817cd26a4e6f2a4cae8d8dcd62ac32cf8dbf8d117fe62a569e7f1ce557104907

Analysis

max time kernel
3s
max time network
71s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
04/02/2024, 10:41

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target

2024-02-04_dbcec9c2ef9fa0be44b5ad9eb58d96c7_cryptolocker.exe
Size

36KB
MD5

dbcec9c2ef9fa0be44b5ad9eb58d96c7
SHA1

3fdf2b043a0d858c51c279b4361280e8a3695049
SHA256

817cd26a4e6f2a4cae8d8dcd62ac32cf8dbf8d117fe62a569e7f1ce557104907
SHA512

73790af8f4069a55a14189481eacc2dc30d02a6e55ac35a0e0fbfde4ef8d79f942f99e1ba770671417728370489d51b7251314307f797f0ebb642b22301a8831
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuVo:b/yC4GyNM01GuQMNXw2PSjHPbSuW

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000e00000001224c-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
3064	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2128	2024-02-04_dbcec9c2ef9fa0be44b5ad9eb58d96c7_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
2128	2024-02-04_dbcec9c2ef9fa0be44b5ad9eb58d96c7_cryptolocker.exe
3064	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2128 wrote to memory of 3064	2128	2024-02-04_dbcec9c2ef9fa0be44b5ad9eb58d96c7_cryptolocker.exe	28
PID 2128 wrote to memory of 3064	2128	2024-02-04_dbcec9c2ef9fa0be44b5ad9eb58d96c7_cryptolocker.exe	28
PID 2128 wrote to memory of 3064	2128	2024-02-04_dbcec9c2ef9fa0be44b5ad9eb58d96c7_cryptolocker.exe	28
PID 2128 wrote to memory of 3064	2128	2024-02-04_dbcec9c2ef9fa0be44b5ad9eb58d96c7_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-04_dbcec9c2ef9fa0be44b5ad9eb58d96c7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_dbcec9c2ef9fa0be44b5ad9eb58d96c7_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2128
- 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:3064

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

Loading Replay Monitor...

Downloads

\Users\Admin\AppData\Local\Temp\retln.exe

Filesize
36KB

MD5
250ce6f34a68b5b647c5e1e9d366201a

SHA1
9c71ffb1a18d63a81042b1fcb52968f5984f5341

SHA256
11c84704546c47c9aa4eb944d4e9352fd7e0f0a9f71265ec4eadd36e5540fc25

SHA512
9646ea831580d2cc1d394b12586dbe724c3c055b16808eb461d1698ebc398444a4f2c3052871278898845a4bc951f28b9a6ba3dc3e50df66f415aaa204d3be9a

Download Submit
memory/2128-0-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2128-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2128-8-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/3064-23-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download