593f5def49c338e3c6d1a2324d56a1cd1bd3cae2859a97ee393f2e5073611e1d

Analysis

max time kernel
151s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
28-01-2024 20:26

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General

Target

2024-01-28_431d1d73d9b774ff91f5cef588f21d31_cryptolocker.exe
Size

56KB
MD5

431d1d73d9b774ff91f5cef588f21d31
SHA1

fa365b3ac145d6c13bda5026c0ff4fdda5f0a9e3
SHA256

593f5def49c338e3c6d1a2324d56a1cd1bd3cae2859a97ee393f2e5073611e1d
SHA512

93868532ddca645bbe12f07e47afd26ab1a6752467bfa7931f26b0b61a0b828f9b6735ab09af37053ed6bed14d41e317dd57200c60ad2094e1d151ee523c5d8e
SSDEEP

768:79inqyNR/QtOOtEvwDpjBK/iVTab3GRuv3VylsPxAf:79mqyNhQMOtEvwDpjBPY7xv3gy5I

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/4608-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023116-13.dat	CryptoLocker_rule2
behavioral2/memory/4608-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4608-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023116-13.dat	CryptoLocker_set1
behavioral2/memory/4608-25-0x0000000000500000-0x000000000050F000-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	2024-01-28_431d1d73d9b774ff91f5cef588f21d31_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2296	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 4608 wrote to memory of 2296	4608	2024-01-28_431d1d73d9b774ff91f5cef588f21d31_cryptolocker.exe	84
PID 4608 wrote to memory of 2296	4608	2024-01-28_431d1d73d9b774ff91f5cef588f21d31_cryptolocker.exe	84
PID 4608 wrote to memory of 2296	4608	2024-01-28_431d1d73d9b774ff91f5cef588f21d31_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-01-28_431d1d73d9b774ff91f5cef588f21d31_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-28_431d1d73d9b774ff91f5cef588f21d31_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4608
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2296

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
56KB

MD5
7aebcb31dc97d6253e126201264af09e

SHA1
c997322dbaf8990d0a17c34fea592819c456d5b7

SHA256
942291cc692717e71804453d5e47941e2b78463029cd881c888331841495c9aa

SHA512
e8499c6cbc5fd8b5996ad4558aa8d5f1b0b270b4655bb4f8a189dc4557cca59883e76df5a1f9fb8d9c2f74e212c467ed99371893942bbf6777d1fa0eb55d1144

Download Submit
memory/2296-18-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/2296-20-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4608-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4608-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4608-2-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4608-3-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/4608-25-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download