8e773ff162c9c380da2d68736cb343dcb0bb46942c8dd418c0f063fa4345207a

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
02/05/2024, 01:02

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General

Target

2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe
Size

38KB
MD5

a4fa9de8350ebb0b85e76bbce3a658c1
SHA1

66051cf13dafdcbec642bb67415e4d692a8e27da
SHA256

8e773ff162c9c380da2d68736cb343dcb0bb46942c8dd418c0f063fa4345207a
SHA512

2359da2d9c47b0d2c84797b3432ec731caeafc31f33eeb0a9af19264747a39980701580be1e71a1d124ae0dccaf4928103904df15f1f5a27132ab50f416ba0ff
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaBc:qDdFJy3QMOtEvwDpjjWMl7TdW

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2600-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00090000000233e4-13.dat	CryptoLocker_rule2
behavioral2/memory/2600-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/748-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2600-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00090000000233e4-13.dat	CryptoLocker_set1
behavioral2/memory/2600-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/748-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2600-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00090000000233e4-13.dat	UPX
behavioral2/memory/2600-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/748-27-0x0000000000500000-0x0000000000510000-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-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
748	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2600-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00090000000233e4-13.dat	upx
behavioral2/memory/2600-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/748-27-0x0000000000500000-0x0000000000510000-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 2600 wrote to memory of 748	2600	2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe	82
PID 2600 wrote to memory of 748	2600	2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe	82
PID 2600 wrote to memory of 748	2600	2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2600
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:748

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
38KB

MD5
52f228ab6bee7f6966da494ea1b26605

SHA1
9a7225400f68f53dfc3578d98b0d9057cf72d806

SHA256
b4f7d270df2423150eaac836a37647b63c2677b6cd92fa79e80b10ceffdc8523

SHA512
90ac9ee94f3687ba97f3ac19d5728ca08935444515777b16fcf35721618e418423c90b66d2ade3d33cd112ac6664b0eaae6aae21331c5a485de9316bd5bf5ff1

Download Submit
memory/748-20-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/748-26-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/748-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2600-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2600-2-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/2600-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2600-9-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2600-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download