b89013bdc8a7bdb2d850f9df28b24fa51d92c4ef7bd37c5df4159d0b7e200b7b

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
03/06/2024, 04:29

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General

Target

2024-06-03_65f24d49d4a1c8cdb982525360b4fc64_cryptolocker.exe
Size

35KB
MD5

65f24d49d4a1c8cdb982525360b4fc64
SHA1

c45a6f1be10b591a4c6b18d714c4f7dd438a5ae8
SHA256

b89013bdc8a7bdb2d850f9df28b24fa51d92c4ef7bd37c5df4159d0b7e200b7b
SHA512

89af6a9668827f2906e485314db1c7972fda8173185623b0223f8e4d95b168e139eda0c611441b891923bb989057825093eeefcbe86a73b8658a5db7e5174ff6
SSDEEP

768:bFPm5zusFUB2preAr+Ofjg0S16avdrQFiLjJvtXa:bFPmpiif/oc+vXa

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/212-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000900000002328e-13.dat	CryptoLocker_rule2
behavioral2/memory/212-18-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/372-19-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/372-28-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/212-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/files/0x000900000002328e-13.dat	UPX
behavioral2/memory/212-18-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/372-19-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/372-28-0x0000000008000000-0x000000000800E000-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	2024-06-03_65f24d49d4a1c8cdb982525360b4fc64_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
372	lossy.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/212-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/files/0x000900000002328e-13.dat	upx
behavioral2/memory/212-18-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/372-19-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/372-28-0x0000000008000000-0x000000000800E000-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 212 wrote to memory of 372	212	2024-06-03_65f24d49d4a1c8cdb982525360b4fc64_cryptolocker.exe	83
PID 212 wrote to memory of 372	212	2024-06-03_65f24d49d4a1c8cdb982525360b4fc64_cryptolocker.exe	83
PID 212 wrote to memory of 372	212	2024-06-03_65f24d49d4a1c8cdb982525360b4fc64_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-06-03_65f24d49d4a1c8cdb982525360b4fc64_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_65f24d49d4a1c8cdb982525360b4fc64_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:212
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:372

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
35KB

MD5
84997313a51a04969098284256d8f02f

SHA1
740a0d183eaf3517a8bf08fe4a72b5ae021ea1ca

SHA256
863bd9e9e0fcf89a591d011f3a9154cb7f3c42c032120518ef52ce464ab42e6e

SHA512
56e144297584fd0fbcb39fcb8484fdad5d41935e3e154ca437904b2fab03fa08b687a8099f0c4d032ea5bca5fc2a02be9b837b98738b6a41c8eb14ff4d1b2e0b

Download Submit
memory/212-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/212-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/212-2-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/212-9-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/212-18-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/372-19-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/372-21-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/372-27-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/372-28-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download