213df90556135d18175352758ea6f343d6b7704f186f69b79de22cb149525535

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
11-05-2024 04:32

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General

Target

2024-05-11_2de2019d3d7805cf528f5565a811a4f6_cryptolocker.exe
Size

51KB
MD5

2de2019d3d7805cf528f5565a811a4f6
SHA1

63e44427207e758473af6076fd04730b4a812f6c
SHA256

213df90556135d18175352758ea6f343d6b7704f186f69b79de22cb149525535
SHA512

64725f6b88052cf4c5e8c40be9760b1d136a53e2a2c056c39b427bda66ac1363efbd5fae39420875d0ea8d830a7e92c245fc4abffa6c403ceab06ec2de170bad
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtO1:bODOw9acifAoc+vi

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1524-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000a0000000233c0-13.dat	CryptoLocker_rule2
behavioral2/memory/1524-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4160-18-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4160-27-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1524-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/files/0x000a0000000233c0-13.dat	UPX
behavioral2/memory/1524-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/4160-18-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/4160-27-0x0000000008000000-0x000000000800F000-memory.dmp	UPX

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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-11_2de2019d3d7805cf528f5565a811a4f6_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4160	lossy.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/1524-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/files/0x000a0000000233c0-13.dat	upx
behavioral2/memory/1524-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/4160-18-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/4160-27-0x0000000008000000-0x000000000800F000-memory.dmp	upx

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 1524 wrote to memory of 4160	1524	2024-05-11_2de2019d3d7805cf528f5565a811a4f6_cryptolocker.exe	82
PID 1524 wrote to memory of 4160	1524	2024-05-11_2de2019d3d7805cf528f5565a811a4f6_cryptolocker.exe	82
PID 1524 wrote to memory of 4160	1524	2024-05-11_2de2019d3d7805cf528f5565a811a4f6_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-11_2de2019d3d7805cf528f5565a811a4f6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-11_2de2019d3d7805cf528f5565a811a4f6_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1524
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:4160

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
51KB

MD5
db6b3255b42519d2bd0aa8ccf8d02cb2

SHA1
66f5ad0179c0c202588e2ac1fb4fdc68d99f70c6

SHA256
07aeae0b95a34000b410bcecdedfbbf04652602df2c427cf76d410de12b1ee90

SHA512
e40232868f9cd12a28abb81dd287828dc03580baa374ed71907b8468b3f62be30670dc1940f64d1a6dba62a36a2f42849757d533a0e1f37efd2e9eed0eb1ee1f

Download Submit
memory/1524-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/1524-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1524-2-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/1524-9-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1524-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/4160-18-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/4160-20-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/4160-26-0x00000000020C0000-0x00000000020C6000-memory.dmp

Filesize
24KB

Download
memory/4160-27-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download