stormser | cff9e414a6bfd8a60a4ddbf6a1c7ee74544100ea4f2b85fd7ccc42b79fb25ca6

General

Target
2026-07-01_f2e7bdb0d30bbf3cac0621c20c3355f0_elex_wannacry.exe
Size 60KB
Sample260701-hypzmsax7w
SHA256 cff9e414a6bfd8a60a4ddbf6a1c7ee74544100ea4f2b85fd7ccc42b79fb25ca6
MD5 f2e7bdb0d30bbf3cac0621c20c3355f0
SHA1 42973ea5bdeb67410cbb1bee931e3e1f0b5d56dc
SHA512 ff807bc531122227fc37f2499b6871a8a69e1fe2d307a37e853ff61c3998d5df27869a5f49f255f5113dab30e7e4ebfc1755db572f145b5af0232df9d9e007c9
SSDEEP 192:pbOzawOs81elJHsc45CcRZOgtShcWaOT2QLrCqwEUY04/CFxyNhoy5t:pbLwOs8AHsc4sMfwhKQLrof4/CFsrd
TLSH
T1E453F8834BDE5CF2F7911271087D4AB9927B99C4950EBEDFBB90CD154037292E53A10B
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery 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
behavioral2/files/0x000e00000001c50c-3.dat	family_stormser
behavioral2/files/0x000e00000001c50d-6.dat	family_stormser
behavioral2/files/0x000e00000001c510-13.dat	family_stormser
behavioral2/files/0x000f00000001c50d-18.dat	family_stormser

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\{0BE5971B-CFAF-4c6b-AA73-3FF63F04B95C}\stubpath = "C:\\Windows\\{0BE5971B-CFAF-4c6b-AA73-3FF63F04B95C}.exe"	2026-07-01_f2e7bdb0d30bbf3cac0621c20c3355f0_elex_wannacry.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{84E3DC9F-2E96-4057-849C-AC0DEE6ECD7E}	{0BE5971B-CFAF-4c6b-AA73-3FF63F04B95C}.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{84E3DC9F-2E96-4057-849C-AC0DEE6ECD7E}\stubpath = "C:\\Windows\\{84E3DC9F-2E96-4057-849C-AC0DEE6ECD7E}.exe"	{0BE5971B-CFAF-4c6b-AA73-3FF63F04B95C}.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{54E079C5-CAA3-49e5-AB32-2AD44295AEA8}	{84E3DC9F-2E96-4057-849C-AC0DEE6ECD7E}.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{54E079C5-CAA3-49e5-AB32-2AD44295AEA8}\stubpath = "C:\\Windows\\{54E079C5-CAA3-49e5-AB32-2AD44295AEA8}.exe"	{84E3DC9F-2E96-4057-849C-AC0DEE6ECD7E}.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{A6B20DA7-4EFF-4757-A2DA-ECE804D88210}	{54E079C5-CAA3-49e5-AB32-2AD44295AEA8}.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{A6B20DA7-4EFF-4757-A2DA-ECE804D88210}\stubpath = "C:\\Windows\\{A6B20DA7-4EFF-4757-A2DA-ECE804D88210}.exe"	{54E079C5-CAA3-49e5-AB32-2AD44295AEA8}.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{0BE5971B-CFAF-4c6b-AA73-3FF63F04B95C}	2026-07-01_f2e7bdb0d30bbf3cac0621c20c3355f0_elex_wannacry.exe

Executes dropped EXE 5 IoCs

pid	Process
5224	{0BE5971B-CFAF-4c6b-AA73-3FF63F04B95C}.exe
1680	{84E3DC9F-2E96-4057-849C-AC0DEE6ECD7E}.exe
4528	{54E079C5-CAA3-49e5-AB32-2AD44295AEA8}.exe
5712	{A6B20DA7-4EFF-4757-A2DA-ECE804D88210}.exe
4656	{A6B20DA7-4EFF-4757-A2DA-ECE804D88210}.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\{54E079C5-CAA3-49e5-AB32-2AD44295AEA8}.exe	{84E3DC9F-2E96-4057-849C-AC0DEE6ECD7E}.exe
File created	C:\Windows\{A6B20DA7-4EFF-4757-A2DA-ECE804D88210}.exe	{54E079C5-CAA3-49e5-AB32-2AD44295AEA8}.exe
File created	C:\Windows\{0BE5971B-CFAF-4c6b-AA73-3FF63F04B95C}.exe	2026-07-01_f2e7bdb0d30bbf3cac0621c20c3355f0_elex_wannacry.exe
File created	C:\Windows\{84E3DC9F-2E96-4057-849C-AC0DEE6ECD7E}.exe	{0BE5971B-CFAF-4c6b-AA73-3FF63F04B95C}.exe

