wannacry | f83fb171610f8e38b41401f44c58d3448966fb5a15dedc04a8a015d6d6ac6767

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240704-en
resource tags

arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system
submitted
09-07-2024 00:20

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General

Target

2e5a8ac5174219bcb08d7449e43b1440_JaffaCakes118.dll
Size

5.0MB
MD5

2e5a8ac5174219bcb08d7449e43b1440
SHA1

85b598ce3a40735b1dbb489decfae29ff2bcf319
SHA256

f83fb171610f8e38b41401f44c58d3448966fb5a15dedc04a8a015d6d6ac6767
SHA512

2a66da1f7ae9a007276499bbd025a760897a98a7a315225b555f89c63889e90e1f4415c4e434f5097c441d9d7cf1a6b61a24c03936a0f2b84b7ae4cc6f006eec
SSDEEP

49152:RntMSPbcBVQej/MRx+TSqTdX1HkQo6SAARdhnv:1tPoBhzMRxcSUDk36SAEdhv

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3278) 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

916 mssecsvr.exe
2932 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
916	mssecsvr.exe
2932	mssecsvr.exe

Drops file in System32 directory 4 IoCs

Processes:

mssecsvr.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5	mssecsvr.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE	mssecsvr.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies	mssecsvr.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5	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 15 IoCs

Processes:

mssecsvr.exe

description	ioc	process
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\UNCAsIntranet = "1"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	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	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P\History	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion	mssecsvr.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1524 wrote to memory of 1072	1524	rundll32.exe	rundll32.exe
PID 1524 wrote to memory of 1072	1524	rundll32.exe	rundll32.exe
PID 1524 wrote to memory of 1072	1524	rundll32.exe	rundll32.exe
PID 1072 wrote to memory of 916	1072	rundll32.exe	mssecsvr.exe
PID 1072 wrote to memory of 916	1072	rundll32.exe	mssecsvr.exe
PID 1072 wrote to memory of 916	1072	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2e5a8ac5174219bcb08d7449e43b1440_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1524

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2e5a8ac5174219bcb08d7449e43b1440_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1072

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:916

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:2932

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
d455da7d9475478569d33d949280b1d2

SHA1
a975bcd61e24ac8fd88b3624421e78ccb4ad385f

SHA256
9cf43d2ea01822063f18304562769a3bd07bebbebdeeac58b3d4792690a576c5

SHA512
0131a37f487f404d6754d77816a903ed5e032ffbbf682ec9d9856065c16a73b505f044806df6b0e79cc2c64da3472f7419e429d6b1673d236c40a63a51f99bec

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