c1eb02f5ae27591cf35bc4d1a3fa1c1c5a2850ca322c0fbb6a761e17b01ce76c

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
21/04/2024, 04:43

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General

Target

2024-04-21_f1dcbe6a90fe3fd9e8ed08f72d50f09e_cryptolocker.exe
Size

39KB
MD5

f1dcbe6a90fe3fd9e8ed08f72d50f09e
SHA1

caacaefe77e2e10527e3f2d632a52a60295e08da
SHA256

c1eb02f5ae27591cf35bc4d1a3fa1c1c5a2850ca322c0fbb6a761e17b01ce76c
SHA512

61be6082a9d24482efef1e346f439d70a14d619363d92e3473a225af70a48c4766fcec563f26d13a910f51bc0e6c70dc3a5b718e649b2a0092dbd36f41cb6f7b
SSDEEP

768:wHGGaSawqnwjRQ6ESlmFOsPoOdQtOOtEvwDpjm6WaJIOc+UPPEkLNWR:YGzl5wjRQBBOsP1QMOtEvwDpjgarrkLA

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2312-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x001c00000001e97e-13.dat	CryptoLocker_rule2
behavioral2/memory/2312-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5052-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2312-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x001c00000001e97e-13.dat	CryptoLocker_set1
behavioral2/memory/2312-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5052-18-0x0000000000500000-0x000000000050B000-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-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation	2024-04-21_f1dcbe6a90fe3fd9e8ed08f72d50f09e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5052	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 2312 wrote to memory of 5052	2312	2024-04-21_f1dcbe6a90fe3fd9e8ed08f72d50f09e_cryptolocker.exe	87
PID 2312 wrote to memory of 5052	2312	2024-04-21_f1dcbe6a90fe3fd9e8ed08f72d50f09e_cryptolocker.exe	87
PID 2312 wrote to memory of 5052	2312	2024-04-21_f1dcbe6a90fe3fd9e8ed08f72d50f09e_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-04-21_f1dcbe6a90fe3fd9e8ed08f72d50f09e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-21_f1dcbe6a90fe3fd9e8ed08f72d50f09e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2312
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5052

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
39KB

MD5
23c66acb42540af84ca4eff7a0d0753f

SHA1
9aab876895787c39f9eb0ceb67615e100f38c270

SHA256
e1c433e7809baa5d304ba00da3463910e5485d7c3d409e65fafe3629d7d1b9f1

SHA512
a2af1a3fa048d5f677a0ce4b1af9d30283525494d31b758d9537a327e53a2960f77f89f83510aa6c3901242d06fd0384e403c09018e6ba8acf6f50ef6b1b8d3b

Download Submit
memory/2312-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/2312-1-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/2312-3-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2312-2-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/2312-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/5052-18-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download