dcc1380407613ca6a093e2e09c55d1e08f65dd2f39717c8dc0ef292a02ce32c7

Analysis

max time kernel
3s
max time network
71s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
28/01/2024, 21:43

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General

Target

2024-01-28_1376a3d213792b5b40502f72188e5be6_cryptolocker.exe
Size

32KB
MD5

1376a3d213792b5b40502f72188e5be6
SHA1

a12c43f627c601b4c521ca5c8a63aa03c458ea4b
SHA256

dcc1380407613ca6a093e2e09c55d1e08f65dd2f39717c8dc0ef292a02ce32c7
SHA512

31d4cf8d21e7317c70375260546d610efd5c03ce99b4e41fac2b92a7f212c9527ea48839dff2e915d361c973a9c2bfca2e86d949d6a040df02a89921c8a4d492
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzu02lOV:b/yC4GyNM01GuQMNXw2PSjHC02lY

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x0009000000015c71-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2184	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2548	2024-01-28_1376a3d213792b5b40502f72188e5be6_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
2548	2024-01-28_1376a3d213792b5b40502f72188e5be6_cryptolocker.exe
2184	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2548 wrote to memory of 2184	2548	2024-01-28_1376a3d213792b5b40502f72188e5be6_cryptolocker.exe	28
PID 2548 wrote to memory of 2184	2548	2024-01-28_1376a3d213792b5b40502f72188e5be6_cryptolocker.exe	28
PID 2548 wrote to memory of 2184	2548	2024-01-28_1376a3d213792b5b40502f72188e5be6_cryptolocker.exe	28
PID 2548 wrote to memory of 2184	2548	2024-01-28_1376a3d213792b5b40502f72188e5be6_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-01-28_1376a3d213792b5b40502f72188e5be6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-28_1376a3d213792b5b40502f72188e5be6_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2548
- 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:2184

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
32KB

MD5
0b8ce2d884e1fa553204c7e027c9b637

SHA1
8495ee5728c407d1eb4c23cd20c5a654cac38d3a

SHA256
8febb6d2e0b39b96bdbe6355571cac9984b2b3fb3831a9dfa363458d743bc81b

SHA512
c43a9dcdf85e42a370d23ab974e421f8cba1dd530be1d1d0d597cf32610a0edeece16e86cd19781818f663ec192283ece1538f8787d6de204c7ef5b867e86223

Download Submit
memory/2184-23-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2548-0-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2548-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2548-8-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download