cc661d80c06303c789a2200af731449d42c423abf9dbff4d0dad48b5d8f2f470

Analysis

max time kernel
150s
max time network
149s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
14/05/2024, 19:33

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General

Target

2024-05-14_65e1a94fa9c0229badc491fa3f7baf5a_cryptolocker.exe
Size

51KB
MD5

65e1a94fa9c0229badc491fa3f7baf5a
SHA1

e337dfad17b3b6b66f88055c94d47b8a320c9cf7
SHA256

cc661d80c06303c789a2200af731449d42c423abf9dbff4d0dad48b5d8f2f470
SHA512

7724335d22d882c7ee1c5dad948585af1a766b7290aecd1b8ef9fa5b955ec5a18d3bd4ccd5d3d15ff31ee8447693b0dab9c06cc58201bcd1e70caa5de6754bd8
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtO9:bODOw9acifAoc+v6

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2580-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000012286-11.dat	CryptoLocker_rule2
behavioral1/memory/2580-15-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2680-16-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2680-26-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2580-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/files/0x000b000000012286-11.dat	UPX
behavioral1/memory/2580-15-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/2680-16-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/2680-26-0x0000000008000000-0x000000000800F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2680	lossy.exe

Loads dropped DLL 1 IoCs

pid	Process
2580	2024-05-14_65e1a94fa9c0229badc491fa3f7baf5a_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2580-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/files/0x000b000000012286-11.dat	upx
behavioral1/memory/2580-15-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/2680-16-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/2680-26-0x0000000008000000-0x000000000800F000-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 2580 wrote to memory of 2680	2580	2024-05-14_65e1a94fa9c0229badc491fa3f7baf5a_cryptolocker.exe	28
PID 2580 wrote to memory of 2680	2580	2024-05-14_65e1a94fa9c0229badc491fa3f7baf5a_cryptolocker.exe	28
PID 2580 wrote to memory of 2680	2580	2024-05-14_65e1a94fa9c0229badc491fa3f7baf5a_cryptolocker.exe	28
PID 2580 wrote to memory of 2680	2580	2024-05-14_65e1a94fa9c0229badc491fa3f7baf5a_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-14_65e1a94fa9c0229badc491fa3f7baf5a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-14_65e1a94fa9c0229badc491fa3f7baf5a_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2580
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:2680

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\lossy.exe

Filesize
51KB

MD5
a85f409192332a4f5e0ccf2c70324c38

SHA1
75cdd9b08a74e07b29cbdc5791b20e0379f60dbd

SHA256
dc5e8db259bbb9a3f215066997cd980fd748dc51134cb2e30b57231bcbf14b7d

SHA512
8a87464c8006b3322495bf59a96e8cd0c9e57c855eec170f259f27bd272ed3015828699f7c5fd584a9bcb5e01deb10eebc7a4931b089dbd641a49707025b9d9b

Download Submit
memory/2580-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2580-1-0x00000000001C0000-0x00000000001C6000-memory.dmp

Filesize
24KB

Download
memory/2580-2-0x00000000003F0000-0x00000000003F6000-memory.dmp

Filesize
24KB

Download
memory/2580-9-0x00000000001C0000-0x00000000001C6000-memory.dmp

Filesize
24KB

Download
memory/2580-15-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2680-16-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2680-25-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/2680-18-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/2680-26-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download