420645bd5714a71fe953da9cc71bd69982072836656726f07bcf5da3a4abdcfd

Analysis

max time kernel
148s
max time network
151s
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 19:22

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General

Target

2024-02-21_02b60dd979653bf2d050aa25f872818e_cryptolocker.exe
Size

105KB
MD5

02b60dd979653bf2d050aa25f872818e
SHA1

8bfc25e10ec00f158b04d5e3d9d46a4040be3d28
SHA256

420645bd5714a71fe953da9cc71bd69982072836656726f07bcf5da3a4abdcfd
SHA512

42a57df97a97414cf2bf38c7306c35fba5a47bd092252131fc897a4cc842d989be4623dd5a9a9e79f40995ec5246aaebdb5bf07d47794f70308028c8f6580732
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6Gksw:1nK6a+qdOOtEvwDpjw

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1016-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002303a-13.dat	CryptoLocker_rule2
behavioral2/memory/1016-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/692-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1016-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002303a-13.dat	CryptoLocker_set1
behavioral2/memory/1016-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/692-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1016-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000800000002303a-13.dat	UPX
behavioral2/memory/1016-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/692-26-0x0000000000500000-0x000000000050F311-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-1-5-21-1392040655-2056082574-619088944-1000\Control Panel\International\Geo\Nation	2024-02-21_02b60dd979653bf2d050aa25f872818e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
692	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1016-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000800000002303a-13.dat	upx
behavioral2/memory/1016-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/692-26-0x0000000000500000-0x000000000050F311-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 1016 wrote to memory of 692	1016	2024-02-21_02b60dd979653bf2d050aa25f872818e_cryptolocker.exe	84
PID 1016 wrote to memory of 692	1016	2024-02-21_02b60dd979653bf2d050aa25f872818e_cryptolocker.exe	84
PID 1016 wrote to memory of 692	1016	2024-02-21_02b60dd979653bf2d050aa25f872818e_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-21_02b60dd979653bf2d050aa25f872818e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-21_02b60dd979653bf2d050aa25f872818e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1016
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:692

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
105KB

MD5
de6c7bf7eccf6d7a5f9459d579fc1f6b

SHA1
2ab593d59b44213efa8c62f4c83ce304c307f234

SHA256
012d869cd690e9f4ebcce9783a29cb5b4f81d99e4d558fac6e22d4320694bc1c

SHA512
b96491da87686e626b4b08eb6a608caab8aa628d4c8177175346753ec565337a0055ec5dc7df1518306b6561637a4c365f8f66d791b7ccd26f790ef1eaf0ecc1

Download Submit
memory/692-19-0x0000000000870000-0x0000000000876000-memory.dmp

Filesize
24KB

Download
memory/692-22-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/692-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1016-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1016-1-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/1016-2-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/1016-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/1016-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download