wannacry | 23f9594f4ee3d3bba6d034e0ea1d187010a3de19b32f3769fdac6377421c605c

General

Target

8f50235eb7fea93369e15c844b9625d9_JaffaCakes118.dll
Size

5.0MB
MD5

8f50235eb7fea93369e15c844b9625d9
SHA1

3f14bbf01eecf59b8515dff2e3f1099668429a63
SHA256

23f9594f4ee3d3bba6d034e0ea1d187010a3de19b32f3769fdac6377421c605c
SHA512

cd90dc3a21f14b4246daf9c78b1338de644ece53421da7ff7d752475275a8982f1c42a4207e03f97cbb26a87c144db58d095e3394be6c16621780ef9da6d64ff
SSDEEP

98304:TDqPochz1aRxcSUDk36SAEdhvxWa9P593R8yAVp2H:TDqPb1Cxcxk3ZAEUadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3191) 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

552 mssecsvc.exe
2544 mssecsvc.exe
2748 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
552	mssecsvc.exe
2544	mssecsvc.exe
2748	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	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f0122000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{FB11FAEB-9F3A-46BA-9E6F-59FBED2ED9EE}\WpadDecision = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\02-e5-93-0e-bb-31	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	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	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\02-e5-93-0e-bb-31\WpadDecision = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	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 (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{FB11FAEB-9F3A-46BA-9E6F-59FBED2ED9EE}\WpadDecisionReason = "1"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{FB11FAEB-9F3A-46BA-9E6F-59FBED2ED9EE}\WpadNetworkName = "Network 3"	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 (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\Wpad\{FB11FAEB-9F3A-46BA-9E6F-59FBED2ED9EE}	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{FB11FAEB-9F3A-46BA-9E6F-59FBED2ED9EE}\WpadDecisionTime = 7094912f2bb5da01	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{FB11FAEB-9F3A-46BA-9E6F-59FBED2ED9EE}\02-e5-93-0e-bb-31	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\02-e5-93-0e-bb-31\WpadDecisionReason = "1"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\02-e5-93-0e-bb-31\WpadDecisionTime = 7094912f2bb5da01	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 3056 wrote to memory of 908	3056	rundll32.exe	rundll32.exe
PID 3056 wrote to memory of 908	3056	rundll32.exe	rundll32.exe
PID 3056 wrote to memory of 908	3056	rundll32.exe	rundll32.exe
PID 3056 wrote to memory of 908	3056	rundll32.exe	rundll32.exe
PID 3056 wrote to memory of 908	3056	rundll32.exe	rundll32.exe
PID 3056 wrote to memory of 908	3056	rundll32.exe	rundll32.exe
PID 3056 wrote to memory of 908	3056	rundll32.exe	rundll32.exe
PID 908 wrote to memory of 552	908	rundll32.exe	mssecsvc.exe
PID 908 wrote to memory of 552	908	rundll32.exe	mssecsvc.exe
PID 908 wrote to memory of 552	908	rundll32.exe	mssecsvc.exe
PID 908 wrote to memory of 552	908	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8f50235eb7fea93369e15c844b9625d9_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3056

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8f50235eb7fea93369e15c844b9625d9_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:908

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:552

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2748

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:2544

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
6f5620d2490c007b2dab42c48b0fcf10

SHA1
811cb340a02cc4aa460cd79b0dce5c786ecfa7b9

SHA256
3137f4e505635e3bab605983958c004a3924f48293fb056dffd416a53c23f517

SHA512
f11164414b4b6ec0588723f5754cf2db42de7ac1f7f7f8871da7d337630c31eb84d9da80be782f555020cbf95e47f6dea2683b884d473bba1b550d47f82f94f9

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
efe03eea89f435009e1f887c151bb5be

SHA1
93c32127498e96b68502987a599198ce6696abca

SHA256
a950ae49e9c64a42c2a3267b85687292121f417601f4f1833457884ae3146796

SHA512
c7200efe36c799d5701c356fba3bc66fd59f3bbe7d5dba2c74be447707b0300ade6137c69cd00ff245e62093d6f714dd87f315c9ce8b39a3eddf234ecf9e9ff1

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads