3a2d54a2ee7740c04c1e5c4ce7d225ce70365dee737575fa932746bf34ea23c4

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 00:45

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General

Target

2024-05-23_aad4a88c8aeb9f7b8ed9bc07538eba37_cryptolocker.exe
Size

64KB
MD5

aad4a88c8aeb9f7b8ed9bc07538eba37
SHA1

5e875e578c2e4389cc218c990fd1678b58f61d1d
SHA256

3a2d54a2ee7740c04c1e5c4ce7d225ce70365dee737575fa932746bf34ea23c4
SHA512

63e248486d8b0cea198ed8ab17aecb1a965440d8cda278379c09acc585cbc67df588838bc529724e3c023422a176a6d6dba0f2b8110018ab5f9aef9e394af185
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsih:BbdDmjr+OtEvwDpjM8Q

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1792-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/1792-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4924-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1792-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4924-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1792-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/1792-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4924-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-23_aad4a88c8aeb9f7b8ed9bc07538eba37_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-23_aad4a88c8aeb9f7b8ed9bc07538eba37_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4924 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4924	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-23_aad4a88c8aeb9f7b8ed9bc07538eba37_cryptolocker.exe

description	pid	process	target process
PID 1792 wrote to memory of 4924	1792	2024-05-23_aad4a88c8aeb9f7b8ed9bc07538eba37_cryptolocker.exe	asih.exe
PID 1792 wrote to memory of 4924	1792	2024-05-23_aad4a88c8aeb9f7b8ed9bc07538eba37_cryptolocker.exe	asih.exe
PID 1792 wrote to memory of 4924	1792	2024-05-23_aad4a88c8aeb9f7b8ed9bc07538eba37_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_aad4a88c8aeb9f7b8ed9bc07538eba37_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_aad4a88c8aeb9f7b8ed9bc07538eba37_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1792

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4924

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
64KB

MD5
30b878db4cb9c0dd10020862da157ab1

SHA1
a1929d73df73c3e65571a0ff091379d3fb48a0bf

SHA256
2bac15dc3971162d4468f4d97b2810e585077c4bda3163ece3a19eb4bd225e51

SHA512
b8e7499aebf4238b5f9bb5a7bc3aa663a7b328dad8ee2158c0f24bc7ca4a43283990142d05bf1865b8f97aa813f6515f4f726ccdbd20d08c6eb449a56cb4b98c

Download Submit
memory/1792-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1792-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1792-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1792-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/1792-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4924-20-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/4924-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download