wannacry | b5248a20ec1173991c977fa52a8aebbae35f0123be80fe120e827cb0fb5d82cc

General

Target

34d281dc1cf62696c6d3b5897243aabc.dll
Size

5.0MB
MD5

34d281dc1cf62696c6d3b5897243aabc
SHA1

b5e94cc591d9acd1f04e16d2af251553ee561e0c
SHA256

b5248a20ec1173991c977fa52a8aebbae35f0123be80fe120e827cb0fb5d82cc
SHA512

80a8c192ce8787a4bf767e9b1a0ae60ba4cb77b88522a78e6d876fd5eb10d1eeffa8edfb99e5db82fbbdf586ac4f16af14bbbec5a95387a233f68b81254853de

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1258) 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

1148 mssecsvr.exe
1328 mssecsvr.exe

pid	process
1148	mssecsvr.exe
1328	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\Connections	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 (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\{DDD376C1-A934-4862-A477-420673A0EB55}\WpadNetworkName = "Network 3"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\4a-be-6e-b9-73-90	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\4a-be-6e-b9-73-90\WpadDecision = "0"	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\ZoneMap\AutoDetect = "1"	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{DDD376C1-A934-4862-A477-420673A0EB55}	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{DDD376C1-A934-4862-A477-420673A0EB55}\WpadDecisionReason = "1"	mssecsvr.exe
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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00b9000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{DDD376C1-A934-4862-A477-420673A0EB55}\WpadDecisionTime = 3008c326ea9bd801	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{DDD376C1-A934-4862-A477-420673A0EB55}\WpadDecision = "0"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{DDD376C1-A934-4862-A477-420673A0EB55}\4a-be-6e-b9-73-90	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\4a-be-6e-b9-73-90\WpadDecisionReason = "1"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\4a-be-6e-b9-73-90\WpadDecisionTime = 3008c326ea9bd801	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1856 wrote to memory of 1816	1856	rundll32.exe	rundll32.exe
PID 1856 wrote to memory of 1816	1856	rundll32.exe	rundll32.exe
PID 1856 wrote to memory of 1816	1856	rundll32.exe	rundll32.exe
PID 1856 wrote to memory of 1816	1856	rundll32.exe	rundll32.exe
PID 1856 wrote to memory of 1816	1856	rundll32.exe	rundll32.exe
PID 1856 wrote to memory of 1816	1856	rundll32.exe	rundll32.exe
PID 1856 wrote to memory of 1816	1856	rundll32.exe	rundll32.exe
PID 1816 wrote to memory of 1148	1816	rundll32.exe	mssecsvr.exe
PID 1816 wrote to memory of 1148	1816	rundll32.exe	mssecsvr.exe
PID 1816 wrote to memory of 1148	1816	rundll32.exe	mssecsvr.exe
PID 1816 wrote to memory of 1148	1816	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\34d281dc1cf62696c6d3b5897243aabc.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1856

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\34d281dc1cf62696c6d3b5897243aabc.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1816

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1148

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:1328

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

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Downloads

C:\WINDOWS\mssecsvr.exe

Filesize
2.2MB

MD5
1c9d034deb52ac7bf38a565728d94886

SHA1
9459d340dbfff28b74c057a57cde24f9239129da

SHA256
c4a371863414f04f0ed7b2028094823301bcbea4f40e7f94104046c98d315fd8

SHA512
a673e2c6140bf3ce005edd3ebdb9f92bc3118fb94e5499d6ca5c7a51261fa2059b2b677c084986400ac25d1b7497472fe390530b858d42c99408e4f6d6869d2f

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
1c9d034deb52ac7bf38a565728d94886

SHA1
9459d340dbfff28b74c057a57cde24f9239129da

SHA256
c4a371863414f04f0ed7b2028094823301bcbea4f40e7f94104046c98d315fd8

SHA512
a673e2c6140bf3ce005edd3ebdb9f92bc3118fb94e5499d6ca5c7a51261fa2059b2b677c084986400ac25d1b7497472fe390530b858d42c99408e4f6d6869d2f

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
1c9d034deb52ac7bf38a565728d94886

SHA1
9459d340dbfff28b74c057a57cde24f9239129da

SHA256
c4a371863414f04f0ed7b2028094823301bcbea4f40e7f94104046c98d315fd8

SHA512
a673e2c6140bf3ce005edd3ebdb9f92bc3118fb94e5499d6ca5c7a51261fa2059b2b677c084986400ac25d1b7497472fe390530b858d42c99408e4f6d6869d2f

Download Submit
memory/1148-56-0x0000000000000000-mapping.dmp

Download
memory/1816-54-0x0000000000000000-mapping.dmp

Download
memory/1816-55-0x0000000075831000-0x0000000075833000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads