c5198d1643d428896936f86064901bf30d680e550a78dcb2ec842bcf1d19cd9c

Analysis

max time kernel
141s
max time network
162s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
23-02-2024 13:00

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-02-23_d088375a7603f36952a0d89d1256f930_cryptolocker.exe
Size

66KB
MD5

d088375a7603f36952a0d89d1256f930
SHA1

04aaca814583159b258933ee9f9d2ba34e94fba0
SHA256

c5198d1643d428896936f86064901bf30d680e550a78dcb2ec842bcf1d19cd9c
SHA512

0912ee89f2bc6f82ff89d1bac72001d89d8e2fa8aa0cfafa32b902b6178c6fb47eea79e086b52b895a3407660a918372e7c6e20a2c64db8afb8cef2dc35cfc04
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjY6UncE:1nK6a+qdOOtEvwDpjA

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4792-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002310e-13.dat	CryptoLocker_rule2
behavioral2/memory/4792-21-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1496-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4792-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002310e-13.dat	CryptoLocker_set1
behavioral2/memory/4792-21-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/1496-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4792-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000700000002310e-13.dat	UPX
behavioral2/memory/4792-21-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/1496-26-0x0000000000500000-0x000000000050F311-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-1-5-21-3844919115-497234255-166257750-1000\Control Panel\International\Geo\Nation	2024-02-23_d088375a7603f36952a0d89d1256f930_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1496	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4792-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000700000002310e-13.dat	upx
behavioral2/memory/4792-21-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/1496-26-0x0000000000500000-0x000000000050F311-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 4792 wrote to memory of 1496	4792	2024-02-23_d088375a7603f36952a0d89d1256f930_cryptolocker.exe	86
PID 4792 wrote to memory of 1496	4792	2024-02-23_d088375a7603f36952a0d89d1256f930_cryptolocker.exe	86
PID 4792 wrote to memory of 1496	4792	2024-02-23_d088375a7603f36952a0d89d1256f930_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-02-23_d088375a7603f36952a0d89d1256f930_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-23_d088375a7603f36952a0d89d1256f930_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4792
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1496

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
66KB

MD5
29ad3b32242e0293e54ae9ef4f7887e7

SHA1
37a701a4a7e862d510b7a800297ff65c7196189e

SHA256
20a46f0d48e44d0789a0e0adad8099082db49db3d6d7f06e0d0c9b09f549e99b

SHA512
44498393a9404955ea1d1826030d406ddc5596548bc14065625a035927ff9562fc135b59e12960a5b2bb2a54b02087d859e0b5e842b58ff6ccfab517101ddc96

Download Submit
memory/1496-19-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1496-18-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1496-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4792-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4792-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4792-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4792-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4792-21-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download