9580ab28997f0703bec7572d07bc0fcdfde14ace5c89e9f0f0a79a6b44f672ac

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
19/02/2024, 01:00

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General

Target

2024-02-19_e4334cbfdb9dcd93fa0b6654c28d2001_cryptolocker.exe
Size

55KB
MD5

e4334cbfdb9dcd93fa0b6654c28d2001
SHA1

0fd99ef6f11b98cf64fd33f0f209581aa63d5c51
SHA256

9580ab28997f0703bec7572d07bc0fcdfde14ace5c89e9f0f0a79a6b44f672ac
SHA512

d55f28dc365d957cd83a2364e82d017452cfe137582060243f4078c3aaa7c378a2d34c16ed13ebb0ad0643254515108e210dd353570eb049e2698b9779769c19
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5axcE9GF:z6QFElP6n+gKmddpMOtEvwDpj9aYa59A

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3964-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000231ea-13.dat	CryptoLocker_rule2
behavioral2/memory/3964-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4076-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3964-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00070000000231ea-13.dat	CryptoLocker_set1
behavioral2/memory/3964-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4076-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3964-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00070000000231ea-13.dat	UPX
behavioral2/memory/3964-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4076-25-0x0000000000500000-0x0000000000510000-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-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	2024-02-19_e4334cbfdb9dcd93fa0b6654c28d2001_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4076	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3964-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00070000000231ea-13.dat	upx
behavioral2/memory/3964-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4076-25-0x0000000000500000-0x0000000000510000-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 3964 wrote to memory of 4076	3964	2024-02-19_e4334cbfdb9dcd93fa0b6654c28d2001_cryptolocker.exe	83
PID 3964 wrote to memory of 4076	3964	2024-02-19_e4334cbfdb9dcd93fa0b6654c28d2001_cryptolocker.exe	83
PID 3964 wrote to memory of 4076	3964	2024-02-19_e4334cbfdb9dcd93fa0b6654c28d2001_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-02-19_e4334cbfdb9dcd93fa0b6654c28d2001_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-19_e4334cbfdb9dcd93fa0b6654c28d2001_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3964
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4076

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
56KB

MD5
20e6a60f5adb9c4ceb024c8b8096f7e9

SHA1
71b630230756e0fc14a8f33681bc62fae8423896

SHA256
188cf77bd72ac7a0e874af82ac55f62c8117227267b78a5feb78a94485106eae

SHA512
b9a2b1fbab3263141069459e5a5cb30b9bf2e425025cdda8b8f3144beeda74c001bded160d5446d0b34bb75ae472aa1263d9f8df7236ad4dcc1e7057595e3e96

Download Submit
memory/3964-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3964-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3964-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3964-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3964-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4076-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download