045d0469c1723ad55fa8a473794df255bb5e27a722020de9ed1fad2627cf4a71

Analysis

max time kernel
150s
max time network
159s
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, 15:04

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General

Target

2024-03-05_a135a964c95dd7348433d012365d95a9_cryptolocker.exe
Size

109KB
MD5

a135a964c95dd7348433d012365d95a9
SHA1

0e2d5903b52f00179d0f9557ec06d419c4873498
SHA256

045d0469c1723ad55fa8a473794df255bb5e27a722020de9ed1fad2627cf4a71
SHA512

fdbe73075c4532184eac97231744e8254c9073317cb36a76a1bde9da723df55b54fdda47a79dc9a2b09add301d6eea6a55b425075e8ec1a5be7a00330f3da8f5
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwMg8G+:z6a+CdOOtEvwDpjczk

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4392-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000200000001f656-13.dat	CryptoLocker_rule2
behavioral2/memory/4392-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3328-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3328-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4392-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000200000001f656-13.dat	CryptoLocker_set1
behavioral2/memory/4392-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3328-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3328-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4392-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000200000001f656-13.dat	UPX
behavioral2/memory/4392-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3328-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3328-27-0x0000000000500000-0x0000000000510000-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-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	2024-03-05_a135a964c95dd7348433d012365d95a9_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3328	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4392-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000200000001f656-13.dat	upx
behavioral2/memory/4392-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3328-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3328-27-0x0000000000500000-0x0000000000510000-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 4392 wrote to memory of 3328	4392	2024-03-05_a135a964c95dd7348433d012365d95a9_cryptolocker.exe	90
PID 4392 wrote to memory of 3328	4392	2024-03-05_a135a964c95dd7348433d012365d95a9_cryptolocker.exe	90
PID 4392 wrote to memory of 3328	4392	2024-03-05_a135a964c95dd7348433d012365d95a9_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-03-05_a135a964c95dd7348433d012365d95a9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-05_a135a964c95dd7348433d012365d95a9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4392
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3328

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
109KB

MD5
8ca1d5e4a7fb5c1aaa04e0eb3696da0f

SHA1
f373025912a32aac924c2c7e66b350d9e15e5c81

SHA256
a508eb7c3d7bc5fd7d08dcf370215698982426b90508bcd4d04183e808696ac2

SHA512
5707f15cc8b135c1d6a74a100d63a9324dc70cf62cac0f30d7c46d1cddd15d7dd8942c6e5b74f843813551f0b9ec19b3437a58794b19e2f7490e329694c73528

Download Submit
memory/3328-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3328-20-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/3328-23-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3328-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4392-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4392-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/4392-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/4392-3-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/4392-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download