wannacry | 27b656167ee5504bcd296075509bcbdb09b1aba52aec630ec84d23b0a2dbd90e

General

Target

27b656167ee5504bcd296075509bcbdb09b1aba52aec630ec84d23b0a2dbd90e.dll
Size

5.0MB
MD5

118eedee15f92a246867fed1e15bfda1
SHA1

5ff90cf70d36d8be902e23bba87e9df6ccb3dad7
SHA256

27b656167ee5504bcd296075509bcbdb09b1aba52aec630ec84d23b0a2dbd90e
SHA512

7259fcad1c439c2b901203d1f35ed2569dfa6f0018b33c6710343cf731c0a7c09a6aa7a20b37fd57b393c536a3d399da37bc068a1a646f17350c68d959040c8b

Score

10^/10

wannacry discovery ransomware suricata worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
suricata: ET MALWARE Known Sinkhole Response Kryptos Logic
suricata: ET MALWARE Known Sinkhole Response Kryptos Logic
suricata
suricata: ET MALWARE W32/WannaCry.Ransomware Killswitch Domain HTTP Request 1
suricata: ET MALWARE W32/WannaCry.Ransomware Killswitch Domain HTTP Request 1
suricata
Contacts a large (3168) 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

2064 mssecsvc.exe
3104 mssecsvc.exe
1608 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:

mssecsvc.exerundll32.exe

description ioc process

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

pid	process
2064	mssecsvc.exe
3104	mssecsvc.exe
1608	tasksche.exe

description	ioc	process
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe
File created	C:\WINDOWS\mssecsvc.exe	rundll32.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 4628 wrote to memory of 4884	4628	rundll32.exe	rundll32.exe
PID 4628 wrote to memory of 4884	4628	rundll32.exe	rundll32.exe
PID 4628 wrote to memory of 4884	4628	rundll32.exe	rundll32.exe
PID 4884 wrote to memory of 2064	4884	rundll32.exe	mssecsvc.exe
PID 4884 wrote to memory of 2064	4884	rundll32.exe	mssecsvc.exe
PID 4884 wrote to memory of 2064	4884	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\27b656167ee5504bcd296075509bcbdb09b1aba52aec630ec84d23b0a2dbd90e.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4628

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\27b656167ee5504bcd296075509bcbdb09b1aba52aec630ec84d23b0a2dbd90e.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4884

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2064

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:1608

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3104

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Scanning

2

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\WINDOWS\mssecsvc.exe
Filesize
3.6MB

MD5
661fdd674e5b970bd6c16b79157dca7b

SHA1
4845c77b316f47a4a4451f49af0557bfcb9414c7

SHA256
f7bc720a877190d678b5aed7c5f17c6a08ee44d3c7b81f8bf951dc309ed242d0

SHA512
f6e2f9ca3bebf7913d20431fec77f557c1a23950b9001496fa99fd6d1a207cabbca2f0ab78d05c6c8ff5d2b35c49287edc01c797b4e557b0e45cecea32ea2083

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

MD5
661fdd674e5b970bd6c16b79157dca7b

SHA1
4845c77b316f47a4a4451f49af0557bfcb9414c7

SHA256
f7bc720a877190d678b5aed7c5f17c6a08ee44d3c7b81f8bf951dc309ed242d0

SHA512
f6e2f9ca3bebf7913d20431fec77f557c1a23950b9001496fa99fd6d1a207cabbca2f0ab78d05c6c8ff5d2b35c49287edc01c797b4e557b0e45cecea32ea2083

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

MD5
661fdd674e5b970bd6c16b79157dca7b

SHA1
4845c77b316f47a4a4451f49af0557bfcb9414c7

SHA256
f7bc720a877190d678b5aed7c5f17c6a08ee44d3c7b81f8bf951dc309ed242d0

SHA512
f6e2f9ca3bebf7913d20431fec77f557c1a23950b9001496fa99fd6d1a207cabbca2f0ab78d05c6c8ff5d2b35c49287edc01c797b4e557b0e45cecea32ea2083

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

MD5
f7a6deedaa31614b07e5407e02404a77

SHA1
39396676c7c3b17737d3d54104e391c9b3980469

SHA256
bc063fe618ebd42fd8750193a963f9296301f34d979dc0fd89624caf7bb5c3d0

SHA512
93edd5f22678c76271f24d62aa3d7623294279f74d905a18c470c28ad6fe6262080f852daf8f6d328d9e2008688a346b738022429aae06cacbb9c5de46ab157a

Download Submit
memory/2064-131-0x0000000000000000-mapping.dmp

Download
memory/4884-130-0x0000000000000000-mapping.dmp

Download

Analysis

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