abef61aa480af3056ddb80ba152e8dee0b5f3d13d288e760c6b766fe45c4cfde

Analysis

max time kernel
149s
max time network
155s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
22/02/2024, 19:34

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General

Target

2024-02-22_4cf2a61eee5e341a99c27f510f6d4e8a_cryptolocker.exe
Size

87KB
MD5

4cf2a61eee5e341a99c27f510f6d4e8a
SHA1

c30e533605cc5fc78bda1dc58de1ee561931ca13
SHA256

abef61aa480af3056ddb80ba152e8dee0b5f3d13d288e760c6b766fe45c4cfde
SHA512

b0f6315397d8bfa6b0879c7b61583434186f81ccb552946d33a7634006a8646dc1c8834ce66dc2f47c7ecb5d4433c15deb9988cf33837feea15a53a84d1d6a19
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgSv:AnBdOOtEvwDpj6zW

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2684-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000012257-11.dat	CryptoLocker_rule2
behavioral1/memory/2684-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2548-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2548-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2684-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000012257-11.dat	CryptoLocker_set1
behavioral1/memory/2684-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2548-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2548-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2684-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000b000000012257-11.dat	UPX
behavioral1/memory/2684-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2548-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2548-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2548	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2684	2024-02-22_4cf2a61eee5e341a99c27f510f6d4e8a_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2684-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000b000000012257-11.dat	upx
behavioral1/memory/2684-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2548-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2548-26-0x0000000000500000-0x000000000050F000-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 2684 wrote to memory of 2548	2684	2024-02-22_4cf2a61eee5e341a99c27f510f6d4e8a_cryptolocker.exe	28
PID 2684 wrote to memory of 2548	2684	2024-02-22_4cf2a61eee5e341a99c27f510f6d4e8a_cryptolocker.exe	28
PID 2684 wrote to memory of 2548	2684	2024-02-22_4cf2a61eee5e341a99c27f510f6d4e8a_cryptolocker.exe	28
PID 2684 wrote to memory of 2548	2684	2024-02-22_4cf2a61eee5e341a99c27f510f6d4e8a_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-22_4cf2a61eee5e341a99c27f510f6d4e8a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-22_4cf2a61eee5e341a99c27f510f6d4e8a_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2684
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2548

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\asih.exe

Filesize
88KB

MD5
04bff620c9452ad5b8eca1cb99601156

SHA1
65a770623fb5cec019f0e9e2d59efc363b12b3e9

SHA256
f30249e9092e68124efc930ca314fc5bc7ad3f03bf1d57e0b0c818364edf5ece

SHA512
4d94d75dc57ceded396acd4c5ca11e6cad0e14c91adf0a2dfa04ba89c61b0d3cc025d2926d855254fc733d7d669d67b5b77d729aa346d92dcbac1864d2b8b4a6

Download Submit
memory/2548-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2548-18-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/2548-25-0x00000000001C0000-0x00000000001C6000-memory.dmp

Filesize
24KB

Download
memory/2548-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2684-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2684-1-0x00000000001E0000-0x00000000001E6000-memory.dmp

Filesize
24KB

Download
memory/2684-2-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2684-4-0x00000000001E0000-0x00000000001E6000-memory.dmp

Filesize
24KB

Download
memory/2684-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download