012d989851ed3a87ef9eabd32322ffb5f40b9c5665ef849cff3c92505da3100f

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
23/05/2024, 04:28

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General

Target

2024-05-23_7192733535cac9f4a55a8748955d9335_cryptolocker.exe
Size

67KB
MD5

7192733535cac9f4a55a8748955d9335
SHA1

0d29965fb43035f0dc800e4731b69cbd2fa821b5
SHA256

012d989851ed3a87ef9eabd32322ffb5f40b9c5665ef849cff3c92505da3100f
SHA512

04cb8fb93ad42d808a58faef7404f5240e503b7244bc742014cfd47d1bcc443d5be46efb371da780a99828342881efe74a7d0b534e174d8f382b42b73d33bf7f
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYibAoQRx:1nK6a+qdOOtEvwDpjk

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2564-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000d000000023383-13.dat	CryptoLocker_rule2
behavioral2/memory/2564-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2700-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2564-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000d000000023383-13.dat	CryptoLocker_set1
behavioral2/memory/2564-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/2700-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2564-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000d000000023383-13.dat	UPX
behavioral2/memory/2564-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/2700-26-0x0000000000500000-0x000000000050F311-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-23_7192733535cac9f4a55a8748955d9335_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2700	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2564-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000d000000023383-13.dat	upx
behavioral2/memory/2564-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/2700-26-0x0000000000500000-0x000000000050F311-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 2564 wrote to memory of 2700	2564	2024-05-23_7192733535cac9f4a55a8748955d9335_cryptolocker.exe	85
PID 2564 wrote to memory of 2700	2564	2024-05-23_7192733535cac9f4a55a8748955d9335_cryptolocker.exe	85
PID 2564 wrote to memory of 2700	2564	2024-05-23_7192733535cac9f4a55a8748955d9335_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-23_7192733535cac9f4a55a8748955d9335_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_7192733535cac9f4a55a8748955d9335_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2564
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2700

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
67KB

MD5
633d03842418a20a67e55b49db1b14be

SHA1
9b1eb162159e9c64550bda6af38e1b1badd3f7bd

SHA256
8635699990f49c7d17ee0a711d988f7d055c4362c3ab5bf6373b47f46f2e3ce9

SHA512
8b291b8574b85489ef23abe1daf5f7f208e009e164717d75b5c17bc18d7fd72495203c2dcf0d94fa54dfc30fc10672b57147c757d6262a11942bff59c9bb7d35

Download Submit
memory/2564-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2564-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2564-2-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/2564-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2564-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2700-19-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/2700-25-0x0000000002140000-0x0000000002146000-memory.dmp

Filesize
24KB

Download
memory/2700-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download