wannacry | a51b3eec32ccb2ad6fc42504f80e171989007dee46345cc55357f94b08a53de4

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
28-09-2024 20:42

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General

Target

fd1b4bdeca9ebf5c3bc716fa290f43e6_JaffaCakes118.dll
Size

5.0MB
MD5

fd1b4bdeca9ebf5c3bc716fa290f43e6
SHA1

28936eaa6241dad63399d7762c86a93078577f93
SHA256

a51b3eec32ccb2ad6fc42504f80e171989007dee46345cc55357f94b08a53de4
SHA512

4ad3296b9f1bc15df4df0c03b88362ba54d279b7329cb84c088549ee02ae76f6856c162361920ac0017e17ccfc6b10015bf2aa6d8ee781a90c069543c10ba16a
SSDEEP

49152:znAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAAOH:TDqPoBhz1aRxcSUDk36SAl

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3127) 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
5116	mssecsvc.exe
4396	mssecsvc.exe
2476	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 528 wrote to memory of 4868	528	rundll32.exe	82
PID 528 wrote to memory of 4868	528	rundll32.exe	82
PID 528 wrote to memory of 4868	528	rundll32.exe	82
PID 4868 wrote to memory of 5116	4868	rundll32.exe	83
PID 4868 wrote to memory of 5116	4868	rundll32.exe	83
PID 4868 wrote to memory of 5116	4868	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\fd1b4bdeca9ebf5c3bc716fa290f43e6_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:528
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\fd1b4bdeca9ebf5c3bc716fa290f43e6_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4868
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:5116
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2476

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:4396

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
c3556a14dc544ed95f81d7e627122ffe

SHA1
d59181b3521fc70e8ca6d757030e227fe8cf21ed

SHA256
827815261c90b5ba670a6df8218d5df75e05708570f548eac9f001161ae43e4e

SHA512
4c267ee528b453daafbd4865567dc90f667618e4f65ca0fdda8ad7f7aa31fb3d878c54d6ec2f7f8c9ae054920e2cc22ad675fa013c31e0896db8ba00dc27c52e

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
0f658698550088cc5b669ffb867e3b2c

SHA1
a7ae033c6a6e5e45a1596c7c4f86676644e75efb

SHA256
a91570cafc15a96bded0d6e97d27d745b05c6dba6d1f3517aec24a9b3f756674

SHA512
8c609ac8de3d9eb468703e6e8c4ea7f60e23a73fceca64d46a2112adff2dbabcb0cc13f4d5239fadf920b11792cbd8a6684ad8b8b7d8feb195f156a708c4b35a

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