wannacry | 2040da9f26edd12522e62f2dbe7c740e0daa5d0a9a61ef4dc7b7a603de94a27c

Analysis

max time kernel
150s
max time network
151s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
29-08-2024 18:46

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General

Target

c96852bc8c3be621e1644c7816426814_JaffaCakes118.dll
Size

5.0MB
MD5

c96852bc8c3be621e1644c7816426814
SHA1

12d60cf7c584825219a3efb2db1cb851b85748ba
SHA256

2040da9f26edd12522e62f2dbe7c740e0daa5d0a9a61ef4dc7b7a603de94a27c
SHA512

2f951de91caca99f930fbaf4e25c72c439ef5c201a243425314591b533cdca5e2083556f8ecc37797c4435c70dfa7c2e3f15725df597a391a49ced9cf6cb9928
SSDEEP

49152:SnjQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAA7dhnvxJM0H9:+8qPoBhz1aRxcSUDk36SAOdhvxWa9

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3126) 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
2828	mssecsvc.exe
1140	mssecsvc.exe
2188	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 System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	mssecsvc.exe

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 1 IoCs

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

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2624 wrote to memory of 1084	2624	rundll32.exe	31
PID 2624 wrote to memory of 1084	2624	rundll32.exe	31
PID 2624 wrote to memory of 1084	2624	rundll32.exe	31
PID 2624 wrote to memory of 1084	2624	rundll32.exe	31
PID 2624 wrote to memory of 1084	2624	rundll32.exe	31
PID 2624 wrote to memory of 1084	2624	rundll32.exe	31
PID 2624 wrote to memory of 1084	2624	rundll32.exe	31
PID 1084 wrote to memory of 2828	1084	rundll32.exe	32
PID 1084 wrote to memory of 2828	1084	rundll32.exe	32
PID 1084 wrote to memory of 2828	1084	rundll32.exe	32
PID 1084 wrote to memory of 2828	1084	rundll32.exe	32

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c96852bc8c3be621e1644c7816426814_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2624
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c96852bc8c3be621e1644c7816426814_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1084
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2828
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2188

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:1140

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
a5b0927b61e603acf296f7a2c6a2f04d

SHA1
c4d016e4eb7beb7336010eb04a1b647ddd03c457

SHA256
d33ef9f7dc8397bf370053aa12fbb0999df1e59fd53de42fd0b69b5a47602f04

SHA512
34e9838c16e1c692cca30fa6390e8b63b2214ace8b1bf0a0da70332d3adaee829c3a43ff5b73257414cc9a054fe66141d6482a616271a823efe5e244a4ca6f3b

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
6e04a84c627b1bf554cf13c8c65e3757

SHA1
a04b6fb5df70779f19f98c9a2bf496d3f4a83dca

SHA256
1f00af3cb497ab7dbc7b6e6ed5e6529420d9d300788290c4cab38eeec1456851

SHA512
1b163b721638a9b8ea827054379363e8bc0c899ccc3e4281e0a8dfecd67bfe8d7ce452d7234de09c3d661f1ac649b37ee025b4833d5c23ebed5deec428d2b56b

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