wannacry | aac0eec1ac9e7d36336cae82fb402f8ef9b0d557699db1ed118512222ba56d79

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
20-09-2024 16:35

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General

Target

edff1a8b473cdc513a9fb76d75e9bc8e_JaffaCakes118.dll
Size

5.0MB
MD5

edff1a8b473cdc513a9fb76d75e9bc8e
SHA1

07e62469ba40b315a2476ba17bfe8e14ee08bcc6
SHA256

aac0eec1ac9e7d36336cae82fb402f8ef9b0d557699db1ed118512222ba56d79
SHA512

7cf14beb23f64ce21d399d64d6c39263903719a3afe9b6096b1aab2b087317fdac7923f155ca78295457d7a3387809191e8e6a041b78fd3519ad02e1eb86c889
SSDEEP

49152:znAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9PAMEcaEa:TDqPoBhz1aRxcSUDk36SAEdhvxWa9P5

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3192) 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
212	mssecsvc.exe
3560	mssecsvc.exe
4608	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\AutoDetect = "0"	mssecsvc.exe
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

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3672 wrote to memory of 208	3672	rundll32.exe	82
PID 3672 wrote to memory of 208	3672	rundll32.exe	82
PID 3672 wrote to memory of 208	3672	rundll32.exe	82
PID 208 wrote to memory of 212	208	rundll32.exe	83
PID 208 wrote to memory of 212	208	rundll32.exe	83
PID 208 wrote to memory of 212	208	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\edff1a8b473cdc513a9fb76d75e9bc8e_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3672
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\edff1a8b473cdc513a9fb76d75e9bc8e_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:208
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:212
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4608

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:3560

Network

MITRE ATT&CK Enterprise v15

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

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
a192af4c3f2b4231a03667e2cc26a7f1

SHA1
899e0d867a41d60fa34d942cab7944833ae0ecf9

SHA256
dbb6f840ae1e45e1169cbf21e26a113346b1e8a3bfe3eda4bdd0c5756eeeebad

SHA512
00c8460e302290ef56d2759361d86ad8e9bf96cf2a84f4e2c294eaeb1934842fb00d8638afe74c1bf247bfc19fba0ca0cbf6f9739af64a00026cd1e1917c5799

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
ef52a9cc81aaa4fac5da701dcfbc57e3

SHA1
fc192c3b5fdc310c35e123870ba6a75bf5173129

SHA256
d75e0e4bc36837db0f901367e4a18ff2f55756454b1120e65144a5a0d3901030

SHA512
fa16c9f3edefd743323bfe4bbf4561e581a3650b766c7c27130bb8b8f08498f6bede665f92454db6d1598722bd74cb8025852f0a2a72996416c50f139b2d287c

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