99441ccf0c32adef155667ee4aedb8205401050227080efb4e3e29a1eb032f09

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 15:35

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General

Target

2024-05-21_4e3cff9b2034e5ef5cf9c26fd154b2a8_cryptolocker.exe
Size

54KB
MD5

4e3cff9b2034e5ef5cf9c26fd154b2a8
SHA1

5dc01509b4798b6408c4a9ccb5a0f9d287af5668
SHA256

99441ccf0c32adef155667ee4aedb8205401050227080efb4e3e29a1eb032f09
SHA512

924d68596098bf8119bc9c22c54ad36a723fdbf5b5e4bc7f3d5f7cb321b0ec54e04a46d567f35861013596c9abc5ce17467f88be4d4ac2c23c64d048d41ebe73
SSDEEP

768:bIDOw9UiaCHfjnE0Sfa7ilR0p9u6p4ICNBCXK9Xv+mb6uXsT:bIDOw9a0DwitDZzc16l

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023305-12.dat	CryptoLocker_rule2

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-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	2024-05-21_4e3cff9b2034e5ef5cf9c26fd154b2a8_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3972	lossy.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 4892 wrote to memory of 3972	4892	2024-05-21_4e3cff9b2034e5ef5cf9c26fd154b2a8_cryptolocker.exe	83
PID 4892 wrote to memory of 3972	4892	2024-05-21_4e3cff9b2034e5ef5cf9c26fd154b2a8_cryptolocker.exe	83
PID 4892 wrote to memory of 3972	4892	2024-05-21_4e3cff9b2034e5ef5cf9c26fd154b2a8_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-21_4e3cff9b2034e5ef5cf9c26fd154b2a8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_4e3cff9b2034e5ef5cf9c26fd154b2a8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4892
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:3972

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\lossy.exe

Filesize
55KB

MD5
e4f36d066989c5e79c64d48f8a84186c

SHA1
ae4cde8b878a6da60a6347872922d75e73d0f0ec

SHA256
657359bad77bd07308fb4459d3d413b8f63c8742221718f76eab3f2a24280248

SHA512
8974f2558dca264c5ef1bcec8db13dca028b42dc08e3a647304ea0844008868e895f4b109507c2eb06610a1f71971fdd2f309a3a7b3e4b2fea77ac7b0620ff3e

Download Submit
memory/3972-17-0x0000000001F60000-0x0000000001F66000-memory.dmp

Filesize
24KB

Download
memory/3972-23-0x0000000001F40000-0x0000000001F46000-memory.dmp

Filesize
24KB

Download
memory/4892-0-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/4892-1-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/4892-2-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download