9e174b77c25e87c0152b6749f0a5f1c908e0febadad9dbeb4dea93aa7140bf9e

Analysis

max time kernel
10s
max time network
155s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
21/02/2024, 20:32

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General

Target

2024-02-21_345eaa9b4a154627dbedc92decf11717_cryptolocker.exe
Size

39KB
MD5

345eaa9b4a154627dbedc92decf11717
SHA1

faf9660cb5baf9c97691258c5266bf403cc154bb
SHA256

9e174b77c25e87c0152b6749f0a5f1c908e0febadad9dbeb4dea93aa7140bf9e
SHA512

9b811ccae262107a4a088f0f6a7ce0e658191b2ef3560eb3fec963c954ac3007f6545b85599ca5cf8678e4717ddbecf646a4d12d41780077969b5b26a2f5bdc6
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlmoHC:b/yC4GyNM01GuQMNXw2PSjHPbSuYlZi

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000c0000000126ab-13.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2064	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2872	2024-02-21_345eaa9b4a154627dbedc92decf11717_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
2872	2024-02-21_345eaa9b4a154627dbedc92decf11717_cryptolocker.exe
2064	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2872 wrote to memory of 2064	2872	2024-02-21_345eaa9b4a154627dbedc92decf11717_cryptolocker.exe	28
PID 2872 wrote to memory of 2064	2872	2024-02-21_345eaa9b4a154627dbedc92decf11717_cryptolocker.exe	28
PID 2872 wrote to memory of 2064	2872	2024-02-21_345eaa9b4a154627dbedc92decf11717_cryptolocker.exe	28
PID 2872 wrote to memory of 2064	2872	2024-02-21_345eaa9b4a154627dbedc92decf11717_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-21_345eaa9b4a154627dbedc92decf11717_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-21_345eaa9b4a154627dbedc92decf11717_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2872
- 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:2064

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

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

Filesize
39KB

MD5
3aacdf061e086fbb7be72b2b8abeb016

SHA1
2de11dc364b39e1ecac1d353c7e56c8868453c93

SHA256
cdf9ee971e198abff7e057a7b960ab5f2d3ef6921a24c480cfd7bd0d56d389a8

SHA512
d65dc8965bdcdd37f00aad1f2529309f9cf1f4ea8c8224ac9fe4beb77c2ebab42d04d8e543c4610147dcd4675cc7bd071f4251258ad4516c343f05bf6ea35dc1

Download Submit
memory/2064-17-0x00000000003F0000-0x00000000003F6000-memory.dmp

Filesize
24KB

Download
memory/2872-0-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download
memory/2872-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2872-2-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download