56f2fc27d5295cbd5d88efd7f2f5a5e396df8509f9cb48c899da3b9822eaf19a

Analysis

max time kernel
13s
max time network
153s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
17-02-2024 13:29

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General

Target

2024-02-17_3d9002021780972b804c35efce55683a_cryptolocker.exe
Size

39KB
MD5

3d9002021780972b804c35efce55683a
SHA1

29379643c4dd3583af5e2c8f5f1ad6daaa4c2bfe
SHA256

56f2fc27d5295cbd5d88efd7f2f5a5e396df8509f9cb48c899da3b9822eaf19a
SHA512

3114f24bf4c565c763066d104112024de70a663d6bfa28fc93080d2affef653563b015e40987f787a34e77cb7655b5af498c69b1f714fcc969407c3665e633de
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8+Z5C:b/pYayGig5HjS3N+XC

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x0009000000012262-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
1528	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2988	2024-02-17_3d9002021780972b804c35efce55683a_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
2988	2024-02-17_3d9002021780972b804c35efce55683a_cryptolocker.exe
1528	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2988 wrote to memory of 1528	2988	2024-02-17_3d9002021780972b804c35efce55683a_cryptolocker.exe	28
PID 2988 wrote to memory of 1528	2988	2024-02-17_3d9002021780972b804c35efce55683a_cryptolocker.exe	28
PID 2988 wrote to memory of 1528	2988	2024-02-17_3d9002021780972b804c35efce55683a_cryptolocker.exe	28
PID 2988 wrote to memory of 1528	2988	2024-02-17_3d9002021780972b804c35efce55683a_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-17_3d9002021780972b804c35efce55683a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-17_3d9002021780972b804c35efce55683a_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2988
- 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:1528

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
39KB

MD5
1bc987380e317e1ff2fc6dcda9e5b6f7

SHA1
2df52e6cc0e73786731e7f2e61788570c3f26aee

SHA256
c94ad7333dcc443924e9bf30ccbb3b7156bd550c792237d6124ffc34fb14369d

SHA512
89f09a86d6bdab0203087ef68e35d4300af20b212fb4f44442643a21bfbd922736e8209e816373837efd38a3c4ad4e9ad422982d6c0a02706dea79281d83010e

Download Submit
memory/1528-23-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2988-0-0x0000000000200000-0x0000000000206000-memory.dmp

Filesize
24KB

Download
memory/2988-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2988-1-0x0000000000200000-0x0000000000206000-memory.dmp

Filesize
24KB

Download