wannacry | d1195652fd33c83b3823e14f37c54bebc3a7724ca04f39520ca3dc39a0080f5c

Analysis

max time kernel
150s
max time network
155s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
07-05-2024 16:39

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General

Target

2113c535e046ed03f5c5239b2e3212dd_JaffaCakes118.dll
Size

5.0MB
MD5

2113c535e046ed03f5c5239b2e3212dd
SHA1

8e01eb6d2de7a37b5c35e4f2d5d31e989ac73176
SHA256

d1195652fd33c83b3823e14f37c54bebc3a7724ca04f39520ca3dc39a0080f5c
SHA512

fc4f4338a3edaa2ed308735b15d131aec149b0586d9c0fe48d988f34ba2f7fac21c9df5c50a138dbdebc8ff797b24d4ce529beb9b7595dc4b77c312d66d09caf
SSDEEP

98304:T8qPoBhz1aRxcSUDk36SAEdhvxWa9P593R8yAVp2s:T8qPe1Cxcxk3ZAEUadzR8yc4s

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3198) 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

1892 mssecsvc.exe
2252 mssecsvc.exe
2464 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
1892	mssecsvc.exe
2252	mssecsvc.exe
2464	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 2696 wrote to memory of 1312	2696	rundll32.exe	rundll32.exe
PID 2696 wrote to memory of 1312	2696	rundll32.exe	rundll32.exe
PID 2696 wrote to memory of 1312	2696	rundll32.exe	rundll32.exe
PID 2696 wrote to memory of 1312	2696	rundll32.exe	rundll32.exe
PID 2696 wrote to memory of 1312	2696	rundll32.exe	rundll32.exe
PID 2696 wrote to memory of 1312	2696	rundll32.exe	rundll32.exe
PID 2696 wrote to memory of 1312	2696	rundll32.exe	rundll32.exe
PID 1312 wrote to memory of 1892	1312	rundll32.exe	mssecsvc.exe
PID 1312 wrote to memory of 1892	1312	rundll32.exe	mssecsvc.exe
PID 1312 wrote to memory of 1892	1312	rundll32.exe	mssecsvc.exe
PID 1312 wrote to memory of 1892	1312	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2113c535e046ed03f5c5239b2e3212dd_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2696

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2113c535e046ed03f5c5239b2e3212dd_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1312

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1892

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2464

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:2252

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
fa43565cb2d9f067d82f38e4e0f3b261

SHA1
6b6353a45a88725f61ad679b8530eb93177ff7b9

SHA256
79bb6ae9f7c2f733d475970a12fb268a75a1b700ceb0c791f831732b72a83b88

SHA512
32696cc93af620753eaed0c082fb5fa09fb641d34715b01b6ec2e1ef9576941e14be7886fc2f095075ca233b58f8777c68b9d045bbab5cf85c7b2fe72abe1233

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
b28af569881d85a183a91438bc35abb1

SHA1
857e19e8f2f9dd6c3a43f2defcf214fe116affca

SHA256
837aa77b122962862d55e37c10f1544db08aaaf095d877e6265d7025334343b5

SHA512
59614eba8868c06c159537bf594af154b56bb0f2f0c4ec09a104b5073526507e58836f3f16b454fa95327983359baf7e2f02ede4c597ab412be18dc574d26ec5

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