a599b4aa7342c97a9ceb8026aa86336f3fa3b4567117076d71cca7890fd7f722

Analysis

max time kernel
4s
max time network
40s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/02/2024, 20:51

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General

Target

2024-02-28_c76bfd8695c05443135fd5310898691f_cryptolocker.exe
Size

50KB
MD5

c76bfd8695c05443135fd5310898691f
SHA1

3c1430494098f5a52602169e81db563d601191e0
SHA256

a599b4aa7342c97a9ceb8026aa86336f3fa3b4567117076d71cca7890fd7f722
SHA512

b3f462864aed882a5a9cbee336b428d0a4ff917c453c79fb3892dd663aad34cc3659bf13b1461339c720119d4fc55eec0b96e1ea93c7acb291295ebb68c32a67
SSDEEP

768:79inqyNR/QtOOtEvwDpjBK/rJ+Nw8qnUCNs:79mqyNhQMOtEvwDpjBxe8xCNs

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 2 IoCs

resource	yara_rule
behavioral2/memory/904-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00080000000231fd-13.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/904-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00080000000231fd-13.dat	CryptoLocker_set1

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-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\International\Geo\Nation	2024-02-28_c76bfd8695c05443135fd5310898691f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4036	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 904 wrote to memory of 4036	904	2024-02-28_c76bfd8695c05443135fd5310898691f_cryptolocker.exe	89
PID 904 wrote to memory of 4036	904	2024-02-28_c76bfd8695c05443135fd5310898691f_cryptolocker.exe	89
PID 904 wrote to memory of 4036	904	2024-02-28_c76bfd8695c05443135fd5310898691f_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-02-28_c76bfd8695c05443135fd5310898691f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-28_c76bfd8695c05443135fd5310898691f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:904
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4036

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
50KB

MD5
6c10684699de37df307ac8d4aedace8c

SHA1
9f657fc45472b3b6555d02f053d2065458d60508

SHA256
03c9caa0eaee145286ffcd59529f943abd578d308fc677cc2217511e9adad12e

SHA512
acec8611c185380094c011b0be0e1703f8e1c34662391338482498ad0c25b63fb08eddb9415950d93e6a97a61587971646fe37e70796f732bf626f24288eeec1

Download Submit
memory/904-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/904-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/904-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/904-3-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download