stormser | 7e23d826e4d3d98bc1e6728592d1dac114f18877dfae2170a705da1318056bb0

General

Target
2026-08-17_42c6533248d090d8b362555a94fa8f2e_elex_wannacry.exe
Size 79KB
Sample260817-feyrbsem2x
SHA256 7e23d826e4d3d98bc1e6728592d1dac114f18877dfae2170a705da1318056bb0
MD5 42c6533248d090d8b362555a94fa8f2e
SHA1 90067a1861f5ee003d2190f0e6da8a5168b02383
SHA512 d4ec8b241b8654473ebe4d3db4a922d4fe0fd36eed6d8ed245094d72df61be6441e2866810b327eda6759c2cdc5b399c50ed3f6ddfdcf2f67511f02d24c11282
SSDEEP 768:4vw9816vhKQLroM4/wQzXOQ69zbjlAAX5e9zz:wEGh0oMlGizbR9Xwzz
TLSH
T1C8835CD38EAC4483FDD6697012B8D9A77C3E97C61604799B6B91FD5408A33C1EB3411E
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery execution 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 3 IoCs

resource	yara_rule
behavioral1/files/0x00030000000006d1-2.dat	family_stormser
behavioral1/files/0x001400000001daff-6.dat	family_stormser
behavioral1/files/0x000b000000016864-10.dat	family_stormser

Boot or Logon Autostart Execution: Active Setup 2 TTPs 6 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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{F4B4B36A-68F0-4d1d-8D1A-E7D9B2121C50}\stubpath = "C:\\Windows\\{F4B4B36A-68F0-4d1d-8D1A-E7D9B2121C50}.exe"	2026-08-17_42c6533248d090d8b362555a94fa8f2e_elex_wannacry.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{84CD48D2-9793-4730-9DE8-A5A824C9E368}	{F4B4B36A-68F0-4d1d-8D1A-E7D9B2121C50}.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{84CD48D2-9793-4730-9DE8-A5A824C9E368}\stubpath = "C:\\Windows\\{84CD48D2-9793-4730-9DE8-A5A824C9E368}.exe"	{F4B4B36A-68F0-4d1d-8D1A-E7D9B2121C50}.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{AB9B91D9-0DFD-428a-9ABD-1C9B3A41E57A}	{84CD48D2-9793-4730-9DE8-A5A824C9E368}.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{AB9B91D9-0DFD-428a-9ABD-1C9B3A41E57A}\stubpath = "C:\\Windows\\{AB9B91D9-0DFD-428a-9ABD-1C9B3A41E57A}.exe"	{84CD48D2-9793-4730-9DE8-A5A824C9E368}.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{F4B4B36A-68F0-4d1d-8D1A-E7D9B2121C50}	2026-08-17_42c6533248d090d8b362555a94fa8f2e_elex_wannacry.exe

Executes dropped EXE 3 IoCs

pid	Process
3620	{F4B4B36A-68F0-4d1d-8D1A-E7D9B2121C50}.exe
3940	{84CD48D2-9793-4730-9DE8-A5A824C9E368}.exe
3840	{AB9B91D9-0DFD-428a-9ABD-1C9B3A41E57A}.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\{F4B4B36A-68F0-4d1d-8D1A-E7D9B2121C50}.exe	2026-08-17_42c6533248d090d8b362555a94fa8f2e_elex_wannacry.exe
File created	C:\Windows\{84CD48D2-9793-4730-9DE8-A5A824C9E368}.exe	{F4B4B36A-68F0-4d1d-8D1A-E7D9B2121C50}.exe
File created	C:\Windows\{AB9B91D9-0DFD-428a-9ABD-1C9B3A41E57A}.exe	{84CD48D2-9793-4730-9DE8-A5A824C9E368}.exe

Executes a command shell one-liner 1 TTPs 3 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
4280	cmd.exe
632	cmd.exe
4560	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 7 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	{84CD48D2-9793-4730-9DE8-A5A824C9E368}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{AB9B91D9-0DFD-428a-9ABD-1C9B3A41E57A}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-17_42c6533248d090d8b362555a94fa8f2e_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{F4B4B36A-68F0-4d1d-8D1A-E7D9B2121C50}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	1192	2026-08-17_42c6533248d090d8b362555a94fa8f2e_elex_wannacry.exe
Token: SeIncBasePriorityPrivilege	3620	{F4B4B36A-68F0-4d1d-8D1A-E7D9B2121C50}.exe
Token: SeIncBasePriorityPrivilege	3940	{84CD48D2-9793-4730-9DE8-A5A824C9E368}.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1192 wrote to memory of 3620	1192	2026-08-17_42c6533248d090d8b362555a94fa8f2e_elex_wannacry.exe	88
PID 1192 wrote to memory of 4280	1192	2026-08-17_42c6533248d090d8b362555a94fa8f2e_elex_wannacry.exe	89
PID 3620 wrote to memory of 3940	3620	{F4B4B36A-68F0-4d1d-8D1A-E7D9B2121C50}.exe	91
PID 3620 wrote to memory of 632	3620	{F4B4B36A-68F0-4d1d-8D1A-E7D9B2121C50}.exe	92
PID 3940 wrote to memory of 3840	3940	{84CD48D2-9793-4730-9DE8-A5A824C9E368}.exe	96
PID 3940 wrote to memory of 4560	3940	{84CD48D2-9793-4730-9DE8-A5A824C9E368}.exe	97

