wannacry | 0140a4d1488d96cdd6ab4212a25d265c85f32e84b48481746433870333ab26c4

Analysis

max time kernel
151s
max time network
154s
platform
windows7_x64
resource
win7-20220715-en
resource tags

arch:x64arch:x86image:win7-20220715-enlocale:en-usos:windows7-x64system
submitted
20-07-2022 03:01

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General

Target

dcf87f36afd7e67cf03843cd03b24979.dll
Size

5.0MB
MD5

dcf87f36afd7e67cf03843cd03b24979
SHA1

2de433a36230aff2475dfddb31f459bd060430e6
SHA256

0140a4d1488d96cdd6ab4212a25d265c85f32e84b48481746433870333ab26c4
SHA512

d1936de4fbedbf977470e96d5d624a3cfbec5a42f9c48e7c4d58925752bfcca8036911678a462deb48e6befc71e1db608dab5c68c1b4012f5f11c891df1eb127

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1290) 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

668 mssecsvr.exe
1892 mssecsvr.exe

pid	process
668	mssecsvr.exe
1892	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 1432 wrote to memory of 1188	1432	rundll32.exe	rundll32.exe
PID 1432 wrote to memory of 1188	1432	rundll32.exe	rundll32.exe
PID 1432 wrote to memory of 1188	1432	rundll32.exe	rundll32.exe
PID 1432 wrote to memory of 1188	1432	rundll32.exe	rundll32.exe
PID 1432 wrote to memory of 1188	1432	rundll32.exe	rundll32.exe
PID 1432 wrote to memory of 1188	1432	rundll32.exe	rundll32.exe
PID 1432 wrote to memory of 1188	1432	rundll32.exe	rundll32.exe
PID 1188 wrote to memory of 668	1188	rundll32.exe	mssecsvr.exe
PID 1188 wrote to memory of 668	1188	rundll32.exe	mssecsvr.exe
PID 1188 wrote to memory of 668	1188	rundll32.exe	mssecsvr.exe
PID 1188 wrote to memory of 668	1188	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\dcf87f36afd7e67cf03843cd03b24979.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1432

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\dcf87f36afd7e67cf03843cd03b24979.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1188

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:668

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:1892

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
84957e7d032517191cdb85f4b72eeff4

SHA1
dbb838c58615d9c60b43dabb405083e1ad5ab44e

SHA256
b65c8e43cd67c57a27c11677b66608b65473d9de05363049b6d0fe6ed9da00bb

SHA512
47209b355705295b53311976abf475d177d4c56b04b051ece78526816f504b395e3370c1d532819a9fd4bfda11f0cc547bd1fe0e26e58eaeeb0c25bf807cb2f7

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
84957e7d032517191cdb85f4b72eeff4

SHA1
dbb838c58615d9c60b43dabb405083e1ad5ab44e

SHA256
b65c8e43cd67c57a27c11677b66608b65473d9de05363049b6d0fe6ed9da00bb

SHA512
47209b355705295b53311976abf475d177d4c56b04b051ece78526816f504b395e3370c1d532819a9fd4bfda11f0cc547bd1fe0e26e58eaeeb0c25bf807cb2f7

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
84957e7d032517191cdb85f4b72eeff4

SHA1
dbb838c58615d9c60b43dabb405083e1ad5ab44e

SHA256
b65c8e43cd67c57a27c11677b66608b65473d9de05363049b6d0fe6ed9da00bb

SHA512
47209b355705295b53311976abf475d177d4c56b04b051ece78526816f504b395e3370c1d532819a9fd4bfda11f0cc547bd1fe0e26e58eaeeb0c25bf807cb2f7

Download Submit
memory/668-56-0x0000000000000000-mapping.dmp

Download
memory/1188-54-0x0000000000000000-mapping.dmp

Download
memory/1188-55-0x0000000076031000-0x0000000076033000-memory.dmp

Filesize
8KB

Download