2acb3e173c635cf1adb8cb0dbd3ef562800aa713b77bce69960e39d84b6d4916

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
23/05/2024, 21:08

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General

Target

2024-05-23_7ca5acf262d0b3c77ed9dd84a0c89e85_cryptolocker.exe
Size

40KB
MD5

7ca5acf262d0b3c77ed9dd84a0c89e85
SHA1

f0fc71b92d8677d214dfb0f675b4f3d27bff5462
SHA256

2acb3e173c635cf1adb8cb0dbd3ef562800aa713b77bce69960e39d84b6d4916
SHA512

a64085db74687fcc8cbd72530f67866c899df84fc32f0441c70178dfaa72a2f939371f734421ce23b212533372fc5947e45f6ca7a734a5a5165d2813eb37c30d
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYoq:qDdFJy3QMOtEvwDpjjWMl7Tlq

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2360-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a000000015f7a-11.dat	CryptoLocker_rule2
behavioral1/memory/2360-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2660-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral1/memory/2360-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000a000000015f7a-11.dat	CryptoLocker_set1
behavioral1/memory/2360-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2660-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/2360-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000a000000015f7a-11.dat	UPX
behavioral1/memory/2360-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2660-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2660	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2360	2024-05-23_7ca5acf262d0b3c77ed9dd84a0c89e85_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2360-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000a000000015f7a-11.dat	upx
behavioral1/memory/2360-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2660-27-0x0000000000500000-0x0000000000510000-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 2360 wrote to memory of 2660	2360	2024-05-23_7ca5acf262d0b3c77ed9dd84a0c89e85_cryptolocker.exe	28
PID 2360 wrote to memory of 2660	2360	2024-05-23_7ca5acf262d0b3c77ed9dd84a0c89e85_cryptolocker.exe	28
PID 2360 wrote to memory of 2660	2360	2024-05-23_7ca5acf262d0b3c77ed9dd84a0c89e85_cryptolocker.exe	28
PID 2360 wrote to memory of 2660	2360	2024-05-23_7ca5acf262d0b3c77ed9dd84a0c89e85_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-23_7ca5acf262d0b3c77ed9dd84a0c89e85_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_7ca5acf262d0b3c77ed9dd84a0c89e85_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2360
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2660

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
40KB

MD5
a193056f526fb0900cc4e6008e22f8c4

SHA1
038c55ef187910eb1593314bcb1bcc7408d50d1f

SHA256
3029e876cf760bc7da1dc5cb7beeb226240d5aaed8738a76152d9cfe956943c4

SHA512
cba67ec422ea1bb07a1e2271e273f378e3215ffbedb2e96d4fb9f2498fe6f7d3e4d9208e4c08b5cc32c32f19696cdd65291f13653d1cc8e751c223b8e058ca81

Download Submit
memory/2360-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2360-1-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2360-2-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/2360-9-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2360-15-0x0000000000410000-0x0000000000420000-memory.dmp

Filesize
64KB

Download
memory/2360-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2660-26-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2660-19-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2660-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download