a2457945df98b09187fb11a5e5d279d42c65d66f3fed35e2f6e066cb08c4312e

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
17/04/2024, 04:01

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General

Target

2024-04-17_9c9aa3cad9f40308b97931e2c7c2ef9d_cryptolocker.exe
Size

39KB
MD5

9c9aa3cad9f40308b97931e2c7c2ef9d
SHA1

688c019df2aa1cec1b80c8d7421b7052d1948697
SHA256

a2457945df98b09187fb11a5e5d279d42c65d66f3fed35e2f6e066cb08c4312e
SHA512

67f2090d10df3d7696d0a8dc6612d1192c86114b52075ce93d5bcdd3ff2110edfb4254fe8684f5715c00b21f333092326db5c0140f7536a6500e8eda95df830c
SSDEEP

768:wHGGaSawqnwjRQ6ESlmFOsPoOdQtOOtEvwDpjm6WaJIOc+UPPEkLpb:YGzl5wjRQBBOsP1QMOtEvwDpjgarrkLF

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4392-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000001db0e-13.dat	CryptoLocker_rule2
behavioral2/memory/4392-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/544-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4392-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000001db0e-13.dat	CryptoLocker_set1
behavioral2/memory/4392-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/544-17-0x0000000000500000-0x000000000050B000-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-1-5-21-1132431369-515282257-1998160155-1000\Control Panel\International\Geo\Nation	2024-04-17_9c9aa3cad9f40308b97931e2c7c2ef9d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
544	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 4392 wrote to memory of 544	4392	2024-04-17_9c9aa3cad9f40308b97931e2c7c2ef9d_cryptolocker.exe	86
PID 4392 wrote to memory of 544	4392	2024-04-17_9c9aa3cad9f40308b97931e2c7c2ef9d_cryptolocker.exe	86
PID 4392 wrote to memory of 544	4392	2024-04-17_9c9aa3cad9f40308b97931e2c7c2ef9d_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-17_9c9aa3cad9f40308b97931e2c7c2ef9d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-17_9c9aa3cad9f40308b97931e2c7c2ef9d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4392
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:544

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
892a320ddf41e5d674359f4febcb39cb

SHA1
170eda874ea11c6f969d27436d69c00155074aea

SHA256
bd282d697a1e65bae606e7b432387908f890970972aa6fac450225cc1d2ff0fb

SHA512
7899cfea7ea649d3cc3aa2344a29c5f78cc4641a31c1043bf9cffb7aebc5d5ada0b7c5d30f82cd558d30e7894e85463950320fa5cf88c37ada65e9d6aa402d18

Download Submit
memory/544-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/544-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/544-23-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4392-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4392-1-0x0000000002310000-0x0000000002316000-memory.dmp

Filesize
24KB

Download
memory/4392-2-0x0000000002310000-0x0000000002316000-memory.dmp

Filesize
24KB

Download
memory/4392-3-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download
memory/4392-18-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download