wannacry | 72ff24923e8f0101d384ce359e014fe06691e2a603c7d1721ec7a477ff825383

General

Target

a04eedfd36add320d1853d5a76efc719.dll
Size

5.0MB
MD5

a04eedfd36add320d1853d5a76efc719
SHA1

f57118b1268c27f96812182291a1f03d05312fea
SHA256

72ff24923e8f0101d384ce359e014fe06691e2a603c7d1721ec7a477ff825383
SHA512

edfeedf28537a31d4c3b7a0e1e2bab386d54af80d4ef4fb9aaaeb51f579fae997e0480385cbff211dacfeda15f4bd2d55acf397aede700ce99840ac6afd4124d

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1302) 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

1344 mssecsvr.exe
2040 mssecsvr.exe

pid	process
1344	mssecsvr.exe
2040	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

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

Modifies data under HKEY_USERS 24 IoCs

Processes:

mssecsvr.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2ECDAD0F-3759-4FEC-B738-022767947BEF}	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2ECDAD0F-3759-4FEC-B738-022767947BEF}\WpadDecisionReason = "1"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2ECDAD0F-3759-4FEC-B738-022767947BEF}\WpadDecisionTime = b0508be3e29bd801	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\16-c3-4b-d0-eb-86	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00c1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2ECDAD0F-3759-4FEC-B738-022767947BEF}\WpadNetworkName = "Network 3"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2ECDAD0F-3759-4FEC-B738-022767947BEF}\16-c3-4b-d0-eb-86	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\16-c3-4b-d0-eb-86\WpadDecisionReason = "1"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\16-c3-4b-d0-eb-86\WpadDecisionTime = b0508be3e29bd801	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\16-c3-4b-d0-eb-86\WpadDecision = "0"	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2ECDAD0F-3759-4FEC-B738-022767947BEF}\WpadDecision = "0"	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1348 wrote to memory of 860	1348	rundll32.exe	rundll32.exe
PID 1348 wrote to memory of 860	1348	rundll32.exe	rundll32.exe
PID 1348 wrote to memory of 860	1348	rundll32.exe	rundll32.exe
PID 1348 wrote to memory of 860	1348	rundll32.exe	rundll32.exe
PID 1348 wrote to memory of 860	1348	rundll32.exe	rundll32.exe
PID 1348 wrote to memory of 860	1348	rundll32.exe	rundll32.exe
PID 1348 wrote to memory of 860	1348	rundll32.exe	rundll32.exe
PID 860 wrote to memory of 1344	860	rundll32.exe	mssecsvr.exe
PID 860 wrote to memory of 1344	860	rundll32.exe	mssecsvr.exe
PID 860 wrote to memory of 1344	860	rundll32.exe	mssecsvr.exe
PID 860 wrote to memory of 1344	860	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a04eedfd36add320d1853d5a76efc719.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1348

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a04eedfd36add320d1853d5a76efc719.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:860

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1344

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:2040

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Scanning

1

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\WINDOWS\mssecsvr.exe
Filesize
2.2MB

MD5
593db3849fe4faa244b4cf94dabdfd35

SHA1
6a2e46953820e7859b3b468efe053249a13678a3

SHA256
dc9bc5110090fe1fcac02faf801d6c7aff6ee779df65ff2cc079efb1dd44469a

SHA512
b46e3f62b26ed3a1cf73132ee6b82c919596053f38d07b4cf069a2b3ac3ca5f32a3345e18b6735afd4b555b8bcaab2e6be2b6da13b5996b4179f92c109566b38

Download Submit
C:\Windows\mssecsvr.exe
Filesize
2.2MB

MD5
593db3849fe4faa244b4cf94dabdfd35

SHA1
6a2e46953820e7859b3b468efe053249a13678a3

SHA256
dc9bc5110090fe1fcac02faf801d6c7aff6ee779df65ff2cc079efb1dd44469a

SHA512
b46e3f62b26ed3a1cf73132ee6b82c919596053f38d07b4cf069a2b3ac3ca5f32a3345e18b6735afd4b555b8bcaab2e6be2b6da13b5996b4179f92c109566b38

Download Submit
C:\Windows\mssecsvr.exe
Filesize
2.2MB

MD5
593db3849fe4faa244b4cf94dabdfd35

SHA1
6a2e46953820e7859b3b468efe053249a13678a3

SHA256
dc9bc5110090fe1fcac02faf801d6c7aff6ee779df65ff2cc079efb1dd44469a

SHA512
b46e3f62b26ed3a1cf73132ee6b82c919596053f38d07b4cf069a2b3ac3ca5f32a3345e18b6735afd4b555b8bcaab2e6be2b6da13b5996b4179f92c109566b38

Download Submit
memory/860-54-0x0000000000000000-mapping.dmp

Download
memory/860-55-0x00000000762D1000-0x00000000762D3000-memory.dmp

Filesize
8KB

Download
memory/1344-56-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads