f7cd95fd0a0db32dc0b4677fded62ff3bf37fbddd7f1afd526b2cd4428d74f56

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
24-01-2024 19:26

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General

Target

2024-01-24_b76748b65cfb6d82f13b84494b39053e_cryptolocker.exe
Size

40KB
MD5

b76748b65cfb6d82f13b84494b39053e
SHA1

5024c7f34038abd41ea9dfea5c838243ab08cd60
SHA256

f7cd95fd0a0db32dc0b4677fded62ff3bf37fbddd7f1afd526b2cd4428d74f56
SHA512

77c3d2a35977a14dbfc8ec2151b1d48b9c1b6b6e696fa3fe8833ba62f75c486af3b128a623cda475157a49b6c6b11749984cca3dd3f1bbd69fd811ddad196b18
SSDEEP

768:bIDOw9UiaCHfjnE0Sf88AvvP1oghYvm9/6Dy8PEe:bIDOw9a0Dwo3P1ojvUSDhce

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000f000000023164-12.dat	CryptoLocker_rule2

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-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation	2024-01-24_b76748b65cfb6d82f13b84494b39053e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5024	lossy.exe

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 1472 wrote to memory of 5024	1472	2024-01-24_b76748b65cfb6d82f13b84494b39053e_cryptolocker.exe	87
PID 1472 wrote to memory of 5024	1472	2024-01-24_b76748b65cfb6d82f13b84494b39053e_cryptolocker.exe	87
PID 1472 wrote to memory of 5024	1472	2024-01-24_b76748b65cfb6d82f13b84494b39053e_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-01-24_b76748b65cfb6d82f13b84494b39053e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-24_b76748b65cfb6d82f13b84494b39053e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1472
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:5024

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
40KB

MD5
e67455d6b61e51af6bd7c61f78a89aca

SHA1
7fc6c4552b01efd2487e8255957d329193136b02

SHA256
7bc019d51da756ef9f517750a2cec533a0f4af79997f367fcc3ba6faf6d22e31

SHA512
25aaf5e9ba80a785dfc7151834b6178db5d92a0c7f4cc2ec7573271be65f603dff027680121db5d320d506635f3238fbd0f073346ff572d481f8bfb2252f1ddc

Download Submit
memory/1472-0-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1472-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1472-2-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/5024-17-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/5024-19-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download