wannacry | db3cd4b0fb816bd104fc9587d35572450d9a8d1c53876cb9ee9ce26e4469b792

General

Target
2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe
Size 2.2MB
Sample240527-efs2ssgc37
SHA256 db3cd4b0fb816bd104fc9587d35572450d9a8d1c53876cb9ee9ce26e4469b792
MD5 733c208c721a3a88b239d265bc93b53a
SHA1 a948853377a4333f153b57f4ad5d734c89ae49f4
SHA512 93e7c2a7be77b3f23b6018ed958b23eb98d1ad03dc83fcae5bbb1cdc03a031896fa4e696e388542c8dba229311e95f7ab5fa94c6287ac31a63565f053c755937
SSDEEP 49152:QnpEKUv9wC7+VQej/1INRx+TSqTdX1HkQo6SAzRdhnv/:Qpyv+Fhz1aRxcSUDk36SANdhv/
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3214) 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 1 IoCs

pid	Process
4336	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 Discovery
T1046

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5	2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE	2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies	2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5	2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\WINDOWS\tasksche.exe	2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe
File created	C:\Windows\__tmp_rar_sfx_access_check_240605750	tasksche.exe
File created	C:\Windows\eee.exe	tasksche.exe

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P	2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft	2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows	2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion	2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe
Key created	\REGISTRY\USER\.DEFAULT\Software	2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P\History	2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3328 wrote to memory of 4336	3328	2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe	86
PID 3328 wrote to memory of 4336	3328	2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe	86
PID 3328 wrote to memory of 4336	3328	2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe"
1⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:3328
- C:\WINDOWS\tasksche.exe
  C:\WINDOWS\tasksche.exe /i
  2⤵
  - Executes dropped EXE
  - Drops file in Windows directory
  PID:4336

C:\Users\Admin\AppData\Local\Temp\2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe
C:\Users\Admin\AppData\Local\Temp\2024-05-27_733c208c721a3a88b239d265bc93b53a_wannacry.exe -m security
1⤵
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:4232

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

2

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

tasksche.exe

Path C:\Windows\tasksche.exe
Size 2.0MB
SHA256 ff69e5bf957beb433910685d17988d4c73ba220b4674633f01f1b1cf4d871a0e
MD5 3a0460fd26b0ce9f91dbaa853e95d071
SHA1 dc4eb8f619c53b6b8b10d027b2e4017214612c33
SHA512 bc382f269ae670b5936382adb27828d439c04832e3d080c3ff696f6c204dfe9f360d1ab1fad145d2db3e627ce1a70676fd6875d056ce0389d97634e53028b311
SSDEEP 49152:XEKUv9wC7+VQej/1INRx+TSqTdX1HkQo6SAzRdhnvm:Xyv+Fhz1aRxcSUDk36SANdhvm
MD5 SHA1 SHA512 SSDEEP

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