71feefca8da5f3558fe915cc5c6e490b8463d3334659dd998a2fa4b75d250156

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
23/02/2024, 04:42

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General

Target

2024-02-23_1b94c4bdc8f7458ecaae08806c73eb95_cryptolocker.exe
Size

99KB
MD5

1b94c4bdc8f7458ecaae08806c73eb95
SHA1

527b6438147888bcc26e6ae0e52018fa34d504a0
SHA256

71feefca8da5f3558fe915cc5c6e490b8463d3334659dd998a2fa4b75d250156
SHA512

0f75893c882275a1b4ec730ea2df88dcc9dedb57482c04289c465d8de43f8e8d62e264bde88ded73911e978521f444f775d49a78e7cf07385a4a4687c55e3983
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpwqWsviPeOs:AnBdOOtEvwDpj6zq

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1804-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x00080000000122bf-11.dat	CryptoLocker_rule2
behavioral1/memory/1804-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3068-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3068-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1804-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x00080000000122bf-11.dat	CryptoLocker_set1
behavioral1/memory/1804-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3068-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3068-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1804-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x00080000000122bf-11.dat	UPX
behavioral1/memory/1804-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/3068-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/3068-25-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3068	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1804	2024-02-23_1b94c4bdc8f7458ecaae08806c73eb95_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1804-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x00080000000122bf-11.dat	upx
behavioral1/memory/1804-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/3068-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/3068-25-0x0000000000500000-0x000000000050F000-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 1804 wrote to memory of 3068	1804	2024-02-23_1b94c4bdc8f7458ecaae08806c73eb95_cryptolocker.exe	28
PID 1804 wrote to memory of 3068	1804	2024-02-23_1b94c4bdc8f7458ecaae08806c73eb95_cryptolocker.exe	28
PID 1804 wrote to memory of 3068	1804	2024-02-23_1b94c4bdc8f7458ecaae08806c73eb95_cryptolocker.exe	28
PID 1804 wrote to memory of 3068	1804	2024-02-23_1b94c4bdc8f7458ecaae08806c73eb95_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-23_1b94c4bdc8f7458ecaae08806c73eb95_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-23_1b94c4bdc8f7458ecaae08806c73eb95_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1804
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3068

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
99KB

MD5
48f7f6abc1b8f914c5a4deb6ccb0c0b9

SHA1
0448ecc77a0cd5246036dadc390f9cc2bdf9f8e8

SHA256
88bbf54056bce64916ca8e943bdb63048938d3b54d2e591ebe9d30392ed9d790

SHA512
3d58b3d9630cf8ec64027231d16a4c1e2226eb961e947f4d1f2aa1336a69d5d96f9c52e7f26c1ff77e653043389a329388edc52be5f6bb5e67995fc43f099e9d

Download Submit
memory/1804-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1804-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1804-2-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1804-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1804-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3068-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3068-18-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/3068-25-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download