ec74faf149f1d56bbf825e6d7868f96c5fbdba22ab9bd7767113fbefc8abdc80

Analysis

max time kernel
153s
max time network
175s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
27-01-2024 11:35

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General

Target

2024-01-27_8c3f82e727e434aba5baf0c8fe603ea9_cryptolocker.exe
Size

131KB
MD5

8c3f82e727e434aba5baf0c8fe603ea9
SHA1

cebbb33f0101190e3b77c16fefd438a7b00eab40
SHA256

ec74faf149f1d56bbf825e6d7868f96c5fbdba22ab9bd7767113fbefc8abdc80
SHA512

5135d1371886094d2e374ed8f351dd65d4e3ff671196ddd59a95d5b9381bb835bd0262f4ad2499382d9837eeb435c87e3ca8bf7b070ff2d897204cc297c9b668
SSDEEP

1536:V6QFElP6n+gMQMOtEvwDpjQGYQbxGYQbxGYQbD:V6a+pOtEvwDpjt22H

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0009000000022480-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x0009000000022480-12.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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-01-27_8c3f82e727e434aba5baf0c8fe603ea9_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3776	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 4492 wrote to memory of 3776	4492	2024-01-27_8c3f82e727e434aba5baf0c8fe603ea9_cryptolocker.exe	89
PID 4492 wrote to memory of 3776	4492	2024-01-27_8c3f82e727e434aba5baf0c8fe603ea9_cryptolocker.exe	89
PID 4492 wrote to memory of 3776	4492	2024-01-27_8c3f82e727e434aba5baf0c8fe603ea9_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-01-27_8c3f82e727e434aba5baf0c8fe603ea9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-27_8c3f82e727e434aba5baf0c8fe603ea9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4492
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3776

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
131KB

MD5
bfb0ea625a759efe87c607aec0e7eef1

SHA1
464aef3b90abce18b2ff44047e70e7ff64c4b462

SHA256
fba87bb057883631c168680f741712638dadbb5acc9bb433b7b939ef03ed81b2

SHA512
12cb4aab0560a2a72fd8a611624fdc633dd9e7b31896801024c04e0938287157c59f68022fe998abd9527be4bfa2a4bf25a6bf8a2116feb382622229efa7c436

Download Submit
memory/3776-18-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/3776-17-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/4492-0-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4492-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4492-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download