9b3186faf5ba9537606c093f15c78cdbc7fe4613d11a3cd2b5ffdd97d1eabd8f

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
12/03/2024, 00:29

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-03-12_5725a1e29eb03e930723c5880dd717b2_cryptolocker.exe
Size

56KB
MD5

5725a1e29eb03e930723c5880dd717b2
SHA1

d73f66443972072346a90e27319095caa01d79cc
SHA256

9b3186faf5ba9537606c093f15c78cdbc7fe4613d11a3cd2b5ffdd97d1eabd8f
SHA512

16d3a001cc9fc11006cfd7f8f2f40451eaedd4a38f65a093708cad53309ea11d3f6721f9b84c9b196075406ecd84701d5a85093e37617b646e5d6ce7dafe3643
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5ax8iH9:z6QFElP6n+gKmddpMOtEvwDpj9aYa99

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4060-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023170-13.dat	CryptoLocker_rule2
behavioral2/memory/4060-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4960-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4060-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023170-13.dat	CryptoLocker_set1
behavioral2/memory/4060-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4960-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4060-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000c000000023170-13.dat	UPX
behavioral2/memory/4060-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4960-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2024-03-12_5725a1e29eb03e930723c5880dd717b2_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4960	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4060-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000c000000023170-13.dat	upx
behavioral2/memory/4060-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4960-26-0x0000000000500000-0x0000000000510000-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 4060 wrote to memory of 4960	4060	2024-03-12_5725a1e29eb03e930723c5880dd717b2_cryptolocker.exe	85
PID 4060 wrote to memory of 4960	4060	2024-03-12_5725a1e29eb03e930723c5880dd717b2_cryptolocker.exe	85
PID 4060 wrote to memory of 4960	4060	2024-03-12_5725a1e29eb03e930723c5880dd717b2_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-03-12_5725a1e29eb03e930723c5880dd717b2_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-12_5725a1e29eb03e930723c5880dd717b2_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4060
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4960

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
57KB

MD5
5b11b018c54fac3f73d23bd92272dfc7

SHA1
9f4f68d2ce8b773540fdf4cca63b27273b5c3675

SHA256
dae451066f956e0bc0f56c8dfb88f29b8be3a871c3e0cb5f4b8531c6085f4f60

SHA512
6ffa43e2c240b202c2fec5a8b29b96a26291a3f6c76b864e6e58184eaef434e6e99704484a0d333022541d32adb72c06969f6537aec02bd6e4275a5cf5d7c58f

Download Submit
memory/4060-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4060-1-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/4060-2-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/4060-3-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/4060-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4960-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4960-22-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4960-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download