stormser | f9bd4ae7831a2071d1c7a6f26f38005e47d3169a1a97bc35a55aae7ff1c8357e

General

Target
2026-08-01_9afbde2486db2cfe0316cc783d75e46a_elex_remcos_wannacry.exe
Size 84KB
Sample260802-emdkpatgpf
SHA256 f9bd4ae7831a2071d1c7a6f26f38005e47d3169a1a97bc35a55aae7ff1c8357e
MD5 9afbde2486db2cfe0316cc783d75e46a
SHA1 fb4bbce6915b9a242dedc08d93f80479a5bca403
SHA512 b574a82f29d605cdba8f0b23e38f9b6f304f81e8c3ff116126c328dc935055b44082f6051bf4b94e081cc8207a9eb27f4591ee5c520de98a59332da50fa7643b
SSDEEP 384:6jibD2liXsafEHsc4g6FW6e/hHjNU4/CFsrdHWMZ:6jif24cafxi6FW7/hHjNU4/wQpWMZ
TLSH
T10F832A435F9A7CF2F7911175046A8E79A76B89D4D1AEFE9FBF80CC084462641F83A306
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/0x00070000000244ae-2.dat	family_stormser
behavioral1/files/0x00080000000244a0-6.dat	family_stormser
behavioral1/files/0x000400000001e101-8.dat	family_stormser

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

resource	yara_rule
behavioral1/files/0x00070000000244ae-2.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/files/0x00080000000244a0-6.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/files/0x000400000001e101-8.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\{F5FB1D6C-C414-46f9-9307-F925ED8343CC}	{678953DF-FFFD-4ad3-A152-7973632DAA75}.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{F5FB1D6C-C414-46f9-9307-F925ED8343CC}\stubpath = "C:\\Windows\\{F5FB1D6C-C414-46f9-9307-F925ED8343CC}.exe"	{678953DF-FFFD-4ad3-A152-7973632DAA75}.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{8B5CCD27-49C7-4744-AB26-A95F09D24A05}	{F5FB1D6C-C414-46f9-9307-F925ED8343CC}.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{8B5CCD27-49C7-4744-AB26-A95F09D24A05}\stubpath = "C:\\Windows\\{8B5CCD27-49C7-4744-AB26-A95F09D24A05}.exe"	{F5FB1D6C-C414-46f9-9307-F925ED8343CC}.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{678953DF-FFFD-4ad3-A152-7973632DAA75}	2026-08-01_9afbde2486db2cfe0316cc783d75e46a_elex_remcos_wannacry.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{678953DF-FFFD-4ad3-A152-7973632DAA75}\stubpath = "C:\\Windows\\{678953DF-FFFD-4ad3-A152-7973632DAA75}.exe"	2026-08-01_9afbde2486db2cfe0316cc783d75e46a_elex_remcos_wannacry.exe

Executes dropped EXE 3 IoCs

pid	Process
400	{678953DF-FFFD-4ad3-A152-7973632DAA75}.exe
2156	{F5FB1D6C-C414-46f9-9307-F925ED8343CC}.exe
3800	{8B5CCD27-49C7-4744-AB26-A95F09D24A05}.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\{678953DF-FFFD-4ad3-A152-7973632DAA75}.exe	2026-08-01_9afbde2486db2cfe0316cc783d75e46a_elex_remcos_wannacry.exe
File created	C:\Windows\{F5FB1D6C-C414-46f9-9307-F925ED8343CC}.exe	{678953DF-FFFD-4ad3-A152-7973632DAA75}.exe
File created	C:\Windows\{8B5CCD27-49C7-4744-AB26-A95F09D24A05}.exe	{F5FB1D6C-C414-46f9-9307-F925ED8343CC}.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
4372	cmd.exe
2340	cmd.exe
4500	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	{F5FB1D6C-C414-46f9-9307-F925ED8343CC}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{8B5CCD27-49C7-4744-AB26-A95F09D24A05}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-01_9afbde2486db2cfe0316cc783d75e46a_elex_remcos_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{678953DF-FFFD-4ad3-A152-7973632DAA75}.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	1688	2026-08-01_9afbde2486db2cfe0316cc783d75e46a_elex_remcos_wannacry.exe
Token: SeIncBasePriorityPrivilege	400	{678953DF-FFFD-4ad3-A152-7973632DAA75}.exe
Token: SeIncBasePriorityPrivilege	2156	{F5FB1D6C-C414-46f9-9307-F925ED8343CC}.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1688 wrote to memory of 400	1688	2026-08-01_9afbde2486db2cfe0316cc783d75e46a_elex_remcos_wannacry.exe	93
PID 1688 wrote to memory of 4372	1688	2026-08-01_9afbde2486db2cfe0316cc783d75e46a_elex_remcos_wannacry.exe	94
PID 400 wrote to memory of 2156	400	{678953DF-FFFD-4ad3-A152-7973632DAA75}.exe	95
PID 400 wrote to memory of 2340	400	{678953DF-FFFD-4ad3-A152-7973632DAA75}.exe	96
PID 2156 wrote to memory of 3800	2156	{F5FB1D6C-C414-46f9-9307-F925ED8343CC}.exe	99
PID 2156 wrote to memory of 4500	2156	{F5FB1D6C-C414-46f9-9307-F925ED8343CC}.exe	100

C:\Users\Admin\AppData\Local\Temp\2026-08-01_9afbde2486db2cfe0316cc783d75e46a_elex_remcos_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-01_9afbde2486db2cfe0316cc783d75e46a_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:1688
- C:\Windows\{678953DF-FFFD-4ad3-A152-7973632DAA75}.exe
  C:\Windows\{678953DF-FFFD-4ad3-A152-7973632DAA75}.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:400
- - C:\Windows\{F5FB1D6C-C414-46f9-9307-F925ED8343CC}.exe
    C:\Windows\{F5FB1D6C-C414-46f9-9307-F925ED8343CC}.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:2156
  - - C:\Windows\{8B5CCD27-49C7-4744-AB26-A95F09D24A05}.exe
      C:\Windows\{8B5CCD27-49C7-4744-AB26-A95F09D24A05}.exe
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:3800
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c del C:\Windows\{F5FB1~1.EXE > nul
      4⤵
      Executes a command shell one-liner
      System Location Discovery: System Language Discovery
      PID:4500
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c del C:\Windows\{67895~1.EXE > nul
    3⤵
    - Executes a command shell one-liner
    - System Location Discovery: System Language Discovery
    PID:2340
- 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:4372

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

{678953DF-FFFD-4ad3-A152-7973632DAA75}.exe

Path C:\Windows\{678953DF-FFFD-4ad3-A152-7973632DAA75}.exe
Size 84KB
SHA256 d8a411e05f5cd3df19391cbb87b8378be979b68d928fc063d7fb8a4f9d9146fb
MD5 266bbfa57b3a69c16371db4fcfbd6a15
SHA1 af62728ea6529a4cafa76ffa8e326002c7a044de
SHA512 eeb0ab7d24b913115b7b54dd1a43e4438810ef1bb141e71bf26b404662881684e4abef9f792d98be295776bff5cca86bc0289c9e3642c4971174459f01d044bf
SSDEEP 384:6jibD2liXsafEHsc4g6FW6e/hHjNP4/CFsrdHWMZ:6jif24cafxi6FW7/hHjNP4/wQpWMZ
TLSH
T1C2832A435F9A7CF2F7911175046A8E79A76B89D4D1AEFE9FBF80CC084462641E83A306
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

{8B5CCD27-49C7-4744-AB26-A95F09D24A05}.exe

Path C:\Windows\{8B5CCD27-49C7-4744-AB26-A95F09D24A05}.exe
Size 84KB
SHA256 adc56f17fac34d27f532298b795d7373129dac37089931e91faa29641158ec73
MD5 0705622962e468beeeb1f3b875a4262d
SHA1 2ad4c32d343a75b2b9d4cbeb33e8c5ae0f020225
SHA512 1e063bbb635164e4d43d1a4921a4a8bdbe283fd8a2b59ec7de48234ed074e5314dcbe5a9de7a9087f9be59698023f3ff950e4d8234cc1663d2f9b42719b1f48a
SSDEEP 384:6jibD2liXsafEHsc4g6FW6e/hHjNsH4/CFsrdHWMZ:6jif24cafxi6FW7/hHjNsH4/wQpWMZ
TLSH
T1B7832A435F9A7CF2F7911175047A8E79A76B89D4D1AEFE9FBF80CC084462641E83A306
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

{F5FB1D6C-C414-46f9-9307-F925ED8343CC}.exe

Path C:\Windows\{F5FB1D6C-C414-46f9-9307-F925ED8343CC}.exe
Size 84KB
SHA256 05ee02dd33961b96253b41c1f6474e5209f78df3e7edbe8b549709a5da85f90e
MD5 75e99af15363f18ff02d7ed22451e6de
SHA1 f1d1aeac0446ddcdb5b439281a00ae1704352319
SHA512 f7b1d450a6f61dde6e8791359dd433aa205b60b8db9ab724aff01f9a8f2e0e21e57af82a58c87af0f4ace3bb8e23b49a1a0ef5ce223f5e28494ff3d4b7c734f5
SSDEEP 384:6jibD2liXsafEHsc4g6FW6e/hHjN94/CFsrdHWMZ:6jif24cafxi6FW7/hHjN94/wQpWMZ
TLSH
T15C832A435F9A7CF2F7911175046A8E79A76B89D4D1AEFE9FBF80CC084462641E83A306
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