a86c4767fc1c49b6fb7bc1aec8cac3998277dc4cfc47190ab271568d05942a13

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
19-02-2024 04:51

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General

Target

2024-02-19_738868e4fd67be4c00698bdf9b4983bd_cryptolocker.exe
Size

54KB
MD5

738868e4fd67be4c00698bdf9b4983bd
SHA1

8eee0021374cfabb1efbc6925ebfbf354f66ac1b
SHA256

a86c4767fc1c49b6fb7bc1aec8cac3998277dc4cfc47190ab271568d05942a13
SHA512

1f9fd91153fa4aefd9649b82f3cce0f70e421afc4b4f5a02a686b86dc5552759ba9da459db63452897c9ac065ecb7b7586fb6df40f9a5bec07a8b8c4f90409e6
SSDEEP

1536:X6QFElP6n+gJBMOtEvwDpjBtE1yILJ0V3:X6a+BOtEvwDpjBOE

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000700000002320d-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x000700000002320d-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-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	2024-02-19_738868e4fd67be4c00698bdf9b4983bd_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2900	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 4600 wrote to memory of 2900	4600	2024-02-19_738868e4fd67be4c00698bdf9b4983bd_cryptolocker.exe	84
PID 4600 wrote to memory of 2900	4600	2024-02-19_738868e4fd67be4c00698bdf9b4983bd_cryptolocker.exe	84
PID 4600 wrote to memory of 2900	4600	2024-02-19_738868e4fd67be4c00698bdf9b4983bd_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-19_738868e4fd67be4c00698bdf9b4983bd_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-19_738868e4fd67be4c00698bdf9b4983bd_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4600
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2900

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
55KB

MD5
c58b47db2d43d34fe37463c48da4d2cb

SHA1
fce59744a15e8d77d98618da220bbd1f97dc8cf5

SHA256
c74124619a8c97a9eb2e3a059177b663fc23b9a000c75ee71635e5189bc9daf9

SHA512
710587aeb955932a3fd058d361411fa125242c76578cfa9edacada7b54fef3f45cbb8cc5ca27f9eb5d16f412dd882f5bcd78fa359f572c42dbf3fa2a586a1344

Download Submit
memory/2900-17-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/2900-19-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/4600-0-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/4600-1-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/4600-2-0x0000000000680000-0x0000000000686000-memory.dmp

Filesize
24KB

Download