da289e4a13fcf31d44979a1c1c8648ef0f918d00a1048ecb113f6f331076774f

Analysis

max time kernel
6s
max time network
151s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
11/05/2024, 05:28

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-05-11_1592e5a38867d4ad28f255b366161838_cryptolocker.exe
Size

43KB
MD5

1592e5a38867d4ad28f255b366161838
SHA1

8e6cc4773ac52c0e95cf4a22345c61c8069a3215
SHA256

da289e4a13fcf31d44979a1c1c8648ef0f918d00a1048ecb113f6f331076774f
SHA512

a4f6a25d5ce2ce5f49584f2f8cf4a01344b3a14c1ca188b812c5b01497e57229a26cc8f80a60cb714655c99db558b3ae4d354171c43041c4b36f5b447adc44b0
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PA1:b/pYayGig5HjS3NPA1

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000b000000012257-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2468	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
1220	2024-05-11_1592e5a38867d4ad28f255b366161838_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

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
1220	2024-05-11_1592e5a38867d4ad28f255b366161838_cryptolocker.exe
2468	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1220 wrote to memory of 2468	1220	2024-05-11_1592e5a38867d4ad28f255b366161838_cryptolocker.exe	28
PID 1220 wrote to memory of 2468	1220	2024-05-11_1592e5a38867d4ad28f255b366161838_cryptolocker.exe	28
PID 1220 wrote to memory of 2468	1220	2024-05-11_1592e5a38867d4ad28f255b366161838_cryptolocker.exe	28
PID 1220 wrote to memory of 2468	1220	2024-05-11_1592e5a38867d4ad28f255b366161838_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-11_1592e5a38867d4ad28f255b366161838_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-11_1592e5a38867d4ad28f255b366161838_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1220
- 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:2468

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
44KB

MD5
56e26b35b8e309358282c10ba40092aa

SHA1
2b906edef1e6f1c4f3281fea1e8aec8c3e8335f3

SHA256
5ac54651fd879fe879f8d8324492e59540f7921832506dbb78dac35a37171d4c

SHA512
af3da9147fbb9e9ec4afdf38a80f5b2fecb281356ec70573ca82bfb3f360438d0c95b59a0580ca81db51a3ba714a3da6bf74ab46321d0535b3bccdccee9264be

Download Submit
memory/1220-0-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download
memory/1220-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1220-8-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download
memory/2468-23-0x0000000001CE0000-0x0000000001CE6000-memory.dmp

Filesize
24KB

Download