606250304f55e21f0f3a4ed0d3d0807f2fca7fb84b296417787b216ff66e6742

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
25/06/2024, 22:23

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General

Target

2024-06-25_7b3150834ae0eb4b44dbafc9ffaa026d_cryptolocker.exe
Size

54KB
MD5

7b3150834ae0eb4b44dbafc9ffaa026d
SHA1

d084a4cda5efde844bb2734a6a7a4a75077c0256
SHA256

606250304f55e21f0f3a4ed0d3d0807f2fca7fb84b296417787b216ff66e6742
SHA512

5f3dc382449a257715034d8dfe1b3675ed84b3e490915bf916ea854a9e0e2b1aa759b2e1a97c2906da86df9ba27a1e7e90dab2a19b41ca0906c22bd1b1ec5223
SSDEEP

768:bco/2n1TCraU6GD1P2wZEjbhxnbcuyD7U9kXDn62tH/1/LpPFP5:b7/y28wZEjbnouy8G76iH/NLpz

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 2 IoCs

resource	yara_rule
behavioral2/memory/3100-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000022f51-13.dat	CryptoLocker_rule2

UPX dump on OEP (original entry point) 2 IoCs

resource	yara_rule
behavioral2/memory/3100-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x0008000000022f51-13.dat	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	2024-06-25_7b3150834ae0eb4b44dbafc9ffaa026d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3620	rewok.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3100-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x0008000000022f51-13.dat	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 3100 wrote to memory of 3620	3100	2024-06-25_7b3150834ae0eb4b44dbafc9ffaa026d_cryptolocker.exe	81
PID 3100 wrote to memory of 3620	3100	2024-06-25_7b3150834ae0eb4b44dbafc9ffaa026d_cryptolocker.exe	81
PID 3100 wrote to memory of 3620	3100	2024-06-25_7b3150834ae0eb4b44dbafc9ffaa026d_cryptolocker.exe	81

C:\Users\Admin\AppData\Local\Temp\2024-06-25_7b3150834ae0eb4b44dbafc9ffaa026d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-25_7b3150834ae0eb4b44dbafc9ffaa026d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3100
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  PID:3620

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
55KB

MD5
ae687314e7e12f5651088071ebfe1780

SHA1
c8ddda4ef712ab235c7b4763b1f9e4efa2c168ba

SHA256
edb2aa00c3ed2eb30b06b686b71b8b6ab22b9000b630542e47bfe386798fbfed

SHA512
f13226b17a8d7d206900722ae50e404d19ea96fa5ef79e91a1a43ddbdf376da5b08910647287349aa38a12e42b9243f5255546a620fe393a259068c7ad7f8c72

Download Submit
memory/3100-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/3100-1-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download
memory/3100-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3100-9-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download
memory/3620-26-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download