stormser | fe0b74db6e2c75444249091be6ea0936b3cc459ec51beb721642b3e03a1cf7f6

General

Target
2026-10-28_009ed940f1c46e904a99ec8e82e5a7c4_elex_remcos_wannacry.exe
Size 76KB
Sample261030-nvf58ayte1
SHA256 fe0b74db6e2c75444249091be6ea0936b3cc459ec51beb721642b3e03a1cf7f6
MD5 009ed940f1c46e904a99ec8e82e5a7c4
SHA1 e27387f49435297fb4b8f3d978c62561864ef028
SHA512 7b9f2e3f43327caf8e1cac8f89fab333d2771eca1f726d156246793c04e1ca63404e86089e38315620f049663d3779ca768f04abb21b89bf8ce8a64ccb92f090
SSDEEP 768:vvw9816vhKQLroZ/4/wQxWMZQcpFM1FgDagXP2TyS1tl7lfqvocqcdT3WVd:nEGh0oZ/lwWMZQcpmgDagIyS1loL7Wr
TLSH
T1F1735B02A684B5F2EBAC0134B19F0FBE963795B1C0D9682F6F634DA55862C63F431E17
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 2 IoCs

resource	yara_rule
behavioral1/files/0x0007000000024302-2.dat	family_stormser
behavioral1/files/0x00080000000242f2-5.dat	family_stormser

Custom signature

Detects Windows executables referencing non-Windows User-Agents 2 IoCs

resource	yara_rule
behavioral1/files/0x0007000000024302-2.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/files/0x00080000000242f2-5.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Boot or Logon Autostart Execution: Active Setup 2 TTPs 4 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\{2CD818AB-0AEA-4eaf-9DE8-E81180382496}	2026-10-28_009ed940f1c46e904a99ec8e82e5a7c4_elex_remcos_wannacry.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{2CD818AB-0AEA-4eaf-9DE8-E81180382496}\stubpath = "C:\\Windows\\{2CD818AB-0AEA-4eaf-9DE8-E81180382496}.exe"	2026-10-28_009ed940f1c46e904a99ec8e82e5a7c4_elex_remcos_wannacry.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{C4F99F2E-AAB1-47cb-A92C-CCB8EBE2E362}	{2CD818AB-0AEA-4eaf-9DE8-E81180382496}.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{C4F99F2E-AAB1-47cb-A92C-CCB8EBE2E362}\stubpath = "C:\\Windows\\{C4F99F2E-AAB1-47cb-A92C-CCB8EBE2E362}.exe"	{2CD818AB-0AEA-4eaf-9DE8-E81180382496}.exe

Executes dropped EXE 2 IoCs

pid	Process
1816	{2CD818AB-0AEA-4eaf-9DE8-E81180382496}.exe
4336	{C4F99F2E-AAB1-47cb-A92C-CCB8EBE2E362}.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\{2CD818AB-0AEA-4eaf-9DE8-E81180382496}.exe	2026-10-28_009ed940f1c46e904a99ec8e82e5a7c4_elex_remcos_wannacry.exe
File created	C:\Windows\{C4F99F2E-AAB1-47cb-A92C-CCB8EBE2E362}.exe	{2CD818AB-0AEA-4eaf-9DE8-E81180382496}.exe

Executes a command shell one-liner 1 TTPs 2 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
3192	cmd.exe
4408	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 5 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{C4F99F2E-AAB1-47cb-A92C-CCB8EBE2E362}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-10-28_009ed940f1c46e904a99ec8e82e5a7c4_elex_remcos_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{2CD818AB-0AEA-4eaf-9DE8-E81180382496}.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	1440	2026-10-28_009ed940f1c46e904a99ec8e82e5a7c4_elex_remcos_wannacry.exe
Token: SeIncBasePriorityPrivilege	1816	{2CD818AB-0AEA-4eaf-9DE8-E81180382496}.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1440 wrote to memory of 1816	1440	2026-10-28_009ed940f1c46e904a99ec8e82e5a7c4_elex_remcos_wannacry.exe	90
PID 1440 wrote to memory of 3192	1440	2026-10-28_009ed940f1c46e904a99ec8e82e5a7c4_elex_remcos_wannacry.exe	91
PID 1816 wrote to memory of 4336	1816	{2CD818AB-0AEA-4eaf-9DE8-E81180382496}.exe	92
PID 1816 wrote to memory of 4408	1816	{2CD818AB-0AEA-4eaf-9DE8-E81180382496}.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-10-28_009ed940f1c46e904a99ec8e82e5a7c4_elex_remcos_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-28_009ed940f1c46e904a99ec8e82e5a7c4_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:1440
- C:\Windows\{2CD818AB-0AEA-4eaf-9DE8-E81180382496}.exe
  C:\Windows\{2CD818AB-0AEA-4eaf-9DE8-E81180382496}.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:1816
- - C:\Windows\{C4F99F2E-AAB1-47cb-A92C-CCB8EBE2E362}.exe
    C:\Windows\{C4F99F2E-AAB1-47cb-A92C-CCB8EBE2E362}.exe
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4336
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c del C:\Windows\{2CD81~1.EXE > nul
    3⤵
    - Executes a command shell one-liner
    - System Location Discovery: System Language Discovery
    PID:4408
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del C:\Users\Admin\AppData\Local\Temp\2026-1~1.EXE > nul
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:3192

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

{2CD818AB-0AEA-4eaf-9DE8-E81180382496}.exe

Path C:\Windows\{2CD818AB-0AEA-4eaf-9DE8-E81180382496}.exe
Size 76KB
SHA256 dd87e82db5570a5a97a31a91520a20ea4ec87593fac318919381a77e68dec406
MD5 83309f07968d375c9706876cd3724b5c
SHA1 a2d36a1148fb945865aad15ac44b19cf5aec4e15
SHA512 a1c94407930bc52e19b6414c1a071836d24fe993d157a4bf40010c284ebac9223977907a71b794bc9f9e1eb04d782320035fa7a4cab8a89bb5293640f3f996b2
SSDEEP 768:vvw9816vhKQLror/4/wQxWMZQcpFM1FgDagXP2TyS1tl7lfqvocqcdT3WVd:nEGh0or/lwWMZQcpmgDagIyS1loL7Wr
TLSH
T155735B02A684B5F2EBAC0134B19F0F7E963796B1C0D9682F6F634DA55462C63F431E17
MD5 SHA1 SHA512 SSDEEP TLSH

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{C4F99F2E-AAB1-47cb-A92C-CCB8EBE2E362}.exe

Path C:\Windows\{C4F99F2E-AAB1-47cb-A92C-CCB8EBE2E362}.exe
Size 76KB
SHA256 8fe09f8ed0058e85e7b8e75fdeb5e3c0974de65a89c46d6774c1dba8713d39b0
MD5 df4bdbceebb0b7f154894fd4e13f0f96
SHA1 ffa3cacab52038c6315fa79c9f7d8e4741112564
SHA512 f709c6515c003e0c026addc948becd4282421bd547e95431d9074e3ffd6c851053ad7664b835ed4ebe21747c0270afed49b11e955df08f42080090ca54ec740a
SSDEEP 768:vvw9816vhKQLroo/4/wQxWMZQcpFM1FgDagXP2TyS1tl7lfqvocqcdT3WVd:nEGh0oo/lwWMZQcpmgDagIyS1loL7Wr
TLSH
T15E735B02A684B5F2EBAC0134B19F0F7E963796B1C0D9682F6F634DA55462C63F431E17
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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