65f576898f380950826eba684f7a43e116fb1b92be82cb0f6796395219b87018

Analysis

max time kernel
121s
max time network
124s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
19/02/2024, 20:32

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General

Target

2024-02-19_6bf8df18cde8c146382367dde1c9b305_cryptolocker.exe
Size

39KB
MD5

6bf8df18cde8c146382367dde1c9b305
SHA1

72124f4be948d685d89c3bf6dea0d877c0af8a90
SHA256

65f576898f380950826eba684f7a43e116fb1b92be82cb0f6796395219b87018
SHA512

34200a95905f6a9e951967b015f8b0623084406f5e4dc9ea1c866f1f15ccb92ca2fa2a3e1c6d12f2f1fcbc6dd1be9c4ff187d012d3af82a8f34fd6d75147c63d
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlaJWD:b/pYayGig5HjS3OY

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000c00000001225c-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2660	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2224	2024-02-19_6bf8df18cde8c146382367dde1c9b305_cryptolocker.exe

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
2224	2024-02-19_6bf8df18cde8c146382367dde1c9b305_cryptolocker.exe
2660	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2224 wrote to memory of 2660	2224	2024-02-19_6bf8df18cde8c146382367dde1c9b305_cryptolocker.exe	28
PID 2224 wrote to memory of 2660	2224	2024-02-19_6bf8df18cde8c146382367dde1c9b305_cryptolocker.exe	28
PID 2224 wrote to memory of 2660	2224	2024-02-19_6bf8df18cde8c146382367dde1c9b305_cryptolocker.exe	28
PID 2224 wrote to memory of 2660	2224	2024-02-19_6bf8df18cde8c146382367dde1c9b305_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-19_6bf8df18cde8c146382367dde1c9b305_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-19_6bf8df18cde8c146382367dde1c9b305_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2224
- 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:2660

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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
39KB

MD5
370a24e6b4156893b2f06ff88ce118b7

SHA1
70b2aa7befefbfe0443f06c5ae9dcc9062474159

SHA256
133db328fe146c651aca5f8b28d364a62dcdaa66b4ad104cd298dfd423dfc677

SHA512
d8aca77fcd62b1af27633752a5ab08e9cde36b5269fcbeace77c2965b6972244c9b6f587762175e23123e01edd68fcdaa878a518cec3ebf59330fe7dcee9ff37

Download Submit
memory/2224-0-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2224-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2224-8-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2660-17-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download