7f489d2497df9c681b7b7c27c3dda7a76397f29f421405907f0af938d7137c82

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
20/06/2024, 11:32

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General

Target

2024-06-20_d10c8b879c1b3da0b2e1208d9b0cacac_cryptolocker.exe
Size

54KB
MD5

d10c8b879c1b3da0b2e1208d9b0cacac
SHA1

83db4b15af402ba58cd9871ec4260e771673f479
SHA256

7f489d2497df9c681b7b7c27c3dda7a76397f29f421405907f0af938d7137c82
SHA512

0d955dc4f358f3aea241c18c2d59cc05241c527105a1d79f30a49445463d262f9e53d2ebaaca2716f261ab848f9a6b7651c63448e350ff140192e6c0aaa1b9cf
SSDEEP

768:bco/2n1TCraU6GD1P2wZEjbhxnbcuyD7U9kXDn62tH/1/LpPFPK:b7/y28wZEjbnouy8G76iH/NLpE

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/2228-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000600000002329a-13.dat	CryptoLocker_rule2
behavioral2/memory/1676-19-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral2/memory/2228-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x000600000002329a-13.dat	UPX
behavioral2/memory/1676-19-0x0000000000400000-0x000000000040E000-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-1-5-21-2447855248-390457009-3660902674-1000\Control Panel\International\Geo\Nation	2024-06-20_d10c8b879c1b3da0b2e1208d9b0cacac_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1676	rewok.exe

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/2228-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x000600000002329a-13.dat	upx
behavioral2/memory/1676-19-0x0000000000400000-0x000000000040E000-memory.dmp	upx

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 2228 wrote to memory of 1676	2228	2024-06-20_d10c8b879c1b3da0b2e1208d9b0cacac_cryptolocker.exe	83
PID 2228 wrote to memory of 1676	2228	2024-06-20_d10c8b879c1b3da0b2e1208d9b0cacac_cryptolocker.exe	83
PID 2228 wrote to memory of 1676	2228	2024-06-20_d10c8b879c1b3da0b2e1208d9b0cacac_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-06-20_d10c8b879c1b3da0b2e1208d9b0cacac_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-20_d10c8b879c1b3da0b2e1208d9b0cacac_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2228
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  PID:1676

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\rewok.exe

Filesize
54KB

MD5
86929a63fe708df9d2ad308fcc0f3920

SHA1
2c6fb20cea5edf9fa6e732580ee243c453a07913

SHA256
1a22901b8873065a8cd2f923bacaf23102a4ab846d1783dbbbf4dd25bdc759bb

SHA512
c2503af6b31ddc90c5ba8bbde790571d6ebc10e9bd4da7eafa4094593659d8ea48dfbb1b514895224de6016fe8b134e637986df10142aa0689fed01bf715ace6

Download Submit
memory/1676-19-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1676-27-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/2228-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2228-1-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/2228-9-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/2228-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download