559fbdc29c5fffcf6338aaf976e6edbf10616fb68ca1d00ca2eecf93cdb33823

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
25/05/2024, 21:03

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-05-25_97a294ca200e4168a8a6e46732ab223c_cryptolocker.exe
Size

64KB
MD5

97a294ca200e4168a8a6e46732ab223c
SHA1

440be7d2edc7cb66d45df2869543300c2b45bf2b
SHA256

559fbdc29c5fffcf6338aaf976e6edbf10616fb68ca1d00ca2eecf93cdb33823
SHA512

dcf01ffed88b9bd571225aca55a916498545643506edb7021d08adb622709a6b88b1d34ce6fe057d0f88674ed26f585d1995cab093dec1fbd126bc0999a40e69
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsiZ:BbdDmjr+OtEvwDpjM8g

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3852-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000a0000000233d8-13.dat	CryptoLocker_rule2
behavioral2/memory/3704-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3852-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3704-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/3852-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3852-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3704-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3852-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000a0000000233d8-13.dat	UPX
behavioral2/memory/3704-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3852-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3704-28-0x0000000000500000-0x0000000000510000-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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	2024-05-25_97a294ca200e4168a8a6e46732ab223c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3704	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 3852 wrote to memory of 3704	3852	2024-05-25_97a294ca200e4168a8a6e46732ab223c_cryptolocker.exe	84
PID 3852 wrote to memory of 3704	3852	2024-05-25_97a294ca200e4168a8a6e46732ab223c_cryptolocker.exe	84
PID 3852 wrote to memory of 3704	3852	2024-05-25_97a294ca200e4168a8a6e46732ab223c_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-05-25_97a294ca200e4168a8a6e46732ab223c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-25_97a294ca200e4168a8a6e46732ab223c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3852
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3704

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
65KB

MD5
e83bd2eb5cce3bf9816da5e6d99421a7

SHA1
042d78d3cc066d7f87e5e69c9731799bc63c70f3

SHA256
8990420cee3c4ec3aed0016b82213dbdb1fbd781a93bedaa01fd4abc3511841f

SHA512
c7c6e1d6f3db8ff63c27299260d0e3d44144aa386b171a8daefc0f98ebd301aea6154f31734e42aae5f1f0eea97d5b1a7bc98c8aea4e5baccc81facb16619768

Download Submit
memory/3704-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3704-21-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/3704-27-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3704-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3852-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3852-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3852-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/3852-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3852-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download