stormser | a686652ba90b9c66c4652a855434ea1041a688692b3a1026a3c8d152471e00fc

General

Target
2026-08-12_0845844523fafc9f960732ef9f85393b_elex_remcos_wannacry.exe
Size 59KB
Sample260812-c5akmsab39
SHA256 a686652ba90b9c66c4652a855434ea1041a688692b3a1026a3c8d152471e00fc
MD5 0845844523fafc9f960732ef9f85393b
SHA1 1aba90231a0bb308b21a853c7fe8b28522cb158c
SHA512 b3cbff2800e635ddb01c2dee0eebc86a8d354a2880d11fe0aae04f108821844ed2abd972bb90880675aa8692d158c7fd33d5c3eb3e7c7586ae01aae5166f10ed
SSDEEP 384:MbLwOs8AHsc4sMfwhKQLroG4/CFsrdHWMZ:Mvw9816vhKQLroG4/wQpWMZ
TLSH
T188433B830F997CF2FB810175047A8B7992AB59D4D14FFE9BBF90CC194436651E83E60A
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/0x0003000000000703-2.dat	family_stormser
behavioral1/files/0x000400000001e69e-6.dat	family_stormser
behavioral1/files/0x00080000000168fd-8.dat	family_stormser

Detects Windows executables referencing non-Windows User-Agents 3 IoCs

resource	yara_rule
behavioral1/files/0x0003000000000703-2.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/files/0x000400000001e69e-6.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/files/0x00080000000168fd-8.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

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
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{69B64AA1-502A-48b7-800A-B6818A3D42F4}	2026-08-12_0845844523fafc9f960732ef9f85393b_elex_remcos_wannacry.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{69B64AA1-502A-48b7-800A-B6818A3D42F4}\stubpath = "C:\\Windows\\{69B64AA1-502A-48b7-800A-B6818A3D42F4}.exe"	2026-08-12_0845844523fafc9f960732ef9f85393b_elex_remcos_wannacry.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{A61BE888-4AC4-4161-AE69-CDFCF00E3E94}	{69B64AA1-502A-48b7-800A-B6818A3D42F4}.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{A61BE888-4AC4-4161-AE69-CDFCF00E3E94}\stubpath = "C:\\Windows\\{A61BE888-4AC4-4161-AE69-CDFCF00E3E94}.exe"	{69B64AA1-502A-48b7-800A-B6818A3D42F4}.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{44A2E237-6170-4539-870C-F6628CBE482E}	{A61BE888-4AC4-4161-AE69-CDFCF00E3E94}.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{44A2E237-6170-4539-870C-F6628CBE482E}\stubpath = "C:\\Windows\\{44A2E237-6170-4539-870C-F6628CBE482E}.exe"	{A61BE888-4AC4-4161-AE69-CDFCF00E3E94}.exe

Executes dropped EXE 3 IoCs

pid	Process
1604	{69B64AA1-502A-48b7-800A-B6818A3D42F4}.exe
1260	{A61BE888-4AC4-4161-AE69-CDFCF00E3E94}.exe
1052	{44A2E237-6170-4539-870C-F6628CBE482E}.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\{69B64AA1-502A-48b7-800A-B6818A3D42F4}.exe	2026-08-12_0845844523fafc9f960732ef9f85393b_elex_remcos_wannacry.exe
File created	C:\Windows\{A61BE888-4AC4-4161-AE69-CDFCF00E3E94}.exe	{69B64AA1-502A-48b7-800A-B6818A3D42F4}.exe
File created	C:\Windows\{44A2E237-6170-4539-870C-F6628CBE482E}.exe	{A61BE888-4AC4-4161-AE69-CDFCF00E3E94}.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
3580	cmd.exe
3736	cmd.exe
4060	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-12_0845844523fafc9f960732ef9f85393b_elex_remcos_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{69B64AA1-502A-48b7-800A-B6818A3D42F4}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{A61BE888-4AC4-4161-AE69-CDFCF00E3E94}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{44A2E237-6170-4539-870C-F6628CBE482E}.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	536	2026-08-12_0845844523fafc9f960732ef9f85393b_elex_remcos_wannacry.exe
Token: SeIncBasePriorityPrivilege	1604	{69B64AA1-502A-48b7-800A-B6818A3D42F4}.exe
Token: SeIncBasePriorityPrivilege	1260	{A61BE888-4AC4-4161-AE69-CDFCF00E3E94}.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 536 wrote to memory of 1604	536	2026-08-12_0845844523fafc9f960732ef9f85393b_elex_remcos_wannacry.exe	88
PID 536 wrote to memory of 3580	536	2026-08-12_0845844523fafc9f960732ef9f85393b_elex_remcos_wannacry.exe	89
PID 1604 wrote to memory of 1260	1604	{69B64AA1-502A-48b7-800A-B6818A3D42F4}.exe	97
PID 1604 wrote to memory of 3736	1604	{69B64AA1-502A-48b7-800A-B6818A3D42F4}.exe	98
PID 1260 wrote to memory of 1052	1260	{A61BE888-4AC4-4161-AE69-CDFCF00E3E94}.exe	104
PID 1260 wrote to memory of 4060	1260	{A61BE888-4AC4-4161-AE69-CDFCF00E3E94}.exe	105

