66ca91fdd5a099de2a5bd378344ff701e1e27ca6a990956a8f2dcce129adae7c

Analysis

max time kernel
149s
max time network
153s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
04/02/2024, 12:32

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General

Target

2024-02-04_63a7253521d8f34fbf6ad32c969f2485_cryptolocker.exe
Size

45KB
MD5

63a7253521d8f34fbf6ad32c969f2485
SHA1

6fb400322e8b75d6020f1d12ef80a16d5e3d1166
SHA256

66ca91fdd5a099de2a5bd378344ff701e1e27ca6a990956a8f2dcce129adae7c
SHA512

f4560b1f4089117c56f9f9a18078568f0a3ad5ac8ea4b29e7ba9344400411fb321f05171a7e7961c5d92c834505ca54e0e93c4fcaee95e3ed2293d4232167c0e
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MocBm:qmbhXDmjr5MOtEvwDpj5cDtKkQZQSM

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2652-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a000000012243-11.dat	CryptoLocker_rule2
behavioral1/memory/2652-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2768-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2768-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral1/memory/2652-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2768-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2768-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2652-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000a000000012243-11.dat	UPX
behavioral1/memory/2652-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2768-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2768-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2768	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2652	2024-02-04_63a7253521d8f34fbf6ad32c969f2485_cryptolocker.exe

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 2652 wrote to memory of 2768	2652	2024-02-04_63a7253521d8f34fbf6ad32c969f2485_cryptolocker.exe	28
PID 2652 wrote to memory of 2768	2652	2024-02-04_63a7253521d8f34fbf6ad32c969f2485_cryptolocker.exe	28
PID 2652 wrote to memory of 2768	2652	2024-02-04_63a7253521d8f34fbf6ad32c969f2485_cryptolocker.exe	28
PID 2652 wrote to memory of 2768	2652	2024-02-04_63a7253521d8f34fbf6ad32c969f2485_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-04_63a7253521d8f34fbf6ad32c969f2485_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_63a7253521d8f34fbf6ad32c969f2485_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2652
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2768

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
45KB

MD5
de27b1c378494198fbba03ad50520ec6

SHA1
16107c391cf9dcdbb247be8b928aba0c5157139b

SHA256
4d247d8fdf66d0e89c0783410da553024f31ddd599d4ca4176b4ccaf4b715b8c

SHA512
1777b4845dcaae3cb8c4dda7bfb711cda5717b399c701588eda51fd4d163027376fd7ad2992ab79b97584bd0b54fe7a6fa2037a02bc82b4b7f4d28980ea0bc01

Download Submit
memory/2652-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2652-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2652-3-0x00000000002F0000-0x00000000002F6000-memory.dmp

Filesize
24KB

Download
memory/2652-2-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2652-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2768-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2768-19-0x0000000000450000-0x0000000000456000-memory.dmp

Filesize
24KB

Download
memory/2768-18-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2768-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download