wannacry | e58460224496dbc08ff03c6162cf20e6e5b0b7e38acd0e6fec4003a6a090eb2e

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
15/07/2024, 00:35

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General

Target

47765f90c0fb0320afb71996d787206e_JaffaCakes118.dll
Size

5.0MB
MD5

47765f90c0fb0320afb71996d787206e
SHA1

8dbc1243d4b0c8cda1d483d7386bc30cb29e5482
SHA256

e58460224496dbc08ff03c6162cf20e6e5b0b7e38acd0e6fec4003a6a090eb2e
SHA512

87ddb73ffbf29399f5cafd1772ad84c88108bb96c736df75c2b0753d000cc0bf813267cd3b356e28dfc855c87182fbee2abc491629dda38a160e10b4f7a8191e
SSDEEP

12288:T1bLgmluCti62WfSm0iEcQhfYNvrTcbckPU82900Ve7zw+K+DH:RbLguriIfEcQdIvrYbcMNgef0Q

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (2089) 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
5004	mssecsvr.exe
3736	mssecsvr.exe
2140	tasksche.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\WINDOWS\mssecsvr.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvr.exe
File created	C:\Windows\__tmp_rar_sfx_access_check_240665453	tasksche.exe
File created	C:\Windows\eee.exe	tasksche.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	mssecsvr.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4436 wrote to memory of 1912	4436	rundll32.exe	83
PID 4436 wrote to memory of 1912	4436	rundll32.exe	83
PID 4436 wrote to memory of 1912	4436	rundll32.exe	83
PID 1912 wrote to memory of 5004	1912	rundll32.exe	85
PID 1912 wrote to memory of 5004	1912	rundll32.exe	85
PID 1912 wrote to memory of 5004	1912	rundll32.exe	85
PID 5004 wrote to memory of 2140	5004	mssecsvr.exe	92
PID 5004 wrote to memory of 2140	5004	mssecsvr.exe	92
PID 5004 wrote to memory of 2140	5004	mssecsvr.exe	92

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\47765f90c0fb0320afb71996d787206e_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4436
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\47765f90c0fb0320afb71996d787206e_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:1912
- - C:\WINDOWS\mssecsvr.exe
    C:\WINDOWS\mssecsvr.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - Suspicious use of WriteProcessMemory
    PID:5004
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      Drops file in Windows directory
      PID:2140

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3736

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

Replay Monitor

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Downloads

C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
086e1eaa4896fa6e97cc95522a841bbb

SHA1
861827995bea79099ccae3f5defb62eb8ac5e00e

SHA256
5a5b35cce64dcf8a72ba98d6c34467b0b3a1ecc7bc29163feb5740ea3f42dac1

SHA512
8cf9326b88d4d96b220a765f216928f36f5cb2cf4e34dea611c46fca97fea1082dacc4f159cb58aa36ef3819dfa52d182e73b4dca193fb8a50fa8a48dd53c52d

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C:\Windows\tasksche.exe

Filesize
2.0MB

MD5
207e037f425e0f4eb3b653361d501102

SHA1
5f4e7b0b2332ca50bbad86ce9087da925858b205

SHA256
bc1ad52ffe87ffcf4b015df7d1a3db624a19a0c7923bcdd211a9006de851b742

SHA512
0a2b4a3df913786b4628dd23973e2472fc1e144921e024be5ef2f53774b561faaeec969ea49927c93534d84440e632f53fc584548f213d535bd962fdf35639af

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