System Location Discovery: System Language Discovery 1 TTPs 10 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	{54E079C5-CAA3-49e5-AB32-2AD44295AEA8}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{A6B20DA7-4EFF-4757-A2DA-ECE804D88210}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{84E3DC9F-2E96-4057-849C-AC0DEE6ECD7E}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{A6B20DA7-4EFF-4757-A2DA-ECE804D88210}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-07-01_f2e7bdb0d30bbf3cac0621c20c3355f0_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{0BE5971B-CFAF-4c6b-AA73-3FF63F04B95C}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies registry class 3 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\Deployment\Package\*\S-1-5-21-2639994890-966400312-4246138405-1000\{9FB359E6-9EDF-4592-BB2D-A1832A4BA2C8}	explorer.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{A8CDFF1C-4878-43be-B5FD-F8091C1C60D0}\Instance\	explorer.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{B4BFCC3A-DB2C-424C-B029-7FE99A87C641}\Instance\	explorer.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	1732	2026-07-01_f2e7bdb0d30bbf3cac0621c20c3355f0_elex_wannacry.exe
Token: SeIncBasePriorityPrivilege	5224	{0BE5971B-CFAF-4c6b-AA73-3FF63F04B95C}.exe
Token: SeIncBasePriorityPrivilege	1680	{84E3DC9F-2E96-4057-849C-AC0DEE6ECD7E}.exe
Token: SeIncBasePriorityPrivilege	4528	{54E079C5-CAA3-49e5-AB32-2AD44295AEA8}.exe
Token: SeShutdownPrivilege	2340	explorer.exe
Token: SeCreatePagefilePrivilege	2340	explorer.exe
Token: SeShutdownPrivilege	2340	explorer.exe
Token: SeCreatePagefilePrivilege	2340	explorer.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1908	sihost.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1732 wrote to memory of 5224	1732	2026-07-01_f2e7bdb0d30bbf3cac0621c20c3355f0_elex_wannacry.exe	88
PID 1732 wrote to memory of 1140	1732	2026-07-01_f2e7bdb0d30bbf3cac0621c20c3355f0_elex_wannacry.exe	89
PID 5224 wrote to memory of 1680	5224	{0BE5971B-CFAF-4c6b-AA73-3FF63F04B95C}.exe	90
PID 5224 wrote to memory of 3132	5224	{0BE5971B-CFAF-4c6b-AA73-3FF63F04B95C}.exe	91
PID 1680 wrote to memory of 4528	1680	{84E3DC9F-2E96-4057-849C-AC0DEE6ECD7E}.exe	93
PID 1680 wrote to memory of 4832	1680	{84E3DC9F-2E96-4057-849C-AC0DEE6ECD7E}.exe	94
PID 4528 wrote to memory of 5712	4528	{54E079C5-CAA3-49e5-AB32-2AD44295AEA8}.exe	95
PID 4528 wrote to memory of 5748	4528	{54E079C5-CAA3-49e5-AB32-2AD44295AEA8}.exe	96
PID 1908 wrote to memory of 2340	1908	sihost.exe	101
PID 2340 wrote to memory of 4656	2340	explorer.exe	102

C:\Users\Admin\AppData\Local\Temp\2026-07-01_f2e7bdb0d30bbf3cac0621c20c3355f0_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-01_f2e7bdb0d30bbf3cac0621c20c3355f0_elex_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:1732
- C:\Windows\{0BE5971B-CFAF-4c6b-AA73-3FF63F04B95C}.exe
  C:\Windows\{0BE5971B-CFAF-4c6b-AA73-3FF63F04B95C}.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:5224
- - C:\Windows\{84E3DC9F-2E96-4057-849C-AC0DEE6ECD7E}.exe
    C:\Windows\{84E3DC9F-2E96-4057-849C-AC0DEE6ECD7E}.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:1680
  - - C:\Windows\{54E079C5-CAA3-49e5-AB32-2AD44295AEA8}.exe
      C:\Windows\{54E079C5-CAA3-49e5-AB32-2AD44295AEA8}.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:4528
    - - C:\Windows\{A6B20DA7-4EFF-4757-A2DA-ECE804D88210}.exe
        
        C:\Windows\{A6B20DA7-4EFF-4757-A2DA-ECE804D88210}.exe
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        
        PID:5712
    - - C:\Windows\SysWOW64\cmd.exe
        
        C:\Windows\system32\cmd.exe /c del C:\Windows\{54E07~1.EXE > nul
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:5748
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c del C:\Windows\{84E3D~1.EXE > nul
      4⤵
      System Location Discovery: System Language Discovery
      PID:4832
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c del C:\Windows\{0BE59~1.EXE > nul
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3132
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del C:\Users\Admin\AppData\Local\Temp\2026-0~1.EXE > nul
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1140

