a8af1ab2c8b1f438ccbfff89f08860f4f705da36cc247fb9eb1b5bccf4c1c2fc

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
24/04/2024, 04:44

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General

Target

2024-04-24_d3ff08fd192e342ee350bfd8d8da5270_cryptolocker.exe
Size

38KB
MD5

d3ff08fd192e342ee350bfd8d8da5270
SHA1

3a1dd5019eb77d4bbd94d7657bdaead74ae4e56b
SHA256

a8af1ab2c8b1f438ccbfff89f08860f4f705da36cc247fb9eb1b5bccf4c1c2fc
SHA512

b2b5b8c5f5e6d8086e0b28ffe54439dfb0cfac89dead72c82a83a3e42da020c0483bb64c26a596120972a0ee1eeab95fa19605484987039a1ab99f29be30cff4
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY91:qDdFJy3QMOtEvwDpjjWMl7T+

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/1740-2-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c00000001225d-11.dat	CryptoLocker_rule2
behavioral1/memory/2716-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2716-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral1/memory/1740-2-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c00000001225d-11.dat	CryptoLocker_set1
behavioral1/memory/2716-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2716-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/1740-2-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000c00000001225d-11.dat	UPX
behavioral1/memory/2716-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2716-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2716	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1740	2024-04-24_d3ff08fd192e342ee350bfd8d8da5270_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1740-2-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000c00000001225d-11.dat	upx
behavioral1/memory/2716-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2716-25-0x0000000000500000-0x0000000000510000-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 1740 wrote to memory of 2716	1740	2024-04-24_d3ff08fd192e342ee350bfd8d8da5270_cryptolocker.exe	28
PID 1740 wrote to memory of 2716	1740	2024-04-24_d3ff08fd192e342ee350bfd8d8da5270_cryptolocker.exe	28
PID 1740 wrote to memory of 2716	1740	2024-04-24_d3ff08fd192e342ee350bfd8d8da5270_cryptolocker.exe	28
PID 1740 wrote to memory of 2716	1740	2024-04-24_d3ff08fd192e342ee350bfd8d8da5270_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-24_d3ff08fd192e342ee350bfd8d8da5270_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-24_d3ff08fd192e342ee350bfd8d8da5270_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1740
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2716

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
38KB

MD5
d43d526dc5e173e5d68cf47899a2bcf4

SHA1
6b75c9482214c90a708b3ccb43c52c48156ff18d

SHA256
04aa43222e0cf0cff720810ea103f16e5e9a800021da506729ff347a8c418fac

SHA512
66ae15859bbd248a2ad85c0a4aed8b6ab619f3ce14e9e59369f138845bc0d0a62d200ba3778d40bed38e288a07528abe165a951b912cba751c0369c98b658b45

Download Submit
memory/1740-0-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/1740-2-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1740-1-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/1740-4-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2716-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2716-18-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2716-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download