wannacry | 867150935ecc2ec3dc3051d0446cf1325c5e5d17e26340727c828cdefe61c03e

General

Target

541244c6529f99813eae1f884512a978.dll
Size

5.0MB
MD5

541244c6529f99813eae1f884512a978
SHA1

7a5fa963919ee42a7901134f79cd4c7415df1492
SHA256

867150935ecc2ec3dc3051d0446cf1325c5e5d17e26340727c828cdefe61c03e
SHA512

aea44567a73a99928453e047ad2c8c18ec10a946e1d3c2fbc075a0dde206dd33c3dcb93977740a83140128fe0eb79fb2c5262ca73d196d8df4f64b4bdb0cb207

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1271) 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

1016 mssecsvr.exe
968 mssecsvr.exe

pid	process
1016	mssecsvr.exe
968	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	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C8490C58-6392-42BA-A4F6-9BFA049C02B9}\WpadDecision = "0"	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C8490C58-6392-42BA-A4F6-9BFA049C02B9}\WpadNetworkName = "Network 3"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	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\ZoneMap\	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C8490C58-6392-42BA-A4F6-9BFA049C02B9}	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\ca-73-de-ca-c2-7d	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\ca-73-de-ca-c2-7d\WpadDecisionReason = "1"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\ca-73-de-ca-c2-7d\WpadDecisionTime = 702db18beb9bd801	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "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
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 = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00c4000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C8490C58-6392-42BA-A4F6-9BFA049C02B9}\ca-73-de-ca-c2-7d	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\ca-73-de-ca-c2-7d\WpadDecision = "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\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 (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C8490C58-6392-42BA-A4F6-9BFA049C02B9}\WpadDecisionReason = "1"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C8490C58-6392-42BA-A4F6-9BFA049C02B9}\WpadDecisionTime = 702db18beb9bd801	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1892 wrote to memory of 1676	1892	rundll32.exe	rundll32.exe
PID 1892 wrote to memory of 1676	1892	rundll32.exe	rundll32.exe
PID 1892 wrote to memory of 1676	1892	rundll32.exe	rundll32.exe
PID 1892 wrote to memory of 1676	1892	rundll32.exe	rundll32.exe
PID 1892 wrote to memory of 1676	1892	rundll32.exe	rundll32.exe
PID 1892 wrote to memory of 1676	1892	rundll32.exe	rundll32.exe
PID 1892 wrote to memory of 1676	1892	rundll32.exe	rundll32.exe
PID 1676 wrote to memory of 1016	1676	rundll32.exe	mssecsvr.exe
PID 1676 wrote to memory of 1016	1676	rundll32.exe	mssecsvr.exe
PID 1676 wrote to memory of 1016	1676	rundll32.exe	mssecsvr.exe
PID 1676 wrote to memory of 1016	1676	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\541244c6529f99813eae1f884512a978.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1892

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\541244c6529f99813eae1f884512a978.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1676

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1016

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:968

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

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Downloads

C:\WINDOWS\mssecsvr.exe

Filesize
2.2MB

MD5
0276eefd8c4aa0251f91970d6b5c7b06

SHA1
b0e9fb5611be918bfb22687d124917d17afeb925

SHA256
e88ddba41c108036ae73061fd536e1a3f6e4719cbf9cbc9078cf59f62c6da470

SHA512
36d81e55f973286f3680701bb4c38ec7f49099bcdff12832e1a5c1362b331023511f2a883d2438a9fbf7e6f50dc9f8ff4507d850ec5be4af804fd31b446c126d

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
0276eefd8c4aa0251f91970d6b5c7b06

SHA1
b0e9fb5611be918bfb22687d124917d17afeb925

SHA256
e88ddba41c108036ae73061fd536e1a3f6e4719cbf9cbc9078cf59f62c6da470

SHA512
36d81e55f973286f3680701bb4c38ec7f49099bcdff12832e1a5c1362b331023511f2a883d2438a9fbf7e6f50dc9f8ff4507d850ec5be4af804fd31b446c126d

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
0276eefd8c4aa0251f91970d6b5c7b06

SHA1
b0e9fb5611be918bfb22687d124917d17afeb925

SHA256
e88ddba41c108036ae73061fd536e1a3f6e4719cbf9cbc9078cf59f62c6da470

SHA512
36d81e55f973286f3680701bb4c38ec7f49099bcdff12832e1a5c1362b331023511f2a883d2438a9fbf7e6f50dc9f8ff4507d850ec5be4af804fd31b446c126d

Download Submit
memory/1016-56-0x0000000000000000-mapping.dmp

Download
memory/1676-54-0x0000000000000000-mapping.dmp

Download
memory/1676-55-0x0000000076071000-0x0000000076073000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads