7e9763a66e4cbf95f130ba939afdcfe0f8405439b0e4abfe0de8072046a1fd5e

Analysis

max time kernel
3s
max time network
71s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
21-04-2024 21:34

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General

Target

2024-04-21_63cbc0544b23818a07be40e04ce9114e_cryptolocker.exe
Size

42KB
MD5

63cbc0544b23818a07be40e04ce9114e
SHA1

535100d763aaf678c765034b7c45a7a74262e9aa
SHA256

7e9763a66e4cbf95f130ba939afdcfe0f8405439b0e4abfe0de8072046a1fd5e
SHA512

ae6c82c5c3ee43d88e03ee18a75d631f684431f165969ccab76bd1ebfe758d3d002d8f5f4fbea297a112119f852373a2ff1d0c66c250ba5a613616891f38d3ce
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAekL:b/pYayGig5HjS3NPAekL

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000b000000012251-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2736	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2324	2024-04-21_63cbc0544b23818a07be40e04ce9114e_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
2324	2024-04-21_63cbc0544b23818a07be40e04ce9114e_cryptolocker.exe
2736	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2324 wrote to memory of 2736	2324	2024-04-21_63cbc0544b23818a07be40e04ce9114e_cryptolocker.exe	28
PID 2324 wrote to memory of 2736	2324	2024-04-21_63cbc0544b23818a07be40e04ce9114e_cryptolocker.exe	28
PID 2324 wrote to memory of 2736	2324	2024-04-21_63cbc0544b23818a07be40e04ce9114e_cryptolocker.exe	28
PID 2324 wrote to memory of 2736	2324	2024-04-21_63cbc0544b23818a07be40e04ce9114e_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-21_63cbc0544b23818a07be40e04ce9114e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-21_63cbc0544b23818a07be40e04ce9114e_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2324
- 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:2736

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
42KB

MD5
7c44f9b329e805b6fad27385e3bccc0d

SHA1
dbbd71e379fc501f5de476a1761769e9215d7afc

SHA256
e46ea59b723a86b23adc74665a9bcc751ae4da358b2690c5c577e9f6c10c72d6

SHA512
ce54bf579a887a1ee3facdb93843adb28624aca82c9ae281bb6debc23195e6f5f39e408424a1fec7879a67ea1cdb58709d5ae1af820a47ebbcbc34600c3309d5

Download Submit
memory/2324-0-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download
memory/2324-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2324-8-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download
memory/2736-20-0x0000000000390000-0x0000000000396000-memory.dmp

Filesize
24KB

Download