71790fa985fd0806f9715f26925a536e6f38d07a112915c83a4ab08a411f9c7c

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28-02-2024 02:28

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General

Target

2024-02-28_1a7cc21338670b0457499a33b679eed4_cryptolocker.exe
Size

50KB
MD5

1a7cc21338670b0457499a33b679eed4
SHA1

e4bdceb64b39f5a0d9b2f9c9555ce3926450a7a1
SHA256

71790fa985fd0806f9715f26925a536e6f38d07a112915c83a4ab08a411f9c7c
SHA512

1269eadd9f312ec0bff7b680c71fc6de47948e8a867495a6fdb6e2f1948968a3449d64a1a7d79f78975d6397cb710f60b938ac01e77331484504367a98e296b8
SSDEEP

768:X6LsoEEeegiZPvEhHSG+gp/BtOOtEvwDpjBVaD3E09vxmlcaT3Os:X6QFElP6n+gJBMOtEvwDpjBtExmlt

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023205-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023205-12.dat	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-1-5-21-2727153400-192325109-1870347593-1000\Control Panel\International\Geo\Nation	2024-02-28_1a7cc21338670b0457499a33b679eed4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1624	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 4708 wrote to memory of 1624	4708	2024-02-28_1a7cc21338670b0457499a33b679eed4_cryptolocker.exe	90
PID 4708 wrote to memory of 1624	4708	2024-02-28_1a7cc21338670b0457499a33b679eed4_cryptolocker.exe	90
PID 4708 wrote to memory of 1624	4708	2024-02-28_1a7cc21338670b0457499a33b679eed4_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-02-28_1a7cc21338670b0457499a33b679eed4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-28_1a7cc21338670b0457499a33b679eed4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4708
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1624

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
50KB

MD5
22df689836f6840db33d74524909de78

SHA1
b9d239c02984b16da6a1ed844932501b7767492a

SHA256
9fe886119df6541761a40ab21f984b459b9515c8f2fe34b00be3107bc06ee914

SHA512
b435a5ec81050aded5e0fef9a1c099ffb37ae50b50c6569cc4908e1fcc16557724b8a15e097b41ec4e087d9ba1c3f8623cbae9a165178453b30807adce0fb400

Download Submit
memory/1624-18-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/1624-17-0x0000000001F40000-0x0000000001F46000-memory.dmp

Filesize
24KB

Download
memory/4708-0-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/4708-1-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/4708-2-0x0000000000690000-0x0000000000696000-memory.dmp

Filesize
24KB

Download