4dc404f515009bb71a872b5af70b3216c61a004a8f381eeed9f2f1e858d39a82

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
26/03/2024, 04:02

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General

Target

2024-03-26_dfa1e903dee9e210869a60ca70b2eaeb_cryptolocker.exe
Size

61KB
MD5

dfa1e903dee9e210869a60ca70b2eaeb
SHA1

5e0436c4c91900c7425da5da0e6716387ca7e228
SHA256

4dc404f515009bb71a872b5af70b3216c61a004a8f381eeed9f2f1e858d39a82
SHA512

4d3780d7a2766c122c63e1a8ca5bbe59f5ad32046e721d65a25b1d980ecb5705b009c0817d0d676d58bc9a46201737b29ca7d5d3b5af00fe299a9c3f85a8c6ee
SSDEEP

768:T6LsoEEeegiZPvEhHSG+gkum/kLyMro2GtOOtEvwDpjhXMLamkc8J59l:T6QFElP6n+gxmddpMOtEvwDpjwa39l

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2244-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00080000000231f7-13.dat	CryptoLocker_rule2
behavioral2/memory/2244-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4296-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2244-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00080000000231f7-13.dat	CryptoLocker_set1
behavioral2/memory/2244-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4296-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2244-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00080000000231f7-13.dat	UPX
behavioral2/memory/2244-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4296-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2024-03-26_dfa1e903dee9e210869a60ca70b2eaeb_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4296	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2244-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00080000000231f7-13.dat	upx
behavioral2/memory/2244-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4296-26-0x0000000000500000-0x0000000000510000-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 2244 wrote to memory of 4296	2244	2024-03-26_dfa1e903dee9e210869a60ca70b2eaeb_cryptolocker.exe	85
PID 2244 wrote to memory of 4296	2244	2024-03-26_dfa1e903dee9e210869a60ca70b2eaeb_cryptolocker.exe	85
PID 2244 wrote to memory of 4296	2244	2024-03-26_dfa1e903dee9e210869a60ca70b2eaeb_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-03-26_dfa1e903dee9e210869a60ca70b2eaeb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-26_dfa1e903dee9e210869a60ca70b2eaeb_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2244
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4296

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
61KB

MD5
b628f41eebba3b6eb3b753e18e7a75a3

SHA1
e717e9f6388f6a90b6f20216081fe0b6721c8ec8

SHA256
61b13cf8cb109180d3bc1e73d2c155e3e8ddbb2dc363464bbd0b4f6f0c8eaff6

SHA512
aeef63e8a1a622438de55e9021374e38055f198bedb4aa6ce35af6c07e9d1e2842c4fe91b0f0d38fbadef68cf664b5279bae79d878d32e33c0df18dd3815429c

Download Submit
memory/2244-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2244-1-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/2244-2-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/2244-3-0x0000000002230000-0x0000000002236000-memory.dmp

Filesize
24KB

Download
memory/2244-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4296-19-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/4296-21-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4296-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download