wannacry | a1e5e02b53406770ca90751878df57c1a2b6cccc6c6f0ae1e3f51381477e3d49

Analysis

max time kernel
180s
max time network
181s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
28/04/2026, 01:58

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General

Target
a1e5e02b53406770ca90751878df57c1a2b6cccc6c6f0ae1e3f51381477e3d49.dll
Size 5.0MB
Sample260428-cdz18acw21
SHA256 a1e5e02b53406770ca90751878df57c1a2b6cccc6c6f0ae1e3f51381477e3d49
MD5 7f56bec275568eaad6f2606732e47a5c
SHA1 d6b4ab5278749bdbb34a684f6a3973c3a4f81f9a
SHA512 93af2c33097280b3e80a614935055f6071f0d6a63eab6d61f5410141cd47f4f470df74e1559d9388519ed5ab5be26e2c0538918bde1690d19a3e570d7ccdba6f
SSDEEP 49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAA:+DqPoBhz1aRxcSUDk36SA
TLSH
T1F536D014A2E86B64E7F35EB2217B8710077A7E458D5B925E1660A04F0C33F5CDEB2F29
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 (4211) 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
4596	mssecsvc.exe
4788	mssecsvc.exe
3772	tasksche.exe

Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe

System Location Discovery: System Language Discovery 1 TTPs 3 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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe

Modifies data under HKEY_USERS 5 IoCs

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

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 5608 wrote to memory of 4532	5608	rundll32.exe	86
PID 4532 wrote to memory of 4596	4532	rundll32.exe	87

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a1e5e02b53406770ca90751878df57c1a2b6cccc6c6f0ae1e3f51381477e3d49.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:5608
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\a1e5e02b53406770ca90751878df57c1a2b6cccc6c6f0ae1e3f51381477e3d49.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4532
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4596
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3772

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:4788

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

mssecsvc.exe

Path C:\Windows\mssecsvc.exe
Size 3.6MB
SHA256 f6ad98c315855022dfc93d32e7d6c1c54f9609c06f0916a8dec1e11c94bb0650
MD5 f2b05eeea23cb6a9752c39ce751120aa
SHA1 bd5dbdeed41a567f0bbf1853171d98ef6acf19a4
SHA512 98360382e65e488b01533c9283a18cdf6b115cde10eead5df095625611abc2a3ffc50a19f3e7c8a832e2cdf6e9715b4413b15f26b023ba591ba102c3ffa98d3b
SSDEEP 49152:2nAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAA:yDqPoBhz1aRxcSUDk36SA
TLSH
T13706D014A2E86B64E7F35EB2217B8710077A7E458D5B925E1660A04F0C33F5CDEB2F29
MD5 SHA1 SHA512 SSDEEP TLSH

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 3a460e56e5c1e639b4bbecc7c5084a6eec98b819de183cc1aa9b86664cdc5365
MD5 842efb3b9ff040be431b2bee025cd3b8
SHA1 6aca3a6701d79eb115d9c657d5b228cd2c703949
SHA512 66d3e6b4d6ce80e848368d88c97fcaf913ff1e982050e67e9ad2870543cf69379abf942c4a90b49f7dc6fecc5e6a58c3bb6f8c8221a2aa08c159c9fc1283a6f4
SSDEEP 49152:nQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAA:QqPoBhz1aRxcSUDk36SA
TLSH
T1E6F5C014A2E42B54E7F35EB2227B971007797E459C9B929E1660A04F0C33F5CDEE2F29
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/4532-4-0x0000000001490000-0x00000000015B0000-memory.dmp

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memory/4596-9-0x00000000031D0000-0x00000000031D7000-memory.dmp

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memory/4788-11-0x0000000001FA0000-0x0000000001FAA000-memory.dmp

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memory/4788-10-0x0000000001030000-0x0000000001037000-memory.dmp

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Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads