wannacry | 306592b5c9ddf51d26225e51da3d8f9c3b3e51dc6b101043998cb3fce57cdc7f

General

Target

306592b5c9ddf51d26225e51da3d8f9c3b3e51dc6b101043998cb3fce57cdc7f.dll
Size

5.0MB
MD5

e5253585af59f9701f1a788ae87b9e73
SHA1

e1b192fbbde83210802b354dcef2c37aaa180ee2
SHA256

306592b5c9ddf51d26225e51da3d8f9c3b3e51dc6b101043998cb3fce57cdc7f
SHA512

3cda3ffa99b88ca95c5b52da8a189eac285b9401238355f375b202acbf338b688cb63cb375af791d8a9de38785201f6121a363f5239eb94e41aaff8d67751f70
SSDEEP

24576:RbLgudQhZdmMSirYbcMNgef0QeQjG/D8kIqRYoAdNL:RnNQ8MSPbcBVQej/1IN

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1250) 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

pid	Process
1740	mssecsvr.exe
788	mssecsvr.exe

Drops file in System32 directory 1 IoCs

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

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

description	ioc	Process
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
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\b2-23-73-78-76-09	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\b2-23-73-78-76-09\WpadDecisionReason = "1"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\b2-23-73-78-76-09\WpadDecisionTime = 108a1442bee9d801	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{867A7009-F514-4AD4-B2CC-1953DC11829C}	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{867A7009-F514-4AD4-B2CC-1953DC11829C}\b2-23-73-78-76-09	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\b2-23-73-78-76-09\WpadDecision = "0"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{867A7009-F514-4AD4-B2CC-1953DC11829C}\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\Cookies\CachePrefix = "Cookie:"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f0080000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{867A7009-F514-4AD4-B2CC-1953DC11829C}\WpadDecisionReason = "1"	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{867A7009-F514-4AD4-B2CC-1953DC11829C}\WpadNetworkName = "Network 3"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	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
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 (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{867A7009-F514-4AD4-B2CC-1953DC11829C}\WpadDecisionTime = 108a1442bee9d801	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1348 wrote to memory of 1236	1348	rundll32.exe	26
PID 1348 wrote to memory of 1236	1348	rundll32.exe	26
PID 1348 wrote to memory of 1236	1348	rundll32.exe	26
PID 1348 wrote to memory of 1236	1348	rundll32.exe	26
PID 1348 wrote to memory of 1236	1348	rundll32.exe	26
PID 1348 wrote to memory of 1236	1348	rundll32.exe	26
PID 1348 wrote to memory of 1236	1348	rundll32.exe	26
PID 1236 wrote to memory of 1740	1236	rundll32.exe	27
PID 1236 wrote to memory of 1740	1236	rundll32.exe	27
PID 1236 wrote to memory of 1740	1236	rundll32.exe	27
PID 1236 wrote to memory of 1740	1236	rundll32.exe	27

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\306592b5c9ddf51d26225e51da3d8f9c3b3e51dc6b101043998cb3fce57cdc7f.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1348
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\306592b5c9ddf51d26225e51da3d8f9c3b3e51dc6b101043998cb3fce57cdc7f.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:1236
- - C:\WINDOWS\mssecsvr.exe
    C:\WINDOWS\mssecsvr.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:1740

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:788

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
7bb4ef4acf0262ab3cc0dc4ed6956ea1

SHA1
64ea497a3279880a1f098bf9af008687c68b7574

SHA256
fd41be5e8598ecc061cafeee6c8aada1eb8c5cb557017d81c8fa11aca811bc3f

SHA512
1c6e2e248576d5623b14f14c41af644666cb8b4dd00612b00dfa915f54778d98dcf6546efb297a162e030cd6f5ceabed03209ff9d05e386aa3563d1958afd6be

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
7bb4ef4acf0262ab3cc0dc4ed6956ea1

SHA1
64ea497a3279880a1f098bf9af008687c68b7574

SHA256
fd41be5e8598ecc061cafeee6c8aada1eb8c5cb557017d81c8fa11aca811bc3f

SHA512
1c6e2e248576d5623b14f14c41af644666cb8b4dd00612b00dfa915f54778d98dcf6546efb297a162e030cd6f5ceabed03209ff9d05e386aa3563d1958afd6be

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
7bb4ef4acf0262ab3cc0dc4ed6956ea1

SHA1
64ea497a3279880a1f098bf9af008687c68b7574

SHA256
fd41be5e8598ecc061cafeee6c8aada1eb8c5cb557017d81c8fa11aca811bc3f

SHA512
1c6e2e248576d5623b14f14c41af644666cb8b4dd00612b00dfa915f54778d98dcf6546efb297a162e030cd6f5ceabed03209ff9d05e386aa3563d1958afd6be

Download Submit
memory/1236-54-0x0000000000000000-mapping.dmp

Download
memory/1236-55-0x0000000074F41000-0x0000000074F43000-memory.dmp

Filesize
8KB

Download
memory/1740-56-0x0000000000000000-mapping.dmp

Download

Analysis

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