8aa0ac24743e423e0647477a5d793169d43ad5c64c7e6d0563462baa50d58478

General

Target

2024-03-18_1c4838eddedbada5ff0db04685b12c36_cryptolocker.exe
Size

80KB
MD5

1c4838eddedbada5ff0db04685b12c36
SHA1

52cb5fc6db6ca71c527cae5736688e3972dcd8a9
SHA256

8aa0ac24743e423e0647477a5d793169d43ad5c64c7e6d0563462baa50d58478
SHA512

39eb65a86417c28d71f8c1515b5835d3103064aa58d8e1d5234b52725ed5a1698f0baf20e17358e805dde242d0a196b7c687de84a4fe2d99bf4cc8599b61a3a6
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1kyJS1Y:zCsanOtEvwDpj+

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2744-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a000000012252-11.dat	CryptoLocker_rule2
behavioral1/memory/2744-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2616-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2744-12-0x00000000023A0000-0x00000000023B0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2616-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2744-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000a000000012252-11.dat	CryptoLocker_set1
behavioral1/memory/2744-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2616-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2744-12-0x00000000023A0000-0x00000000023B0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2616-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2744-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000a000000012252-11.dat	UPX
behavioral1/memory/2744-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2616-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2744-12-0x00000000023A0000-0x00000000023B0000-memory.dmp	UPX
behavioral1/memory/2616-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2616	misid.exe

Loads dropped DLL 1 IoCs

pid	Process
2744	2024-03-18_1c4838eddedbada5ff0db04685b12c36_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2744-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000a000000012252-11.dat	upx
behavioral1/memory/2744-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2616-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2744-12-0x00000000023A0000-0x00000000023B0000-memory.dmp	upx
behavioral1/memory/2616-27-0x0000000000500000-0x0000000000510000-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 2744 wrote to memory of 2616	2744	2024-03-18_1c4838eddedbada5ff0db04685b12c36_cryptolocker.exe	28
PID 2744 wrote to memory of 2616	2744	2024-03-18_1c4838eddedbada5ff0db04685b12c36_cryptolocker.exe	28
PID 2744 wrote to memory of 2616	2744	2024-03-18_1c4838eddedbada5ff0db04685b12c36_cryptolocker.exe	28
PID 2744 wrote to memory of 2616	2744	2024-03-18_1c4838eddedbada5ff0db04685b12c36_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-18_1c4838eddedbada5ff0db04685b12c36_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-18_1c4838eddedbada5ff0db04685b12c36_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2744
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:2616

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\misid.exe

Filesize
80KB

MD5
9055c2c88b0426ab302a0c4baa17f560

SHA1
2a1f28fcc88cc00099c3f0e549c8b4327cb7b10a

SHA256
ccc8677e27df0b0bab2db140a0944db61c416acec77cd8bde714784c82ed306f

SHA512
55f74f4180b6f22e13145852c829e10256e04d211416dff6362e3b1c6f6918cc26727ae80d960381527ed47fc637df5470bcfcd0a44e0d147a042eaacdf59bc2

Download Submit
memory/2616-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2616-19-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/2616-25-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2616-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2744-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2744-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2744-2-0x0000000001CA0000-0x0000000001CA6000-memory.dmp

Filesize
24KB

Download
memory/2744-9-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2744-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2744-12-0x00000000023A0000-0x00000000023B0000-memory.dmp

Filesize
64KB

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Analysis

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