eefed903d20096052e97809ef5d39bacb95ac14da83eb15598f69568968ca2b6

Analysis

max time kernel
149s
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
05/03/2024, 05:44

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General

Target

2024-03-05_61be0d32e8174e1af426fcc61b9e8d6b_cryptolocker.exe
Size

128KB
MD5

61be0d32e8174e1af426fcc61b9e8d6b
SHA1

bcd0d54b72c5c11c76c581825482b7c4255a8076
SHA256

eefed903d20096052e97809ef5d39bacb95ac14da83eb15598f69568968ca2b6
SHA512

a008e1679d22045adf8601e2d57868cdd2d826703d49a3c17f8d7deed7d256a2afc5d86f390c8fab3a2efb3604ba4afd202b9ce3761702d659e763070e6e6831
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1emN:AnBdOOtEvwDpj6zc

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/744-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000001e59e-13.dat	CryptoLocker_rule2
behavioral2/memory/744-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1664-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/744-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000001e59e-13.dat	CryptoLocker_set1
behavioral2/memory/744-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1664-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/744-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000700000001e59e-13.dat	UPX
behavioral2/memory/744-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1664-26-0x0000000000500000-0x000000000050F000-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-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	2024-03-05_61be0d32e8174e1af426fcc61b9e8d6b_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1664	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/744-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000700000001e59e-13.dat	upx
behavioral2/memory/744-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1664-26-0x0000000000500000-0x000000000050F000-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 744 wrote to memory of 1664	744	2024-03-05_61be0d32e8174e1af426fcc61b9e8d6b_cryptolocker.exe	90
PID 744 wrote to memory of 1664	744	2024-03-05_61be0d32e8174e1af426fcc61b9e8d6b_cryptolocker.exe	90
PID 744 wrote to memory of 1664	744	2024-03-05_61be0d32e8174e1af426fcc61b9e8d6b_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-03-05_61be0d32e8174e1af426fcc61b9e8d6b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-05_61be0d32e8174e1af426fcc61b9e8d6b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:744
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1664

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
128KB

MD5
ff5ac40d1a9d6ad7e583208f0b8c6a53

SHA1
2eb24d5579d91069183fe1eba0cc1ad52e23e318

SHA256
fd798b222cacb8dee57ba104f60d4f0a3ac899f665ab529d849bb849450fed7c

SHA512
84878c864a6b87e69d0ae7d1bd2cee879984cabe29a5baf4f2a6a10f5cf8642665c95a1f710ed4e72ba03daa5d0682690ec8abbc2f08baa5db2f2c95877afb1e

Download Submit
memory/744-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/744-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/744-2-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/744-3-0x0000000000710000-0x0000000000716000-memory.dmp

Filesize
24KB

Download
memory/744-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1664-19-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/1664-23-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/1664-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download