wannacry | cbb03a955d1f67c11be512805cc5d0201b14d71bef2d381fae902cfa7729319f

General

Target

752fc35efbf506085effec3eab207f8c.dll
Size

5.0MB
MD5

752fc35efbf506085effec3eab207f8c
SHA1

1638ef45caea208a350b6c77720a7224126ec6a4
SHA256

cbb03a955d1f67c11be512805cc5d0201b14d71bef2d381fae902cfa7729319f
SHA512

24d576c16bd7c3c2d06aef635944198cfeede41cea8dcee1a2bea477bcde65ebd184b95f4cce2e68edfacf2e799d40f669acbd8696ba4bc21d632f0e35e5db90

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1303) 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

892 mssecsvr.exe
1696 mssecsvr.exe

pid	process
892	mssecsvr.exe
1696	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
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	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\{CC7B9447-BD8D-4E20-895C-6B6F7836A7AF}\WpadDecision = "0"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\aa-9a-b0-7d-5c-4f	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{CC7B9447-BD8D-4E20-895C-6B6F7836A7AF}\aa-9a-b0-7d-5c-4f	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\aa-9a-b0-7d-5c-4f\WpadDecisionReason = "1"	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\ZoneMap\UNCAsIntranet = "0"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{CC7B9447-BD8D-4E20-895C-6B6F7836A7AF}\WpadNetworkName = "Network 3"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\aa-9a-b0-7d-5c-4f\WpadDecision = "0"	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
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{CC7B9447-BD8D-4E20-895C-6B6F7836A7AF}	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
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 (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00be000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{CC7B9447-BD8D-4E20-895C-6B6F7836A7AF}\WpadDecisionReason = "1"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{CC7B9447-BD8D-4E20-895C-6B6F7836A7AF}\WpadDecisionTime = c0195202f79bd801	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\aa-9a-b0-7d-5c-4f\WpadDecisionTime = c0195202f79bd801	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1876 wrote to memory of 1036	1876	rundll32.exe	rundll32.exe
PID 1876 wrote to memory of 1036	1876	rundll32.exe	rundll32.exe
PID 1876 wrote to memory of 1036	1876	rundll32.exe	rundll32.exe
PID 1876 wrote to memory of 1036	1876	rundll32.exe	rundll32.exe
PID 1876 wrote to memory of 1036	1876	rundll32.exe	rundll32.exe
PID 1876 wrote to memory of 1036	1876	rundll32.exe	rundll32.exe
PID 1876 wrote to memory of 1036	1876	rundll32.exe	rundll32.exe
PID 1036 wrote to memory of 892	1036	rundll32.exe	mssecsvr.exe
PID 1036 wrote to memory of 892	1036	rundll32.exe	mssecsvr.exe
PID 1036 wrote to memory of 892	1036	rundll32.exe	mssecsvr.exe
PID 1036 wrote to memory of 892	1036	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\752fc35efbf506085effec3eab207f8c.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1876

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\752fc35efbf506085effec3eab207f8c.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1036

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:892

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:1696

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
b88e1a8d12b1fb195a27ac9490411876

SHA1
1d5c1fec976a77d049c55fd0a288f02209c96397

SHA256
bee4ba878907042c5114aa0657e9d8d8f3e3f4665460f25d9fc10b00dcdbcab3

SHA512
c56971b29edf981f6830a10cf07956925c10343ff02a819a8d8d66bc115f24cddb826a18f5579e864ce6b3dabf73fef8704bb3a20517b9ab757d3403dae31231

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
b88e1a8d12b1fb195a27ac9490411876

SHA1
1d5c1fec976a77d049c55fd0a288f02209c96397

SHA256
bee4ba878907042c5114aa0657e9d8d8f3e3f4665460f25d9fc10b00dcdbcab3

SHA512
c56971b29edf981f6830a10cf07956925c10343ff02a819a8d8d66bc115f24cddb826a18f5579e864ce6b3dabf73fef8704bb3a20517b9ab757d3403dae31231

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
b88e1a8d12b1fb195a27ac9490411876

SHA1
1d5c1fec976a77d049c55fd0a288f02209c96397

SHA256
bee4ba878907042c5114aa0657e9d8d8f3e3f4665460f25d9fc10b00dcdbcab3

SHA512
c56971b29edf981f6830a10cf07956925c10343ff02a819a8d8d66bc115f24cddb826a18f5579e864ce6b3dabf73fef8704bb3a20517b9ab757d3403dae31231

Download Submit
memory/892-56-0x0000000000000000-mapping.dmp

Download
memory/1036-54-0x0000000000000000-mapping.dmp

Download
memory/1036-55-0x0000000075DC1000-0x0000000075DC3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads