f053b94ac3ae3b3c4752fd3fec022f89b33cd5b288df467b5c294496575b3b8e

Analysis

max time kernel
10s
max time network
153s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
28-01-2024 05:28

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General

Target

2024-01-28_58ce11bcf0ab88fa7767eeee46c58e73_cryptolocker.exe
Size

26KB
MD5

58ce11bcf0ab88fa7767eeee46c58e73
SHA1

05d855d9c779f78d59380d3ad4edb1ea5eeda177
SHA256

f053b94ac3ae3b3c4752fd3fec022f89b33cd5b288df467b5c294496575b3b8e
SHA512

a117f47d072e0fdeebb15aba25ac298bbfc15e45b382e96f18e2f928233aee1ca3a0ef7c17eab4be80e6469828329f1b6f1b307053c002d82c5757305427b970
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zznum46:b/yC4GyNM01GuQMNXumB

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x0009000000012280-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2300	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2176	2024-01-28_58ce11bcf0ab88fa7767eeee46c58e73_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
2176	2024-01-28_58ce11bcf0ab88fa7767eeee46c58e73_cryptolocker.exe
2300	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2176 wrote to memory of 2300	2176	2024-01-28_58ce11bcf0ab88fa7767eeee46c58e73_cryptolocker.exe	28
PID 2176 wrote to memory of 2300	2176	2024-01-28_58ce11bcf0ab88fa7767eeee46c58e73_cryptolocker.exe	28
PID 2176 wrote to memory of 2300	2176	2024-01-28_58ce11bcf0ab88fa7767eeee46c58e73_cryptolocker.exe	28
PID 2176 wrote to memory of 2300	2176	2024-01-28_58ce11bcf0ab88fa7767eeee46c58e73_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-01-28_58ce11bcf0ab88fa7767eeee46c58e73_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-28_58ce11bcf0ab88fa7767eeee46c58e73_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2176
- 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:2300

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

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Downloads

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

Filesize
26KB

MD5
4a88931d967281e17cfbeb0ada369ac3

SHA1
3214f37bf3101a00ef5122dcc5871ade49f43c4a

SHA256
165a33b4f78cd5a8d8d36e090dc57d4fed11b682ea48fb102e310572efcd80b1

SHA512
fbd86aef670d3f1eb8ffc41d71fa1c056fa6e04ce89bd7267c36487cec1a989b78d4a55a06604182da9b42b705bcf73f618e1b570364883b47d3cb9540437cab

Download Submit
memory/2176-0-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/2176-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2176-8-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/2300-22-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download