wannacry | b825f05ca316b65aa51b03070d1f31c2c5ed03cf950efdb16e7e75535bed6124

General

Target

a7879a2d28a2827c01d284d0ed5e20c8.dll
Size

5.0MB
MD5

a7879a2d28a2827c01d284d0ed5e20c8
SHA1

1c0e2df2d4712b8f3cdaca632cf885dd658bc703
SHA256

b825f05ca316b65aa51b03070d1f31c2c5ed03cf950efdb16e7e75535bed6124
SHA512

d1955dd00a443e2c6bf24ac5e740ea460f0d4df848cffe8a5d121ff741c82d88c5d9030e6f16135b4ce30d50f5b12e1d0f6b1120438967a344d7eddfe637c8ae

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1265) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Scanning
T1046
Executes dropped EXE 2 IoCs

Processes:

mssecsvr.exemssecsvr.exe

pid process

1656 mssecsvr.exe
592 mssecsvr.exe

pid	process
1656	mssecsvr.exe
592	mssecsvr.exe

Drops file in System32 directory 1 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

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 (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 (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\ca-fd-da-49-6e-f8\WpadDecisionReason = "1"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	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\AutoDetect = "1"	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{121F6D94-F911-403A-AC73-5AA3B2D1DAE0}	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{121F6D94-F911-403A-AC73-5AA3B2D1DAE0}\WpadDecisionTime = 60ea7cb4ef9bd801	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{121F6D94-F911-403A-AC73-5AA3B2D1DAE0}\WpadNetworkName = "Network 3"	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\ProxyEnable = "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
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00c9000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\ca-fd-da-49-6e-f8	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{121F6D94-F911-403A-AC73-5AA3B2D1DAE0}\ca-fd-da-49-6e-f8	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\ca-fd-da-49-6e-f8\WpadDecisionTime = 60ea7cb4ef9bd801	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{121F6D94-F911-403A-AC73-5AA3B2D1DAE0}\WpadDecisionReason = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{121F6D94-F911-403A-AC73-5AA3B2D1DAE0}\WpadDecision = "0"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\ca-fd-da-49-6e-f8\WpadDecision = "0"	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1928 wrote to memory of 1904	1928	rundll32.exe	rundll32.exe
PID 1928 wrote to memory of 1904	1928	rundll32.exe	rundll32.exe
PID 1928 wrote to memory of 1904	1928	rundll32.exe	rundll32.exe
PID 1928 wrote to memory of 1904	1928	rundll32.exe	rundll32.exe
PID 1928 wrote to memory of 1904	1928	rundll32.exe	rundll32.exe
PID 1928 wrote to memory of 1904	1928	rundll32.exe	rundll32.exe
PID 1928 wrote to memory of 1904	1928	rundll32.exe	rundll32.exe
PID 1904 wrote to memory of 1656	1904	rundll32.exe	mssecsvr.exe
PID 1904 wrote to memory of 1656	1904	rundll32.exe	mssecsvr.exe
PID 1904 wrote to memory of 1656	1904	rundll32.exe	mssecsvr.exe
PID 1904 wrote to memory of 1656	1904	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a7879a2d28a2827c01d284d0ed5e20c8.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1928

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a7879a2d28a2827c01d284d0ed5e20c8.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1904

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1656

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:592

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Scanning

1

T1046

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\WINDOWS\mssecsvr.exe
Filesize
2.2MB

MD5
8e769fcd7957b264fc70ed25a83b8862

SHA1
015c7b01dfe62964385cbe850ded325f70cff7fd

SHA256
089c3146d7d3bf2317e348a03684aa52ce0d2fab03060655c954e676be1ad2b1

SHA512
0097b8252fe341fa1cff8027f9d22f5315c6edb0163d7ef5f7c718f7804dcfefd62609928b25c9b64c9f9a773642b11e821d1162dc4486b31f46e4b33e46fe73

Download Submit
C:\Windows\mssecsvr.exe
Filesize
2.2MB

MD5
8e769fcd7957b264fc70ed25a83b8862

SHA1
015c7b01dfe62964385cbe850ded325f70cff7fd

SHA256
089c3146d7d3bf2317e348a03684aa52ce0d2fab03060655c954e676be1ad2b1

SHA512
0097b8252fe341fa1cff8027f9d22f5315c6edb0163d7ef5f7c718f7804dcfefd62609928b25c9b64c9f9a773642b11e821d1162dc4486b31f46e4b33e46fe73

Download Submit
C:\Windows\mssecsvr.exe
Filesize
2.2MB

MD5
8e769fcd7957b264fc70ed25a83b8862

SHA1
015c7b01dfe62964385cbe850ded325f70cff7fd

SHA256
089c3146d7d3bf2317e348a03684aa52ce0d2fab03060655c954e676be1ad2b1

SHA512
0097b8252fe341fa1cff8027f9d22f5315c6edb0163d7ef5f7c718f7804dcfefd62609928b25c9b64c9f9a773642b11e821d1162dc4486b31f46e4b33e46fe73

Download Submit
memory/1656-56-0x0000000000000000-mapping.dmp

Download
memory/1904-54-0x0000000000000000-mapping.dmp

Download
memory/1904-55-0x00000000768F1000-0x00000000768F3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads