ebb2cedea91d05d62c7c5b09a859674313d98a501da10e91e084183143958212

Analysis

max time kernel
152s
max time network
164s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
11/03/2024, 02:24

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General

Target

2024-03-11_97e4f0ec6124b039515454b09dddbad7_cryptolocker.exe
Size

86KB
MD5

97e4f0ec6124b039515454b09dddbad7
SHA1

6f34c4662824c4632eba6c236aaaa46cf049b538
SHA256

ebb2cedea91d05d62c7c5b09a859674313d98a501da10e91e084183143958212
SHA512

a89b58ca4fb13b7f06ce84e39f2d91512d1ac07a04e4f63d6a06e6effdecd643cd80e9ac6455168f8c934209c2ee4a77f121dd2d5328413c50f6e74053e4691d
SSDEEP

768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtISEw:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgF

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4632-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000a0000000231f7-13.dat	CryptoLocker_rule2
behavioral2/memory/4632-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4244-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4632-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000a0000000231f7-13.dat	CryptoLocker_set1
behavioral2/memory/4632-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4244-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4632-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000a0000000231f7-13.dat	UPX
behavioral2/memory/4632-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4244-26-0x0000000000500000-0x000000000050F000-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-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	2024-03-11_97e4f0ec6124b039515454b09dddbad7_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4244	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4632-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000a0000000231f7-13.dat	upx
behavioral2/memory/4632-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4244-26-0x0000000000500000-0x000000000050F000-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 4632 wrote to memory of 4244	4632	2024-03-11_97e4f0ec6124b039515454b09dddbad7_cryptolocker.exe	89
PID 4632 wrote to memory of 4244	4632	2024-03-11_97e4f0ec6124b039515454b09dddbad7_cryptolocker.exe	89
PID 4632 wrote to memory of 4244	4632	2024-03-11_97e4f0ec6124b039515454b09dddbad7_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-03-11_97e4f0ec6124b039515454b09dddbad7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-11_97e4f0ec6124b039515454b09dddbad7_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4632
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4244

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
87KB

MD5
6fa5d78ab187cfadd4cdc251c99d8fb6

SHA1
466d22523a9b07b8fff289939a160a2633abb212

SHA256
07fe2364065ad052aa6c55ac16b23fb201f47952cac163fb03ed1fcec51033ab

SHA512
1da0971aa390e571ad921609c61eec478ea8c48deeca512641ecb7d46ab7fe2a8851c91d94d34a8c88e075cec04a4b17c6c58d27a5754d3bb13ca8a6263583ca

Download Submit
memory/4244-19-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/4244-20-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4244-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4632-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4632-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/4632-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/4632-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/4632-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download