aa1a68b5645233444d507b227d494c0314707c5dfe6f6e91c75731a0ae397056

Analysis

max time kernel
17s
max time network
123s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
13/02/2024, 10:41

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General

Target

2024-02-13_a39a03da9e8649f809b01193cd12c2c5_cryptolocker.exe
Size

34KB
MD5

a39a03da9e8649f809b01193cd12c2c5
SHA1

d33a7ea1b2a9e5135475a4cf3f8b2d17ea6e6d34
SHA256

aa1a68b5645233444d507b227d494c0314707c5dfe6f6e91c75731a0ae397056
SHA512

8e471b3ec3ba660cc5824e07116eb63e014fed1865b8ecbccf17ad62c8e07720fb5fb44187c76c95a488612e4f8cee8599f85ca8e80c83769156e7d84b1597d9
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6A0X/EI4:b/yC4GyNM01GuQMNXw2PSjH+Pk

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000800000001225a-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2660	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
1700	2024-02-13_a39a03da9e8649f809b01193cd12c2c5_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
1700	2024-02-13_a39a03da9e8649f809b01193cd12c2c5_cryptolocker.exe
2660	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1700 wrote to memory of 2660	1700	2024-02-13_a39a03da9e8649f809b01193cd12c2c5_cryptolocker.exe	28
PID 1700 wrote to memory of 2660	1700	2024-02-13_a39a03da9e8649f809b01193cd12c2c5_cryptolocker.exe	28
PID 1700 wrote to memory of 2660	1700	2024-02-13_a39a03da9e8649f809b01193cd12c2c5_cryptolocker.exe	28
PID 1700 wrote to memory of 2660	1700	2024-02-13_a39a03da9e8649f809b01193cd12c2c5_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-13_a39a03da9e8649f809b01193cd12c2c5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-13_a39a03da9e8649f809b01193cd12c2c5_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1700
- 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:2660

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
34KB

MD5
9d6b496c6a86c3d2a7eeddafc8ef91d2

SHA1
bcc0802fd070113ed9aced8be6802aea9f618e75

SHA256
0ce4e7a59dd0fd3f49bee9b0d03c8dea9982e2cccf8e57be0d2b6fdd9610cd41

SHA512
46735d5be789ed34a66b049a6326c9f729c6cb77109478504dc29d77c696dbac51dd55b4bcad2e76d18f1cebaf160ad5a4d74d74e91d862bc14de31f6465c72d

Download Submit
memory/1700-0-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download
memory/1700-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1700-8-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download
memory/2660-16-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download