wannacry | 8fb8affd012c7c103942c3c544ca7a2e31375428bb6cd17fbd49a6be08e47103

Resubmissions

28/05/2026, 12:40

260528-pwffrafy9m

28/05/2026, 12:37

260528-pttwcsfy2n10

Analysis

user interaction
yes
max time kernel
84s
max time network
86s
platform
windows10-ltsc_2021_x64
resource
win10ltsc2021-20260513-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20260513-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows
submitted
28/05/2026, 12:37

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General

Target
0ab9a60a55cb40fc338e8f4988feee2f.dll
Size 5.0MB
Sample260528-pttwcsfy2n
SHA256 8fb8affd012c7c103942c3c544ca7a2e31375428bb6cd17fbd49a6be08e47103
MD5 0ab9a60a55cb40fc338e8f4988feee2f
SHA1 40b02f6f1d79200e8c2cca3123f08994b06cc0cf
SHA512 ccf39f7923768037e823a5f3ddfc0895bb244c35a39d5199cbcd6a830e1544c56e3aa322cf7ede0fa8332ce6925a01755c9e1606dddb308c5e6f63b855e2ae11
SSDEEP 24576:RbLguriIfEcQdIvrYbcMNgef0QeQjG/D8kIqRYoAd:RnpEjbcBVQej/1I
TLSH
T11E36126634DCC071C103623098BBCB62E5BA7C292675A54FBF904F7A2E237A1E715B43
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery wannacry ransomware worm

Malware Config

Signatures

Family: Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (901) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

Executes dropped EXE 3 IoCs

pid	Process
2764	mssecsvr.exe
4988	mssecsvr.exe
2608	tasksche.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\eee.exe	tasksche.exe
File created	C:\WINDOWS\mssecsvr.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvr.exe
File created	C:\Windows\__tmp_rar_sfx_access_check_240672406	tasksche.exe

System Location Discovery: System Language Discovery 1 TTPs 4 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	mssecsvr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tasksche.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvr.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1984 wrote to memory of 3416	1984	rundll32.exe	83
PID 3416 wrote to memory of 2764	3416	rundll32.exe	84
PID 2764 wrote to memory of 2608	2764	mssecsvr.exe	87

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\0ab9a60a55cb40fc338e8f4988feee2f.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1984
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\0ab9a60a55cb40fc338e8f4988feee2f.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3416
- - C:\WINDOWS\mssecsvr.exe
    C:\WINDOWS\mssecsvr.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2764
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      Drops file in Windows directory
      System Location Discovery: System Language Discovery
      PID:2608

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:4988

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

mssecsvr.exe

Path C:\WINDOWS\mssecsvr.exe
Size 2.2MB
SHA256 81e753d746d1417b626231657927a446c1406d2fccb6c8d0280780d5e2f50bc7
MD5 008fb2d2f5c1d480ffd43ef2fa6d4f72
SHA1 af3a66bfa2cda83a0f4acefd964fa11b7ec5e2b5
SHA512 935953ec5481c19f6b2bb353c3094a76a855492060260ccbe8b6845dface74a9bac77babad91c21ef42f5e91aa6c84e18558e1ea0c35f44bc309bfd4924288ab
SSDEEP 24576:QbLguriIfEcQdIvrYbcMNgef0QeQjG/D8kIqRYoAd:QnpEjbcBVQej/1I
TLSH
T1A9B5126634DCC071C503623098BBCB62E5BA7C292675A54FBF904F7A2E237A1E715B43
MD5 SHA1 SHA512 SSDEEP TLSH

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tasksche.exe

Path C:\WINDOWS\tasksche.exe
Size 2.0MB
SHA256 d902478012c72485b63542edcfb1f6cc37b1d7f26ebf16fb2c29ed3fa50f7fc9
MD5 eb4724c29cd3801e5bd42eec4acdfbc7
SHA1 03a963f396386306988faf1fd79065356b8d951d
SHA512 180ea372a2fafbca2d55856dc57252d33a744ce274582c7f1c4aa9a27e9333c5ecc8ef895ace001f1cbc09ee03c4beef79b2537aea9b3e3f6aa0f1f722bbbad4
SSDEEP 24576:tiIfEcQdIvrYbcMNgef0QeQjG/D8kIqRYoAd:XEjbcBVQej/1I
TLSH
T14695237134E1C071D613263059AACB62A4B9793537A6794BFFD00E7E7E20BA6C706783
MD5 SHA1 SHA512 SSDEEP TLSH