226c45692bd5fe7b66316716992b18f434e8e03c2d46647440d364fc1d616eff

Analysis

max time kernel
14s
max time network
121s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
01/06/2024, 01:09

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General

Target

2024-06-01_83a3037908d11d4d0cb4fea23fda37dd_cryptolocker.exe
Size

42KB
MD5

83a3037908d11d4d0cb4fea23fda37dd
SHA1

6a908b8b4e51111ad871542c804e2bd8a28dffe6
SHA256

226c45692bd5fe7b66316716992b18f434e8e03c2d46647440d364fc1d616eff
SHA512

c89e08d2d6f28b42fee434b2e791f517fc118bbba9d3d8f3334e72b0f2dc4a0ee7b157be76cff8c3a03cff4353ce82214351a9c8548ce9cfcbc664dc9acc73a8
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAY:b/pYayGig5HjS3NPAY

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000f000000012028-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2592	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
492	2024-06-01_83a3037908d11d4d0cb4fea23fda37dd_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
492	2024-06-01_83a3037908d11d4d0cb4fea23fda37dd_cryptolocker.exe
2592	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 492 wrote to memory of 2592	492	2024-06-01_83a3037908d11d4d0cb4fea23fda37dd_cryptolocker.exe	29
PID 492 wrote to memory of 2592	492	2024-06-01_83a3037908d11d4d0cb4fea23fda37dd_cryptolocker.exe	29
PID 492 wrote to memory of 2592	492	2024-06-01_83a3037908d11d4d0cb4fea23fda37dd_cryptolocker.exe	29
PID 492 wrote to memory of 2592	492	2024-06-01_83a3037908d11d4d0cb4fea23fda37dd_cryptolocker.exe	29

C:\Users\Admin\AppData\Local\Temp\2024-06-01_83a3037908d11d4d0cb4fea23fda37dd_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-01_83a3037908d11d4d0cb4fea23fda37dd_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:492
- 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:2592

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
42KB

MD5
9ccc661d72d4d329cf525711bab87377

SHA1
4c09a4b3cdd387906354b468e5957dec02b2041c

SHA256
c95487c72a957f796863a3ad082f13e831b4f55e5f2b3a9eacc541f1a43aabee

SHA512
b7009c87fb470c2f156027fadb90b40e3300c9737797b350952ab3c1fa98be5d229a86a99e341c8c605ac6f9b743b18a52f08bdcef3d97743beb3df1ab46a94d

Download Submit
memory/492-0-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/492-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/492-8-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2592-23-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download