stormser | c9e2748f064855166f82d1c1f4d8faf7f58a676456e739c89ed9d5e28549b84b

General

Target
2026-07-01_bf5cf79bb1fbf41f393a3584aeac6db9_elex_wannacry.exe
Size 90KB
Sample260701-t6kwfaav2k
SHA256 c9e2748f064855166f82d1c1f4d8faf7f58a676456e739c89ed9d5e28549b84b
MD5 bf5cf79bb1fbf41f393a3584aeac6db9
SHA1 0a7ffc8586373af19a1f90ad101a624dab8ec201
SHA512 be864a7fa1181d789757aa044db0ea90bc3d8fe9d83a0396fdcb1636be3f6d18d8e134101c3d8409ba4dc554520d841ef4daf7db251195957fede283c82d7ed9
SSDEEP 768:Qvw9816vhKQLro94/wQRNrfrunMxVFA3b7glw6:YEGh0o9l2unMxVS3Hgl
TLSH
T1A093C53D5EDA103BE2B7D6B585F125E3FE66B98336095D0E05D243428C23B53AD8AC1D
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 3 IoCs

resource	yara_rule
behavioral2/files/0x000e00000001c506-3.dat	family_stormser
behavioral2/files/0x000e00000001c507-6.dat	family_stormser
behavioral2/files/0x000e00000001c509-13.dat	family_stormser

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\{E96F8FF8-DA0F-46c4-AA90-2856CE7044EB}	{A9ADF988-376C-4748-86E1-61C357535D06}.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{E96F8FF8-DA0F-46c4-AA90-2856CE7044EB}\stubpath = "C:\\Windows\\{E96F8FF8-DA0F-46c4-AA90-2856CE7044EB}.exe"	{A9ADF988-376C-4748-86E1-61C357535D06}.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{40C96BC3-E716-4df8-B8A8-FD81CDB5D1A9}	2026-07-01_bf5cf79bb1fbf41f393a3584aeac6db9_elex_wannacry.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{40C96BC3-E716-4df8-B8A8-FD81CDB5D1A9}\stubpath = "C:\\Windows\\{40C96BC3-E716-4df8-B8A8-FD81CDB5D1A9}.exe"	2026-07-01_bf5cf79bb1fbf41f393a3584aeac6db9_elex_wannacry.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{A9ADF988-376C-4748-86E1-61C357535D06}	{40C96BC3-E716-4df8-B8A8-FD81CDB5D1A9}.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{A9ADF988-376C-4748-86E1-61C357535D06}\stubpath = "C:\\Windows\\{A9ADF988-376C-4748-86E1-61C357535D06}.exe"	{40C96BC3-E716-4df8-B8A8-FD81CDB5D1A9}.exe

Executes dropped EXE 4 IoCs

pid	Process
4900	{40C96BC3-E716-4df8-B8A8-FD81CDB5D1A9}.exe
2980	{A9ADF988-376C-4748-86E1-61C357535D06}.exe
2692	{E96F8FF8-DA0F-46c4-AA90-2856CE7044EB}.exe
2540	{E96F8FF8-DA0F-46c4-AA90-2856CE7044EB}.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\{A9ADF988-376C-4748-86E1-61C357535D06}.exe	{40C96BC3-E716-4df8-B8A8-FD81CDB5D1A9}.exe
File created	C:\Windows\{E96F8FF8-DA0F-46c4-AA90-2856CE7044EB}.exe	{A9ADF988-376C-4748-86E1-61C357535D06}.exe
File created	C:\Windows\{40C96BC3-E716-4df8-B8A8-FD81CDB5D1A9}.exe	2026-07-01_bf5cf79bb1fbf41f393a3584aeac6db9_elex_wannacry.exe

System Location Discovery: System Language Discovery 1 TTPs 8 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	2026-07-01_bf5cf79bb1fbf41f393a3584aeac6db9_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{A9ADF988-376C-4748-86E1-61C357535D06}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{E96F8FF8-DA0F-46c4-AA90-2856CE7044EB}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{E96F8FF8-DA0F-46c4-AA90-2856CE7044EB}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{40C96BC3-E716-4df8-B8A8-FD81CDB5D1A9}.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-1-5-21-1797646245-3139070211-3019596475-1000\{EBB95E8A-2964-4178-9F23-B2300B68602D}	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 7 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	3632	2026-07-01_bf5cf79bb1fbf41f393a3584aeac6db9_elex_wannacry.exe
Token: SeIncBasePriorityPrivilege	4900	{40C96BC3-E716-4df8-B8A8-FD81CDB5D1A9}.exe
Token: SeIncBasePriorityPrivilege	2980	{A9ADF988-376C-4748-86E1-61C357535D06}.exe
Token: SeShutdownPrivilege	3068	explorer.exe
Token: SeCreatePagefilePrivilege	3068	explorer.exe
Token: SeShutdownPrivilege	3068	explorer.exe
Token: SeCreatePagefilePrivilege	3068	explorer.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
764	sihost.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3632 wrote to memory of 4900	3632	2026-07-01_bf5cf79bb1fbf41f393a3584aeac6db9_elex_wannacry.exe	88
PID 3632 wrote to memory of 3440	3632	2026-07-01_bf5cf79bb1fbf41f393a3584aeac6db9_elex_wannacry.exe	89
PID 4900 wrote to memory of 2980	4900	{40C96BC3-E716-4df8-B8A8-FD81CDB5D1A9}.exe	90
PID 4900 wrote to memory of 3456	4900	{40C96BC3-E716-4df8-B8A8-FD81CDB5D1A9}.exe	91
PID 2980 wrote to memory of 2692	2980	{A9ADF988-376C-4748-86E1-61C357535D06}.exe	93
PID 2980 wrote to memory of 3716	2980	{A9ADF988-376C-4748-86E1-61C357535D06}.exe	94
PID 764 wrote to memory of 3068	764	sihost.exe	99
PID 3068 wrote to memory of 2540	3068	explorer.exe	100

