96f2952364c593f80a87b3f76d83412d9b85321c9116318a88de2cb3911f2927

Analysis

max time kernel
9s
max time network
153s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
26/01/2024, 04:27

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General

Target

2024-01-26_4bd2e01ff9a79f0fd448f5a8a40e8a79_cryptolocker.exe
Size

40KB
MD5

4bd2e01ff9a79f0fd448f5a8a40e8a79
SHA1

a23852bed98f7023ae304f0bc8632b151ad99218
SHA256

96f2952364c593f80a87b3f76d83412d9b85321c9116318a88de2cb3911f2927
SHA512

0f279d65920ba2a61dcba5602fc10955d1bc56f6771f55c7103e33b46bf9004c73181b6423264fab1861503cf6c7fc16b2a2137a5b371bcf2ecb27e7330ebb14
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAz:b/pYayGig5HjS3NPAz

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x00050000000120fa-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2244	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2460	2024-01-26_4bd2e01ff9a79f0fd448f5a8a40e8a79_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
2460	2024-01-26_4bd2e01ff9a79f0fd448f5a8a40e8a79_cryptolocker.exe
2244	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2460 wrote to memory of 2244	2460	2024-01-26_4bd2e01ff9a79f0fd448f5a8a40e8a79_cryptolocker.exe	28
PID 2460 wrote to memory of 2244	2460	2024-01-26_4bd2e01ff9a79f0fd448f5a8a40e8a79_cryptolocker.exe	28
PID 2460 wrote to memory of 2244	2460	2024-01-26_4bd2e01ff9a79f0fd448f5a8a40e8a79_cryptolocker.exe	28
PID 2460 wrote to memory of 2244	2460	2024-01-26_4bd2e01ff9a79f0fd448f5a8a40e8a79_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-01-26_4bd2e01ff9a79f0fd448f5a8a40e8a79_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-26_4bd2e01ff9a79f0fd448f5a8a40e8a79_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2460
- 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:2244

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
40KB

MD5
4aa9334759f06c5a5f6b6f60f04d9c9e

SHA1
d6c8ab4f156faf1f11ff0629005e9e05739ed6ad

SHA256
4c17dfd780679017158806f352f4a647b69eb96f79b5ee599868bfddc4fe17af

SHA512
8a25eaaf2f1cfe554c2a981870e107b1cca8fd28270ea99240da7237b9cf832918167a574721fb5c3f9282f5423549c49db36fe2cb85ba7b596eaecc3ed4ab78

Download Submit
memory/2244-23-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download
memory/2460-0-0x00000000003C0000-0x00000000003C6000-memory.dmp

Filesize
24KB

Download
memory/2460-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2460-2-0x00000000003C0000-0x00000000003C6000-memory.dmp

Filesize
24KB

Download