C:\Users\Admin\AppData\Local\Temp\2026-08-12_0845844523fafc9f960732ef9f85393b_elex_remcos_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-12_0845844523fafc9f960732ef9f85393b_elex_remcos_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:536
- C:\Windows\{69B64AA1-502A-48b7-800A-B6818A3D42F4}.exe
  C:\Windows\{69B64AA1-502A-48b7-800A-B6818A3D42F4}.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:1604
- - C:\Windows\{A61BE888-4AC4-4161-AE69-CDFCF00E3E94}.exe
    C:\Windows\{A61BE888-4AC4-4161-AE69-CDFCF00E3E94}.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:1260
  - - C:\Windows\{44A2E237-6170-4539-870C-F6628CBE482E}.exe
      C:\Windows\{44A2E237-6170-4539-870C-F6628CBE482E}.exe
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:1052
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c del C:\Windows\{A61BE~1.EXE > nul
      4⤵
      Executes a command shell one-liner
      System Location Discovery: System Language Discovery
      PID:4060
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c del C:\Windows\{69B64~1.EXE > nul
    3⤵
    - Executes a command shell one-liner
    - System Location Discovery: System Language Discovery
    PID:3736
- 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:3580

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

{44A2E237-6170-4539-870C-F6628CBE482E}.exe

Path C:\Windows\{44A2E237-6170-4539-870C-F6628CBE482E}.exe
Size 59KB
SHA256 6e8184deb61774b33753e1643af15f9cf3f4b81e274ca6fd5eed635e646056da
MD5 b679594221e98f1e7d4a677b5a11fc21
SHA1 94875608b7613ea4387d2029883e7faae2f038fd
SHA512 a01450e9f80693649803e6e4f41d85020f519d3a85ed516bdf149d4a7d037357df20f5f4ce1ed1735ff792b99ba68ffeb7a884f8ff8c72eab1cab3f6ee50493f
SSDEEP 384:MbLwOs8AHsc4sMfwhKQLro54/CFsrdHWMZ:Mvw9816vhKQLro54/wQpWMZ
TLSH
T18A433B830F997CF2FB810175043A8BB992AB59D4D14FFE9BBF90CC194436651E83E60A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

{69B64AA1-502A-48b7-800A-B6818A3D42F4}.exe

Path C:\Windows\{69B64AA1-502A-48b7-800A-B6818A3D42F4}.exe
Size 59KB
SHA256 24ea5b3ebf96e71c64e98831f1ab4b989f4aa158e67ff5e88e1a2861316881d3
MD5 2de5fceb474be2b0aff4c2c86c4cfc9f
SHA1 67c9b42becba1aafd5d673a6fc46b22a8f846559
SHA512 d310322280fb6f4a91654e7e88186d2a2af55a4524e76165fcd3069defee30def68ce1775c51c7729aa5321116ee08ac492f17dbcbfec070a8d24e7d367a0658
SSDEEP 384:MbLwOs8AHsc4sMfwhKQLrok4/CFsrdHWMZ:Mvw9816vhKQLrok4/wQpWMZ
TLSH
T103433B830F997CF2FB810175043A8B7992AB59D4D14FFE9BBF90CC194436651E83E60A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

{A61BE888-4AC4-4161-AE69-CDFCF00E3E94}.exe

Path C:\Windows\{A61BE888-4AC4-4161-AE69-CDFCF00E3E94}.exe
Size 59KB
SHA256 2102cfebe0f970982bff342fb67e685778566fd06400df7a82dfabcfb61f2b13
MD5 73c42d3e76dd13c0d98b118056c5c5b6
SHA1 2b00e0bfc5b25f459c11f4b5f01f13b0a8394613
SHA512 80780afe5f065b8e143dd269f50353b4620ce723e2495387c5794564a13be32fa023a02106c672b654d2ab9b1c41423c9cb1195928103a2c4c050020aa9f9393
SSDEEP 384:MbLwOs8AHsc4sMfwhKQLroJ4/CFsrdHWMZ:Mvw9816vhKQLroJ4/wQpWMZ
TLSH
T159433B830F997CF2FB810175043A8B7992AB59D4D14FFE9BBF90CC194436651E83E60A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads