62d435aed54f22fdfc63ba967ee3d97ff2ab001a5cd84c55a09fd171107b160d

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/03/2024, 04:47

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General

Target

2024-03-28_999e49e3d337a40945561bbd0673a5ad_cryptolocker.exe
Size

31KB
MD5

999e49e3d337a40945561bbd0673a5ad
SHA1

354b836a1932858c9ed898591c5077fd1b1c0035
SHA256

62d435aed54f22fdfc63ba967ee3d97ff2ab001a5cd84c55a09fd171107b160d
SHA512

981d8bde33cf45a22c144a9458d53e120467a31d4c79d14538177eab60ac792aa010914eb92c30d56b33797cd5bacd72aef717c5d521129989c1345faaf048c6
SSDEEP

768:q0ZziOWwULueOSdE8tOOtEvwDpjeWaJIOc+4tHh:q0zizzOSxMOtEvwDpj/arqB

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3188-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023200-13.dat	CryptoLocker_rule2
behavioral2/memory/3188-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4536-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/3188-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4536-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3188-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023200-13.dat	UPX
behavioral2/memory/3188-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4536-26-0x0000000000500000-0x0000000000510000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation	2024-03-28_999e49e3d337a40945561bbd0673a5ad_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4536	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 3188 wrote to memory of 4536	3188	2024-03-28_999e49e3d337a40945561bbd0673a5ad_cryptolocker.exe	88
PID 3188 wrote to memory of 4536	3188	2024-03-28_999e49e3d337a40945561bbd0673a5ad_cryptolocker.exe	88
PID 3188 wrote to memory of 4536	3188	2024-03-28_999e49e3d337a40945561bbd0673a5ad_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-03-28_999e49e3d337a40945561bbd0673a5ad_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-28_999e49e3d337a40945561bbd0673a5ad_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3188
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4536

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
31KB

MD5
977413513530358fa9b20c4ee0367dc0

SHA1
779580bc371a43e2f80de345b63b421d501e94a8

SHA256
6b14b314f71670fa03179b880bfc01c9048e1ad20209ad1086d257f55c8d9fa8

SHA512
38c80f3832a77b65d6422ef789ac7b86e04701129c8e7e2b56bcf05306a88c057b8f3810733f84914949797abd855b871fd265fa9471517d24e124997dfc7664

Download Submit
memory/3188-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3188-1-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/3188-2-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/3188-3-0x0000000000810000-0x0000000000816000-memory.dmp

Filesize
24KB

Download
memory/3188-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4536-19-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4536-21-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4536-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download