559f5d08f62a5830a21acd4c26086e4ae2c89bcbd2de184cf719bdf83a31642e

Analysis

max time kernel
42s
max time network
118s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
24-04-2024 04:23

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General

Target

2024-04-24_0c0f26d7a529198160cbe418522a0767_cryptolocker.exe
Size

42KB
MD5

0c0f26d7a529198160cbe418522a0767
SHA1

7a8811bbce7b90c0e17eaa9a790732c5f4e8e043
SHA256

559f5d08f62a5830a21acd4c26086e4ae2c89bcbd2de184cf719bdf83a31642e
SHA512

9a0024cc80922f294fc516bde4e311060cb6f407a967134e322c2406ac159c5c12b7151c59cb8539e59350e017435743ebca86dcb805fd35888115d0bcfe814e
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAB:b/pYayGig5HjS3NPAB

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000b000000012256-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2940	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
1800	2024-04-24_0c0f26d7a529198160cbe418522a0767_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
1800	2024-04-24_0c0f26d7a529198160cbe418522a0767_cryptolocker.exe
2940	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1800 wrote to memory of 2940	1800	2024-04-24_0c0f26d7a529198160cbe418522a0767_cryptolocker.exe	28
PID 1800 wrote to memory of 2940	1800	2024-04-24_0c0f26d7a529198160cbe418522a0767_cryptolocker.exe	28
PID 1800 wrote to memory of 2940	1800	2024-04-24_0c0f26d7a529198160cbe418522a0767_cryptolocker.exe	28
PID 1800 wrote to memory of 2940	1800	2024-04-24_0c0f26d7a529198160cbe418522a0767_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-24_0c0f26d7a529198160cbe418522a0767_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-24_0c0f26d7a529198160cbe418522a0767_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1800
- 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:2940

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
9c8a79a0ecdf647d96485489b6620b58

SHA1
55b1b3608cd45544b165276dd8f75c78173eaa80

SHA256
ae07176a66e729c0b99d42ffc43b8c570768127cc62d97b7b141f3ef001325c4

SHA512
871bed9ce6b53af2366ba6548337c07389514bb992300e16ddf6b3351093079f8c15c3330351991cd1cb4f01a921a9033680beaa77494d61c6b08805abdeadc4

Download Submit
memory/1800-0-0x0000000000570000-0x0000000000576000-memory.dmp

Filesize
24KB

Download
memory/1800-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1800-8-0x0000000000570000-0x0000000000576000-memory.dmp

Filesize
24KB

Download
memory/2940-17-0x0000000000390000-0x0000000000396000-memory.dmp

Filesize
24KB

Download