6da6bcdffe1b16b5ef4fde6e1054238e45e9b4d259bfe90fbcde4582c5bb4f24

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
24/04/2024, 17:52

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General

Target

2024-04-24_a8201ab09ccf4f136a29c0487b8f7b09_cryptolocker.exe
Size

52KB
MD5

a8201ab09ccf4f136a29c0487b8f7b09
SHA1

e8fbc64d19868c144a30946190f6ff06b573e54e
SHA256

6da6bcdffe1b16b5ef4fde6e1054238e45e9b4d259bfe90fbcde4582c5bb4f24
SHA512

8a254f2ff85e4de02f8482410660ab0cf2062241b07a415cbc518dd7673538622a6e756c9e4766c0bfa7bb0d92acc04b09c9165c562eb256758e3c861be0e5d1
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTOeV:z6QFElP6n+gKmddpMOtEvwDpj31ieV

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4404-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e97a-13.dat	CryptoLocker_rule2
behavioral2/memory/4404-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1112-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4404-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001e97a-13.dat	CryptoLocker_set1
behavioral2/memory/4404-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1112-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4404-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000300000001e97a-13.dat	UPX
behavioral2/memory/4404-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1112-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation	2024-04-24_a8201ab09ccf4f136a29c0487b8f7b09_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1112	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4404-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000300000001e97a-13.dat	upx
behavioral2/memory/4404-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1112-26-0x0000000000500000-0x0000000000510000-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 4404 wrote to memory of 1112	4404	2024-04-24_a8201ab09ccf4f136a29c0487b8f7b09_cryptolocker.exe	84
PID 4404 wrote to memory of 1112	4404	2024-04-24_a8201ab09ccf4f136a29c0487b8f7b09_cryptolocker.exe	84
PID 4404 wrote to memory of 1112	4404	2024-04-24_a8201ab09ccf4f136a29c0487b8f7b09_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-04-24_a8201ab09ccf4f136a29c0487b8f7b09_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-24_a8201ab09ccf4f136a29c0487b8f7b09_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4404
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1112

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
52KB

MD5
e826ab98e8ba44954d51828fe05fc08c

SHA1
382b3b522740786a7b4807d37fa6eea05bb2ca0e

SHA256
1e275205571830ef5ac4e6ad91bf8fec5bd5273acddbfffd4d9089396a67a2ef

SHA512
3f2f3240d46c7cf8e4e0e5860ee602ecd17c4127cb6b6853d3aa5092f744131507fb11c5189d77d3a164018930f0a22e97752d25bdcee54df3a9d5595915b78d

Download Submit
memory/1112-19-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/1112-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1112-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4404-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4404-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4404-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4404-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4404-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download