wannacry | c6ea883746d0bd6903f2653c409f7618569d22b387800d9189726b4c9deb8078

General

Target

57a8a78851450a008ca6f11da0fefcb4_JaffaCakes118.dll
Size

5.0MB
MD5

57a8a78851450a008ca6f11da0fefcb4
SHA1

94a5feee93f5b0e4ddcfc53c72a75d9976457749
SHA256

c6ea883746d0bd6903f2653c409f7618569d22b387800d9189726b4c9deb8078
SHA512

0192afc1dc6b1a96d89736478f864b22622b87b188813edae2d54bffa659e88eb7250fb7f1a3c42483eb5e27bcdc2345a3c95b6668bd419ffc6e3c56e331a9f5
SSDEEP

49152:RnUQ2MSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhn:1X2PoBhz1aRxcSUDk36SAEdh

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3293) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046
Executes dropped EXE 2 IoCs

Processes:

mssecsvr.exemssecsvr.exe

pid process

1732 mssecsvr.exe
2052 mssecsvr.exe
Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

pid	process
1732	mssecsvr.exe
2052	mssecsvr.exe

Drops file in System32 directory 5 IoCs

Processes:

mssecsvr.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\Microsoft\Windows\Cookies\0X4TKAWL.txt	mssecsvr.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	mssecsvr.exe
File created	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\Microsoft\Windows\Cookies\XRPIGJ13.txt	mssecsvr.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\Microsoft\Windows\Cookies\XRPIGJ13.txt	mssecsvr.exe
File created	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\Microsoft\Windows\Cookies\0X4TKAWL.txt	mssecsvr.exe

Drops file in Windows directory 2 IoCs

Processes:

mssecsvr.exerundll32.exe

description ioc process

File created C:\WINDOWS\tasksche.exe mssecsvr.exe
File created C:\WINDOWS\mssecsvr.exe rundll32.exe

description	ioc	process
File created	C:\WINDOWS\tasksche.exe	mssecsvr.exe
File created	C:\WINDOWS\mssecsvr.exe	rundll32.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\{055487B4-80C8-4500-9EAE-0F46ABFC86FE}\fe-19-2c-3b-32-cc	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\fe-19-2c-3b-32-cc\WpadDecisionReason = "1"	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\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 (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{055487B4-80C8-4500-9EAE-0F46ABFC86FE}\WpadDecisionTime = e03431d91bd9da01	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\fe-19-2c-3b-32-cc	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\Wpad\{055487B4-80C8-4500-9EAE-0F46ABFC86FE}	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\fe-19-2c-3b-32-cc\WpadDecisionTime = e03431d91bd9da01	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\ProxyEnable = "0"	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\Cookies\CachePrefix = "Cookie:"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{055487B4-80C8-4500-9EAE-0F46ABFC86FE}\WpadDecision = "0"	mssecsvr.exe
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\Content\CachePrefix	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00bc000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{055487B4-80C8-4500-9EAE-0F46ABFC86FE}\WpadDecisionReason = "1"	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{055487B4-80C8-4500-9EAE-0F46ABFC86FE}\WpadNetworkName = "Network 3"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\fe-19-2c-3b-32-cc\WpadDecision = "0"	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 2384 wrote to memory of 2160	2384	rundll32.exe	rundll32.exe
PID 2384 wrote to memory of 2160	2384	rundll32.exe	rundll32.exe
PID 2384 wrote to memory of 2160	2384	rundll32.exe	rundll32.exe
PID 2384 wrote to memory of 2160	2384	rundll32.exe	rundll32.exe
PID 2384 wrote to memory of 2160	2384	rundll32.exe	rundll32.exe
PID 2384 wrote to memory of 2160	2384	rundll32.exe	rundll32.exe
PID 2384 wrote to memory of 2160	2384	rundll32.exe	rundll32.exe
PID 2160 wrote to memory of 1732	2160	rundll32.exe	mssecsvr.exe
PID 2160 wrote to memory of 1732	2160	rundll32.exe	mssecsvr.exe
PID 2160 wrote to memory of 1732	2160	rundll32.exe	mssecsvr.exe
PID 2160 wrote to memory of 1732	2160	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\57a8a78851450a008ca6f11da0fefcb4_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2384

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\57a8a78851450a008ca6f11da0fefcb4_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2160

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1732

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:2052

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

2

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
bed596cf11a80723aea14340a6251358

SHA1
4b67bac5a90fb35bd710d71eded5bb38899e0eed

SHA256
0d4876a8c271ab5fc479aab4528fea042ba3df97d54020748586cbc7177b28f2

SHA512
756358ab1c17f4d5f881c39fb08fd2aff38239d93096fc40f329358a19c20d974ca38622cfd4684334619442bcece5e2ac8080dcc3a78937226bd4ca546012a2

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads