wannacry | 08c5cb91cd4f866696e9631646cb4697fcc21503190f45e7ca94db797cdb3ebc

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
25-08-2024 21:03

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General

Target

c1945178e35e4bc7a1aac3a0cb7634df_JaffaCakes118.dll
Size

5.0MB
MD5

c1945178e35e4bc7a1aac3a0cb7634df
SHA1

d6fb75c003b6c2b088f33fa3a3a96f89a0ccd9ea
SHA256

08c5cb91cd4f866696e9631646cb4697fcc21503190f45e7ca94db797cdb3ebc
SHA512

9288034635cd41fda2d9a5028631932962f1853cf023286afc1a0f0ec711ece81aa9a14a49545449c6873902aedec96cb4c3fc599809b2f8b8443b5b0523169d
SSDEEP

98304:+DqPoBWxcSUDk36SAEdhvxWa9P593R8yAVp2H:+DqPFxcxk3ZAEUadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3309) 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
3296	mssecsvc.exe
3340	mssecsvc.exe
3512	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\tasksche.exe	mssecsvc.exe
File created	C:\WINDOWS\mssecsvc.exe	rundll32.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	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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\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
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3336 wrote to memory of 3088	3336	rundll32.exe	84
PID 3336 wrote to memory of 3088	3336	rundll32.exe	84
PID 3336 wrote to memory of 3088	3336	rundll32.exe	84
PID 3088 wrote to memory of 3296	3088	rundll32.exe	85
PID 3088 wrote to memory of 3296	3088	rundll32.exe	85
PID 3088 wrote to memory of 3296	3088	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c1945178e35e4bc7a1aac3a0cb7634df_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3336
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c1945178e35e4bc7a1aac3a0cb7634df_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3088
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:3296
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3512

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:3340

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
ba55c2b44605ce1d42f3ea18a257324b

SHA1
14cd995071cc16ac49ec8b622751f81b9a2e0e8b

SHA256
600b4b3f0e21e2a07b65699e5c3a4b26bd98935ade413555724b7c993b1629c1

SHA512
49ea5d61069d3a388901481482acdde9a0c70c81121a9f4546f89252d3cf688774a40cc36d5441fdfe13898429c4c75675b6cfaf7018c66b8f1b25ca2fa38ae5

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
e0b24e759e673c10ee9d3f8ebc51a8cb

SHA1
9fe8138b6969c5ef2dfc8758dfacac1c77a27ac3

SHA256
8aee00fd4123d23e502ce791506c5bb8f4ddeef21ff9d1e848127fa9ed1fd366

SHA512
d937d1fb5a6a261f3a4d550c8d29e233a8f2c092dce785011b07cf7b837ec7f7891f7e56eaf47a9c61668548ad443d7ecfba3b69a284759639296d81cc1d9710

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