wannacry | b825f05ca316b65aa51b03070d1f31c2c5ed03cf950efdb16e7e75535bed6124

Analysis

max time kernel
165s
max time network
168s
platform
windows10-2004_x64
resource
win10v2004-20220718-en
resource tags

arch:x64arch:x86image:win10v2004-20220718-enlocale:en-usos:windows10-2004-x64system
submitted
20-07-2022 02:17

Target

a7879a2d28a2827c01d284d0ed5e20c8.dll
Size

5.0MB
MD5

a7879a2d28a2827c01d284d0ed5e20c8
SHA1

1c0e2df2d4712b8f3cdaca632cf885dd658bc703
SHA256

b825f05ca316b65aa51b03070d1f31c2c5ed03cf950efdb16e7e75535bed6124
SHA512

d1955dd00a443e2c6bf24ac5e740ea460f0d4df848cffe8a5d121ff741c82d88c5d9030e6f16135b4ce30d50f5b12e1d0f6b1120438967a344d7eddfe637c8ae

Score

10^/10

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (2645) 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

408 mssecsvr.exe
1040 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

pid	process
408	mssecsvr.exe
1040	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 5 IoCs

Processes:

mssecsvr.exe

description	ioc	process
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\ZoneMap\	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 (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	mssecsvr.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 3436 wrote to memory of 3420	3436	rundll32.exe	rundll32.exe
PID 3436 wrote to memory of 3420	3436	rundll32.exe	rundll32.exe
PID 3436 wrote to memory of 3420	3436	rundll32.exe	rundll32.exe
PID 3420 wrote to memory of 408	3420	rundll32.exe	mssecsvr.exe
PID 3420 wrote to memory of 408	3420	rundll32.exe	mssecsvr.exe
PID 3420 wrote to memory of 408	3420	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:3436

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Scanning

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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/408-131-0x0000000000000000-mapping.dmp

Download
memory/3420-130-0x0000000000000000-mapping.dmp

Download