7e10bd0e773a19d07d5f7a915ea658bbf0ad8de095c40a15b1006ce4145f4733

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
13/06/2024, 04:36

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General

Target

2024-06-13_f5a3c358d31378dfdab44fbfff59fdc5_cryptolocker.exe
Size

54KB
MD5

f5a3c358d31378dfdab44fbfff59fdc5
SHA1

7e1b83f9e1c906df6a0dc8ac0cb2f37ae9538746
SHA256

7e10bd0e773a19d07d5f7a915ea658bbf0ad8de095c40a15b1006ce4145f4733
SHA512

ce5edffb97bcb4ef31f46729563761fa641b053858e8fb4e1d2761523cb438f071f0fd57739cfb564e45a4e5cbb606cffcc95f6babaf94474932ed3dc5131321
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOXX8:bODOw9acifAoc+vn

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/2972-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000022f51-13.dat	CryptoLocker_rule2
behavioral2/memory/4540-16-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2972-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4540-27-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/2972-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/files/0x0008000000022f51-13.dat	UPX
behavioral2/memory/4540-16-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/2972-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/4540-27-0x0000000008000000-0x000000000800F000-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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-06-13_f5a3c358d31378dfdab44fbfff59fdc5_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4540	lossy.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2972-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/files/0x0008000000022f51-13.dat	upx
behavioral2/memory/4540-16-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/2972-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/4540-27-0x0000000008000000-0x000000000800F000-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 2972 wrote to memory of 4540	2972	2024-06-13_f5a3c358d31378dfdab44fbfff59fdc5_cryptolocker.exe	82
PID 2972 wrote to memory of 4540	2972	2024-06-13_f5a3c358d31378dfdab44fbfff59fdc5_cryptolocker.exe	82
PID 2972 wrote to memory of 4540	2972	2024-06-13_f5a3c358d31378dfdab44fbfff59fdc5_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-06-13_f5a3c358d31378dfdab44fbfff59fdc5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-13_f5a3c358d31378dfdab44fbfff59fdc5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2972
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:4540

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\lossy.exe

Filesize
54KB

MD5
6efc0439113ea056fe0860e7caf902d9

SHA1
29daa2631fd035e763e6f912b3cf91c89e0dfd5f

SHA256
6a7fca52d3c758ca3a4457a9c701fefa919c940c43ae0dabe04d7ca7e483b51a

SHA512
597ad87eb05451f0e84b33651b5090366d459dc1a0dc5c30779afc0dd365c2d4eb58f1a89dfb80f2206fb0aa046bee68df51aee44171b84e4a6feb8c99a5f6e2

Download Submit
memory/2972-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2972-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2972-2-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/2972-9-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2972-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/4540-16-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/4540-26-0x0000000001FD0000-0x0000000001FD6000-memory.dmp

Filesize
24KB

Download
memory/4540-27-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download