77bb38ce3b777f927585e67b8b3db04fdfcb4cbf92977a284615a6580f26ed6a

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
29-05-2024 11:28

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General

Target

2024-05-29_0a4e9e5a6cf5ad2353c56f114e99f498_cryptolocker.exe
Size

49KB
MD5

0a4e9e5a6cf5ad2353c56f114e99f498
SHA1

439c03f5a11d54574d3992c0bfe094e737400fc3
SHA256

77bb38ce3b777f927585e67b8b3db04fdfcb4cbf92977a284615a6580f26ed6a
SHA512

aeab069cf45858ec94c20ef3821891abffb8fd8bbb73007b00630fa4af0622ae5c0372ae952593cc9c1031665ddac363d0ee38606ed7c99c8a79d14ad9768ea5
SSDEEP

768:bIDOw9UiaCHfjnE0Sf88AvvP1oghYvm9/6D8jnPx9UnuDLlD+0:bIDOw9a0Dwo3P1ojvUSD4PInyDJ

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000800000002328e-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-29_0a4e9e5a6cf5ad2353c56f114e99f498_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1592	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 4332 wrote to memory of 1592	4332	2024-05-29_0a4e9e5a6cf5ad2353c56f114e99f498_cryptolocker.exe	83
PID 4332 wrote to memory of 1592	4332	2024-05-29_0a4e9e5a6cf5ad2353c56f114e99f498_cryptolocker.exe	83
PID 4332 wrote to memory of 1592	4332	2024-05-29_0a4e9e5a6cf5ad2353c56f114e99f498_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-29_0a4e9e5a6cf5ad2353c56f114e99f498_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-29_0a4e9e5a6cf5ad2353c56f114e99f498_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4332
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:1592

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
49KB

MD5
4d6c55f9891f5a99272754be549c315f

SHA1
719d8652d7c9913c33457dc7ebbeb98365e189aa

SHA256
f2f13e9353f8709e4d5702cf4f9da375942ffb3a76da0f768edbc313ab964252

SHA512
94824da0ada20244a586e2328771c64fdba7ef40bda77707086fe73e754718ec84fddcdd588d6a3387e769cd6e8de43c04a0a176cb683ac5c0457ef7cc2265d9

Download Submit
memory/1592-17-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/4332-0-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4332-1-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/4332-8-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download