aadba286df38c1db19116df6677e873005ebb21c24241b7a8fc34d589fe1d00a

Analysis

max time kernel
17s
max time network
120s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
01-05-2024 12:34

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General

Target

2024-05-01_6a3c9cf37807f1b8022691ee853e99e3_cryptolocker.exe
Size

43KB
MD5

6a3c9cf37807f1b8022691ee853e99e3
SHA1

e4ca30f6f0d4e4d42a15f6532b8027805e344326
SHA256

aadba286df38c1db19116df6677e873005ebb21c24241b7a8fc34d589fe1d00a
SHA512

1d4d92f4e955f8326f01bc5d2b17aa9ba7faee9f927e7c99a8967793bdfb33fd8400f15e006e04a9dc2ba62ee4c87c2d2e5288eb8841dd89092e007b04adb19b
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAJ:b/pYayGig5HjS3NPAJ

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000c0000000146fc-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2736	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2324	2024-05-01_6a3c9cf37807f1b8022691ee853e99e3_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
2324	2024-05-01_6a3c9cf37807f1b8022691ee853e99e3_cryptolocker.exe
2736	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2324 wrote to memory of 2736	2324	2024-05-01_6a3c9cf37807f1b8022691ee853e99e3_cryptolocker.exe	28
PID 2324 wrote to memory of 2736	2324	2024-05-01_6a3c9cf37807f1b8022691ee853e99e3_cryptolocker.exe	28
PID 2324 wrote to memory of 2736	2324	2024-05-01_6a3c9cf37807f1b8022691ee853e99e3_cryptolocker.exe	28
PID 2324 wrote to memory of 2736	2324	2024-05-01_6a3c9cf37807f1b8022691ee853e99e3_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-01_6a3c9cf37807f1b8022691ee853e99e3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-01_6a3c9cf37807f1b8022691ee853e99e3_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2324
- 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:2736

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
221a2d98824fba31a570b2ed58099ead

SHA1
ed8cedf9fa7749172d6883496ed2d481d611cf7a

SHA256
849239ff50df4d3eee62c72357be5a4e9c56d896e0079a77fad4eb5fc8517507

SHA512
265ccfc076a82bb53d38607b1469f52c0f62a6963c3cf3388b258b3b52797bba7ba998d86a31a637be298d7e370500552c8122d125dabf538957541efc868162

Download Submit
memory/2324-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2324-0-0x00000000003F0000-0x00000000003F6000-memory.dmp

Filesize
24KB

Download
memory/2324-8-0x00000000003F0000-0x00000000003F6000-memory.dmp

Filesize
24KB

Download