1aa6e7f861528566a327894c4064b0496c81d95732ff32f1a4c3f4cdb500b8c1

General

Target

2024-06-04_640dd37b13f0e29285f66269a26733c8_cryptolocker.exe
Size

64KB
MD5

640dd37b13f0e29285f66269a26733c8
SHA1

5f92b3fa76b86a2cda047701c48d730f475599a1
SHA256

1aa6e7f861528566a327894c4064b0496c81d95732ff32f1a4c3f4cdb500b8c1
SHA512

331070cddc844bc428fdaf9bb2aec2f6a7c59e72a0651675d24e294bb34839137ee63ec5be4f95b7fc1200d6ff201dd32b3ebd3c1efb9948c5f1f090624f6a28
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYMWRt:1nK6a+qdOOtEvwDpj4

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2696-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d0000000122d1-11.dat	CryptoLocker_rule2
behavioral1/memory/2696-13-0x0000000002480000-0x0000000002490000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2696-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2744-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2744-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2696-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000d0000000122d1-11.dat	CryptoLocker_set1
behavioral1/memory/2696-13-0x0000000002480000-0x0000000002490000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2696-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2744-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2744-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2696-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000d0000000122d1-11.dat	UPX
behavioral1/memory/2696-13-0x0000000002480000-0x0000000002490000-memory.dmp	UPX
behavioral1/memory/2696-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2744-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2744-27-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2744	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2696	2024-06-04_640dd37b13f0e29285f66269a26733c8_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2696-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000d0000000122d1-11.dat	upx
behavioral1/memory/2696-13-0x0000000002480000-0x0000000002490000-memory.dmp	upx
behavioral1/memory/2696-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2744-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2744-27-0x0000000000500000-0x000000000050F311-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 2696 wrote to memory of 2744	2696	2024-06-04_640dd37b13f0e29285f66269a26733c8_cryptolocker.exe	28
PID 2696 wrote to memory of 2744	2696	2024-06-04_640dd37b13f0e29285f66269a26733c8_cryptolocker.exe	28
PID 2696 wrote to memory of 2744	2696	2024-06-04_640dd37b13f0e29285f66269a26733c8_cryptolocker.exe	28
PID 2696 wrote to memory of 2744	2696	2024-06-04_640dd37b13f0e29285f66269a26733c8_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-06-04_640dd37b13f0e29285f66269a26733c8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-04_640dd37b13f0e29285f66269a26733c8_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2696
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2744

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
fc5eb9049479b9fe408b51aeee0eca72

SHA1
35480fbdc9a68b4b5791585318b0465ad9a7c317

SHA256
7e6d792b29748f0b918a132559f65bc9ccbc5ab2fdde7dea186d5f1518769803

SHA512
f46c80746d7327ebf462cc0d60f513cf85bc4d00ad061cc142d5610e41bf7199005f2d138d93b84c2d5991b9020a8500620b59a098d752575ed4048b61a73883

Download Submit
memory/2696-1-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/2696-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2696-9-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/2696-2-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2696-13-0x0000000002480000-0x0000000002490000-memory.dmp

Filesize
64KB

Download
memory/2696-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2744-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2744-19-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2744-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2744-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

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