wannacry | dcb39eb8303e191e1bd95e6bd1aaf576f66c7db90e1ca4ee9133e8b66b1b0001

Analysis

max time kernel
156s
max time network
161s
platform
windows10-2004_x64
resource
win10v2004-20220718-en
resource tags

arch:x64arch:x86image:win10v2004-20220718-enlocale:en-usos:windows10-2004-x64system
submitted
20-07-2022 03:11

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General

Target

384bb8e3c6009c75472ef44706ddcfe0.dll
Size

5.0MB
MD5

384bb8e3c6009c75472ef44706ddcfe0
SHA1

926802147c70c1853621d01a04f2f47e0d5b3669
SHA256

dcb39eb8303e191e1bd95e6bd1aaf576f66c7db90e1ca4ee9133e8b66b1b0001
SHA512

b0e54f06d2a9ae073831ecf55cda446b40adad97599f2f3a49cfb91812c1ad54a0d6660ee700b63e6da0deb7b8b534508a1892e7503171e9c9af45e00926379d

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3136) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Scanning
T1046
Executes dropped EXE 3 IoCs

Processes:

mssecsvc.exemssecsvc.exetasksche.exe

pid process

2592 mssecsvc.exe
4652 mssecsvc.exe
2264 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 Scanning
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
2592	mssecsvc.exe
4652	mssecsvc.exe
2264	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
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

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 2080 wrote to memory of 3248	2080	rundll32.exe	rundll32.exe
PID 2080 wrote to memory of 3248	2080	rundll32.exe	rundll32.exe
PID 2080 wrote to memory of 3248	2080	rundll32.exe	rundll32.exe
PID 3248 wrote to memory of 2592	3248	rundll32.exe	mssecsvc.exe
PID 3248 wrote to memory of 2592	3248	rundll32.exe	mssecsvc.exe
PID 3248 wrote to memory of 2592	3248	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\384bb8e3c6009c75472ef44706ddcfe0.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2080

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\384bb8e3c6009c75472ef44706ddcfe0.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:3248

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2592

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2264

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4652

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Scanning

T1046

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\WINDOWS\mssecsvc.exe
Filesize
3.6MB

MD5
43994b637c783ce46721df8f239dccda

SHA1
3c319ade0f7da6b341f7ef161bd9d2fdd5d679ef

SHA256
305069f00300db09afba6260de0f588ce10de2c8f015bef0a10682c46431713a

SHA512
e7a162cc9dc71f2c1717ccb3738662438acd8a8d5dce3bb2e0b17a503af268145ff546cf154ed8087ff688ae51e346b59b15528f6427672a09919eb044f7351b

Download Submit
C:\Windows\mssecsvc.exe
Filesize
3.6MB

MD5
43994b637c783ce46721df8f239dccda

SHA1
3c319ade0f7da6b341f7ef161bd9d2fdd5d679ef

SHA256
305069f00300db09afba6260de0f588ce10de2c8f015bef0a10682c46431713a

SHA512
e7a162cc9dc71f2c1717ccb3738662438acd8a8d5dce3bb2e0b17a503af268145ff546cf154ed8087ff688ae51e346b59b15528f6427672a09919eb044f7351b

Download Submit
C:\Windows\mssecsvc.exe
Filesize
3.6MB

MD5
43994b637c783ce46721df8f239dccda

SHA1
3c319ade0f7da6b341f7ef161bd9d2fdd5d679ef

SHA256
305069f00300db09afba6260de0f588ce10de2c8f015bef0a10682c46431713a

SHA512
e7a162cc9dc71f2c1717ccb3738662438acd8a8d5dce3bb2e0b17a503af268145ff546cf154ed8087ff688ae51e346b59b15528f6427672a09919eb044f7351b

Download Submit
C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
cfb4f9435b8486b68c79eb512b87e4b5

SHA1
c093f2d1124422f286e0e960dfa93bddbcfc3bc7

SHA256
d327d99d14bcd439ff7314bed102dfde82997ba223bb118d47bc548b637c6a55

SHA512
47ffa7c2eed5074ff42bd832947ca7f87dde393e4677a23c5cff2c969c92ec513d2df6eaba8a5014fccb9f80d52c05f6ba7cb9664f05bfd53f94b8291be3bad6

Download Submit
memory/2592-131-0x0000000000000000-mapping.dmp

Download
memory/3248-130-0x0000000000000000-mapping.dmp

Download