71d720d128cbf315b2141fc4b8420d6d293d9a9796cabf5db7bee32cb454e2cb

Analysis

max time kernel
11s
max time network
122s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
29/02/2024, 06:10

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General

Target

2024-02-29_fe700762db9d13dfc9f694170a0c4d4b_cryptolocker.exe
Size

35KB
MD5

fe700762db9d13dfc9f694170a0c4d4b
SHA1

5c71b17bb1d030404474e86fde8e927367250c57
SHA256

71d720d128cbf315b2141fc4b8420d6d293d9a9796cabf5db7bee32cb454e2cb
SHA512

8b896456c04bc90197a0213621b5ea00009623d64bbcd917f40939b68d9102d50b008b3279834f37e30260ab573c084cf9c5375aa80cb96ff321af714ada0452
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzu02lOQAs:b/yC4GyNM01GuQMNXw2PSjHC02ltAs

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000900000001222c-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2300	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
1136	2024-02-29_fe700762db9d13dfc9f694170a0c4d4b_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
1136	2024-02-29_fe700762db9d13dfc9f694170a0c4d4b_cryptolocker.exe
2300	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1136 wrote to memory of 2300	1136	2024-02-29_fe700762db9d13dfc9f694170a0c4d4b_cryptolocker.exe	28
PID 1136 wrote to memory of 2300	1136	2024-02-29_fe700762db9d13dfc9f694170a0c4d4b_cryptolocker.exe	28
PID 1136 wrote to memory of 2300	1136	2024-02-29_fe700762db9d13dfc9f694170a0c4d4b_cryptolocker.exe	28
PID 1136 wrote to memory of 2300	1136	2024-02-29_fe700762db9d13dfc9f694170a0c4d4b_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-29_fe700762db9d13dfc9f694170a0c4d4b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-29_fe700762db9d13dfc9f694170a0c4d4b_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1136
- 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

Replay Monitor

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Downloads

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

Filesize
35KB

MD5
492da55e802a46e020bcd0b5281da16e

SHA1
cd72d0a9b9d6adeedd25b340ee5cfc01832447f7

SHA256
6363db911118eca33f2fcb4b1924e2fb9a069ba5c4a039f9287970a2fc6ce0dc

SHA512
99a46196e3571e865d3dbb844a27b03a43fc4f861affdff940ae751a35f5cd675cbece2effff70651e704da86fd6467e1729ad7fa01ba67839b0fc057c472c12

Download Submit
memory/1136-0-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download
memory/1136-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1136-2-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download
memory/2300-17-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download