56687cca2ad3c0c5cb172132bb9ebbaaa67a3180dfb8ff0e9b4340743378e226

General

Target

2024-04-17_f31d3c5febf3945995391710929d7fa0_cryptolocker.exe
Size

57KB
MD5

f31d3c5febf3945995391710929d7fa0
SHA1

5ca4a57d6b3579886bd803f54b4514583ae2e558
SHA256

56687cca2ad3c0c5cb172132bb9ebbaaa67a3180dfb8ff0e9b4340743378e226
SHA512

949436a4aaaf9c8e891d6e44aa86d59dda6d099efbbe935ee19ca2c72de550dd5c19b9608271298f307b361ab5abb647226a65526da4dfbd5268b49a465b42a5
SSDEEP

768:H6LsoEEeegiZPvEhHSG+gk5NQXtckstOOtEvwDpjhBaD3TUogs/VXpAPy:H6QFElP6n+gou9cvMOtEvwDpjCpVXv

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2272-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c000000015bf3-11.dat	CryptoLocker_rule2
behavioral1/memory/2272-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1704-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1704-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2272-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c000000015bf3-11.dat	CryptoLocker_set1
behavioral1/memory/2272-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1704-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1704-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2272-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000c000000015bf3-11.dat	UPX
behavioral1/memory/2272-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1704-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1704-28-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1704	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2272	2024-04-17_f31d3c5febf3945995391710929d7fa0_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2272-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000c000000015bf3-11.dat	upx
behavioral1/memory/2272-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1704-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1704-28-0x0000000000500000-0x0000000000510000-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 2272 wrote to memory of 1704	2272	2024-04-17_f31d3c5febf3945995391710929d7fa0_cryptolocker.exe	28
PID 2272 wrote to memory of 1704	2272	2024-04-17_f31d3c5febf3945995391710929d7fa0_cryptolocker.exe	28
PID 2272 wrote to memory of 1704	2272	2024-04-17_f31d3c5febf3945995391710929d7fa0_cryptolocker.exe	28
PID 2272 wrote to memory of 1704	2272	2024-04-17_f31d3c5febf3945995391710929d7fa0_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-17_f31d3c5febf3945995391710929d7fa0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-17_f31d3c5febf3945995391710929d7fa0_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2272
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1704

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
57KB

MD5
eb5d57494e6724f6f1fb8b5678399587

SHA1
83c194866df162d6365ccee88b286ef836a49aad

SHA256
ace9105ad10d7946e7b6cc95b3f889d166690d6886adc5255f862ca28494d008

SHA512
28e141d9095ad4377fcef00fe2c794f5e8767ee8cc037e1743abbd5ce87609659bdf619f70859cdcfeb21c5dc4c16771ea4cd09d9086cc7176f35ad7848664e9

Download Submit
memory/1704-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1704-19-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/1704-22-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1704-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2272-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2272-1-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/2272-2-0x0000000000450000-0x0000000000456000-memory.dmp

Filesize
24KB

Download
memory/2272-3-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/2272-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2272-14-0x0000000002800000-0x0000000002810000-memory.dmp

Filesize
64KB

Download
memory/2272-27-0x0000000002800000-0x0000000002810000-memory.dmp

Filesize
64KB

Download

Analysis

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