wannacry | 6e52be915d36b85beac21bbc7d03fc8aeb7e2acfc8f4877a3fa319936a2e2fb2

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
21-09-2024 13:50

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General

Target

efeea1dc1f737548620a9d942b49f56b_JaffaCakes118.dll
Size

5.0MB
MD5

efeea1dc1f737548620a9d942b49f56b
SHA1

8baf6e9a7f4413c38f8952abe2e242ee519afd16
SHA256

6e52be915d36b85beac21bbc7d03fc8aeb7e2acfc8f4877a3fa319936a2e2fb2
SHA512

341cbd9af4670c5b32fce44f2446d2fb566ad3cdb44e63559299aed726d18857ae7de11bd41fdc0ec57acd25a47fcc5ac401c0347551782b83065df8a833bf8d
SSDEEP

49152:znAQqMSPbcBVQvxJM0H9PAMEc6Eau3R8yAH1plAH:TDqPoB6xWa9P5h3R8yAVp2H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3346) 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
3540	mssecsvc.exe
3160	mssecsvc.exe
2548	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	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
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 3420 wrote to memory of 492	3420	rundll32.exe	89
PID 3420 wrote to memory of 492	3420	rundll32.exe	89
PID 3420 wrote to memory of 492	3420	rundll32.exe	89
PID 492 wrote to memory of 3540	492	rundll32.exe	90
PID 492 wrote to memory of 3540	492	rundll32.exe	90
PID 492 wrote to memory of 3540	492	rundll32.exe	90

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\efeea1dc1f737548620a9d942b49f56b_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3420
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\efeea1dc1f737548620a9d942b49f56b_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:492
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:3540
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2548

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:3160

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=3364,i,8293235976513689021,7261015831736501466,262144 --variations-seed-version --mojo-platform-channel-handle=4112 /prefetch:8
1⤵
PID:3584

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
839b0259ec2f9851354309dc7e76429e

SHA1
c4cb1ced207bd12dd1d41f2e937a3f1601217367

SHA256
bd856978c8a8aca2a5cbd853bfc730585ee6c6149f0a3150397d19f9434d36a5

SHA512
12d83318f5c67866f1f45b0a5fd0fd5e0709fdc1de24c6a1f4af200c64c8a8e1313ea41cad1f3a0865c3eed0982e29bf53a3b7c77cba9c8ee4a51ed6e31d4176

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
a566ff92ef6b70b984646bb4779b6d57

SHA1
1559bb4d66394e107a7116936c5d3187e4e64f3b

SHA256
39bf3b595cb0d3ac9b42270538430826737d29431139a1fadf9b98fea7effe3c

SHA512
6d2ab9232640ea726f352ff104e0506b9f6f8e3ef3f5bcc32b4be20528ec70b98f12a3143046163fe567fd39dfef195a2160e1b4de40ec5ab500e5651db7bd71

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