db08afd55cd22c8b2811d1d6d8cbaa2cb797d7e74c5f7116f9ddb78d5ab330fb

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
03/05/2024, 04:27

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General

Target

2024-05-03_24318fa5f810c0314e82d36125943cba_cryptolocker.exe
Size

97KB
MD5

24318fa5f810c0314e82d36125943cba
SHA1

005e4f621533525212ce6f45a1116d6b4711b632
SHA256

db08afd55cd22c8b2811d1d6d8cbaa2cb797d7e74c5f7116f9ddb78d5ab330fb
SHA512

b987314c23c94b54a4273a4c16747c969dbe09faa1f3e00ade4ca3b56df2241e00a684a44682eff13450f43672813d0ae77fe5091844d544fa837ef5157a2333
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpYy9qY:AnBdOOtEvwDpj6zG

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4788-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b5e-13.dat	CryptoLocker_rule2
behavioral2/memory/4788-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2448-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4788-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023b5e-13.dat	CryptoLocker_set1
behavioral2/memory/4788-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2448-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4788-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000c000000023b5e-13.dat	UPX
behavioral2/memory/4788-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/2448-27-0x0000000000500000-0x000000000050F000-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-1-5-21-877519540-908060166-1852957295-1000\Control Panel\International\Geo\Nation	2024-05-03_24318fa5f810c0314e82d36125943cba_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2448	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4788-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000c000000023b5e-13.dat	upx
behavioral2/memory/4788-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/2448-27-0x0000000000500000-0x000000000050F000-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 4788 wrote to memory of 2448	4788	2024-05-03_24318fa5f810c0314e82d36125943cba_cryptolocker.exe	83
PID 4788 wrote to memory of 2448	4788	2024-05-03_24318fa5f810c0314e82d36125943cba_cryptolocker.exe	83
PID 4788 wrote to memory of 2448	4788	2024-05-03_24318fa5f810c0314e82d36125943cba_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-03_24318fa5f810c0314e82d36125943cba_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-03_24318fa5f810c0314e82d36125943cba_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4788
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2448

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
97KB

MD5
9db3fae97688a5dc1e6c5d5c746637d1

SHA1
b2ac99a360bf612203328ed83f93190de5784652

SHA256
066fe2851afb17f203511f6a6aac4d68dde9fc75575b8dbfdb5982a772dc74cc

SHA512
097cb9a08c8692831f164448d2877ea05b4ec1ffcaf8f16fc778e0fe68bf0c6d980846d5d1717f160cf0fa789fe2da9fc3c7ef7ac20a34716b6e27ecaf712e9e

Download Submit
memory/2448-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2448-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2448-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4788-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4788-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/4788-2-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/4788-9-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/4788-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download