wannacry | b4f5ae81cfd91bef403be54221d5a6674d9fd49c3c99dd43cd6fd650d27124c9

General

Target

ab9a268d6f83180b97d654ae87bd798d_JaffaCakes118.dll
Size

5.0MB
MD5

ab9a268d6f83180b97d654ae87bd798d
SHA1

4439672d2d2e5d7f9d75e77b41f730fd8f872efd
SHA256

b4f5ae81cfd91bef403be54221d5a6674d9fd49c3c99dd43cd6fd650d27124c9
SHA512

ace15525fda3efaa1227c7d6649365eb480c7395572a2231f968cb25f7150c86d0aa48b791b847525f671e55faea278bed508ab1f1bbd137a65aa33c35617eec
SSDEEP

98304:TDqPoBhz1aRxcSUDk36SAEdhvxWa9P593R8yAVp2s:TDqPe1Cxcxk3ZAEUadzR8yc4s

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3265) 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

1236 mssecsvc.exe
2568 mssecsvc.exe
2600 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
1236	mssecsvc.exe
2568	mssecsvc.exe
2600	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
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 = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f005d000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{57E56792-F0D7-4860-A3A9-3E90F5E6A37F}\WpadDecisionReason = "1"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{57E56792-F0D7-4860-A3A9-3E90F5E6A37F}\WpadDecisionTime = 60a9270da4beda01	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\ProxyEnable = "0"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{57E56792-F0D7-4860-A3A9-3E90F5E6A37F}\WpadNetworkName = "Network 3"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\fe-e8-30-6b-d2-37	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{57E56792-F0D7-4860-A3A9-3E90F5E6A37F}	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\Connections	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{57E56792-F0D7-4860-A3A9-3E90F5E6A37F}\fe-e8-30-6b-d2-37	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\fe-e8-30-6b-d2-37\WpadDecision = "0"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{57E56792-F0D7-4860-A3A9-3E90F5E6A37F}\WpadDecision = "0"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\fe-e8-30-6b-d2-37\WpadDecisionReason = "1"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\fe-e8-30-6b-d2-37\WpadDecisionTime = 60a9270da4beda01	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	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\UNCAsIntranet = "0"	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1176 wrote to memory of 1960	1176	rundll32.exe	rundll32.exe
PID 1176 wrote to memory of 1960	1176	rundll32.exe	rundll32.exe
PID 1176 wrote to memory of 1960	1176	rundll32.exe	rundll32.exe
PID 1176 wrote to memory of 1960	1176	rundll32.exe	rundll32.exe
PID 1176 wrote to memory of 1960	1176	rundll32.exe	rundll32.exe
PID 1176 wrote to memory of 1960	1176	rundll32.exe	rundll32.exe
PID 1176 wrote to memory of 1960	1176	rundll32.exe	rundll32.exe
PID 1960 wrote to memory of 1236	1960	rundll32.exe	mssecsvc.exe
PID 1960 wrote to memory of 1236	1960	rundll32.exe	mssecsvc.exe
PID 1960 wrote to memory of 1236	1960	rundll32.exe	mssecsvc.exe
PID 1960 wrote to memory of 1236	1960	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ab9a268d6f83180b97d654ae87bd798d_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1176

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ab9a268d6f83180b97d654ae87bd798d_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1960

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1236

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2600

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:2568

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
7a9b19308740068ec19844ae760bdbde

SHA1
3848f9a0904c070232a8cb1bbc647c91ec4f2740

SHA256
38ffd3d0cbae63b80e6a8bc240c0817b9aff3456e76f108100883d6ab6f79790

SHA512
b30f783e7083fd4769e51c82ee9f3fd840ead4379fc750bc0e21b0bf502af000975221650a63a869e65bc3773a2e4f5d395b27a73d82b58a3820acf1f77e9393

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
b28af569881d85a183a91438bc35abb1

SHA1
857e19e8f2f9dd6c3a43f2defcf214fe116affca

SHA256
837aa77b122962862d55e37c10f1544db08aaaf095d877e6265d7025334343b5

SHA512
59614eba8868c06c159537bf594af154b56bb0f2f0c4ec09a104b5073526507e58836f3f16b454fa95327983359baf7e2f02ede4c597ab412be18dc574d26ec5

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads