00e91ab4101ccd71717174788b3888a353212d80c53c4142e0bf192da958b30e

Analysis

max time kernel
149s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
26/01/2024, 20:41

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General

Target

2024-01-26_c5627736a89501ed8fe2ce7677d49f2f_cryptolocker.exe
Size

55KB
MD5

c5627736a89501ed8fe2ce7677d49f2f
SHA1

2d4b18f83ea30f729e01ffb5ee47ad5917b546c6
SHA256

00e91ab4101ccd71717174788b3888a353212d80c53c4142e0bf192da958b30e
SHA512

974a6728029683b3691ff63510b143c3e1781f22d8317612d6a96ebc75e909cb312fd6245532b1c33c163adc64b6a1a8f296fe7011bc2239abfce84fe456c582
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5axc91:z6QFElP6n+gKmddpMOtEvwDpj9aYau

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1800-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000023216-13.dat	CryptoLocker_rule2
behavioral2/memory/1800-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1724-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1724-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/1800-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0006000000023216-13.dat	CryptoLocker_set1
behavioral2/memory/1800-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1724-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1724-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1800-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0006000000023216-13.dat	UPX
behavioral2/memory/1800-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1724-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1724-27-0x0000000000500000-0x0000000000510000-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-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation	2024-01-26_c5627736a89501ed8fe2ce7677d49f2f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1724	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1800-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0006000000023216-13.dat	upx
behavioral2/memory/1800-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1724-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1724-27-0x0000000000500000-0x0000000000510000-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 1800 wrote to memory of 1724	1800	2024-01-26_c5627736a89501ed8fe2ce7677d49f2f_cryptolocker.exe	88
PID 1800 wrote to memory of 1724	1800	2024-01-26_c5627736a89501ed8fe2ce7677d49f2f_cryptolocker.exe	88
PID 1800 wrote to memory of 1724	1800	2024-01-26_c5627736a89501ed8fe2ce7677d49f2f_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-01-26_c5627736a89501ed8fe2ce7677d49f2f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-26_c5627736a89501ed8fe2ce7677d49f2f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1800
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1724

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
55KB

MD5
0cc88dfca45db83dd2b4d0e3cdd1ec02

SHA1
fadd81af4767f559e6c5136fd87ccf51566753e2

SHA256
fdf58e159ca0325f32abc369d2849a00d8372bc3c0166a1bf231376f1d67b147

SHA512
10681b86aedc992b70894e020d2935be2c49dde6b556346e17812c8d901e68b199efe2964a5b82f5f72d3d5f9eefa0dcab67550f387027808c1f5dc37f308f36

Download Submit
memory/1724-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1724-24-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/1724-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1800-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1800-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1800-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1800-3-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/1800-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download