762ea74dff67dfa50870e41fca55a4d88316725f3b73d3106e5f2d3122fd61b4

Analysis

max time kernel
148s
max time network
151s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
03/06/2024, 12:25

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General

Target

2024-06-03_1aa7bd2470a31a521b37e22e93788acd_cryptolocker.exe
Size

54KB
MD5

1aa7bd2470a31a521b37e22e93788acd
SHA1

4d9cf152b4963dedd0fb2d3a47ceece82247d1c1
SHA256

762ea74dff67dfa50870e41fca55a4d88316725f3b73d3106e5f2d3122fd61b4
SHA512

e405e0a39c1b168dd464f0d46a180371a800f8ddda1f90e7d505a5bf97972daef9905aa68255334139798db06efc428cdc520e23bb2dd5cc251c835d1e222ee8
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTOkgdWz:z6QFElP6n+gKmddpMOtEvwDpj31ikgdQ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/3000-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c00000001228a-11.dat	CryptoLocker_rule2
behavioral1/memory/3000-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2556-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral1/memory/3000-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c00000001228a-11.dat	CryptoLocker_set1
behavioral1/memory/3000-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2556-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/3000-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000c00000001228a-11.dat	UPX
behavioral1/memory/3000-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2556-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2556	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
3000	2024-06-03_1aa7bd2470a31a521b37e22e93788acd_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/3000-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000c00000001228a-11.dat	upx
behavioral1/memory/3000-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2556-25-0x0000000000500000-0x0000000000510000-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 3000 wrote to memory of 2556	3000	2024-06-03_1aa7bd2470a31a521b37e22e93788acd_cryptolocker.exe	28
PID 3000 wrote to memory of 2556	3000	2024-06-03_1aa7bd2470a31a521b37e22e93788acd_cryptolocker.exe	28
PID 3000 wrote to memory of 2556	3000	2024-06-03_1aa7bd2470a31a521b37e22e93788acd_cryptolocker.exe	28
PID 3000 wrote to memory of 2556	3000	2024-06-03_1aa7bd2470a31a521b37e22e93788acd_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-06-03_1aa7bd2470a31a521b37e22e93788acd_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_1aa7bd2470a31a521b37e22e93788acd_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3000
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2556

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
54KB

MD5
2cc3a64f0c807f1e952cebb534cde807

SHA1
60e73584940d26023835d5b0c69c0ce423735381

SHA256
aaa044427155fe966d75e260fb2f70818f5159c1505e4a7358b30d151509a079

SHA512
d719d30225bd1f657baba2f545a76e3f985d93218a89d23d20038354f3692e21cacde5975477712bd180df20295ab56e08aae49a4ef11b8998f109bdb42f7c37

Download Submit
memory/2556-24-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2556-17-0x0000000000610000-0x0000000000616000-memory.dmp

Filesize
24KB

Download
memory/2556-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3000-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3000-1-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/3000-9-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/3000-2-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/3000-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download