e66152b53fb851769c3abac3e5b9211275e4111dc24b5d3871737ef3ad8a7289

Analysis

max time kernel
10s
max time network
150s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
03-06-2024 18:07

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General

Target

2024-06-03_86abfd3571bc76f3c54cc5f61d275cd0_cryptolocker.exe
Size

43KB
MD5

86abfd3571bc76f3c54cc5f61d275cd0
SHA1

fb7ee0ceb0e5f2046e3dc35400b9da76d56315eb
SHA256

e66152b53fb851769c3abac3e5b9211275e4111dc24b5d3871737ef3ad8a7289
SHA512

daab8acb0a46da03fabc56f8a2d2034306aa738dab20e54c7894642230e0897464f6330931c32885a07a4d0e9f0b7a02809cfb56f8d9a87aec5fb17913b4137d
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAekQk:b/pYayGig5HjS3NPAekR

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000c000000013417-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2528	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
3064	2024-06-03_86abfd3571bc76f3c54cc5f61d275cd0_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
3064	2024-06-03_86abfd3571bc76f3c54cc5f61d275cd0_cryptolocker.exe
2528	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3064 wrote to memory of 2528	3064	2024-06-03_86abfd3571bc76f3c54cc5f61d275cd0_cryptolocker.exe	28
PID 3064 wrote to memory of 2528	3064	2024-06-03_86abfd3571bc76f3c54cc5f61d275cd0_cryptolocker.exe	28
PID 3064 wrote to memory of 2528	3064	2024-06-03_86abfd3571bc76f3c54cc5f61d275cd0_cryptolocker.exe	28
PID 3064 wrote to memory of 2528	3064	2024-06-03_86abfd3571bc76f3c54cc5f61d275cd0_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-06-03_86abfd3571bc76f3c54cc5f61d275cd0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_86abfd3571bc76f3c54cc5f61d275cd0_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3064
- 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:2528

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
43KB

MD5
40386f0942449babe965c5f3b7840d23

SHA1
54a2d017e087153a5cb8406a1cac0149fb0296ad

SHA256
d60425ee759bad6a25846f8bdc12e467b52edfa02d8af5705ad5ed4743a93e1a

SHA512
464d15f208cd8083e95146fcaefe80e752786b66a2ff8aa7524d14d2f374f10aa5ca93341029ef5b39ba43011b4e7a28739de4bfbca5d73195fc7b67828b1ed1

Download Submit
memory/2528-23-0x00000000003F0000-0x00000000003F6000-memory.dmp

Filesize
24KB

Download
memory/3064-0-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download
memory/3064-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3064-8-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download