bea795bea1e9d040fe321e4363254fab1a2688b8eb61d037098762345e784fee

Analysis

max time kernel
17s
max time network
120s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
15/04/2024, 09:56

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General

Target

2024-04-15_8c27b54c42a9973e86315a04d4efd337_cryptolocker.exe
Size

36KB
MD5

8c27b54c42a9973e86315a04d4efd337
SHA1

351114bb7538a8196c10fb911f71f26cf3887667
SHA256

bea795bea1e9d040fe321e4363254fab1a2688b8eb61d037098762345e784fee
SHA512

6b5e599e66793b4ecdc0a59bea7f97bf22ad2959af4fc8cb0817428a21c6b19aff3465cb08418f83283d347d152433baf89215f37e9b1465c4e89f381bfaa824
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHC02ltAUACe:b/pYayGig5HC02gbCe

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000c00000001231d-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2560	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2968	2024-04-15_8c27b54c42a9973e86315a04d4efd337_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
2968	2024-04-15_8c27b54c42a9973e86315a04d4efd337_cryptolocker.exe
2560	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2968 wrote to memory of 2560	2968	2024-04-15_8c27b54c42a9973e86315a04d4efd337_cryptolocker.exe	28
PID 2968 wrote to memory of 2560	2968	2024-04-15_8c27b54c42a9973e86315a04d4efd337_cryptolocker.exe	28
PID 2968 wrote to memory of 2560	2968	2024-04-15_8c27b54c42a9973e86315a04d4efd337_cryptolocker.exe	28
PID 2968 wrote to memory of 2560	2968	2024-04-15_8c27b54c42a9973e86315a04d4efd337_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-15_8c27b54c42a9973e86315a04d4efd337_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-15_8c27b54c42a9973e86315a04d4efd337_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2968
- 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:2560

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
36KB

MD5
4056a0f9d24fac7f3fea3e9576640b1d

SHA1
6edb79530c61e73c4bcbadb7eb8764a470a4744b

SHA256
63895bd98b56665ec385bb92d1c8fcef41f4702be082c8c4fe84f6373331aafd

SHA512
5dfbf22c8fb2da29ccc83c9e22b480a1eb3ec69f5ca46fc26d595c5793990d81cb5a8e5d6ce6776a4f424e034fc7ba46c617bceb97f02ee7467e7f098c0cf306

Download Submit
memory/2560-23-0x00000000003C0000-0x00000000003C6000-memory.dmp

Filesize
24KB

Download
memory/2968-0-0x00000000007E0000-0x00000000007E6000-memory.dmp

Filesize
24KB

Download
memory/2968-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2968-3-0x00000000007E0000-0x00000000007E6000-memory.dmp

Filesize
24KB

Download