7be34d8af7ae5e4eee23bb429d0bb16e46545409139146781302f5e50239e8c6

Analysis

max time kernel
148s
max time network
153s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
23-02-2024 05:04

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General

Target

2024-02-23_de5e1c34fab11f7ec44bb8bd059bae91_cryptolocker.exe
Size

35KB
MD5

de5e1c34fab11f7ec44bb8bd059bae91
SHA1

007486c86fb610cabd4f397892df7daab633c821
SHA256

7be34d8af7ae5e4eee23bb429d0bb16e46545409139146781302f5e50239e8c6
SHA512

03600ec3ddfb99c2013a6f1795bfef10e203a481d9ee429a79a36b68c4f67c427fc5291cba8f92079296361ef30f4d4e04e6ff421a5529ea02ee7c56c0557ced
SSDEEP

768:qUmnjFom/kLyMro2GtOOtEvwDpjeMLam5ax+j:qUmnpomddpMOtEvwDpjjaYai

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2004-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000900000001222c-16.dat	CryptoLocker_rule2
behavioral1/memory/2004-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2256-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2256-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2004-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000900000001222c-16.dat	CryptoLocker_set1
behavioral1/memory/2004-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2256-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2256-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2004-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000900000001222c-16.dat	UPX
behavioral1/memory/2004-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2256-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2256-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2256	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2004	2024-02-23_de5e1c34fab11f7ec44bb8bd059bae91_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2004-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000900000001222c-16.dat	upx
behavioral1/memory/2004-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2256-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2256-27-0x0000000000500000-0x000000000050F000-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 2004 wrote to memory of 2256	2004	2024-02-23_de5e1c34fab11f7ec44bb8bd059bae91_cryptolocker.exe	28
PID 2004 wrote to memory of 2256	2004	2024-02-23_de5e1c34fab11f7ec44bb8bd059bae91_cryptolocker.exe	28
PID 2004 wrote to memory of 2256	2004	2024-02-23_de5e1c34fab11f7ec44bb8bd059bae91_cryptolocker.exe	28
PID 2004 wrote to memory of 2256	2004	2024-02-23_de5e1c34fab11f7ec44bb8bd059bae91_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-23_de5e1c34fab11f7ec44bb8bd059bae91_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-23_de5e1c34fab11f7ec44bb8bd059bae91_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:2256

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
35KB

MD5
e5902bbf7775166c2f39be5c29b7688b

SHA1
3b8ddb11fa3a791103568be3acd033a9353612f7

SHA256
5f7027c25787d4f81d66771c0938409c9ff65f586010389bce71ac88564acd5c

SHA512
912890a9e6c2d779334828c95bacc0d93dc01560827cd2011be65b0d3c553a4ad5242f84452810872d1196b10eff03b6092dc88d75ed504d90bdcdc8f7058070

Download Submit
memory/2004-1-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2004-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2004-2-0x0000000000490000-0x0000000000496000-memory.dmp

Filesize
24KB

Download
memory/2004-3-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2004-14-0x00000000025C0000-0x00000000025CF000-memory.dmp

Filesize
60KB

Download
memory/2004-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2256-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2256-19-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/2256-26-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2256-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download