12d132c7253f96e4342555872b8d6267b5e79217fcb45d2c452ac17ddd7b5766

Analysis

max time kernel
146s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
20/03/2024, 00:27

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-03-20_18fb9c687eb96fe322d98b8cf494aedf_cryptolocker.exe
Size

87KB
MD5

18fb9c687eb96fe322d98b8cf494aedf
SHA1

538a7483c388f971ad88365e0155ee4acfc32207
SHA256

12d132c7253f96e4342555872b8d6267b5e79217fcb45d2c452ac17ddd7b5766
SHA512

3e548a287083d9d8ffcec2bb10789ae19300cf7719140cf6683ee3b7e2257827f0429d8a748aa7bf3c3083049a87d12770c984458b3cca72f7351c925ddf1601
SSDEEP

768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtISEz:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgq

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/5088-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000022745-13.dat	CryptoLocker_rule2
behavioral2/memory/5088-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3320-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/5088-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000022745-13.dat	CryptoLocker_set1
behavioral2/memory/5088-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3320-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/5088-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0008000000022745-13.dat	UPX
behavioral2/memory/5088-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3320-25-0x0000000000500000-0x000000000050F000-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	2024-03-20_18fb9c687eb96fe322d98b8cf494aedf_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3320	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5088-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0008000000022745-13.dat	upx
behavioral2/memory/5088-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3320-25-0x0000000000500000-0x000000000050F000-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 5088 wrote to memory of 3320	5088	2024-03-20_18fb9c687eb96fe322d98b8cf494aedf_cryptolocker.exe	89
PID 5088 wrote to memory of 3320	5088	2024-03-20_18fb9c687eb96fe322d98b8cf494aedf_cryptolocker.exe	89
PID 5088 wrote to memory of 3320	5088	2024-03-20_18fb9c687eb96fe322d98b8cf494aedf_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-03-20_18fb9c687eb96fe322d98b8cf494aedf_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-20_18fb9c687eb96fe322d98b8cf494aedf_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5088
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3320

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
87KB

MD5
0218e43691ff3f285c8cc08b6199a5f3

SHA1
dc0d3f9e8fafbe5ae6482f2026d69857e54a0f14

SHA256
75be8e2cbf7b0de79d11ca164181d2f281340559d24653d3b914f8b52dfc0e25

SHA512
1311c92693a702f465335fa4f8b29d63d2c3285468e65971281440f2afeb1db34d560c28615b3f1a1f73c147747e8143ad6a9088e687942a2ec2aca495179179

Download Submit
memory/3320-25-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/5088-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/5088-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5088-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5088-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/5088-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download