wannacry | 8623833369df77caf48fea8fbb02991288ec704408a6b2ab8f080e50c073bde3

Resubmissions

04-07-2024 11:25

240704-njkn9sycpd 10

04-07-2024 10:31

240704-mkf7sswbnj 10

04-07-2024 09:44

240704-lqjpfaxarc 10

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
04-07-2024 10:31

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General

Target

8623833369df77caf48fea8fbb02991288ec704408a6b2ab8f080e50c073bde3.dll
Size

5.0MB
MD5

ee5f76b5cc4312095074df3967b13617
SHA1

254d83a07c6171e926d624080d60c0715fb19f13
SHA256

8623833369df77caf48fea8fbb02991288ec704408a6b2ab8f080e50c073bde3
SHA512

2f9e0aeb58827a6564efc495e4e195a930c75e7892761346094af58a7250789bc55e80e88be73a80f60b4a403671eadbd9e98c5c88325a73d813e6102bef5fa4
SSDEEP

49152:znAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9:TDqPoBhz1aRxcSUDk36SAEdhvxWa9

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (2683) 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
460	mssecsvc.exe
3764	mssecsvc.exe
2848	tasksche.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

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 1548 wrote to memory of 3692	1548	rundll32.exe	80
PID 1548 wrote to memory of 3692	1548	rundll32.exe	80
PID 1548 wrote to memory of 3692	1548	rundll32.exe	80
PID 3692 wrote to memory of 460	3692	rundll32.exe	81
PID 3692 wrote to memory of 460	3692	rundll32.exe	81
PID 3692 wrote to memory of 460	3692	rundll32.exe	81

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8623833369df77caf48fea8fbb02991288ec704408a6b2ab8f080e50c073bde3.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1548
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\8623833369df77caf48fea8fbb02991288ec704408a6b2ab8f080e50c073bde3.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:3692
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:460
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2848

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3764

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

C:\WINDOWS\mssecsvc.exe

Filesize
3.6MB

MD5
9890c9dbf8c659fa98130bba6c38683f

SHA1
42ae2ad8a47176f67f71f4b69552e37401a62d38

SHA256
860069ce5390b85cfff852295d2113ea0d052003f8c769c20184962aae6b37d6

SHA512
b5a196a8a9b25f57bc075ed117dbfe991f3cd7fff33f598cee5e1109caf749431221098098127fb2e0bdf8c820ccf236fe1a863c8f33c12dc7c055b33eca2d60

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
dbcd133912ef8b511909bceafe6eb16d

SHA1
cdeb4dc71a6287ad3dc42de4ecd5cd160eae3ea2

SHA256
5265873b0641f1875701a126fcf56d45d1f4a91de77ee4e1ca5507a5062c362a

SHA512
1a5d5c78de9609bf60b62ab595dc4e1cd90ad9f3582b45052c1837578d10d86ab533340a3251db143ea19a8a157329bdd622a1ac88e3416883eab3b15a05a8cf

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