36ab2cd0d489b4d79efa7292df71ff36203d8e61e1cc4a5efe8b92089601d1ee

Analysis

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

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
23/02/2024, 06:19

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General

Target

2024-02-23_c227cf3eabb75fcc5387f34ab375a635_cryptolocker.exe
Size

107KB
MD5

c227cf3eabb75fcc5387f34ab375a635
SHA1

360e635d73c833c08856596c71de6ef21cc108b8
SHA256

36ab2cd0d489b4d79efa7292df71ff36203d8e61e1cc4a5efe8b92089601d1ee
SHA512

b0427614146d3c2ec5b3dca11611930f6db0a8719491e565c2868afc32ea93af0fa546db039273725bd6bb7a215e0b7681eea4c2aeb2e754c8733655f6ce6a78
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6GkszfK:1nK6a+qdOOtEvwDpjm

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2004-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c000000012339-11.dat	CryptoLocker_rule2
behavioral1/memory/2004-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3020-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3020-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2004-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c000000012339-11.dat	CryptoLocker_set1
behavioral1/memory/2004-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/3020-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/3020-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2004-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000c000000012339-11.dat	UPX
behavioral1/memory/2004-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/3020-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/3020-27-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3020	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2004	2024-02-23_c227cf3eabb75fcc5387f34ab375a635_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2004-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000c000000012339-11.dat	upx
behavioral1/memory/2004-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/3020-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/3020-27-0x0000000000500000-0x000000000050F311-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 2004 wrote to memory of 3020	2004	2024-02-23_c227cf3eabb75fcc5387f34ab375a635_cryptolocker.exe	28
PID 2004 wrote to memory of 3020	2004	2024-02-23_c227cf3eabb75fcc5387f34ab375a635_cryptolocker.exe	28
PID 2004 wrote to memory of 3020	2004	2024-02-23_c227cf3eabb75fcc5387f34ab375a635_cryptolocker.exe	28
PID 2004 wrote to memory of 3020	2004	2024-02-23_c227cf3eabb75fcc5387f34ab375a635_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-23_c227cf3eabb75fcc5387f34ab375a635_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-23_c227cf3eabb75fcc5387f34ab375a635_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2004
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3020

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
107KB

MD5
a8aa1d0029a1755297cf257dc0d2b019

SHA1
c7b9f6da3c8aebffe0258e61689fd833afa53dc8

SHA256
6ebd316bdac98b48e6078acb1855d7a92f6e65888bff09113bee0dc7a813e00b

SHA512
743303ed75963b0419d3eecdc669d6d4c1ed379d4f6e95ad787809ec5c76960771df51aee73d5fbba8169bc28aceef33cce3975d66bdeab09c82dcf2bff12a89

Download Submit
memory/2004-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2004-1-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2004-3-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2004-2-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2004-16-0x0000000002BC0000-0x0000000002BD0000-memory.dmp

Filesize
64KB

Download
memory/2004-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3020-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3020-19-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/3020-26-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/3020-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download