wannacry | 8837f653df7ca3316c21ff0fe7e4e0094b8e84ee53f95222a927132a8f67782c

Analysis

max time kernel
151s
max time network
155s
platform
windows7_x64
resource
win7-20220715-en
resource tags

arch:x64arch:x86image:win7-20220715-enlocale:en-usos:windows7-x64system
submitted
20-07-2022 02:44

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General

Target

9a14a942a549ab228d6e3415b2a0133b.dll
Size

5.0MB
MD5

9a14a942a549ab228d6e3415b2a0133b
SHA1

448617e6e41a7e73163a12eace27019f94695932
SHA256

8837f653df7ca3316c21ff0fe7e4e0094b8e84ee53f95222a927132a8f67782c
SHA512

2994e31e9f16ad5fb67305971bff022c7e225054595f30384dfc315344aac98d7ffb07828a822ae8deacd371e836c3d3c5f3f4c0343b01dd1dc81630533ad2a0

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1225) 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 2 IoCs

Processes:

mssecsvr.exemssecsvr.exe

pid process

1940 mssecsvr.exe
1384 mssecsvr.exe

pid	process
1940	mssecsvr.exe
1384	mssecsvr.exe

Drops file in System32 directory 1 IoCs

Processes:

mssecsvr.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	mssecsvr.exe

Drops file in Windows directory 2 IoCs

Processes:

rundll32.exemssecsvr.exe

description ioc process

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

Processes:

mssecsvr.exe

description ioc process

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

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

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

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 576 wrote to memory of 1108	576	rundll32.exe	rundll32.exe
PID 576 wrote to memory of 1108	576	rundll32.exe	rundll32.exe
PID 576 wrote to memory of 1108	576	rundll32.exe	rundll32.exe
PID 576 wrote to memory of 1108	576	rundll32.exe	rundll32.exe
PID 576 wrote to memory of 1108	576	rundll32.exe	rundll32.exe
PID 576 wrote to memory of 1108	576	rundll32.exe	rundll32.exe
PID 576 wrote to memory of 1108	576	rundll32.exe	rundll32.exe
PID 1108 wrote to memory of 1940	1108	rundll32.exe	mssecsvr.exe
PID 1108 wrote to memory of 1940	1108	rundll32.exe	mssecsvr.exe
PID 1108 wrote to memory of 1940	1108	rundll32.exe	mssecsvr.exe
PID 1108 wrote to memory of 1940	1108	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\9a14a942a549ab228d6e3415b2a0133b.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:576

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\9a14a942a549ab228d6e3415b2a0133b.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1108

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1940

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:1384

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Scanning

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\WINDOWS\mssecsvr.exe

Filesize
2.2MB

MD5
213f29ca85a360f2f1b2b3411cb6b890

SHA1
597497de8ee139df2e75559867ad4a15d1bc8cf9

SHA256
41e55c6f480c8e57bf3aacc8b17ff8c6cf27fdbaac75f861411a27a698c54dc1

SHA512
574296f6a27c678552619fd38346153b9a8799c6f603036f2b16800345d98ff917f1d3333e828dba5f626e1d6151bd85c5975e2b3eac60299dff10b1b1d4c4b3

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
213f29ca85a360f2f1b2b3411cb6b890

SHA1
597497de8ee139df2e75559867ad4a15d1bc8cf9

SHA256
41e55c6f480c8e57bf3aacc8b17ff8c6cf27fdbaac75f861411a27a698c54dc1

SHA512
574296f6a27c678552619fd38346153b9a8799c6f603036f2b16800345d98ff917f1d3333e828dba5f626e1d6151bd85c5975e2b3eac60299dff10b1b1d4c4b3

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
213f29ca85a360f2f1b2b3411cb6b890

SHA1
597497de8ee139df2e75559867ad4a15d1bc8cf9

SHA256
41e55c6f480c8e57bf3aacc8b17ff8c6cf27fdbaac75f861411a27a698c54dc1

SHA512
574296f6a27c678552619fd38346153b9a8799c6f603036f2b16800345d98ff917f1d3333e828dba5f626e1d6151bd85c5975e2b3eac60299dff10b1b1d4c4b3

Download Submit
memory/1108-54-0x0000000000000000-mapping.dmp

Download
memory/1108-55-0x0000000076631000-0x0000000076633000-memory.dmp

Filesize
8KB

Download
memory/1940-56-0x0000000000000000-mapping.dmp

Download