39613cdf58a0128a3ebfc5d5517652c6d56141f873f6d49831e754459071dea7

Analysis

max time kernel
151s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
21/02/2024, 20:51

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General

Target

2024-02-21_d4ba43102b7e88aa061ced15fa3dac95_cryptolocker.exe
Size

55KB
MD5

d4ba43102b7e88aa061ced15fa3dac95
SHA1

ef9316dfdd8297ee3ede20c659f7bbae8846528b
SHA256

39613cdf58a0128a3ebfc5d5517652c6d56141f873f6d49831e754459071dea7
SHA512

753f1ca80c798087b19c6b6b0f15f6df35c96ca7080fd3c9a0e35228ae7aa635c9848fc86e0f1cabcf54fe218616f73e445ba49966abec668fbd0fecbfd1b4f1
SSDEEP

768:79inqyNR/QtOOtEvwDpjBK/iVTab3GRuv3VylSV/Cd9z37:79mqyNhQMOtEvwDpjBPY7xv3g8SH

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/4392-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023221-13.dat	CryptoLocker_rule2
behavioral2/memory/4392-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4392-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023221-13.dat	CryptoLocker_set1
behavioral2/memory/4392-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

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-1-5-21-3538781373-1545967067-4263767959-1000\Control Panel\International\Geo\Nation	2024-02-21_d4ba43102b7e88aa061ced15fa3dac95_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3480	asih.exe

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 4392 wrote to memory of 3480	4392	2024-02-21_d4ba43102b7e88aa061ced15fa3dac95_cryptolocker.exe	85
PID 4392 wrote to memory of 3480	4392	2024-02-21_d4ba43102b7e88aa061ced15fa3dac95_cryptolocker.exe	85
PID 4392 wrote to memory of 3480	4392	2024-02-21_d4ba43102b7e88aa061ced15fa3dac95_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-21_d4ba43102b7e88aa061ced15fa3dac95_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-21_d4ba43102b7e88aa061ced15fa3dac95_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4392
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3480

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
55KB

MD5
c685287c18e22dd775efebbb7dc005e8

SHA1
8cb129b7f113ee5466e59ede35f3e56fbf083c4a

SHA256
715eea2ab0a523618b14a2cc6769e6ca5bee30913ae7d9e8c7e3f0eb0e72db36

SHA512
cec8208d5268512a7374287b96f0257cc2ffacfc4df17b4db796cd112da65d1d0335b22153aca6414acb76f5eb5bcf90869dacb3051fa66825bdf0d68fe1224f

Download Submit
memory/3480-19-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/3480-21-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/4392-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4392-1-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/4392-2-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/4392-3-0x0000000000680000-0x0000000000686000-memory.dmp

Filesize
24KB

Download
memory/4392-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download