185b24ff8d4c2e18373915b99e9562077897d3ad35ee55cf9f54601122547249

Analysis

max time kernel
15s
max time network
118s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
10/05/2024, 14:34

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General

Target

2024-05-10_da935291ca1e1472df00d28b4ea8641f_cryptolocker.exe
Size

43KB
MD5

da935291ca1e1472df00d28b4ea8641f
SHA1

9d31a1369176641e1534480f1e6ab3127ccbee03
SHA256

185b24ff8d4c2e18373915b99e9562077897d3ad35ee55cf9f54601122547249
SHA512

4fcd188ee33181956dcebac971a3487eab25b2f9d6b37b0d64eba90f4addee6d6d6b88a0e25c6a646dd0432524893e2c1891feac25ad8ab70dde36ce57504685
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAVd:b/pYayGig5HjS3NPAVd

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000b000000015ccd-13.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
1404	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2304	2024-05-10_da935291ca1e1472df00d28b4ea8641f_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
2304	2024-05-10_da935291ca1e1472df00d28b4ea8641f_cryptolocker.exe
1404	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2304 wrote to memory of 1404	2304	2024-05-10_da935291ca1e1472df00d28b4ea8641f_cryptolocker.exe	28
PID 2304 wrote to memory of 1404	2304	2024-05-10_da935291ca1e1472df00d28b4ea8641f_cryptolocker.exe	28
PID 2304 wrote to memory of 1404	2304	2024-05-10_da935291ca1e1472df00d28b4ea8641f_cryptolocker.exe	28
PID 2304 wrote to memory of 1404	2304	2024-05-10_da935291ca1e1472df00d28b4ea8641f_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-10_da935291ca1e1472df00d28b4ea8641f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-10_da935291ca1e1472df00d28b4ea8641f_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2304
- 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:1404

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

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

Filesize
43KB

MD5
ad7c33540f16c34c4d8ef5871970393e

SHA1
43c31c328cc6fbde64d8dead5f6f6128ff246a0c

SHA256
65486093d62504b299ad53eebc180921cd8ac342eae0995dd9baab03ec1f99e0

SHA512
f842ba281fcc81e7e4bf899200a1e279e64e048f7f98fb2bacda4eeb72adabbd418528b09c849be19674d5e20ef8c149b3aa773ec6b8943d9aca716b992305b1

Download Submit
memory/1404-23-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2304-0-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/2304-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2304-1-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download