55ce7f44f973697fb5818a1605c20b2f236bb048ff687d5a4ccd91dee08490e3

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
16-05-2024 06:41

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General

Target

2024-05-16_3d908dae43e624d9fc82c2bba8a76836_cryptolocker.exe
Size

69KB
MD5

3d908dae43e624d9fc82c2bba8a76836
SHA1

18d6d392597108134a3efd865635c73fef264f0a
SHA256

55ce7f44f973697fb5818a1605c20b2f236bb048ff687d5a4ccd91dee08490e3
SHA512

2322578cdb089579dc52c4c53e5b002e1a9cec699bcc2592980796fa78849512e4290327ade35ff706aa9b583f98185497368cf686fa1e11da3a72f0e1a231c9
SSDEEP

768:quVbxjgQNQXtckstOOtEvwDpjAaDOK6PsED3VK2+ZtyOjgO4r9vFAg2rq6W1A1PL:quJu9cvMOtEvwDpjWYTjipvF2bx1PQAL

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2632-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000022f51-13.dat	CryptoLocker_rule2
behavioral2/memory/2632-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5052-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2632-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000022f51-13.dat	CryptoLocker_set1
behavioral2/memory/2632-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5052-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2632-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0008000000022f51-13.dat	UPX
behavioral2/memory/2632-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/5052-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-16_3d908dae43e624d9fc82c2bba8a76836_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5052	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2632-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0008000000022f51-13.dat	upx
behavioral2/memory/2632-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/5052-27-0x0000000000500000-0x000000000050F000-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 3 IoCs

description	pid	Process	procid_target
PID 2632 wrote to memory of 5052	2632	2024-05-16_3d908dae43e624d9fc82c2bba8a76836_cryptolocker.exe	82
PID 2632 wrote to memory of 5052	2632	2024-05-16_3d908dae43e624d9fc82c2bba8a76836_cryptolocker.exe	82
PID 2632 wrote to memory of 5052	2632	2024-05-16_3d908dae43e624d9fc82c2bba8a76836_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-16_3d908dae43e624d9fc82c2bba8a76836_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-16_3d908dae43e624d9fc82c2bba8a76836_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2632
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5052

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
69KB

MD5
e1d1af0d47474c7d07ca40d579450414

SHA1
3b957ec7a37415e54580f7ba60886d1d52b2a298

SHA256
4929512b94dee9df04721c01964b91f95b36d4b82e9fbc282eefcd77c8f7d1bb

SHA512
0c6a0f4b7ee4fab96ccb447684ecb89af420d451d54a2f5bcdd2e96273e19833400baf42e301d1217b5133a8a5eec88debe8559a3f2f1ec0020c1798903a1904

Download Submit
memory/2632-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2632-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2632-9-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2632-2-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/2632-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/5052-20-0x00000000007E0000-0x00000000007E6000-memory.dmp

Filesize
24KB

Download
memory/5052-26-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/5052-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download