d4fcc9b1ec47a0323c79379c57ac82092b9edf18e8cdbea6f6fb3e693ce3032b

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
18/01/2024, 22:35

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target

2024-01-18_2decd72c5c1751d21ab7935ca3f7e694_cryptolocker.exe
Size

61KB
MD5

2decd72c5c1751d21ab7935ca3f7e694
SHA1

4560da44cd596e80871f249ffbdbb616a2cb5687
SHA256

d4fcc9b1ec47a0323c79379c57ac82092b9edf18e8cdbea6f6fb3e693ce3032b
SHA512

4d746b5c8a6b87a05b8f942539a24a26260e782e0785320e2e51327304c0b805a59df757eca18d61701234c4da3b419515dac0c5e2fb20d6df2cd2800fc802d1
SSDEEP

768:P8mnjO6LsoEEeegiZPvEhHSG+gbum/kLyMro2GtOOtEvwDpjKvWxHCbSVaFn0jKv:P8mnK6QFElP6n+gymddpMOtEvwDpjYp

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1028-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0010000000023155-13.dat	CryptoLocker_rule2
behavioral2/memory/1028-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3464-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1028-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0010000000023155-13.dat	CryptoLocker_set1
behavioral2/memory/1028-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/3464-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1028-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0010000000023155-13.dat	UPX
behavioral2/memory/1028-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/3464-26-0x0000000000500000-0x000000000050F311-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-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation	2024-01-18_2decd72c5c1751d21ab7935ca3f7e694_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3464	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1028-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0010000000023155-13.dat	upx
behavioral2/memory/1028-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/3464-26-0x0000000000500000-0x000000000050F311-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 1028 wrote to memory of 3464	1028	2024-01-18_2decd72c5c1751d21ab7935ca3f7e694_cryptolocker.exe	89
PID 1028 wrote to memory of 3464	1028	2024-01-18_2decd72c5c1751d21ab7935ca3f7e694_cryptolocker.exe	89
PID 1028 wrote to memory of 3464	1028	2024-01-18_2decd72c5c1751d21ab7935ca3f7e694_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-01-18_2decd72c5c1751d21ab7935ca3f7e694_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-18_2decd72c5c1751d21ab7935ca3f7e694_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1028
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3464

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
61KB

MD5
86e3208008bad048dfb4d4ecc9310976

SHA1
0f361bc3d855ef61d4844783d376df9193583da2

SHA256
5b1da7ece2eef5ec740b128bb0217f950488b07b4030bfddb6858cf0face26d1

SHA512
0f4608aa55bf6e31598affc6f60ffa907cdd46c306af758b9474a7393ab75aaa1bce22be3fe73edb8915e66fa75800509516e7ce3c10686a06af8426e2b7f736

Download Submit
memory/1028-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1028-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1028-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1028-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/1028-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3464-19-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/3464-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3464-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download