340c5d89adef60fec12ab8137d685a08c01efcdcfed0d0761b9d7da82ae0fc53

Analysis

max time kernel
14s
max time network
123s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
04/02/2024, 10:41

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General

Target

2024-02-04_e18c0f13baf360080de6c5a29fe7f89f_cryptolocker.exe
Size

41KB
MD5

e18c0f13baf360080de6c5a29fe7f89f
SHA1

a88d47bfe27a6ff100e840fdb28ecc6fb5d5b44b
SHA256

340c5d89adef60fec12ab8137d685a08c01efcdcfed0d0761b9d7da82ae0fc53
SHA512

c75ded363353586849ee2b1a1dcfe1584dbb733e57e586b10c4261554728a4a40ecb594df6fbdffb0baafa50e1497cc98bb3e98d910656d9100034e78a1ba228
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAa/:b/pYayGig5HjS3NPAI

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000a00000001223b-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2704	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2864	2024-02-04_e18c0f13baf360080de6c5a29fe7f89f_cryptolocker.exe

Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
2864	2024-02-04_e18c0f13baf360080de6c5a29fe7f89f_cryptolocker.exe
2704	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2864 wrote to memory of 2704	2864	2024-02-04_e18c0f13baf360080de6c5a29fe7f89f_cryptolocker.exe	28
PID 2864 wrote to memory of 2704	2864	2024-02-04_e18c0f13baf360080de6c5a29fe7f89f_cryptolocker.exe	28
PID 2864 wrote to memory of 2704	2864	2024-02-04_e18c0f13baf360080de6c5a29fe7f89f_cryptolocker.exe	28
PID 2864 wrote to memory of 2704	2864	2024-02-04_e18c0f13baf360080de6c5a29fe7f89f_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-04_e18c0f13baf360080de6c5a29fe7f89f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_e18c0f13baf360080de6c5a29fe7f89f_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2864
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of UnmapMainImage
  PID:2704

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\retln.exe

Filesize
41KB

MD5
b0f711473f92726dab90bc3b52f584de

SHA1
2e1755405652b13a2beb68fb0f43e41966d5df17

SHA256
55d1a5b8fb12b0bff553dce341da26b2154effd3b8bd972b42546a48069ba5e0

SHA512
22b9b431c8c21d4795e1de9b53dcc95a14f692bf3e398e9a263a667ee694d62e36351b7862b90191383db8a515cf8e0a4b7cc68220a2356347a96d5f6fe40674

Download Submit
memory/2704-16-0x00000000003D0000-0x00000000003D6000-memory.dmp

Filesize
24KB

Download
memory/2864-0-0x00000000001F0000-0x00000000001F6000-memory.dmp

Filesize
24KB

Download
memory/2864-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2864-3-0x00000000001F0000-0x00000000001F6000-memory.dmp

Filesize
24KB

Download