6a9b51da82c9c2a6bd1103a2ea85064d5ebc325efa21a7756afe1751ae93a05d

Analysis

max time kernel
15s
max time network
123s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
08/03/2024, 03:53

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General

Target

2024-03-08_bb32ce304e1fe5a73b0b29c82b44a448_cryptolocker.exe
Size

34KB
MD5

bb32ce304e1fe5a73b0b29c82b44a448
SHA1

ad14a1e15f80d04fc8491b48473e88728eb80dd5
SHA256

6a9b51da82c9c2a6bd1103a2ea85064d5ebc325efa21a7756afe1751ae93a05d
SHA512

dc5070a3276d249f5b40b5768583ba6d80a85c1586f4abec1c65039e8d3b4aea4996d71486c9d4b89c0b6779928e311f0f2c3efe5341ee2340ef0f4ace68e84e
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6A0X/EIjNcMqe:b/yC4GyNM01GuQMNXw2PSjH+PPNcxe

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000c00000001224c-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2564	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2856	2024-03-08_bb32ce304e1fe5a73b0b29c82b44a448_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
2856	2024-03-08_bb32ce304e1fe5a73b0b29c82b44a448_cryptolocker.exe
2564	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2856 wrote to memory of 2564	2856	2024-03-08_bb32ce304e1fe5a73b0b29c82b44a448_cryptolocker.exe	28
PID 2856 wrote to memory of 2564	2856	2024-03-08_bb32ce304e1fe5a73b0b29c82b44a448_cryptolocker.exe	28
PID 2856 wrote to memory of 2564	2856	2024-03-08_bb32ce304e1fe5a73b0b29c82b44a448_cryptolocker.exe	28
PID 2856 wrote to memory of 2564	2856	2024-03-08_bb32ce304e1fe5a73b0b29c82b44a448_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-08_bb32ce304e1fe5a73b0b29c82b44a448_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-08_bb32ce304e1fe5a73b0b29c82b44a448_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2856
- 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:2564

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
35KB

MD5
ddf178e92916cfa40b118327a9bc7de7

SHA1
027b8aa8f22b3fd5c967be40c4c577fb76eddb7b

SHA256
49f3e188382c542a5d181e8837436081ae94692428612ef4b94b29cf0369d5de

SHA512
e3e8f7f6c3135f7747a01b7a121dcb1f5f8f0900329b42132b6ee1dacff18269817582df96127bd8cb5bf5e1f524513c1e183a93d93d18f644ba4f315e3e9e01

Download Submit
memory/2564-23-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2856-0-0x0000000000390000-0x0000000000396000-memory.dmp

Filesize
24KB

Download
memory/2856-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2856-8-0x0000000000390000-0x0000000000396000-memory.dmp

Filesize
24KB

Download