de441fa4d7e0ca245c2643c4a8124a90fb74d7c5de3b6f8c8e3c42e5128c0690

General

Target

2024-02-28_b3d63c08b0e3ee4b32de86935ba9062e_cryptolocker.exe
Size

64KB
MD5

b3d63c08b0e3ee4b32de86935ba9062e
SHA1

749731063cf48d2b7fe51cd38081696d89fe614f
SHA256

de441fa4d7e0ca245c2643c4a8124a90fb74d7c5de3b6f8c8e3c42e5128c0690
SHA512

9b6825d292851ef7c8b5fe488e18ae7db8f4d2d479a987926603d7803e597f335e6523527a502e2c4fb7879cb7743815138263b87de47a6cff8ff567a57d1d6d
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYibAo15:1nK6a+qdOOtEvwDpjt

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2892-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c000000012331-11.dat	CryptoLocker_rule2
behavioral1/memory/2892-13-0x0000000000680000-0x0000000000690000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2172-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2892-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2172-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2892-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c000000012331-11.dat	CryptoLocker_set1
behavioral1/memory/2892-13-0x0000000000680000-0x0000000000690000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2172-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2892-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2172-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2892-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000c000000012331-11.dat	UPX
behavioral1/memory/2892-13-0x0000000000680000-0x0000000000690000-memory.dmp	UPX
behavioral1/memory/2172-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2892-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2172-27-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2172	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2892	2024-02-28_b3d63c08b0e3ee4b32de86935ba9062e_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2892-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000c000000012331-11.dat	upx
behavioral1/memory/2892-13-0x0000000000680000-0x0000000000690000-memory.dmp	upx
behavioral1/memory/2172-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2892-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2172-27-0x0000000000500000-0x000000000050F311-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 4 IoCs

description	pid	Process	procid_target
PID 2892 wrote to memory of 2172	2892	2024-02-28_b3d63c08b0e3ee4b32de86935ba9062e_cryptolocker.exe	28
PID 2892 wrote to memory of 2172	2892	2024-02-28_b3d63c08b0e3ee4b32de86935ba9062e_cryptolocker.exe	28
PID 2892 wrote to memory of 2172	2892	2024-02-28_b3d63c08b0e3ee4b32de86935ba9062e_cryptolocker.exe	28
PID 2892 wrote to memory of 2172	2892	2024-02-28_b3d63c08b0e3ee4b32de86935ba9062e_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-28_b3d63c08b0e3ee4b32de86935ba9062e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-28_b3d63c08b0e3ee4b32de86935ba9062e_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2892
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2172

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
64KB

MD5
0472c0643e5be3e97c28e7e5f53a77f2

SHA1
2b2594c6fc330aa57e8418d010f100ecd2595c1f

SHA256
cfc268779c2e6c178231e3ab214bfc99dc049294057222833cb0c6214a7f9279

SHA512
ec037974cba413642df5e1c46f8667675f59a5543935523c0d2f4abef807d24d439afd0fcd91418c394d3257f336c7816b92fdfce88a2f93c46ba981ed806674

Download Submit
memory/2172-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2172-19-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2172-26-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2172-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2892-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2892-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2892-2-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/2892-9-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2892-13-0x0000000000680000-0x0000000000690000-memory.dmp

Filesize
64KB

Download
memory/2892-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

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