57791ed234d7b3e1e39ffa9408c775018d750d2b0db45fc688b21710498ba176

Analysis

max time kernel
134s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
17/02/2024, 20:45

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General

Target

2024-02-17_cd80cd90ea5ec2e8bc19304ef9e90738_cryptolocker.exe
Size

35KB
MD5

cd80cd90ea5ec2e8bc19304ef9e90738
SHA1

c4396ab3c30429b417e9fa7524ed3cf5bd208b13
SHA256

57791ed234d7b3e1e39ffa9408c775018d750d2b0db45fc688b21710498ba176
SHA512

8f41ba70c8d128cd91ddd36905e296dc62de1e6c6d7cc0f2f81b51e2b64d4eb0be758bd85b39b7bdb0ecbc42cb9df19252f8c2f8fd2e5968d28f08fe7441bca1
SSDEEP

768:wHGGaSawqnwjRQ6ESlmFOsPoOdQtOOtEvwDpjm6WaJIOc+UPPEkLK:YGzl5wjRQBBOsP1QMOtEvwDpjgarrkLK

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/3236-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002311a-13.dat	CryptoLocker_rule2
behavioral2/memory/3236-19-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/3236-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002311a-13.dat	CryptoLocker_set1
behavioral2/memory/3236-19-0x0000000000500000-0x000000000050B000-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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-02-17_cd80cd90ea5ec2e8bc19304ef9e90738_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4332	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 3236 wrote to memory of 4332	3236	2024-02-17_cd80cd90ea5ec2e8bc19304ef9e90738_cryptolocker.exe	83
PID 3236 wrote to memory of 4332	3236	2024-02-17_cd80cd90ea5ec2e8bc19304ef9e90738_cryptolocker.exe	83
PID 3236 wrote to memory of 4332	3236	2024-02-17_cd80cd90ea5ec2e8bc19304ef9e90738_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-02-17_cd80cd90ea5ec2e8bc19304ef9e90738_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-17_cd80cd90ea5ec2e8bc19304ef9e90738_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3236
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4332

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
35KB

MD5
1ef6f71edb662c29f50c4809d4c133d7

SHA1
fe9be09f3fb120e56581da277ddbdc04dba3f6f9

SHA256
8e2be2421cb4a6d34059819e973f9cba5fcd15017f0ed7927cb39b9180619325

SHA512
033bc4f2a5a1ed6632c03fb27b751799642c90022ee93ff5e981b56b786414dca65882e1c04c8797b5454116f58da387d01375e01da9423660310dc209c1ecc8

Download Submit
memory/3236-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/3236-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3236-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3236-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/3236-19-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4332-20-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4332-18-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download