0f92edfc17447c93332341e73826440d43a6aab8307eb433ab9e8fdf7c1cb6eb

Analysis

max time kernel
150s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
10/05/2024, 05:34

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General

Target

2024-05-10_b2974882cfa3ae634e976e66ea1b142a_cryptolocker.exe
Size

50KB
MD5

b2974882cfa3ae634e976e66ea1b142a
SHA1

6ac7ef0a65bf04faed7993b5306767789e5552d8
SHA256

0f92edfc17447c93332341e73826440d43a6aab8307eb433ab9e8fdf7c1cb6eb
SHA512

5040ffbe300368710c56bbb9530acdb938c5a8e65a811301599f8c23f644b6823009c0fa47eef5c03a1d92b6967913c127487cbb98f35ae12bee5420cfb67491
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtXY:bODOw9acifAoc+vXY

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3392-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002328e-13.dat	CryptoLocker_rule2
behavioral2/memory/856-18-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3392-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/856-27-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3392-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/files/0x000700000002328e-13.dat	UPX
behavioral2/memory/856-18-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/3392-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/856-27-0x0000000008000000-0x000000000800F000-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	2024-05-10_b2974882cfa3ae634e976e66ea1b142a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
856	lossy.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3392-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/files/0x000700000002328e-13.dat	upx
behavioral2/memory/856-18-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/3392-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/856-27-0x0000000008000000-0x000000000800F000-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 3392 wrote to memory of 856	3392	2024-05-10_b2974882cfa3ae634e976e66ea1b142a_cryptolocker.exe	82
PID 3392 wrote to memory of 856	3392	2024-05-10_b2974882cfa3ae634e976e66ea1b142a_cryptolocker.exe	82
PID 3392 wrote to memory of 856	3392	2024-05-10_b2974882cfa3ae634e976e66ea1b142a_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-10_b2974882cfa3ae634e976e66ea1b142a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-10_b2974882cfa3ae634e976e66ea1b142a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3392
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:856

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
51KB

MD5
b30e444b4d61f67cfecaae426413d254

SHA1
0eb1e2e79665a641afb6486deb67dc556127e054

SHA256
977ec5074082ddf550b02c0477125a2bde4eeeeaca2b765870e023dfef42de55

SHA512
02e1aa66b32e883f7673d861a6b03e5ee5820623201c3e41d991bc34c60b7297a87b1759bf08d66a775a9f12885b35078ab244ab55cfc7753c8de3c9957d8b9f

Download Submit
memory/856-18-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/856-20-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/856-26-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/856-27-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3392-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3392-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3392-2-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/3392-9-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3392-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download