f503ee8316a73b68665fd3b6ea59f5c18d54d3bcfba8f5ec3f5168605893a192

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
20/05/2024, 15:09

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General

Target

2024-05-20_ac4ff2f71e606de7247f4ade3503244f_cryptolocker.exe
Size

46KB
MD5

ac4ff2f71e606de7247f4ade3503244f
SHA1

40063d8f41c638255596cfe68257554c218f424d
SHA256

f503ee8316a73b68665fd3b6ea59f5c18d54d3bcfba8f5ec3f5168605893a192
SHA512

6b933eb1183483034ce773fcf3fb3da819a427dc545940500e7a03734d5735e9ce2312de29bb5e2ab232c2b68964c8cc40ff012647a81c6bd9cab9368cc55bfd
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MoL8:qmbhXDmjr5MOtEvwDpj5cDtKkQZQy

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3336-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000022f51-13.dat	CryptoLocker_rule2
behavioral2/memory/3336-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4792-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4792-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/3336-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4792-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4792-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3336-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000022f51-13.dat	UPX
behavioral2/memory/3336-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4792-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4792-28-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-20_ac4ff2f71e606de7247f4ade3503244f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4792	asih.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3336 wrote to memory of 4792	3336	2024-05-20_ac4ff2f71e606de7247f4ade3503244f_cryptolocker.exe	83
PID 3336 wrote to memory of 4792	3336	2024-05-20_ac4ff2f71e606de7247f4ade3503244f_cryptolocker.exe	83
PID 3336 wrote to memory of 4792	3336	2024-05-20_ac4ff2f71e606de7247f4ade3503244f_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-20_ac4ff2f71e606de7247f4ade3503244f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-20_ac4ff2f71e606de7247f4ade3503244f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3336
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4792

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
46KB

MD5
572cbc22b969b50898bdb5275297b837

SHA1
07967217e717797389c6a1c31d7cf49310fb92a2

SHA256
31ce50292eec97f906ea4a8248081c40fa1f74d4aa4cc09deeee31164fc6c7f3

SHA512
70ff067c69a7e754926d54dbf9655830ae58164253114d20fdc6b9a5dd6f493c8215565c13c242fd8526999bd2bedd6ebfaee4704bf42c1add320a544b158d89

Download Submit
memory/3336-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3336-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3336-2-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/3336-8-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3336-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4792-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4792-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4792-27-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4792-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download