4fb0ca8b8b260a4626ae9e5ceb82aec0819fe4df8f63dc85af916cde33fdafe7

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
22/02/2024, 00:53

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General

Target

2024-02-22_d1fd0c6ae0c15e653051adee2184b0d5_cryptolocker.exe
Size

58KB
MD5

d1fd0c6ae0c15e653051adee2184b0d5
SHA1

996a4b078bf116d93e9101ab3da81c1335794a9f
SHA256

4fb0ca8b8b260a4626ae9e5ceb82aec0819fe4df8f63dc85af916cde33fdafe7
SHA512

c336299d4a2941361741a7ab2e17739d449c31a471ffbe017f12db19f91d1a0a2ae5b5e3961c967b77597b40328b398c7f0004f92b539d0defa50b2752aefbe5
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5appOq0r7p:z6QFElP6n+gKmddpMOtEvwDpj9aYalW

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1600-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000231e8-13.dat	CryptoLocker_rule2
behavioral2/memory/1600-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/564-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/564-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/1600-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00070000000231e8-13.dat	CryptoLocker_set1
behavioral2/memory/1600-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/564-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/564-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1600-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00070000000231e8-13.dat	UPX
behavioral2/memory/1600-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/564-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/564-27-0x0000000000500000-0x0000000000510000-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-1-5-21-3054445511-921769590-4013668107-1000\Control Panel\International\Geo\Nation	2024-02-22_d1fd0c6ae0c15e653051adee2184b0d5_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
564	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1600-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00070000000231e8-13.dat	upx
behavioral2/memory/1600-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/564-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/564-27-0x0000000000500000-0x0000000000510000-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 1600 wrote to memory of 564	1600	2024-02-22_d1fd0c6ae0c15e653051adee2184b0d5_cryptolocker.exe	84
PID 1600 wrote to memory of 564	1600	2024-02-22_d1fd0c6ae0c15e653051adee2184b0d5_cryptolocker.exe	84
PID 1600 wrote to memory of 564	1600	2024-02-22_d1fd0c6ae0c15e653051adee2184b0d5_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-22_d1fd0c6ae0c15e653051adee2184b0d5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-22_d1fd0c6ae0c15e653051adee2184b0d5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1600
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:564

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
58KB

MD5
24cf07830c85282d622faa1fdc721105

SHA1
4c4ecb957e79eb340ca3a199e3be1d4581c0bd5e

SHA256
eaec04bfacaeb175cab0ed952fe509f246e1c93109ad07312461477a4337203a

SHA512
4b8253e89aa72fb257363eb1ed0f311b5cb021bef994b34090cebd7c84f3bf7435285024c1997e19835c3921c1c68df330898b863ee7de09570b5107b5956f00

Download Submit
memory/564-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/564-20-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/564-26-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/564-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1600-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1600-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1600-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1600-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1600-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download