wannacry | b88437666813ef3309aa1e80af63a4107b0ffcf828d3f3a6248d137d374e9487

Resubmissions

14-06-2024 08:42

240614-kmafxswgpk 10

12-06-2024 22:05

240612-1zpz5swcqm 10

12-06-2024 21:15

240612-z382ravajl 10

Analysis

max time kernel
150s
max time network
154s
platform
windows7_x64
resource
win7-20240611-en
resource tags

arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
submitted
12-06-2024 21:15

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General

Target

a267d7958b57ee1b1cb84b907997c172_JaffaCakes118.dll
Size

5.0MB
MD5

a267d7958b57ee1b1cb84b907997c172
SHA1

7ccba7e4234c39b21751e773f2492dc325048ad9
SHA256

b88437666813ef3309aa1e80af63a4107b0ffcf828d3f3a6248d137d374e9487
SHA512

27f386ecb3b097b7bacbc2472fdc518b6cfd52d03c58fea81051711ade587f4288d0ae684065f7fa6e09c737ee34f9615432531e4c18dd75afdd3c861d6a9a6d
SSDEEP

49152:JnjQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0HY:d8qPoBhz1aRxcSUDk36SAEdhvxWa

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3155) 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

Processes:

mssecsvc.exemssecsvc.exetasksche.exe

pid process

2144 mssecsvc.exe
2996 mssecsvc.exe
2712 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

pid	process
2144	mssecsvc.exe
2996	mssecsvc.exe
2712	tasksche.exe

Drops file in System32 directory 1 IoCs

Processes:

mssecsvc.exe

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

Processes:

rundll32.exemssecsvc.exe

description ioc process

File created C:\WINDOWS\mssecsvc.exe rundll32.exe
File created C:\WINDOWS\tasksche.exe mssecsvc.exe
Modifies data under HKEY_USERS 1 IoCs

Processes:

mssecsvc.exe

description ioc process

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

description	ioc	process
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe

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

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 3008 wrote to memory of 3040	3008	rundll32.exe	rundll32.exe
PID 3008 wrote to memory of 3040	3008	rundll32.exe	rundll32.exe
PID 3008 wrote to memory of 3040	3008	rundll32.exe	rundll32.exe
PID 3008 wrote to memory of 3040	3008	rundll32.exe	rundll32.exe
PID 3008 wrote to memory of 3040	3008	rundll32.exe	rundll32.exe
PID 3008 wrote to memory of 3040	3008	rundll32.exe	rundll32.exe
PID 3008 wrote to memory of 3040	3008	rundll32.exe	rundll32.exe
PID 3040 wrote to memory of 2144	3040	rundll32.exe	mssecsvc.exe
PID 3040 wrote to memory of 2144	3040	rundll32.exe	mssecsvc.exe
PID 3040 wrote to memory of 2144	3040	rundll32.exe	mssecsvc.exe
PID 3040 wrote to memory of 2144	3040	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a267d7958b57ee1b1cb84b907997c172_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3008

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a267d7958b57ee1b1cb84b907997c172_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:3040

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2144

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2712

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:2996

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\mssecsvc.exe

Filesize
3.6MB

MD5
a92d2bd3ef824f719a1d7888613f8d99

SHA1
0207602cc17e660aa396ace208b4f5a1cfcf4ac1

SHA256
28eee3558a332fcda557b279f49fa7d8691cd3db728fbb925b2c845b4711db1f

SHA512
edf6a2099eb518ffdcdaf06e7c76e71b78faeb2feb3fe99c687ba723f1c3a51ea9377b2430dd89f210f18f3a605a3ca75773012f7e3341326d8dc7f181d7c99a

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
924f4b9cd7172359495f38f678f4a2a9

SHA1
d1c18d2c67c08c2ace72d62454b1df97e064d813

SHA256
e99bc8bf46e522afff858ec0ade4310b14bf8874a984953510e1455976ec0d3a

SHA512
dfcf914772645210e03347f3b04aaffc09c9af345420e6d1038572b4ee062c17a8b054daaf416e2b92dfa5c0b9a599ced967d291a2a8b243cdd13c2e7b2dc681

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