5fe8605fab56e87395ed9c98219aa5a18b333024dcb6675e7a9ec22ad15039fc

Analysis

max time kernel
14s
max time network
123s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
04/02/2024, 03:53

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General

Target

2024-02-04_b8a4ed29002a0e6556f99c07d6cb715b_cryptolocker.exe
Size

33KB
MD5

b8a4ed29002a0e6556f99c07d6cb715b
SHA1

e80648e0b1e44741fa355b60fe66357052c9a907
SHA256

5fe8605fab56e87395ed9c98219aa5a18b333024dcb6675e7a9ec22ad15039fc
SHA512

b6051435a3638f3d1203811c5e4ba84b0dea33500173ef62b62b3e738ffbb6807328a63399956dee0b6a0b84fd039bcbd8957466a061d35b2a1615a036413cae
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6A0X/EIG:b/yC4GyNM01GuQMNXw2PSjH+PS

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000b000000012262-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2388	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
1016	2024-02-04_b8a4ed29002a0e6556f99c07d6cb715b_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
1016	2024-02-04_b8a4ed29002a0e6556f99c07d6cb715b_cryptolocker.exe
2388	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1016 wrote to memory of 2388	1016	2024-02-04_b8a4ed29002a0e6556f99c07d6cb715b_cryptolocker.exe	28
PID 1016 wrote to memory of 2388	1016	2024-02-04_b8a4ed29002a0e6556f99c07d6cb715b_cryptolocker.exe	28
PID 1016 wrote to memory of 2388	1016	2024-02-04_b8a4ed29002a0e6556f99c07d6cb715b_cryptolocker.exe	28
PID 1016 wrote to memory of 2388	1016	2024-02-04_b8a4ed29002a0e6556f99c07d6cb715b_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-04_b8a4ed29002a0e6556f99c07d6cb715b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_b8a4ed29002a0e6556f99c07d6cb715b_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1016
- 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:2388

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
33KB

MD5
20c17fc3b86d8335f93101dac65cf277

SHA1
6eeb0d87fdf6f0ce8169904dce9fd414e6e84098

SHA256
aeab4f8d4bdc8ec267e1cee95d7be22c027433633c17bc87e84adab0547607aa

SHA512
e387c17e6c0806b1f1933ee0515aa5831daf41c55870fee5a39f74266343a680be4ed7611a0796128b5ca6b0a5dee064fa9bbe414635ba3e435025cfe5ff6451

Download Submit
memory/1016-0-0x00000000002F0000-0x00000000002F6000-memory.dmp

Filesize
24KB

Download
memory/1016-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1016-2-0x00000000002F0000-0x00000000002F6000-memory.dmp

Filesize
24KB

Download
memory/2388-18-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download