dc9cebb95a27f8281322479e9a6ac8cf940516ccea70baf42a95260ff805042b

Analysis

max time kernel
148s
max time network
154s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
12/02/2024, 04:22

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General

Target

2024-02-12_8b38beaea0fb518e9c429df0c5d4d39b_cryptolocker.exe
Size

82KB
MD5

8b38beaea0fb518e9c429df0c5d4d39b
SHA1

1332d693d4822af682d2184a90877d6b637ae133
SHA256

dc9cebb95a27f8281322479e9a6ac8cf940516ccea70baf42a95260ff805042b
SHA512

d5dab4fd1dba9ba611eff23655500167cc23187615a342ce9ed2aa57890c2a45b522da53a6284bd338ef6b7efe848ca524e1b87a5c73f5df411f934d83df9ab7
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOT7v:T6a+rdOOtEvwDpjNj

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2304-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2304-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x0008000000012223-11.dat	CryptoLocker_rule2
behavioral1/memory/2708-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2708-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2304-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2304-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x0008000000012223-11.dat	CryptoLocker_set1
behavioral1/memory/2708-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2708-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2304-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2304-14-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x0008000000012223-11.dat	UPX
behavioral1/memory/2708-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2708-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2708	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2304	2024-02-12_8b38beaea0fb518e9c429df0c5d4d39b_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2304-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2304-14-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x0008000000012223-11.dat	upx
behavioral1/memory/2708-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2708-26-0x0000000000500000-0x0000000000510000-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 2304 wrote to memory of 2708	2304	2024-02-12_8b38beaea0fb518e9c429df0c5d4d39b_cryptolocker.exe	28
PID 2304 wrote to memory of 2708	2304	2024-02-12_8b38beaea0fb518e9c429df0c5d4d39b_cryptolocker.exe	28
PID 2304 wrote to memory of 2708	2304	2024-02-12_8b38beaea0fb518e9c429df0c5d4d39b_cryptolocker.exe	28
PID 2304 wrote to memory of 2708	2304	2024-02-12_8b38beaea0fb518e9c429df0c5d4d39b_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-12_8b38beaea0fb518e9c429df0c5d4d39b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_8b38beaea0fb518e9c429df0c5d4d39b_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2304
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2708

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
82KB

MD5
72ecff1721fc53a5e036025e8a2f85d6

SHA1
ca3e33cce91dcbd1164b8ab8ec39829ce130fdfc

SHA256
097b6530987ed31aa5353ab603c95d5317b9acdc807cab34588af5010010efd9

SHA512
3258f7d1da6ea08b079547d7a04ee932107378918dc15127976945adc311dbb671a5036f57a2f6af998bd42f351e04efa784045dc6c5ccaea42f6014f65b07c7

Download Submit
memory/2304-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2304-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2304-2-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/2304-5-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2304-14-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2708-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2708-18-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2708-21-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2708-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download