09f90abefca21360e4d51eb70547929be10a
SSDEEP 768:Vvw981AvhKeroC64/wQxWMZQcpFM1FgDagXP2TyS1tl7lfqvocqcdT3WVda:ZEG7ioC6lwWMZQcpmgDagIyS1loL7Wra
TLSH
T1C9533A439181BDF2FB780134B16A1FB9553EC5B282C82D6F6B53CDAB54E5C23A521B83
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1316-0-0x0000000000400000-0x0000000000410000-memory.dmp

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memory/1316-1-0x0000000000400000-0x0000000000410000-memory.dmp

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memory/1316-8-0x0000000000400000-0x0000000000410000-memory.dmp

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memory/4256-6-0x0000000000400000-0x0000000000410000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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