d3e2d9b77dad8d5d6c2c6894212a7d62cd5e2bb0dcea3d7fbc0531fa43ffef94

Analysis

max time kernel
147s
max time network
148s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
04-06-2024 11:59

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General

Target

2024-06-04_f3eea9f79af965e08d4f03f71cee8675_cryptolocker.exe
Size

76KB
MD5

f3eea9f79af965e08d4f03f71cee8675
SHA1

8865cd5ecf90aa632738f799fc61d476cf622b09
SHA256

d3e2d9b77dad8d5d6c2c6894212a7d62cd5e2bb0dcea3d7fbc0531fa43ffef94
SHA512

22416200237a80fc82c11ccf247f734eeaf449625c8bd9935b3ac0a76e50e0dc4aa8124aa37a52ae286f401a4c6673793b5abe0ec1c6912965967e624abefe68
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsal81GW:1nK6a+qdOOtEvwDpjX

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1640-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a000000015cb1-15.dat	CryptoLocker_rule2
behavioral1/memory/1640-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2604-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2604-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1640-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000a000000015cb1-15.dat	CryptoLocker_set1
behavioral1/memory/1640-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2604-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2604-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1640-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000a000000015cb1-15.dat	UPX
behavioral1/memory/1640-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2604-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2604-27-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2604	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1640	2024-06-04_f3eea9f79af965e08d4f03f71cee8675_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1640-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000a000000015cb1-15.dat	upx
behavioral1/memory/1640-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2604-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2604-27-0x0000000000500000-0x000000000050F311-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 1640 wrote to memory of 2604	1640	2024-06-04_f3eea9f79af965e08d4f03f71cee8675_cryptolocker.exe	28
PID 1640 wrote to memory of 2604	1640	2024-06-04_f3eea9f79af965e08d4f03f71cee8675_cryptolocker.exe	28
PID 1640 wrote to memory of 2604	1640	2024-06-04_f3eea9f79af965e08d4f03f71cee8675_cryptolocker.exe	28
PID 1640 wrote to memory of 2604	1640	2024-06-04_f3eea9f79af965e08d4f03f71cee8675_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-06-04_f3eea9f79af965e08d4f03f71cee8675_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-04_f3eea9f79af965e08d4f03f71cee8675_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1640
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2604

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

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
76KB

MD5
b2395b207f6a6f3b2cc112a29a27fa47

SHA1
f274fcddf8b1a9ade7d298ccc78e0c7f5383d275

SHA256
8789c9a4d412ffcaa6b89a29787f2bab999370fce4a05d6973a3129bec1ebefb

SHA512
d180843b17ec855d6564875133666e398710776ff13680d7af7fa0a081a92f4c0d29c7104f69d3ed55479d2e2907c19edf536d11f761f4d25d4222bebb915c6d

Download Submit
memory/1640-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1640-1-0x00000000001C0000-0x00000000001C6000-memory.dmp

Filesize
24KB

Download
memory/1640-2-0x00000000003F0000-0x00000000003F6000-memory.dmp

Filesize
24KB

Download
memory/1640-9-0x00000000001C0000-0x00000000001C6000-memory.dmp

Filesize
24KB

Download
memory/1640-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1640-14-0x0000000002840000-0x0000000002850000-memory.dmp

Filesize
64KB

Download
memory/2604-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2604-19-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2604-26-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2604-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download