c591e4d3fa630f8c5c022527d28fdb90bc9213c1238b487d277b7bf3e98fa93c

General

Target

2024-02-19_2497b2bd465fa40c1d8ced4538d9a739_cryptolocker.exe
Size

56KB
MD5

2497b2bd465fa40c1d8ced4538d9a739
SHA1

0aaecbf561f0fd549b91a676fde042470d1743a4
SHA256

c591e4d3fa630f8c5c022527d28fdb90bc9213c1238b487d277b7bf3e98fa93c
SHA512

e8d758eec7691c2f0ecc0d984c766baee9e3942c7cb063b606dc1e7e5ff8f48153d4d1a8d79427cbe4d54198ddc14820b30ebdf5d28760c579d46a5db10b6651
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5axc9Cie:z6QFElP6n+gKmddpMOtEvwDpj9aYap1

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2848-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x0008000000012233-11.dat	CryptoLocker_rule2
behavioral1/memory/2700-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2848-15-0x0000000001EB0000-0x0000000001EC0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2848-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2700-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2848-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x0008000000012233-11.dat	CryptoLocker_set1
behavioral1/memory/2700-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2848-15-0x0000000001EB0000-0x0000000001EC0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2848-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2700-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2848-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x0008000000012233-11.dat	UPX
behavioral1/memory/2700-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2848-14-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2700-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2700	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2848	2024-02-19_2497b2bd465fa40c1d8ced4538d9a739_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2848-1-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x0008000000012233-11.dat	upx
behavioral1/memory/2700-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2848-14-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2700-27-0x0000000000500000-0x0000000000510000-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 2848 wrote to memory of 2700	2848	2024-02-19_2497b2bd465fa40c1d8ced4538d9a739_cryptolocker.exe	28
PID 2848 wrote to memory of 2700	2848	2024-02-19_2497b2bd465fa40c1d8ced4538d9a739_cryptolocker.exe	28
PID 2848 wrote to memory of 2700	2848	2024-02-19_2497b2bd465fa40c1d8ced4538d9a739_cryptolocker.exe	28
PID 2848 wrote to memory of 2700	2848	2024-02-19_2497b2bd465fa40c1d8ced4538d9a739_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-19_2497b2bd465fa40c1d8ced4538d9a739_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-19_2497b2bd465fa40c1d8ced4538d9a739_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2848
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2700

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
56KB

MD5
845b9b9550e8f573dea558f702691cff

SHA1
db8dbe299e329cb6fcd511292ac8d3d55ad50088

SHA256
1d8fbe9648f2a9a85ef7dd6fbd388a4d9224d1982859cdd4e0ed7d309edd5fd9

SHA512
02d20f36db904d05248f913ad75ed71a8ec210e4b59b281c583cf93baf880331bb3641443af915ffe326a0e5504d9e70d9b6be02c7ae119639ca28c5562f98d9

Download Submit
memory/2700-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2700-19-0x00000000002F0000-0x00000000002F6000-memory.dmp

Filesize
24KB

Download
memory/2700-26-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2700-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2848-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2848-0-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2848-2-0x00000000003B0000-0x00000000003B6000-memory.dmp

Filesize
24KB

Download
memory/2848-3-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2848-15-0x0000000001EB0000-0x0000000001EC0000-memory.dmp

Filesize
64KB

Download
memory/2848-14-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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