d1743549423b83eea8561b39e178d4dde85f37340d57d164e8adabe391933d71

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
04/05/2024, 20:15

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General

Target

2024-05-04_be31d9b74f3a8069072de65c25af5a09_cryptolocker.exe
Size

38KB
MD5

be31d9b74f3a8069072de65c25af5a09
SHA1

9e153b30cdf6499950ac2d071d4f049c49787a2d
SHA256

d1743549423b83eea8561b39e178d4dde85f37340d57d164e8adabe391933d71
SHA512

77f8de7763ea926fd38e49bc209066af2e2d5d707a387f9dbc43621f19a7789df08e7a0011ed3b50592643acd2559654857765f8a61200fe94636fc56303e7c8
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY8:qDdFJy3QMOtEvwDpjjWMl7Tx

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3904-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000d000000023b24-13.dat	CryptoLocker_rule2
behavioral2/memory/3904-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2832-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2832-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3904-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000d000000023b24-13.dat	CryptoLocker_set1
behavioral2/memory/3904-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2832-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2832-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3904-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000d000000023b24-13.dat	UPX
behavioral2/memory/3904-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2832-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2832-27-0x0000000000500000-0x0000000000510000-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-1-5-21-2860750803-256193626-1801997576-1000\Control Panel\International\Geo\Nation	2024-05-04_be31d9b74f3a8069072de65c25af5a09_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2832	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3904-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000d000000023b24-13.dat	upx
behavioral2/memory/3904-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2832-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2832-27-0x0000000000500000-0x0000000000510000-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 3904 wrote to memory of 2832	3904	2024-05-04_be31d9b74f3a8069072de65c25af5a09_cryptolocker.exe	83
PID 3904 wrote to memory of 2832	3904	2024-05-04_be31d9b74f3a8069072de65c25af5a09_cryptolocker.exe	83
PID 3904 wrote to memory of 2832	3904	2024-05-04_be31d9b74f3a8069072de65c25af5a09_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-04_be31d9b74f3a8069072de65c25af5a09_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-04_be31d9b74f3a8069072de65c25af5a09_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3904
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2832

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
39KB

MD5
c31467e9b71025306efcda7ac077b154

SHA1
6fceba3f46823f01f5e461fbfe922114e5e3815f

SHA256
b0525cce069e6f22ce1dae95eafd9310e827f8eba9637d01c1a81af2e3a6c02a

SHA512
11d4604357ca72ed064ec4f63f4515eae211c6dea6712a9cca792456717a7a1f2fb88530b35b4f0389529d85d9a94c4b20eb1c5e626ce163c5b920fe71e81029

Download Submit
memory/2832-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2832-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2832-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2832-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3904-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3904-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3904-2-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/3904-9-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3904-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download