764f81cf62434570d91f079c0283b48c4de93dd36e5d8f0c65a5f3cbf8e91962

Analysis

max time kernel
149s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
19/03/2024, 12:27

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General

Target

2024-03-19_1b3ebefd1f2dbb154d646101b280b46f_cryptolocker.exe
Size

67KB
MD5

1b3ebefd1f2dbb154d646101b280b46f
SHA1

a5c29868b7d46198b9053c49b155f2020df3d3be
SHA256

764f81cf62434570d91f079c0283b48c4de93dd36e5d8f0c65a5f3cbf8e91962
SHA512

bb72f7564c94b55652096daf67a785a34a5cef329cea5b2cc0e656683c519402f7685a4b3c843bf1d5aacc53c23c44c6aa8005231b28f82d65362980b051ffdd
SSDEEP

1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKUX:DW60sllyWOtEvwDpjwF85p

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/4592-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c0000000226fd-13.dat	CryptoLocker_rule2
behavioral2/memory/4592-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4592-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c0000000226fd-13.dat	CryptoLocker_set1
behavioral2/memory/4592-17-0x0000000000500000-0x000000000050B000-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-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	2024-03-19_1b3ebefd1f2dbb154d646101b280b46f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1620	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 4592 wrote to memory of 1620	4592	2024-03-19_1b3ebefd1f2dbb154d646101b280b46f_cryptolocker.exe	90
PID 4592 wrote to memory of 1620	4592	2024-03-19_1b3ebefd1f2dbb154d646101b280b46f_cryptolocker.exe	90
PID 4592 wrote to memory of 1620	4592	2024-03-19_1b3ebefd1f2dbb154d646101b280b46f_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-03-19_1b3ebefd1f2dbb154d646101b280b46f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-19_1b3ebefd1f2dbb154d646101b280b46f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4592
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1620

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
67KB

MD5
eaee521ebc6eb31b959500a6ad88b189

SHA1
6ef623e30b01fd8c59c6738205dbd3d892eb8ef2

SHA256
4c300b1c2b9c3d674b9fcda15ec07142dbd34d32c4f1c51f1cd60c389ec97299

SHA512
ef911db3dc37412df816034cf279adf436184d9ea59b97020f7768d6578ff3de6a73552b954b7872bbc9f2919833d1a9107a0b2beabfee9f1d8735cfb95c5b59

Download Submit
memory/4592-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4592-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4592-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4592-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4592-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download