8fb7d7ef007bfe072a643b0cfa64284675eb02fb6625fce29e9944af41647705

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
05/03/2024, 16:44

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-03-05_2abd82b8ab38009133eaa7152a8ca526_cryptolocker.exe
Size

46KB
MD5

2abd82b8ab38009133eaa7152a8ca526
SHA1

21cd60800c62e4af8a9ff3eac41d06f77a6270c7
SHA256

8fb7d7ef007bfe072a643b0cfa64284675eb02fb6625fce29e9944af41647705
SHA512

595c8e08505101bc23d5634d50bcabfdee25bd7cd4baf324f614d767d4054e29d51b54def64cbac925417c659abb8ea0aae9943e82e13f9ec56d5a5b98677a94
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05WTB+:qmbhXDmjr5MOtEvwDpj5cDtKkQZQ6U

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/5056-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000001ebc7-13.dat	CryptoLocker_rule2
behavioral2/memory/4472-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5056-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4472-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4472-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5056-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4472-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/5056-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000700000001ebc7-13.dat	UPX
behavioral2/memory/4472-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5056-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4472-27-0x0000000000500000-0x0000000000510000-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-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation	2024-03-05_2abd82b8ab38009133eaa7152a8ca526_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4472	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 5056 wrote to memory of 4472	5056	2024-03-05_2abd82b8ab38009133eaa7152a8ca526_cryptolocker.exe	89
PID 5056 wrote to memory of 4472	5056	2024-03-05_2abd82b8ab38009133eaa7152a8ca526_cryptolocker.exe	89
PID 5056 wrote to memory of 4472	5056	2024-03-05_2abd82b8ab38009133eaa7152a8ca526_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-03-05_2abd82b8ab38009133eaa7152a8ca526_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-05_2abd82b8ab38009133eaa7152a8ca526_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5056
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4472

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
47KB

MD5
8e6d35c3edb3a59d2dc182dd7bb7d206

SHA1
da7b66eaa46451972f446a4c8a2b61cbd8a9829a

SHA256
cd3196d826d1f7a0e43ce2510102d33c0594391aefe6e56c2c4244a4eca26dae

SHA512
e456c1b43a752e09f1b59ff4afeb38806d1b9e76e207f69f7af41ac1da7cf9ca617b9b3b99372eeed6c4a9b53defd3ad182a4d5f46d3a4dc95493c285c0a2cc0

Download Submit
memory/4472-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4472-20-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/4472-23-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4472-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5056-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5056-1-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/5056-2-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/5056-3-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/5056-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download