78f3f4f89f5e07c291e055073ae2b8d9581e626d555c3bef1bfac6f2b8075e02

Analysis

max time kernel
148s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
28-05-2024 07:36

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General

Target

2024-05-28_fc32be17fa57cc7945da64985653abe1_cryptolocker.exe
Size

52KB
MD5

fc32be17fa57cc7945da64985653abe1
SHA1

f5fa1790e4be63d90e09f7ceb27c22984ac4c883
SHA256

78f3f4f89f5e07c291e055073ae2b8d9581e626d555c3bef1bfac6f2b8075e02
SHA512

31bb5d9b08de69ab6a0ee9917cab75c7259a54bcb9b5a4786cf95662100e9d31db7cb6a6a5c4f61acbbc4a83da50178ccbd3e26e3482d4aefa6e42148e9cc0e1
SSDEEP

768:79inqyNR/QtOOtEvwDpjBK/rJ+Nw8qnTHGfil:79mqyNhQMOtEvwDpjBxe8GGfk

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/4200-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000022f51-13.dat	CryptoLocker_rule2
behavioral2/memory/4200-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4200-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000022f51-13.dat	CryptoLocker_set1
behavioral2/memory/4200-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

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	2024-05-28_fc32be17fa57cc7945da64985653abe1_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2916	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 4200 wrote to memory of 2916	4200	2024-05-28_fc32be17fa57cc7945da64985653abe1_cryptolocker.exe	83
PID 4200 wrote to memory of 2916	4200	2024-05-28_fc32be17fa57cc7945da64985653abe1_cryptolocker.exe	83
PID 4200 wrote to memory of 2916	4200	2024-05-28_fc32be17fa57cc7945da64985653abe1_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-28_fc32be17fa57cc7945da64985653abe1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-28_fc32be17fa57cc7945da64985653abe1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4200
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2916

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
52KB

MD5
71a5d67b6a815cbb52c605430549f691

SHA1
9c5158cfb458bcc69aa056a9a0bf8deed274ce22

SHA256
54b2039afdf5cfb212ae863c3a71c9a01f2dec554106494106296a3f116db61a

SHA512
91dbc1e34c3db619e05c39ba29bb2317bcdf51abb809a1db878b545eeb4f25b66ecf0ac73e10e28d622affd0c6555c30f4f0fe34f0757b69f38168f6c9891302

Download Submit
memory/4200-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4200-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4200-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4200-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4200-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download