21b9dbacd7d1515d8ba912afa9c31af1c3f90317969c90b986e55a56164d4d63

Analysis

max time kernel
149s
max time network
154s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
24-05-2024 04:29

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General

Target

2024-05-24_55f9d53e1465b238b40ac2e0879e5ce6_cryptolocker.exe
Size

41KB
MD5

55f9d53e1465b238b40ac2e0879e5ce6
SHA1

5ab7e163d8958172e4a601345a588061a9379da0
SHA256

21b9dbacd7d1515d8ba912afa9c31af1c3f90317969c90b986e55a56164d4d63
SHA512

7ae1fcd3ac5ff13dbd84cedc99ad83a9468ac94b0589b1e8f30f7be937b104a51cd744da89da1dba8480f2cb386638616181dac3461ceb532a8d2d955f102fac
SSDEEP

384:ba74uGLLQRcsdeQ72ngEr4K7YmE8j6CQYnrz1ZhdaXFXSCVQTLfjDpXqxKHO:ba74zYcgT/EkdCQgpwXFXSqQXfj0xKu

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2768-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\hasfj.exe	CryptoLocker_rule2
behavioral1/memory/2768-15-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3052-16-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3052-26-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2768-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\hasfj.exe	UPX
behavioral1/memory/2768-15-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/3052-16-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/3052-26-0x0000000008000000-0x000000000800F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

hasfj.exe

pid process

3052 hasfj.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-24_55f9d53e1465b238b40ac2e0879e5ce6_cryptolocker.exe

pid process

2768 2024-05-24_55f9d53e1465b238b40ac2e0879e5ce6_cryptolocker.exe

pid	process
3052	hasfj.exe

pid	process
2768	2024-05-24_55f9d53e1465b238b40ac2e0879e5ce6_cryptolocker.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral1/memory/2768-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\hasfj.exe	upx
behavioral1/memory/2768-15-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/3052-16-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/3052-26-0x0000000008000000-0x000000000800F000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-05-24_55f9d53e1465b238b40ac2e0879e5ce6_cryptolocker.exe

description	pid	process	target process
PID 2768 wrote to memory of 3052	2768	2024-05-24_55f9d53e1465b238b40ac2e0879e5ce6_cryptolocker.exe	hasfj.exe
PID 2768 wrote to memory of 3052	2768	2024-05-24_55f9d53e1465b238b40ac2e0879e5ce6_cryptolocker.exe	hasfj.exe
PID 2768 wrote to memory of 3052	2768	2024-05-24_55f9d53e1465b238b40ac2e0879e5ce6_cryptolocker.exe	hasfj.exe
PID 2768 wrote to memory of 3052	2768	2024-05-24_55f9d53e1465b238b40ac2e0879e5ce6_cryptolocker.exe	hasfj.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_55f9d53e1465b238b40ac2e0879e5ce6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_55f9d53e1465b238b40ac2e0879e5ce6_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2768
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:3052

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\hasfj.exe

Filesize
41KB

MD5
f3c37770bfce639d0fde52feecd0281f

SHA1
366a94adbd961d142cfae65480b26703619393d9

SHA256
e64e28c21d3b7fd9019658f0b14e582c2c73047a772378fd747866ff061c56ac

SHA512
9647014116e5e4d943e4e1498be387587a8f2f6e96ea0bd59cf41308811efcf8b5b1dce2af46883422cdd4cc5321e0e93286d132f39fae0cd4196d0e7b617ba0

Download Submit
memory/2768-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2768-1-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/2768-2-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/2768-9-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/2768-15-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3052-16-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3052-25-0x00000000002F0000-0x00000000002F6000-memory.dmp

Filesize
24KB

Download
memory/3052-18-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/3052-26-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download