e6b3fdf445f594038dc27ef1110d14e5753ecb1dd071d821a28bc24e41ae313c

Analysis

max time kernel
150s
max time network
154s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
11/05/2024, 13:56

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General

Target

2024-05-11_7cf8d8aab0eada5d7f60d7ab3dabfbe5_cryptolocker.exe
Size

40KB
MD5

7cf8d8aab0eada5d7f60d7ab3dabfbe5
SHA1

03ff34e4144a5d18cf2061eaffbea28fd6a575e5
SHA256

e6b3fdf445f594038dc27ef1110d14e5753ecb1dd071d821a28bc24e41ae313c
SHA512

abd3dfbf39639443090bea7043d22c7b5f51b0bd00043c21f436dbbc1ab5f8d7ebfb422dd5d15a950cf3bb634c883bbc3a840e102c9aae4c35a1734a41a79074
SSDEEP

384:ba74uGLLQRcsdeQ72ngEr4K7YmE8j6CQYnrz1ZhdaXFXSCVQTLfjDpXqxKHB0:ba74zYcgT/EkdCQgpwXFXSqQXfj0xKu

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2872-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000e000000015a98-11.dat	CryptoLocker_rule2
behavioral1/memory/2856-16-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2872-15-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2856-26-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2872-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/files/0x000e000000015a98-11.dat	UPX
behavioral1/memory/2856-16-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/2872-15-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/2856-26-0x0000000008000000-0x000000000800F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2856	hasfj.exe

Loads dropped DLL 1 IoCs

pid	Process
2872	2024-05-11_7cf8d8aab0eada5d7f60d7ab3dabfbe5_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2872-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/files/0x000e000000015a98-11.dat	upx
behavioral1/memory/2856-16-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/2872-15-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/2856-26-0x0000000008000000-0x000000000800F000-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

description	pid	Process	procid_target
PID 2872 wrote to memory of 2856	2872	2024-05-11_7cf8d8aab0eada5d7f60d7ab3dabfbe5_cryptolocker.exe	28
PID 2872 wrote to memory of 2856	2872	2024-05-11_7cf8d8aab0eada5d7f60d7ab3dabfbe5_cryptolocker.exe	28
PID 2872 wrote to memory of 2856	2872	2024-05-11_7cf8d8aab0eada5d7f60d7ab3dabfbe5_cryptolocker.exe	28
PID 2872 wrote to memory of 2856	2872	2024-05-11_7cf8d8aab0eada5d7f60d7ab3dabfbe5_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-11_7cf8d8aab0eada5d7f60d7ab3dabfbe5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-11_7cf8d8aab0eada5d7f60d7ab3dabfbe5_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2872
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:2856

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
b2fb5e7dd067148ca6f0303531b4f14c

SHA1
5296a3591e1e030ebdd702bdf3efedf3626eda26

SHA256
e1aa72a220953e1b51d70477e8f2cf330a6784a9292c26fe32f365c6b13dd68f

SHA512
9766a07587986c0c0d9a2b344fc47e00c8063207f35804eb26cf44ecd612fc6ff6ad9abf95bc092727a49fcb49426abc895b0f253509c810690121c4e80a0352

Download Submit
memory/2856-16-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2856-19-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2856-18-0x0000000000580000-0x0000000000586000-memory.dmp

Filesize
24KB

Download
memory/2856-26-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2872-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2872-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2872-3-0x00000000002E0000-0x00000000002E6000-memory.dmp

Filesize
24KB

Download
memory/2872-2-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2872-15-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download