11b48e0877ba28f30101375d595e1e63f7354dedb22dfd5c53fb2e70f03b0643

Analysis

max time kernel
11s
max time network
122s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
13/02/2024, 22:30

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General

Target

2024-02-13_5dce3d0d1c1f3e249684e51bdfa8e307_cryptolocker.exe
Size

36KB
MD5

5dce3d0d1c1f3e249684e51bdfa8e307
SHA1

694b9c55c9890a6d419f4e48350191bd26f33f58
SHA256

11b48e0877ba28f30101375d595e1e63f7354dedb22dfd5c53fb2e70f03b0643
SHA512

4629e141b07745a308d040ad18793c760151655b7fc9c0ec219a8e75f69fac7d8297c15100c3a217463061fb8aeb058d02076b90c66d4b1b021c96778c023ea1
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuVSXp:b/yC4GyNM01GuQMNXw2PSjHPbSuo5

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000e000000012670-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2196	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
1652	2024-02-13_5dce3d0d1c1f3e249684e51bdfa8e307_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
1652	2024-02-13_5dce3d0d1c1f3e249684e51bdfa8e307_cryptolocker.exe
2196	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1652 wrote to memory of 2196	1652	2024-02-13_5dce3d0d1c1f3e249684e51bdfa8e307_cryptolocker.exe	28
PID 1652 wrote to memory of 2196	1652	2024-02-13_5dce3d0d1c1f3e249684e51bdfa8e307_cryptolocker.exe	28
PID 1652 wrote to memory of 2196	1652	2024-02-13_5dce3d0d1c1f3e249684e51bdfa8e307_cryptolocker.exe	28
PID 1652 wrote to memory of 2196	1652	2024-02-13_5dce3d0d1c1f3e249684e51bdfa8e307_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-13_5dce3d0d1c1f3e249684e51bdfa8e307_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-13_5dce3d0d1c1f3e249684e51bdfa8e307_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1652
- 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:2196

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
36KB

MD5
17bbbeeccde74367a889a45a360ec7de

SHA1
afda5154406fe1a02f50fb9b18d1e293fecd9a42

SHA256
f10efdd29c827d909d8c85aa6a85426f831fb7023a6e9808f4f3d3bd7a1a44b2

SHA512
4b37138538be8ca6e396e92ff955a8f28db7f35669a28caf3e12fd787296db4859f357919de0238fcb08d9491061e99cba04168b5d24989ebe183e1ecd04f443

Download Submit
memory/1652-0-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/1652-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1652-1-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2196-18-0x0000000000490000-0x0000000000496000-memory.dmp

Filesize
24KB

Download