wannacry | 847521d5b3faff34a8f6313506d6f232c9fd99c65bea3f3305d994679ead6216

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
26-05-2024 20:40

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General

Target

76c2f0bc0c37fe765f7c147cb72edb62_JaffaCakes118.dll
Size

5.0MB
MD5

76c2f0bc0c37fe765f7c147cb72edb62
SHA1

68d778d4da69cd5722cc537a965668dfdce2bd4f
SHA256

847521d5b3faff34a8f6313506d6f232c9fd99c65bea3f3305d994679ead6216
SHA512

c0ff78e4e838fa3e6694f5df06d47d38ac03343e79564f7966cfdddefc964139b4a470f7fbf18ff294983699feadeff576355b2746afb76048aa5172a9bc76d7
SSDEEP

24576:SbLgddQhfdmMSirYbcMNgef0QeQjG/D8kIOASk+RdhAdmv1LJMfcH9PO6L:SnAQqMSPbcBVQej/ZAARdhnvxJM0H9

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3148) 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

1368 mssecsvc.exe
3616 mssecsvc.exe
1400 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

Processes:

rundll32.exemssecsvc.exe

description ioc process

File created C:\WINDOWS\mssecsvc.exe rundll32.exe
File created C:\WINDOWS\tasksche.exe mssecsvc.exe

pid	process
1368	mssecsvc.exe
3616	mssecsvc.exe
1400	tasksche.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 5 IoCs

Processes:

mssecsvc.exe

description	ioc	process
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
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

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1240 wrote to memory of 1616	1240	rundll32.exe	rundll32.exe
PID 1240 wrote to memory of 1616	1240	rundll32.exe	rundll32.exe
PID 1240 wrote to memory of 1616	1240	rundll32.exe	rundll32.exe
PID 1616 wrote to memory of 1368	1616	rundll32.exe	mssecsvc.exe
PID 1616 wrote to memory of 1368	1616	rundll32.exe	mssecsvc.exe
PID 1616 wrote to memory of 1368	1616	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\76c2f0bc0c37fe765f7c147cb72edb62_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1240

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\76c2f0bc0c37fe765f7c147cb72edb62_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1616

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1368

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:1400

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3616

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
481e5fab3071074c36f0a8b24fbb0777

SHA1
adfb30626b3ff66306bba5fdd86566f92a8a5985

SHA256
317dbb6511b79af9727a1b5542afcc1a9c808e8b998ed845734ee9de6ea9676a

SHA512
3ea38a98f8823d3d376bdb18394af8f47ea3e25e76794cbee76fcc55366b0c87963101de21fe54e93a37d21be00d7c9aed0b56b4151c4d143bd861dfa25b3457

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
831b7cfbfa474f35bb2b37f69fad80f6

SHA1
7fd8c6b68754d29954ddbbdbb4960e02c17ac630

SHA256
563fd6ea2af4dab336e868ed4456ba21abcf60fb647f20baa1f64aa5d67897ca

SHA512
a86755d7d21c79f1b2abfb59c6f0295a8bd0c5f0a0c217750ad35c13d0d37fca64e3ce6bfae935164751fd0b9151da9331bcfc62ba507c4beb9b13a346b28140

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