b96729b25e0d612caf93052f720d7864e07ad7387fdc0b091b4c21d94686307d

Analysis

max time kernel
149s
max time network
141s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
09/04/2024, 06:38

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General

Target

2024-04-09_8a79df9136f7f045cbf7b1802cee650c_cryptolocker.exe
Size

63KB
MD5

8a79df9136f7f045cbf7b1802cee650c
SHA1

8ffc1df5e3d0eb3a7156b29167f915214a2400d5
SHA256

b96729b25e0d612caf93052f720d7864e07ad7387fdc0b091b4c21d94686307d
SHA512

7b9109275f06d43b00de8f1d4010ca774899a57f3b946399c035a96fa5a89f566314846082b2c0742790ff65f35cfc0162d7c6ceebca6a30c45895c999c7aaad
SSDEEP

768:P8mnjO6LsoEEeegiZPvEhHSG+gbum/kLyMro2GtOOtEvwDpjKvWxHCbSVaFn0jKr:P8mnK6QFElP6n+gymddpMOtEvwDpjYd

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1756-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d000000012267-11.dat	CryptoLocker_rule2
behavioral1/memory/1756-15-0x0000000000500000-0x000000000050F311-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/1756-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000d000000012267-11.dat	CryptoLocker_set1
behavioral1/memory/1756-15-0x0000000000500000-0x000000000050F311-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/1756-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000d000000012267-11.dat	UPX
behavioral1/memory/1756-15-0x0000000000500000-0x000000000050F311-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
1756	2024-04-09_8a79df9136f7f045cbf7b1802cee650c_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1756-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000d000000012267-11.dat	upx
behavioral1/memory/1756-15-0x0000000000500000-0x000000000050F311-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 1756 wrote to memory of 2604	1756	2024-04-09_8a79df9136f7f045cbf7b1802cee650c_cryptolocker.exe	28
PID 1756 wrote to memory of 2604	1756	2024-04-09_8a79df9136f7f045cbf7b1802cee650c_cryptolocker.exe	28
PID 1756 wrote to memory of 2604	1756	2024-04-09_8a79df9136f7f045cbf7b1802cee650c_cryptolocker.exe	28
PID 1756 wrote to memory of 2604	1756	2024-04-09_8a79df9136f7f045cbf7b1802cee650c_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-09_8a79df9136f7f045cbf7b1802cee650c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-09_8a79df9136f7f045cbf7b1802cee650c_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1756
- 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

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

Filesize
63KB

MD5
d2615f890b4ae520093740aff8da7abc

SHA1
208d55e59a948728eb065eb540ef0af30005a02a

SHA256
16410b496f6635091928ad776df55b3ad302a29a9964239f3d4a136d9b46e17a

SHA512
3cd293620f3908212fe42b5a626727cd0700fadfa6c6a0eb4f01147d105a225934a42db5f628f9e4cd50a42b02c5e44578ae5324c65d726eb509a91e3771762a

Download Submit
memory/1756-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1756-1-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/1756-2-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/1756-4-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/1756-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1756-14-0x0000000002800000-0x0000000002810000-memory.dmp

Filesize
64KB

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

Filesize
60KB

Download
memory/2604-19-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/2604-21-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

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

Filesize
60KB

Download