C:\Windows\system32\sihost.exe
sihost.exe
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:1908
- C:\Windows\explorer.exe
  explorer.exe /LOADSAVEDWINDOWS
  2⤵
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2340
- - C:\Windows\{A6B20DA7-4EFF-4757-A2DA-ECE804D88210}.exe
    "C:\Windows\{A6B20DA7-4EFF-4757-A2DA-ECE804D88210}.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4656

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

Replay Monitor

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Downloads

{0BE5971B-CFAF-4c6b-AA73-3FF63F04B95C}.exe

Path C:\Windows\{0BE5971B-CFAF-4c6b-AA73-3FF63F04B95C}.exe
Size 60KB
SHA256 ed90bb6260a88a7caf7a74333232f9bcf1e8725a706dbe0636a4cc008b0d822f
MD5 537479f960cf7cb7c00a868e3b485e82
SHA1 42f85f8f19ff3c8a22176d78876d21c2efadaccc
SHA512 4cff0523d5a6b62c793097699ca2b6e3f99e27164d9b4f7d2474a86711acc7ae0bfdd32508e6705c3bc7ef94d1dee03153fd59a67e32c034b43925ed1ec9eba1
SSDEEP 192:pbOzawOs81elJHsc45CcRZOgtShcWaOT2QLrCqwfY04/CFxyNhoy5t:pbLwOs8AHsc4sMfwhKQLroR4/CFsrd
TLSH
T19F53F8834BDE5CF2F791113108798AB9927B99D4950EBEDFBF90CD150037292E53A10B
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

{54E079C5-CAA3-49e5-AB32-2AD44295AEA8}.exe

Path C:\Windows\{54E079C5-CAA3-49e5-AB32-2AD44295AEA8}.exe
Size 60KB
SHA256 2d022e081f915ab96ba8619c532297af8d2f5420e3a9589e369106062b4b3132
MD5 47499cf9891ac3afd1ce4d764341177f
SHA1 93b7642c74751a51a2154fc10a8d9f005af12fb9
SHA512 fefd8790deb5403d63aed91729761c2183750a2a9bb583e6199a521d8a6bb3e9a1f2f5808092c5cd7979dbf2857de3341f0f06f8a79da085d3aeac6bd2a8bb7e
SSDEEP 192:pbOzawOs81elJHsc45CcRZOgtShcWaOT2QLrCqwHY04/CFxyNhoy5t:pbLwOs8AHsc4sMfwhKQLro54/CFsrd
TLSH
T12353F8835BEE5CF2F791117108794AB9927B99C4950EBEDFBB90CD150037292E53A10B
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

{84E3DC9F-2E96-4057-849C-AC0DEE6ECD7E}.exe

Path C:\Windows\{84E3DC9F-2E96-4057-849C-AC0DEE6ECD7E}.exe
Size 60KB
SHA256 a9c2a141258358f6f511c55f60ad6963f8675cfc7ea2509828e02153ddfda626
MD5 3827a673bf0908245445d444c2f497b7
SHA1 e975bee776fa37382073004d510d5bcc4c248cd1
SHA512 bd08bd5043d3e3e73834357cf48c54fbb4f205a0d34d49239d0f37b2c7636f5b6092ebf8db64c2fcd20fb122d30b49f801229d42aea04af6be397354e1d93563
SSDEEP 192:pbOzawOs81elJHsc45CcRZOgtShcWaOT2QLrCqwkY04/CFxyNhoy5t:pbLwOs8AHsc4sMfwhKQLroS4/CFsrd
TLSH
T18553F8834BDE9CF2F691123108798AB9927B99C4950EBEDFBB90CD154037292E53A10B
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

{A6B20DA7-4EFF-4757-A2DA-ECE804D88210}.exe

Path C:\Windows\{A6B20DA7-4EFF-4757-A2DA-ECE804D88210}.exe
Size 60KB
SHA256 0a532775f5563f8094a33330dc1457751567c4d35a9442254fc6a2546a4727a2
MD5 8ec1b893dd7e5f0e727b483baae7d9ad
SHA1 f5d6b7b9a7ab3d6902798a6deb2f6372206af5f0
SHA512 209aa589b400d46022f85dc9061e67dfb433b41b9587c000f95400c9f245a2f9b77e4e50fa549cdbfc2713881eadb646f593d0d78791b8637d5acf162b5a4da1
SSDEEP 192:pbOzawOs81elJHsc45CcRZOgtShcWaOT2QLrCqwXY04/CFxyNhoy5t:pbLwOs8AHsc4sMfwhKQLrop4/CFsrd
TLSH
T12C53F8834BDE5CF2F691113108798BB9927B99D4950EBEDFBF90CD154037292E53A10B
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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