523a84c2881badab42901b43a23bfd37c70c95fb0eecba3362691cad74a2e920

Analysis

max time kernel
150s
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
27/04/2024, 23:38

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General

Target

2024-04-27_dfd7be1005e8fdbfaf6917a96fb04b97_cryptolocker.exe
Size

36KB
MD5

dfd7be1005e8fdbfaf6917a96fb04b97
SHA1

f2b8fc9ba91779f4b17c7496d3b8a6c997a3183a
SHA256

523a84c2881badab42901b43a23bfd37c70c95fb0eecba3362691cad74a2e920
SHA512

8cef59bd4acad1f8029b9f07bb9b005eba1f2aec0d0f2433073c707e2282eb6c1b69e4380f4f17c472a4b961a40115af8107731ba92b3bce00e3885eb230f5eb
SSDEEP

768:qUmnjFom/kLyMro2GtOOtEvwDpjeMLam5ax+N6:qUmnpomddpMOtEvwDpjjaYaR

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1912-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b7c-13.dat	CryptoLocker_rule2
behavioral2/memory/2992-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1912-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2992-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/1912-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023b7c-13.dat	CryptoLocker_set1
behavioral2/memory/2992-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1912-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2992-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1912-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000c000000023b7c-13.dat	UPX
behavioral2/memory/2992-19-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1912-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/2992-28-0x0000000000500000-0x000000000050F000-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-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	2024-04-27_dfd7be1005e8fdbfaf6917a96fb04b97_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2992	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1912-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000c000000023b7c-13.dat	upx
behavioral2/memory/2992-19-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1912-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/2992-28-0x0000000000500000-0x000000000050F000-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 1912 wrote to memory of 2992	1912	2024-04-27_dfd7be1005e8fdbfaf6917a96fb04b97_cryptolocker.exe	83
PID 1912 wrote to memory of 2992	1912	2024-04-27_dfd7be1005e8fdbfaf6917a96fb04b97_cryptolocker.exe	83
PID 1912 wrote to memory of 2992	1912	2024-04-27_dfd7be1005e8fdbfaf6917a96fb04b97_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-04-27_dfd7be1005e8fdbfaf6917a96fb04b97_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_dfd7be1005e8fdbfaf6917a96fb04b97_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1912
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2992

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
36KB

MD5
fa2039b562ae6bd7661b3f13b58d6254

SHA1
4d95ec7422842be6fd0697d09fcc8508827243bb

SHA256
7c9cbafba2efb4d85714337a065b4d23c72f5cdf94369659c4c56ee4897453b4

SHA512
fcd318ebf56f04c711d711cede4fd0b1e9cc82a2640519a98cf7427e6fd94ae5735c0e1d0445c1d2627c7a9760771015d2a6c68e661fabd78c13b73d8a65ff85

Download Submit
memory/1912-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1912-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1912-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1912-3-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/1912-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2992-19-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2992-21-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/2992-27-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/2992-28-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download