wannacry | edd1fbcf42000838a7cb6bc32d4f41d8c2f894c0e749f0239b238d0432d0bf92

Analysis

max time kernel
163s
max time network
161s
platform
windows7_x64
resource
win7v20201028
submitted
26-12-2020 20:16

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General

Target

WannaCry/Trojan-Ransom.Win32.Wanna.m.2e5a8ac5174219bcb08d7449e43b1440.dll
Size

5.0MB
MD5

2e5a8ac5174219bcb08d7449e43b1440
SHA1

85b598ce3a40735b1dbb489decfae29ff2bcf319
SHA256

f83fb171610f8e38b41401f44c58d3448966fb5a15dedc04a8a015d6d6ac6767
SHA512

2a66da1f7ae9a007276499bbd025a760897a98a7a315225b555f89c63889e90e1f4415c4e434f5097c441d9d7cf1a6b61a24c03936a0f2b84b7ae4cc6f006eec

Score

10^/10

wannacry ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Executes dropped EXE 2 IoCs

Processes:

mssecsvr.exemssecsvr.exe

pid process

880 mssecsvr.exe
840 mssecsvr.exe

pid	process
880	mssecsvr.exe
840	mssecsvr.exe

Drops file in System32 directory 3 IoCs

Processes:

mssecsvr.exe

description	ioc	process
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\ARG0YTY2.txt	mssecsvr.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\Microsoft\Windows\Cookies\ARG0YTY2.txt	mssecsvr.exe

Drops file in Windows directory 2 IoCs

Processes:

rundll32.exemssecsvr.exe

description ioc process

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

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

Modifies data under HKEY_USERS 24 IoCs

Processes:

mssecsvr.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	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\UNCAsIntranet = "0"	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\Cookies\CachePrefix = "Cookie:"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a070043000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C88B0D75-95D7-40B2-89BD-4A3AD4DC11FD}\WpadNetworkName = "Network"	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\History\CachePrefix = "Visited:"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C88B0D75-95D7-40B2-89BD-4A3AD4DC11FD}\WpadDecisionReason = "1"	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
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C88B0D75-95D7-40B2-89BD-4A3AD4DC11FD}\WpadDecisionTime = 30eaa82ec4dbd601	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\32-e2-17-db-d2-77\WpadDecisionReason = "1"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\32-e2-17-db-d2-77\WpadDecisionTime = 30eaa82ec4dbd601	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\32-e2-17-db-d2-77\WpadDecision = "0"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C88B0D75-95D7-40B2-89BD-4A3AD4DC11FD}	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C88B0D75-95D7-40B2-89BD-4A3AD4DC11FD}\WpadDecision = "0"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\32-e2-17-db-d2-77	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C88B0D75-95D7-40B2-89BD-4A3AD4DC11FD}\32-e2-17-db-d2-77	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1088 wrote to memory of 1532	1088	rundll32.exe	rundll32.exe
PID 1088 wrote to memory of 1532	1088	rundll32.exe	rundll32.exe
PID 1088 wrote to memory of 1532	1088	rundll32.exe	rundll32.exe
PID 1088 wrote to memory of 1532	1088	rundll32.exe	rundll32.exe
PID 1088 wrote to memory of 1532	1088	rundll32.exe	rundll32.exe
PID 1088 wrote to memory of 1532	1088	rundll32.exe	rundll32.exe
PID 1088 wrote to memory of 1532	1088	rundll32.exe	rundll32.exe
PID 1532 wrote to memory of 880	1532	rundll32.exe	mssecsvr.exe
PID 1532 wrote to memory of 880	1532	rundll32.exe	mssecsvr.exe
PID 1532 wrote to memory of 880	1532	rundll32.exe	mssecsvr.exe
PID 1532 wrote to memory of 880	1532	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\WannaCry\Trojan-Ransom.Win32.Wanna.m.2e5a8ac5174219bcb08d7449e43b1440.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1088

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\WannaCry\Trojan-Ransom.Win32.Wanna.m.2e5a8ac5174219bcb08d7449e43b1440.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1532

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:880

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:840

Network

MITRE ATT&CK Matrix

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Downloads

C:\WINDOWS\mssecsvr.exe
MD5
d455da7d9475478569d33d949280b1d2

SHA1
a975bcd61e24ac8fd88b3624421e78ccb4ad385f

SHA256
9cf43d2ea01822063f18304562769a3bd07bebbebdeeac58b3d4792690a576c5

SHA512
0131a37f487f404d6754d77816a903ed5e032ffbbf682ec9d9856065c16a73b505f044806df6b0e79cc2c64da3472f7419e429d6b1673d236c40a63a51f99bec

Download Submit
C:\Windows\mssecsvr.exe
MD5
d455da7d9475478569d33d949280b1d2

SHA1
a975bcd61e24ac8fd88b3624421e78ccb4ad385f

SHA256
9cf43d2ea01822063f18304562769a3bd07bebbebdeeac58b3d4792690a576c5

SHA512
0131a37f487f404d6754d77816a903ed5e032ffbbf682ec9d9856065c16a73b505f044806df6b0e79cc2c64da3472f7419e429d6b1673d236c40a63a51f99bec

Download Submit
C:\Windows\mssecsvr.exe
MD5
d455da7d9475478569d33d949280b1d2

SHA1
a975bcd61e24ac8fd88b3624421e78ccb4ad385f

SHA256
9cf43d2ea01822063f18304562769a3bd07bebbebdeeac58b3d4792690a576c5

SHA512
0131a37f487f404d6754d77816a903ed5e032ffbbf682ec9d9856065c16a73b505f044806df6b0e79cc2c64da3472f7419e429d6b1673d236c40a63a51f99bec

Download Submit
memory/880-3-0x0000000000000000-mapping.dmp

Download
memory/1532-2-0x0000000000000000-mapping.dmp

Download
memory/1744-5-0x000007FEF7EB0000-0x000007FEF812A000-memory.dmp

Filesize
2.5MB

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