stormser | ee58f8275f1896dfd9a08dd604e9cc4e347ada8e3af3e28dffd146db432e0a07

General

Target
2026-08-08_5dd342c51ba1107e3df49fce8ad5a62d_elex_remcos_wannacry.exe
Size 59KB
Sample260808-ktxvsstcpa
SHA256 ee58f8275f1896dfd9a08dd604e9cc4e347ada8e3af3e28dffd146db432e0a07
MD5 5dd342c51ba1107e3df49fce8ad5a62d
SHA1 21750feeb8f5f7d5b31cbb35c73ed19f4027ef3a
SHA512 b4dda2da6f9f5843021788e7102839e2d0fd86d4dd179e8d4a947f7583b7e49a9b439e7fbd57871ee07a4523a8a25dd7d832dfa313874ea1cf00eff5df7defd4
SSDEEP 384:MbLwOs8AHsc4sMfwhKQLroL4/CFsrdHWMZ:Mvw9816vhKQLroL4/wQpWMZ
TLSH
T11B433A834F997CF2FB810175043A8BB992AB59D4D14FFE9BBF90CC194436651E83E60A
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/0x000400000001da39-2.dat	family_stormser
behavioral1/files/0x00070000000245b1-6.dat	family_stormser
behavioral1/files/0x00090000000245ba-8.dat	family_stormser

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

resource	yara_rule
behavioral1/files/0x000400000001da39-2.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/files/0x00070000000245b1-6.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/files/0x00090000000245ba-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\{9F4D035A-B720-4510-A453-4A6DA80592F8}	{2CBBBAD6-63DD-497b-AB7D-04A8F5932204}.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{9F4D035A-B720-4510-A453-4A6DA80592F8}\stubpath = "C:\\Windows\\{9F4D035A-B720-4510-A453-4A6DA80592F8}.exe"	{2CBBBAD6-63DD-497b-AB7D-04A8F5932204}.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{A23B8462-BD37-4916-82F7-817E818B3C29}	{9F4D035A-B720-4510-A453-4A6DA80592F8}.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{A23B8462-BD37-4916-82F7-817E818B3C29}\stubpath = "C:\\Windows\\{A23B8462-BD37-4916-82F7-817E818B3C29}.exe"	{9F4D035A-B720-4510-A453-4A6DA80592F8}.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{2CBBBAD6-63DD-497b-AB7D-04A8F5932204}	2026-08-08_5dd342c51ba1107e3df49fce8ad5a62d_elex_remcos_wannacry.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{2CBBBAD6-63DD-497b-AB7D-04A8F5932204}\stubpath = "C:\\Windows\\{2CBBBAD6-63DD-497b-AB7D-04A8F5932204}.exe"	2026-08-08_5dd342c51ba1107e3df49fce8ad5a62d_elex_remcos_wannacry.exe

Executes dropped EXE 3 IoCs

pid	Process
1384	{2CBBBAD6-63DD-497b-AB7D-04A8F5932204}.exe
2836	{9F4D035A-B720-4510-A453-4A6DA80592F8}.exe
1796	{A23B8462-BD37-4916-82F7-817E818B3C29}.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\{2CBBBAD6-63DD-497b-AB7D-04A8F5932204}.exe	2026-08-08_5dd342c51ba1107e3df49fce8ad5a62d_elex_remcos_wannacry.exe
File created	C:\Windows\{9F4D035A-B720-4510-A453-4A6DA80592F8}.exe	{2CBBBAD6-63DD-497b-AB7D-04A8F5932204}.exe
File created	C:\Windows\{A23B8462-BD37-4916-82F7-817E818B3C29}.exe	{9F4D035A-B720-4510-A453-4A6DA80592F8}.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
4572	cmd.exe
4088	cmd.exe
4420	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	{A23B8462-BD37-4916-82F7-817E818B3C29}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-08_5dd342c51ba1107e3df49fce8ad5a62d_elex_remcos_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{2CBBBAD6-63DD-497b-AB7D-04A8F5932204}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{9F4D035A-B720-4510-A453-4A6DA80592F8}.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	4704	2026-08-08_5dd342c51ba1107e3df49fce8ad5a62d_elex_remcos_wannacry.exe
Token: SeIncBasePriorityPrivilege	1384	{2CBBBAD6-63DD-497b-AB7D-04A8F5932204}.exe
Token: SeIncBasePriorityPrivilege	2836	{9F4D035A-B720-4510-A453-4A6DA80592F8}.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4704 wrote to memory of 1384	4704	2026-08-08_5dd342c51ba1107e3df49fce8ad5a62d_elex_remcos_wannacry.exe	88
PID 4704 wrote to memory of 4572	4704	2026-08-08_5dd342c51ba1107e3df49fce8ad5a62d_elex_remcos_wannacry.exe	89
PID 1384 wrote to memory of 2836	1384	{2CBBBAD6-63DD-497b-AB7D-04A8F5932204}.exe	95
PID 1384 wrote to memory of 4088	1384	{2CBBBAD6-63DD-497b-AB7D-04A8F5932204}.exe	96
PID 2836 wrote to memory of 1796	2836	{9F4D035A-B720-4510-A453-4A6DA80592F8}.exe	99
PID 2836 wrote to memory of 4420	2836	{9F4D035A-B720-4510-A453-4A6DA80592F8}.exe	100

C:\Users\Admin\AppData\Local\Temp\2026-08-08_5dd342c51ba1107e3df49fce8ad5a62d_elex_remcos_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-08_5dd342c51ba1107e3df49fce8ad5a62d_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:4704
- C:\Windows\{2CBBBAD6-63DD-497b-AB7D-04A8F5932204}.exe
  C:\Windows\{2CBBBAD6-63DD-497b-AB7D-04A8F5932204}.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:1384
- - C:\Windows\{9F4D035A-B720-4510-A453-4A6DA80592F8}.exe
    C:\Windows\{9F4D035A-B720-4510-A453-4A6DA80592F8}.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:2836
  - - C:\Windows\{A23B8462-BD37-4916-82F7-817E818B3C29}.exe
      C:\Windows\{A23B8462-BD37-4916-82F7-817E818B3C29}.exe
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:1796
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c del C:\Windows\{9F4D0~1.EXE > nul
      4⤵
      Executes a command shell one-liner
      System Location Discovery: System Language Discovery
      PID:4420
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c del C:\Windows\{2CBBB~1.EXE > nul
    3⤵
    - Executes a command shell one-liner
    - System Location Discovery: System Language Discovery
    PID:4088
- 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:4572

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

{2CBBBAD6-63DD-497b-AB7D-04A8F5932204}.exe

Path C:\Windows\{2CBBBAD6-63DD-497b-AB7D-04A8F5932204}.exe
Size 59KB
SHA256 5d444bb0254287f9ceaaf21b915c764bed7ce063d90c6dbd61b0b8d641cbea5d
MD5 8655c4b7609ef4ff18fd4c93e9b1873f
SHA1 d423859c384723ab7a0fad06fb96cdc1e6aec73c
SHA512 aa69bb2fd8fd49cefe90cffafe5fbc05d03d87651d15c8718c370552229385248ca5967cf303bc362d7ab5647754075e226a95fb5b077af01b3594c7d7f48c08
SSDEEP 384:MbLwOs8AHsc4sMfwhKQLro24/CFsrdHWMZ:Mvw9816vhKQLro24/wQpWMZ
TLSH
T16A433B834F997CF2FB810175043A8B7992AB59D4D14FFE9BBF90CC194436651E83E60A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

{9F4D035A-B720-4510-A453-4A6DA80592F8}.exe

Path C:\Windows\{9F4D035A-B720-4510-A453-4A6DA80592F8}.exe
Size 59KB
SHA256 409e1ab03c42c56707e96da335735104ba59b89b1586509d20220c1ad8157170
MD5 9f18a2f844047fec6a5f564e37af54a2
SHA1 f9ea26b3e7664b571fa3af736962d54be50e20bf
SHA512 487abc6e52ad64810304eb215c02ffbd6c91463918cc25042f40c4d01182b18b8d1238dc2bdde7d6804738627dc8146a9ceae90043d5c6f8dd5bc8abfd937d23
SSDEEP 384:MbLwOs8AHsc4sMfwhKQLror4/CFsrdHWMZ:Mvw9816vhKQLror4/wQpWMZ
TLSH
T12B433B834F997CF2FB810175043A8B7992AB59D4D14FFE9BBF90CC194436651E83E60A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

{A23B8462-BD37-4916-82F7-817E818B3C29}.exe

Path C:\Windows\{A23B8462-BD37-4916-82F7-817E818B3C29}.exe
Size 59KB
SHA256 8efa16fafeaf7f634831feff73a82768fc3d399c7ad9259b5bab9f793a3c080b
MD5 263326fa08fc7690c668a660bb085169
SHA1 9ced763374ec1a709b3d726e8bc055ceefe557ec
SHA512 136095f140dd8cb5e0c205d2f78fbd32b568998a183955a6cb94d3310d2dc227d4bd6b4d5743db9fa45f36d0a51d581fab606d010b9b6090f5aa13535b6eb375
SSDEEP 384:MbLwOs8AHsc4sMfwhKQLroP4/CFsrdHWMZ:Mvw9816vhKQLroP4/wQpWMZ
TLSH
T170433B834F997CF2FB810175043A8BB992AB59D4D14FFE9BBF90CC194436651E83E60A
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