wannacry | 67fb76c4fabd6e4bc050e2fc5dd3751b5d7d8e8eb0ef739cae9524e9f404c661

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
17/05/2024, 15:02

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General

Target
501dc5ce9e1ef2b61cedefeb887e4bdf_JaffaCakes118.dll
Size 5.0MB
Sample240517-sek7fsda71
SHA256 67fb76c4fabd6e4bc050e2fc5dd3751b5d7d8e8eb0ef739cae9524e9f404c661
MD5 501dc5ce9e1ef2b61cedefeb887e4bdf
SHA1 c4b666275cca5fa6f45a72588b8858293dfc8322
SHA512 54fdfed9125c1d3ddea0c87bdad326a39f24a0aaa6e09356a17403bf99fae40f91b7c5e59820c8453d8f212d805c9f4b42f6d4c79000f24a31b18f6b83d6bdf5
SSDEEP 49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9PAMEcaEa:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P5
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3260) 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
4432	mssecsvc.exe
4836	mssecsvc.exe
3256	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

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe
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

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3496 wrote to memory of 3452	3496	rundll32.exe	83
PID 3496 wrote to memory of 3452	3496	rundll32.exe	83
PID 3496 wrote to memory of 3452	3496	rundll32.exe	83
PID 3452 wrote to memory of 4432	3452	rundll32.exe	84
PID 3452 wrote to memory of 4432	3452	rundll32.exe	84
PID 3452 wrote to memory of 4432	3452	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\501dc5ce9e1ef2b61cedefeb887e4bdf_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3496
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\501dc5ce9e1ef2b61cedefeb887e4bdf_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:3452
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:4432
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3256

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4836

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

mssecsvc.exe

Path C:\Windows\mssecsvc.exe
Size 3.6MB
SHA256 10848a23a4bb66b68e1e822ae097b20de861a21134043fdb7aa567437fbdd512
MD5 1438b1a728e349833aefc78d2cf3444b
SHA1 a4e026c165c94dee9e4f23968376c0c5e663d2ce
SHA512 67f2ade068270d523a709ad6e2a1f9e56ff2138bed1738660a143a56903f73c48e1e7268c4065c186c8343de1d649f12a4c15d56d32ed2aedf31c14dbb6f7c2a
SSDEEP 49152:2nAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9PAMEcaEa:yDqPoBhz1aRxcSUDk36SAEdhvxWa9P5
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 020184730bcb72d346a6ceedb88f13e226ea037fea9116f92ba121d1452f0d4d
MD5 23e2fc74db39af10ec21a185e98203d0
SHA1 927df4391803a683658fd6c741e2fc6159c25e1e
SHA512 45c29409448fccd138a5fb31bff1dae67b8d8f03c6d7a4e1a1598eed9cebb8f3e102a9355b59ef232485e32fda6ae4cdce6ce1fdadfe1b51756dc93b12646d0b
SSDEEP 49152:nQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9PAMEcaEaa:QqPoBhz1aRxcSUDk36SAEdhvxWa9P5x
MD5 SHA1 SHA512 SSDEEP