wannacry | 7ab78920ad07396864187254f5323571807df03ca90c6b5eab2d1c8d0c27b4d5

General

Target

4c58581fa08accc15994f3db1098a5bc_JaffaCakes118.dll
Size

5.0MB
MD5

4c58581fa08accc15994f3db1098a5bc
SHA1

1a349b33c6cc821b814138eb9619fcbce20e6eda
SHA256

7ab78920ad07396864187254f5323571807df03ca90c6b5eab2d1c8d0c27b4d5
SHA512

99e85447b5c2a3380cb9add92c5ca2ded417cdc1de2fbc3655b32014a53fd7202cdf6cda6955bbc8605bd6667cffafc9df3a04b10e0dcf15079481ede3b62da1
SSDEEP

49152:znAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAA8Kx/aa56L:TDqPoBhz1aRxcSUDk36SANKx/ag6L

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3272) 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 3 IoCs

Processes:

mssecsvc.exemssecsvc.exetasksche.exe

pid process

2100 mssecsvc.exe
1940 mssecsvc.exe
2784 tasksche.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
2100	mssecsvc.exe
1940	mssecsvc.exe
2784	tasksche.exe

Drops file in System32 directory 1 IoCs

Processes:

mssecsvc.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	mssecsvc.exe

Drops file in Windows directory 2 IoCs

Processes:

rundll32.exemssecsvc.exe

description ioc process

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

description	ioc	process
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe

Modifies data under HKEY_USERS 24 IoCs

Processes:

mssecsvc.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00b8000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A1FDC582-3E84-4527-9FAF-D107657F8D0F}\WpadDecisionTime = f03c859423d7da01	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A1FDC582-3E84-4527-9FAF-D107657F8D0F}\WpadNetworkName = "Network 3"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\7e-3f-54-bb-1c-d0\WpadDecision = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A1FDC582-3E84-4527-9FAF-D107657F8D0F}	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A1FDC582-3E84-4527-9FAF-D107657F8D0F}\WpadDecisionReason = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A1FDC582-3E84-4527-9FAF-D107657F8D0F}\WpadDecision = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\7e-3f-54-bb-1c-d0	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A1FDC582-3E84-4527-9FAF-D107657F8D0F}\7e-3f-54-bb-1c-d0	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\7e-3f-54-bb-1c-d0\WpadDecisionReason = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\7e-3f-54-bb-1c-d0\WpadDecisionTime = f03c859423d7da01	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 2976 wrote to memory of 2524	2976	rundll32.exe	rundll32.exe
PID 2976 wrote to memory of 2524	2976	rundll32.exe	rundll32.exe
PID 2976 wrote to memory of 2524	2976	rundll32.exe	rundll32.exe
PID 2976 wrote to memory of 2524	2976	rundll32.exe	rundll32.exe
PID 2976 wrote to memory of 2524	2976	rundll32.exe	rundll32.exe
PID 2976 wrote to memory of 2524	2976	rundll32.exe	rundll32.exe
PID 2976 wrote to memory of 2524	2976	rundll32.exe	rundll32.exe
PID 2524 wrote to memory of 2100	2524	rundll32.exe	mssecsvc.exe
PID 2524 wrote to memory of 2100	2524	rundll32.exe	mssecsvc.exe
PID 2524 wrote to memory of 2100	2524	rundll32.exe	mssecsvc.exe
PID 2524 wrote to memory of 2100	2524	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\4c58581fa08accc15994f3db1098a5bc_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2976

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\4c58581fa08accc15994f3db1098a5bc_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2524

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2100

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2784

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:1940

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\mssecsvc.exe

Filesize
3.6MB

MD5
9bcd08d46432b6dac27417b0de3da8b1

SHA1
d16fae609a6cc1049fb008039555c2cc67db8638

SHA256
4beab4d0d34aa39daecd1846d8a574aacbda506618bdbabc3ffeea46e121e774

SHA512
b987e4b323fc59b82b71f4f5e0fe71b0324811247ab488c19688cdc1430322deaadb6b73528178277b3ac9e3e89f5f938381b768839d99e7a72600ea5dfd636a

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
82246a37bc2b94a29240a8b49de5cf57

SHA1
60d6df7c05d3a037adb5ff61a563a7ae7ab00f36

SHA256
372be1952cbc480ee462d263e3e067b82ae542e7b65789508575642bd960f18e

SHA512
047cab5fb0ef6bf88db1fe2fbf7200cf810a1b057e9b3488e32a6d8cf96dd56e9d397c5dc16885f48aca4d858a3612af74284819e50006e3279bcf9642200289

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads