stormser | d70763f9f87e73881b86354582dc48abd98d1940f1a977c6639648d07bbf2ec1

General

Target
2026-11-02_bc7de3993f9c20db9f20087123730a3f_elex_remcos_wannacry.exe
Size 60KB
Sample261103-af4fbage96
SHA256 d70763f9f87e73881b86354582dc48abd98d1940f1a977c6639648d07bbf2ec1
MD5 bc7de3993f9c20db9f20087123730a3f
SHA1 41f9b71e1f9da99c466f5fda99259d5561f52165
SHA512 8d183fc02aae434833119f5e34e8a3e4e41f3b1db1bfccf57de6b822d16cca1590e8d0142a9eb3c69ca72c822cffc26b823207b78497ed63c2578de0625b3a96
SSDEEP 384:vbLwOs8AHsc4sMfwhKQLrosp4/CFsrdHWMZ:vvw9816vhKQLrosp4/wQpWMZ
TLSH
T121533B830F997CF2F7810175043A8B79926B59D4D14FFE9BBF90CC194436651E83E60A
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 4 IoCs

resource	yara_rule
behavioral1/files/0x000f0000000245c3-2.dat	family_stormser
behavioral1/files/0x00080000000245b4-5.dat	family_stormser
behavioral1/files/0x00080000000245cb-10.dat	family_stormser
behavioral1/files/0x00090000000245b4-14.dat	family_stormser

Detects Windows executables referencing non-Windows User-Agents 4 IoCs

resource	yara_rule
behavioral1/files/0x000f0000000245c3-2.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/files/0x00080000000245b4-5.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/files/0x00080000000245cb-10.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/files/0x00090000000245b4-14.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Boot or Logon Autostart Execution: Active Setup 2 TTPs 8 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\{DEBCF032-0151-4959-8945-2B0550FF52AC}\stubpath = "C:\\Windows\\{DEBCF032-0151-4959-8945-2B0550FF52AC}.exe"	2026-11-02_bc7de3993f9c20db9f20087123730a3f_elex_remcos_wannacry.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{94A46C3A-CC08-423c-8CDF-1991F786A911}	{DEBCF032-0151-4959-8945-2B0550FF52AC}.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{94A46C3A-CC08-423c-8CDF-1991F786A911}\stubpath = "C:\\Windows\\{94A46C3A-CC08-423c-8CDF-1991F786A911}.exe"	{DEBCF032-0151-4959-8945-2B0550FF52AC}.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{BEC8114F-B237-443b-94BE-52C362B32459}	{94A46C3A-CC08-423c-8CDF-1991F786A911}.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{BEC8114F-B237-443b-94BE-52C362B32459}\stubpath = "C:\\Windows\\{BEC8114F-B237-443b-94BE-52C362B32459}.exe"	{94A46C3A-CC08-423c-8CDF-1991F786A911}.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{E891DFB4-FC7C-4def-A196-6CE3148419BA}	{BEC8114F-B237-443b-94BE-52C362B32459}.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{E891DFB4-FC7C-4def-A196-6CE3148419BA}\stubpath = "C:\\Windows\\{E891DFB4-FC7C-4def-A196-6CE3148419BA}.exe"	{BEC8114F-B237-443b-94BE-52C362B32459}.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{DEBCF032-0151-4959-8945-2B0550FF52AC}	2026-11-02_bc7de3993f9c20db9f20087123730a3f_elex_remcos_wannacry.exe

Executes dropped EXE 4 IoCs

pid	Process
696	{DEBCF032-0151-4959-8945-2B0550FF52AC}.exe
6108	{94A46C3A-CC08-423c-8CDF-1991F786A911}.exe
3536	{BEC8114F-B237-443b-94BE-52C362B32459}.exe
4004	{E891DFB4-FC7C-4def-A196-6CE3148419BA}.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\{E891DFB4-FC7C-4def-A196-6CE3148419BA}.exe	{BEC8114F-B237-443b-94BE-52C362B32459}.exe
File created	C:\Windows\{DEBCF032-0151-4959-8945-2B0550FF52AC}.exe	2026-11-02_bc7de3993f9c20db9f20087123730a3f_elex_remcos_wannacry.exe
File created	C:\Windows\{94A46C3A-CC08-423c-8CDF-1991F786A911}.exe	{DEBCF032-0151-4959-8945-2B0550FF52AC}.exe
File created	C:\Windows\{BEC8114F-B237-443b-94BE-52C362B32459}.exe	{94A46C3A-CC08-423c-8CDF-1991F786A911}.exe