C:\Users\Admin\AppData\Local\Temp\2026-08-17_42c6533248d090d8b362555a94fa8f2e_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-17_42c6533248d090d8b362555a94fa8f2e_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:1192
- C:\Windows\{F4B4B36A-68F0-4d1d-8D1A-E7D9B2121C50}.exe
  C:\Windows\{F4B4B36A-68F0-4d1d-8D1A-E7D9B2121C50}.exe
  2⤵
  - Boot or Logon Autostart Execution: Active Setup
  - Executes dropped EXE
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3620
- - C:\Windows\{84CD48D2-9793-4730-9DE8-A5A824C9E368}.exe
    C:\Windows\{84CD48D2-9793-4730-9DE8-A5A824C9E368}.exe
    3⤵
    - Boot or Logon Autostart Execution: Active Setup
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3940
  - - C:\Windows\{AB9B91D9-0DFD-428a-9ABD-1C9B3A41E57A}.exe
      C:\Windows\{AB9B91D9-0DFD-428a-9ABD-1C9B3A41E57A}.exe
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:3840
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c del C:\Windows\{84CD4~1.EXE > nul
      4⤵
      Executes a command shell one-liner
      System Location Discovery: System Language Discovery
      PID:4560
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c del C:\Windows\{F4B4B~1.EXE > nul
    3⤵
    - Executes a command shell one-liner
    - System Location Discovery: System Language Discovery
    PID:632
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del C:\Users\Admin\AppData\Local\Temp\2026-0~1.EXE > nul
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:4280

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

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

{84CD48D2-9793-4730-9DE8-A5A824C9E368}.exe

Path C:\Windows\{84CD48D2-9793-4730-9DE8-A5A824C9E368}.exe
Size 79KB
SHA256 0d6d9e2858b80b3b91fb05032146f9600d68ad814f411ebf9ad84c5684d8b58c
MD5 f1482b70a1fbfe8f6ac1f88fdd46b336
SHA1 45f7cdd4de2f9957b8c395c5729c9a3689218cd6
SHA512 64d0e7c716c40cbba339ebd6245a1f63b0abaab6a1bac18336f2f923d1fee21892b348d9a98fcde10249b93080b10c039993a91899a379f8a5a2db5553dfb8a3
SSDEEP 768:4vw9816vhKQLro64/wQzXOQ69zbjlAAX5e9zz:wEGh0o6lGizbR9Xwzz
TLSH
T143835CD38EAC4483FDD6697012B8DAA77C3E97C61504B99B6B91FD5408A33C1EB3411E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

{AB9B91D9-0DFD-428a-9ABD-1C9B3A41E57A}.exe

Path C:\Windows\{AB9B91D9-0DFD-428a-9ABD-1C9B3A41E57A}.exe
Size 79KB
SHA256 c102e9de03796ffb9e6eb8206b089c55311a6909d7903bb5c4ac72547b101459
MD5 dc70672ce3ba5670d17bf686bdbd85b0
SHA1 cf50a891a70742da7d07f9da9b5f7c3ac3c336dc
SHA512 6833fc79fce2d46d3def2a775c1a4e52bc074b42533e8dcf25b61bc28f892eeea156080fcc6834eb307c427078ba7a91b7977158183bccd598e878e870492100
SSDEEP 768:4vw9816vhKQLroy4/wQzXOQ69zbjlAAX5e9zz:wEGh0oylGizbR9Xwzz
TLSH
T1A6835CD38EAC4483FDD6697012B8D9A77C3E97C61604799B6B91FD5408A33C1EB3411E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

{F4B4B36A-68F0-4d1d-8D1A-E7D9B2121C50}.exe

Path C:\Windows\{F4B4B36A-68F0-4d1d-8D1A-E7D9B2121C50}.exe
Size 79KB
SHA256 8111b74f0b9e2686803efaab4da5f370194e0c415851a48912f96be181a9869c
MD5 90205599c95750bbe7090f3720566cf2
SHA1 3560657ba81545fed56c4cb7d2b522c6ade73b46
SHA512 e55ff55f9b7031da016f6d3e59e0e96c36c7ecc6fc333441862e30a98ce2e20b13ce787e00b5a3f57e2b8484a62fb0aeb7c782679bd35f8a86a821749615f70b
SSDEEP 768:4vw9816vhKQLro64/wQzXOQ69zbjlAAX5e9zz:wEGh0o6lGizbR9Xwzz
TLSH
T12F835CD38EAC4483FDE6697012B8D9A77C3E97C61604B99B6B91FD5408A33C1EB3411E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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