8d6b3834c8d4c74a21533dc6744732b41c0cc9bee7b68dea1244e063064dd050

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
07-03-2024 01:01

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General

Target

2024-03-07_bb2163730d218ecd5129e2159049bd6f_cryptolocker.exe
Size

88KB
MD5

bb2163730d218ecd5129e2159049bd6f
SHA1

e9c17d5890f92f809b4b9ec9c4745ac66217364c
SHA256

8d6b3834c8d4c74a21533dc6744732b41c0cc9bee7b68dea1244e063064dd050
SHA512

89ca4ff2ae32c53372020c0f33226fd1fb7420e5821b268cb9d4fb804df5ed4232355ece760ce725f0e08ac1dd8368a1a6a7ad049c3a1d0db122602c81e324c1
SSDEEP

768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtIJY/vG:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgC

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1008-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e9a0-13.dat	CryptoLocker_rule2
behavioral2/memory/1008-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4540-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1008-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001e9a0-13.dat	CryptoLocker_set1
behavioral2/memory/1008-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4540-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1008-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000300000001e9a0-13.dat	UPX
behavioral2/memory/1008-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4540-26-0x0000000000500000-0x000000000050F000-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-1-5-21-275798769-4264537674-1142822080-1000\Control Panel\International\Geo\Nation	2024-03-07_bb2163730d218ecd5129e2159049bd6f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4540	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1008-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000300000001e9a0-13.dat	upx
behavioral2/memory/1008-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4540-26-0x0000000000500000-0x000000000050F000-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 1008 wrote to memory of 4540	1008	2024-03-07_bb2163730d218ecd5129e2159049bd6f_cryptolocker.exe	90
PID 1008 wrote to memory of 4540	1008	2024-03-07_bb2163730d218ecd5129e2159049bd6f_cryptolocker.exe	90
PID 1008 wrote to memory of 4540	1008	2024-03-07_bb2163730d218ecd5129e2159049bd6f_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-03-07_bb2163730d218ecd5129e2159049bd6f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-07_bb2163730d218ecd5129e2159049bd6f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1008
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4540

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
88KB

MD5
2c26fabd8413a079c031f539b2fac19c

SHA1
8d19b74ccdfa076ca19828f5c94037a6cd300971

SHA256
895d6a96da833cae7232de94fd99c859ebebd374ecb8091ab64374fa2aa0fb9e

SHA512
9a88724b893e1dd2e792564b08a1c00965acd75475219ac13677ca27cd3235364967c824f00f8d174bcef2215b9b8962e5ecf60790bc07c6f28cd292ded4e319

Download Submit
memory/1008-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1008-1-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/1008-2-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/1008-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/1008-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4540-19-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/4540-22-0x0000000000850000-0x0000000000856000-memory.dmp

Filesize
24KB

Download
memory/4540-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download