wannacry | b449d6bc93e72b048050ac5ba066eaec553512b56c1f4873e53fa70660b85d96

Analysis

max time kernel
151s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
resource tags

arch:x64arch:x86image:win10v2004-20220414-enlocale:en-usos:windows10-2004-x64system
submitted
20-07-2022 01:34

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General

Target

4cc25b97bb799e0c360bead0b3691b1f.dll
Size

5.0MB
MD5

4cc25b97bb799e0c360bead0b3691b1f
SHA1

c731f3dd7dce8fd91b43222da11ec89241fcc804
SHA256

b449d6bc93e72b048050ac5ba066eaec553512b56c1f4873e53fa70660b85d96
SHA512

a34c49780f39a86dd7e1dc4532517d415a64d090e46912052df88fcf9365f095cffed343e4e9c84a2fa4c6333abfde208492fd0e5292a524a1e5a9425d599c90

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3333) 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 3 IoCs

Processes:

mssecsvc.exemssecsvc.exetasksche.exe

pid process

752 mssecsvc.exe
2540 mssecsvc.exe
4132 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 Scanning
T1046
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

pid	process
752	mssecsvc.exe
2540	mssecsvc.exe
4132	tasksche.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 5 IoCs

Processes:

mssecsvc.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 2496 wrote to memory of 4080	2496	rundll32.exe	rundll32.exe
PID 2496 wrote to memory of 4080	2496	rundll32.exe	rundll32.exe
PID 2496 wrote to memory of 4080	2496	rundll32.exe	rundll32.exe
PID 4080 wrote to memory of 752	4080	rundll32.exe	mssecsvc.exe
PID 4080 wrote to memory of 752	4080	rundll32.exe	mssecsvc.exe
PID 4080 wrote to memory of 752	4080	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\4cc25b97bb799e0c360bead0b3691b1f.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2496

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\4cc25b97bb799e0c360bead0b3691b1f.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4080

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:752

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:4132

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:2540

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Scanning

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\WINDOWS\mssecsvc.exe
Filesize
3.6MB

MD5
084db088c44555d4ccea92651f54cd8e

SHA1
b33e3326a90ccc8784e42e167832bb5e4df99bf4

SHA256
403df523df248c6e8a0f39db5194791a1e8bdcee1a41c038fee652b684287be4

SHA512
74bdb19b9b0ed1bc2cf1cfd9a5644ef02a778f353843b522393c3b111b5ba80884065181f2e5e25c310c4110d726d37e3cb09a5d164bb3202c3e55f5b09d3559

Download Submit
C:\Windows\mssecsvc.exe
Filesize
3.6MB

MD5
084db088c44555d4ccea92651f54cd8e

SHA1
b33e3326a90ccc8784e42e167832bb5e4df99bf4

SHA256
403df523df248c6e8a0f39db5194791a1e8bdcee1a41c038fee652b684287be4

SHA512
74bdb19b9b0ed1bc2cf1cfd9a5644ef02a778f353843b522393c3b111b5ba80884065181f2e5e25c310c4110d726d37e3cb09a5d164bb3202c3e55f5b09d3559

Download Submit
C:\Windows\mssecsvc.exe
Filesize
3.6MB

MD5
084db088c44555d4ccea92651f54cd8e

SHA1
b33e3326a90ccc8784e42e167832bb5e4df99bf4

SHA256
403df523df248c6e8a0f39db5194791a1e8bdcee1a41c038fee652b684287be4

SHA512
74bdb19b9b0ed1bc2cf1cfd9a5644ef02a778f353843b522393c3b111b5ba80884065181f2e5e25c310c4110d726d37e3cb09a5d164bb3202c3e55f5b09d3559

Download Submit
C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
ca73ed13ce5d8f9b98eafe046d5b2def

SHA1
be99e6616e5edd99f7886cd4f89a62f39c3b1e42

SHA256
eabb80333df9e51a08be9422133f02592ead62fd677963a7e0ab00aaf56dfc98

SHA512
18cfa57c894cf8dfb27d96655953c84133ba5ac755625157592644dd16d9476be458a51f61018b1a1485092b1f4ad9365cb2fb9ccc5a38f0324a1c568a7f31d4

Download Submit
memory/752-131-0x0000000000000000-mapping.dmp

Download
memory/4080-130-0x0000000000000000-mapping.dmp

Download