Executes a command shell one-liner 1 TTPs 4 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
4536	cmd.exe
4308	cmd.exe
5988	cmd.exe
4380	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 9 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	{BEC8114F-B237-443b-94BE-52C362B32459}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{E891DFB4-FC7C-4def-A196-6CE3148419BA}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-11-02_bc7de3993f9c20db9f20087123730a3f_elex_remcos_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{DEBCF032-0151-4959-8945-2B0550FF52AC}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{94A46C3A-CC08-423c-8CDF-1991F786A911}.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	3864	2026-11-02_bc7de3993f9c20db9f20087123730a3f_elex_remcos_wannacry.exe
Token: SeIncBasePriorityPrivilege	696	{DEBCF032-0151-4959-8945-2B0550FF52AC}.exe
Token: SeIncBasePriorityPrivilege	6108	{94A46C3A-CC08-423c-8CDF-1991F786A911}.exe
Token: SeIncBasePriorityPrivilege	3536	{BEC8114F-B237-443b-94BE-52C362B32459}.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3864 wrote to memory of 696	3864	2026-11-02_bc7de3993f9c20db9f20087123730a3f_elex_remcos_wannacry.exe	93
PID 3864 wrote to memory of 4308	3864	2026-11-02_bc7de3993f9c20db9f20087123730a3f_elex_remcos_wannacry.exe	94
PID 696 wrote to memory of 6108	696	{DEBCF032-0151-4959-8945-2B0550FF52AC}.exe	95
PID 696 wrote to memory of 5988	696	{DEBCF032-0151-4959-8945-2B0550FF52AC}.exe	96
PID 6108 wrote to memory of 3536	6108	{94A46C3A-CC08-423c-8CDF-1991F786A911}.exe	100
PID 6108 wrote to memory of 4380	6108	{94A46C3A-CC08-423c-8CDF-1991F786A911}.exe	101
PID 3536 wrote to memory of 4004	3536	{BEC8114F-B237-443b-94BE-52C362B32459}.exe	102
PID 3536 wrote to memory of 4536	3536	{BEC8114F-B237-443b-94BE-52C362B32459}.exe	103

C:\Users\Admin\AppData\Local\Temp\2026-11-02_bc7de3993f9c20db9f20087123730a3f_elex_remcos_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-11-02_bc7de3993f9c20db9f20087123730a3f_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:3864
- C:\Windows\{DEBCF032-0151-4959-8945-2B0550FF52AC}.exe
  C:\Windows\{DEBCF032-0151-4959-8945-2B0550FF52AC}.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:696
- - C:\Windows\{94A46C3A-CC08-423c-8CDF-1991F786A911}.exe
    C:\Windows\{94A46C3A-CC08-423c-8CDF-1991F786A911}.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:6108
  - - C:\Windows\{BEC8114F-B237-443b-94BE-52C362B32459}.exe
      C:\Windows\{BEC8114F-B237-443b-94BE-52C362B32459}.exe
      4⤵
      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:3536
    - - C:\Windows\{E891DFB4-FC7C-4def-A196-6CE3148419BA}.exe
        
        C:\Windows\{E891DFB4-FC7C-4def-A196-6CE3148419BA}.exe
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        
        PID:4004
    - - C:\Windows\SysWOW64\cmd.exe
        
        C:\Windows\system32\cmd.exe /c del C:\Windows\{BEC81~1.EXE > nul
        5⤵
        Executes a command shell one-liner
        System Location Discovery: System Language Discovery
        
        PID:4536
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c del C:\Windows\{94A46~1.EXE > nul
      4⤵
      Executes a command shell one-liner
      System Location Discovery: System Language Discovery
      PID:4380
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c del C:\Windows\{DEBCF~1.EXE > nul
    3⤵
    - Executes a command shell one-liner
    - System Location Discovery: System Language Discovery
    PID:5988
- 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:4308

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

{94A46C3A-CC08-423c-8CDF-1991F786A911}.exe

Path C:\Windows\{94A46C3A-CC08-423c-8CDF-1991F786A911}.exe
Size 60KB
SHA256 13f8edcb6ca56df67b2d84fb194dcfd989fa7fbe1560d09a42d36921c8ed0e3a
MD5 15b4c1cb5275cca943a73b9905de24a4
SHA1 3bab7509a7307f7f8d9eb483d0c99905cacad8b2
SHA512 89e940afb0bcf4ce364de650b8f94bdfc37e5538fbdbada0e04445654250d133a810a8b4af049eb604c3fc847c97bf47b448c45d43f93ddbd1fdc04f5caa6030
SSDEEP 384:vbLwOs8AHsc4sMfwhKQLroc4/CFsrdHWMZ:vvw9816vhKQLroc4/wQpWMZ
TLSH
T1A3533B830F997CF2FB810175047A8BB992AB59D4D14FFE9BBF90CC194436651E83E60A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

{BEC8114F-B237-443b-94BE-52C362B32459}.exe

Path C:\Windows\{BEC8114F-B237-443b-94BE-52C362B32459}.exe
Size 60KB
SHA256 1cb7bbc3a4dbb039163584453d66cb463e69854599707a17305a8d1cd746d831
MD5 e58f5da7cb3c489b405241e6640b1af0
SHA1 a75b439728b13fcfc9687fe79a9501729aa337e1
SHA512 abecbe26a13f49322ce981585687b4852e379f9ee31b4a2d82b0646c8cb68df24abe5eed06f43b4a40f9b5cfd6f2ff9de7b0535556275f23209a56d22094092f
SSDEEP 384:vbLwOs8AHsc4sMfwhKQLroy4/CFsrdHWMZ:vvw9816vhKQLroy4/wQpWMZ
TLSH
T174533B830F997CF2FB810175043A8B79926B59D4D14FFE9BBF90CC194436651E83E60A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

{DEBCF032-0151-4959-8945-2B0550FF52AC}.exe

Path C:\Windows\{DEBCF032-0151-4959-8945-2B0550FF52AC}.exe
Size 60KB
SHA256 f120eafccbf9e755bd7054df9d431c81bb44b4f04471cbd4f7379090181e61b2
MD5 d76e0862a5ab213357f1cbe944a4270d
SHA1 cf47d21a8bbf3e54a82938fadb251c0d42bb5dc3
SHA512 452cbcba06500bbb1ea672dc378fb8172d805a5067b9cd5ef455c3b0eae002443b903aae851d09f8e75450c46387dbab78ef98d5c92bac921a5e9533f9ba3885
SSDEEP 384:vbLwOs8AHsc4sMfwhKQLroH4/CFsrdHWMZ:vvw9816vhKQLroH4/wQpWMZ
TLSH
T148534B830F997CF2FB810175047A8BB992AB59D4D14FFE9BBF90CC194436651E83E60A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

{E891DFB4-FC7C-4def-A196-6CE3148419BA}.exe

Path C:\Windows\{E891DFB4-FC7C-4def-A196-6CE3148419BA}.exe
Size 60KB
SHA256 53f5e4434125a13ccf9ccad1cab9005ac8fe6874074c857dd52fc2a4197b5e71
MD5 a6da4dc26a55c041e56d053272762bf8
SHA1 ef88d89a3d8573520b36a093eec47e3bf5493cd7
SHA512 707d642661d3eb6cd98b2cf749e30be63c2dc65982029c7add21c9bc989dfb56f97eb1b78a5edec168af7829258022c619f3d33329ef4f3775b7def1a5aa46dc
SSDEEP 384:vbLwOs8AHsc4sMfwhKQLro04/CFsrdHWMZ:vvw9816vhKQLro04/wQpWMZ
TLSH
T156533B834F997CF2FB810175043A8B79926B59D4D14FFE9BBF90CC194436651E83E60A
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