d2956b1604f4a8d948d8f6c5e9dea69dbe5c64ff3ad31702d63dc58cb1d92585

Analysis

max time kernel
18s
max time network
122s
platform
windows7_x64
resource
win7-20240319-en
resource tags

arch:x64arch:x86image:win7-20240319-enlocale:en-usos:windows7-x64system
submitted
16-04-2024 07:41

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General

Target

2024-04-16_ad43835681ae4e565ddbaa9f6c324730_cryptolocker.exe
Size

42KB
MD5

ad43835681ae4e565ddbaa9f6c324730
SHA1

e4a2f17292b9e6c7b9cb8d9914135a1e459d1856
SHA256

d2956b1604f4a8d948d8f6c5e9dea69dbe5c64ff3ad31702d63dc58cb1d92585
SHA512

d94fde7063f6d01450ffa3875146e428c6897d97f44f65ab26966509f8bdf765d81ab54841bc9f6db7fac53483cdbde304e5ee9c3df81d6a75ee637e9fcadcd6
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAt:b/pYayGig5HjS3NPAt

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x001600000000f84c-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2420	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
3028	2024-04-16_ad43835681ae4e565ddbaa9f6c324730_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
3028	2024-04-16_ad43835681ae4e565ddbaa9f6c324730_cryptolocker.exe
2420	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3028 wrote to memory of 2420	3028	2024-04-16_ad43835681ae4e565ddbaa9f6c324730_cryptolocker.exe	28
PID 3028 wrote to memory of 2420	3028	2024-04-16_ad43835681ae4e565ddbaa9f6c324730_cryptolocker.exe	28
PID 3028 wrote to memory of 2420	3028	2024-04-16_ad43835681ae4e565ddbaa9f6c324730_cryptolocker.exe	28
PID 3028 wrote to memory of 2420	3028	2024-04-16_ad43835681ae4e565ddbaa9f6c324730_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-16_ad43835681ae4e565ddbaa9f6c324730_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-16_ad43835681ae4e565ddbaa9f6c324730_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3028
- 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:2420

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
bfde484b68dd212062d4c85b276b723a

SHA1
bcb142ae1a3e690cfe1985b0c313158a0798cf75

SHA256
b3dd9d5a85fdf3e431efcad9deead30cadf219c59ff6af31031f7e58158a2786

SHA512
4e77e4084615b099b5b3638c2a7d7bb28933767a8fccf7cd28547d6b6df488743cc7983146e433bf84bbe0aaa352d22bf471a9c660da433996a94a4a0705e5f1

Download Submit
memory/2420-18-0x00000000002E0000-0x00000000002E6000-memory.dmp

Filesize
24KB

Download
memory/3028-0-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3028-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3028-3-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download