8bfacf5f5c696ce90ce7113e9d979e7039848c4109129d3a0549dca572e69ba4

Analysis

max time kernel
141s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
09/05/2024, 22:08

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General

Target

2024-05-09_a04830860f275c670482dc20b64603fd_cryptolocker.exe
Size

65KB
MD5

a04830860f275c670482dc20b64603fd
SHA1

ec87f455e0a5e5f5aaf005a193c231f83d04e66f
SHA256

8bfacf5f5c696ce90ce7113e9d979e7039848c4109129d3a0549dca572e69ba4
SHA512

e2bd4ca3d53a2e460a4cbe2d08eeefb82335e8caee9ee1510394bba02da0f1a85e614bb09387964487b218fbba21a3cd020727f1a56107846df3d2abc5ce65a5
SSDEEP

1536:o1KhxqwtdgI2MyzNORQtOflIwoHNV2XBFV72BOlA7ZszudnYTjipvF293Cid:aq7tdgI2MyzNORQtOflIwoHNV2XBFV7f

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000900000002342a-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x000900000002342a-12.dat	CryptoLocker_set1

Checks computer location settings 2 TTPs 2 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-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation	2024-05-09_a04830860f275c670482dc20b64603fd_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation	hurok.exe

Executes dropped EXE 1 IoCs

pid	Process
4380	hurok.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 3100 wrote to memory of 4380	3100	2024-05-09_a04830860f275c670482dc20b64603fd_cryptolocker.exe	83
PID 3100 wrote to memory of 4380	3100	2024-05-09_a04830860f275c670482dc20b64603fd_cryptolocker.exe	83
PID 3100 wrote to memory of 4380	3100	2024-05-09_a04830860f275c670482dc20b64603fd_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-09_a04830860f275c670482dc20b64603fd_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-09_a04830860f275c670482dc20b64603fd_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3100
- C:\Users\Admin\AppData\Local\Temp\hurok.exe
  "C:\Users\Admin\AppData\Local\Temp\hurok.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  PID:4380

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\hurok.exe

Filesize
65KB

MD5
d8d57bea56c0024e5e7f4b3ca6a4020b

SHA1
5bbc651b3704aaf5532228836d7adc6e3943cdb1

SHA256
b6639d957276847ce06642e5e3b32981f6857383694b1485d0de42bc32c4c2e0

SHA512
4964cd170c5320646845a68c58fe178247f43f0351a2a8b223dcf3f47ed9c737a989e9f52f2c1889a732495e025bee3c4ecd701ad67c08e33bf159a35a2c6636

Download Submit
memory/3100-0-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3100-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3100-8-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download