f9d777135947b48bc5b5e4a91a08d351a35c3f746234c5c55e64b02e0fefaa23

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
11-06-2024 06:26

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General

Target

2024-06-11_50fee36ccbc9a9ef4614035256602050_cryptolocker.exe
Size

52KB
MD5

50fee36ccbc9a9ef4614035256602050
SHA1

ce64ff85c1e350ee28fef53a0ec80c197bc8e9f8
SHA256

f9d777135947b48bc5b5e4a91a08d351a35c3f746234c5c55e64b02e0fefaa23
SHA512

f46c2ceaa79d279f0f8370f7a2065ebb135785a0ad75901e37e33588d3a7a07cf854bc6042358552f23e10b99bc93a96b1d2a92167fe26854b8ec3b2f1962a7d
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtO7:bODOw9acifAoc+v4

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/636-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00090000000233fd-13.dat	CryptoLocker_rule2
behavioral2/memory/636-18-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5020-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5020-27-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/636-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/files/0x00090000000233fd-13.dat	UPX
behavioral2/memory/636-18-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/5020-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/5020-27-0x0000000008000000-0x000000000800F000-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-06-11_50fee36ccbc9a9ef4614035256602050_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5020	lossy.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/636-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/files/0x00090000000233fd-13.dat	upx
behavioral2/memory/636-18-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/5020-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/5020-27-0x0000000008000000-0x000000000800F000-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 636 wrote to memory of 5020	636	2024-06-11_50fee36ccbc9a9ef4614035256602050_cryptolocker.exe	81
PID 636 wrote to memory of 5020	636	2024-06-11_50fee36ccbc9a9ef4614035256602050_cryptolocker.exe	81
PID 636 wrote to memory of 5020	636	2024-06-11_50fee36ccbc9a9ef4614035256602050_cryptolocker.exe	81

C:\Users\Admin\AppData\Local\Temp\2024-06-11_50fee36ccbc9a9ef4614035256602050_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-11_50fee36ccbc9a9ef4614035256602050_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:636
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:5020

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
52KB

MD5
64a6aa33328616162f8ebc1d26571b99

SHA1
01d039a86705e62f55a7777a37c6ac62167da927

SHA256
a1cb4023348373ea56b404511027ca524e3d92317f8b748ae545ae32ee26cfbd

SHA512
4ac4408a7672164067c498035421aabeb8308979cc10d5fb7df5d644efbf65b87b0047bfed0ff932fbf62417600848b18595f00209a343d71bdd64d079494829

Download Submit
memory/636-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/636-1-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/636-2-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/636-9-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/636-18-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/5020-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/5020-20-0x0000000001F60000-0x0000000001F66000-memory.dmp

Filesize
24KB

Download
memory/5020-26-0x0000000001F40000-0x0000000001F46000-memory.dmp

Filesize
24KB

Download
memory/5020-27-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download