C:\Users\Admin\AppData\Local\Temp\2026-07-01_bf5cf79bb1fbf41f393a3584aeac6db9_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-01_bf5cf79bb1fbf41f393a3584aeac6db9_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:3632
- C:\Windows\{40C96BC3-E716-4df8-B8A8-FD81CDB5D1A9}.exe
  C:\Windows\{40C96BC3-E716-4df8-B8A8-FD81CDB5D1A9}.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:4900
- - C:\Windows\{A9ADF988-376C-4748-86E1-61C357535D06}.exe
    C:\Windows\{A9ADF988-376C-4748-86E1-61C357535D06}.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:2980
  - - C:\Windows\{E96F8FF8-DA0F-46c4-AA90-2856CE7044EB}.exe
      C:\Windows\{E96F8FF8-DA0F-46c4-AA90-2856CE7044EB}.exe
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:2692
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c del C:\Windows\{A9ADF~1.EXE > nul
      4⤵
      System Location Discovery: System Language Discovery
      PID:3716
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c del C:\Windows\{40C96~1.EXE > nul
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3456
- 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:3440

C:\Windows\system32\sihost.exe
sihost.exe
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:764
- C:\Windows\explorer.exe
  explorer.exe /LOADSAVEDWINDOWS
  2⤵
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3068
- - C:\Windows\{E96F8FF8-DA0F-46c4-AA90-2856CE7044EB}.exe
    "C:\Windows\{E96F8FF8-DA0F-46c4-AA90-2856CE7044EB}.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2540

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

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Downloads

{40C96BC3-E716-4df8-B8A8-FD81CDB5D1A9}.exe

Path C:\Windows\{40C96BC3-E716-4df8-B8A8-FD81CDB5D1A9}.exe
Size 90KB
SHA256 7930e7b464e9057fbbd8540b77ed6664709940176a142c3b2cd08711982bf24e
MD5 0f88df8594b76eb58bc13d2fa241a730
SHA1 9a1bfd88b6706f5d9d54b0e7fda10ad1fbb994e7
SHA512 3ca217ab1d1bc5a324761d1cf419e7c8d11e55c80b215a4b5c4a9c62aa2399e570c836e6c5a8e88ece0da4fce0aa90df0a4011dd3164989370089f16ccdb7119
SSDEEP 768:Qvw9816vhKQLrooL4/wQRNrfrunMxVFA3b7glw6:YEGh0ooLl2unMxVS3Hgl
TLSH
T17793C53D5DDA103BE2B7D6B585F125E3FE66B9833A0A5D0E05D243428C23B53AD8AC1D
MD5 SHA1 SHA512 SSDEEP TLSH

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{A9ADF988-376C-4748-86E1-61C357535D06}.exe

Path C:\Windows\{A9ADF988-376C-4748-86E1-61C357535D06}.exe
Size 90KB
SHA256 cc86b00554b9a443e1b2fe3cb52ab947c5a63e8a18a04d0b0d9b6bebac2714b8
MD5 e71b84175a7cce9a5f5c4854e6abe156
SHA1 b7add65a3085285c716a8ae97460ab200e133100
SHA512 60a39a8a9d6ff1f19ad4b19247f8402c18c18500cdb2b04e2b5a2e10305672ae4bb9fe9821311e39e1aee6c075ae646c3b64fd1013bcb9599ccc2b712760f0a5
SSDEEP 768:Qvw9816vhKQLroC4/wQRNrfrunMxVFA3b7glw6:YEGh0oCl2unMxVS3Hgl
TLSH
T1D593C53D5EDA103BE2B7D6B585F126E3FE66B98336095D0E05D243428C23B53AD8AC1D
MD5 SHA1 SHA512 SSDEEP TLSH

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{E96F8FF8-DA0F-46c4-AA90-2856CE7044EB}.exe

Path C:\Windows\{E96F8FF8-DA0F-46c4-AA90-2856CE7044EB}.exe
Size 90KB
SHA256 6a91ae818280d7114e62ae4a0cd3f01d6c0e59068cef6f1385bac6cb077dce53
MD5 375ac4b2f5b8fb6a6d9d1736bc337d26
SHA1 1ca7591be6d324d4525f571aa667da818e2cd058
SHA512 b36508e65b560c1444eaf7403f4284407b570bae64d04e5607173c7acb9c2f9ffb2cffa2f5ce97a78a5159cb5d057cfd67ad3e9fd247303afc96646c343368bd
SSDEEP 768:Qvw9816vhKQLro+4/wQRNrfrunMxVFA3b7glw6:YEGh0o+l2unMxVS3Hgl
TLSH
T1B493C53D5EDA103BE2B7D6B585F125E3FE66B983360A5D0E05D243428C23B53AD8AC1D
MD5 SHA1 SHA512 SSDEEP TLSH

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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