wannacry | fe1e65b62cd7d316362f47bf5edb24f97c791ebc391011e221df8b8ebef7016a

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
16/06/2024, 10:57

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General

Target
b325f5b31f894f5c5292d7dafc95e563_JaffaCakes118.dll
Size 5.0MB
Sample240616-m19jaavblp
SHA256 fe1e65b62cd7d316362f47bf5edb24f97c791ebc391011e221df8b8ebef7016a
MD5 b325f5b31f894f5c5292d7dafc95e563
SHA1 817d98c51fb829f295b5524beddef41ae7bcbcbd
SHA512 4642b86eff510a8effba55fac1b4cefbb4d03afc2334169ab2c5563ccbb44444315d2429cc33608afe7523968456447278502b42dc731dad0347c432adfeb8b9
SSDEEP 49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAAfSIfb:+DqPoBhz1aRxcSUDk36SAyB
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3323) 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
3048	mssecsvc.exe
1564	mssecsvc.exe
896	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

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
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
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3192 wrote to memory of 3024	3192	rundll32.exe	89
PID 3192 wrote to memory of 3024	3192	rundll32.exe	89
PID 3192 wrote to memory of 3024	3192	rundll32.exe	89
PID 3024 wrote to memory of 3048	3024	rundll32.exe	90
PID 3024 wrote to memory of 3048	3024	rundll32.exe	90
PID 3024 wrote to memory of 3048	3024	rundll32.exe	90

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b325f5b31f894f5c5292d7dafc95e563_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3192
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\b325f5b31f894f5c5292d7dafc95e563_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:3024
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:3048
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:896

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:1564

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=3808,i,11751898164297348119,13021661521765644467,262144 --variations-seed-version --mojo-platform-channel-handle=4180 /prefetch:8
1⤵
PID:4996

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

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Downloads

mssecsvc.exe

Path C:\Windows\mssecsvc.exe
Size 3.6MB
SHA256 b5b68c15e7a6d200bd921156aceecc1684c3fff9120a7d713b143702bba4cc8e
MD5 3f435c1a39383f0b66f2e8110f1dc3ff
SHA1 1aeb08f40456637ec3fbcd9cee4a277e863a5413
SHA512 4fbf2d6725628fb7f7e84cc7acb5d2a6310b65564e4754e3b949ceeab47eb8191b90d5cc8c1225ec024058b3d03c0dfdb0da2c043d3d99706e5af45fa2184018
SSDEEP 49152:2nAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAAfSIfb4:yDqPoBhz1aRxcSUDk36SAyBs
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 39eb70821089751e0923c8898fbaf075da44ca8a0af167ea4edc10442d3bf087
MD5 bcc815a31a7e1b4f34ec7ab230c2745d
SHA1 65d27c18a0cdd28259837c9f43ba05e36f8fece3
SHA512 d0cfa32214afce4b1c9a416f39ec426c4e62e541e27e1890adce5c99f9b8fb7d41eef363189b54f971140edf1ce4f70d60eac80f6a867c21f224ac5b65655f31
SSDEEP 49152:nQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAAfSIfbN:QqPoBhz1aRxcSUDk36SAyBp
MD5 SHA1 SHA512 SSDEEP