727609a7662ef071dfcdac5f6da70bef6e00df00d980c72801b74d91d190a82c

Analysis

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

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
22-05-2024 23:27

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General

Target

2024-05-22_c5452caa39a276d9f919cab0ac0ae112_cryptolocker.exe
Size

52KB
MD5

c5452caa39a276d9f919cab0ac0ae112
SHA1

f4c3e2aa88e069fda0245ecdf00e9eec32c13353
SHA256

727609a7662ef071dfcdac5f6da70bef6e00df00d980c72801b74d91d190a82c
SHA512

73fccc2f75b0b4937e9878dc9f7887631b3fdeb8d29233c48df5f1621d1040494d6c01943a6b3ab98c3a6b7990313c66a8ddfe77952199182419f0da3469e79c
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOn6:bODOw9acifAoc+vs6

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1684-1-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\lossy.exe	CryptoLocker_rule2
behavioral1/memory/2340-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1684-14-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2340-28-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1684-1-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\lossy.exe	UPX
behavioral1/memory/2340-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/1684-14-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/2340-28-0x0000000008000000-0x000000000800F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

lossy.exe

pid process

2340 lossy.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_c5452caa39a276d9f919cab0ac0ae112_cryptolocker.exe

pid process

1684 2024-05-22_c5452caa39a276d9f919cab0ac0ae112_cryptolocker.exe

pid	process
2340	lossy.exe

pid	process
1684	2024-05-22_c5452caa39a276d9f919cab0ac0ae112_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1684-1-0x0000000008000000-0x000000000800F000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\lossy.exe	upx
behavioral1/memory/2340-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/1684-14-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/2340-28-0x0000000008000000-0x000000000800F000-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

Processes:

2024-05-22_c5452caa39a276d9f919cab0ac0ae112_cryptolocker.exe

description	pid	process	target process
PID 1684 wrote to memory of 2340	1684	2024-05-22_c5452caa39a276d9f919cab0ac0ae112_cryptolocker.exe	lossy.exe
PID 1684 wrote to memory of 2340	1684	2024-05-22_c5452caa39a276d9f919cab0ac0ae112_cryptolocker.exe	lossy.exe
PID 1684 wrote to memory of 2340	1684	2024-05-22_c5452caa39a276d9f919cab0ac0ae112_cryptolocker.exe	lossy.exe
PID 1684 wrote to memory of 2340	1684	2024-05-22_c5452caa39a276d9f919cab0ac0ae112_cryptolocker.exe	lossy.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_c5452caa39a276d9f919cab0ac0ae112_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_c5452caa39a276d9f919cab0ac0ae112_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1684

C:\Users\Admin\AppData\Local\Temp\lossy.exe
"C:\Users\Admin\AppData\Local\Temp\lossy.exe"
2⤵
- Executes dropped EXE
PID:2340

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
52KB

MD5
5b994edd22216e1cdd4144ccc400fa06

SHA1
657bd55c464ef48f6687b9d21dbcd5901432f39a

SHA256
4e8dc5129cb241640b84ddc7b8ecfbbee2678b12f4924a08ab578c16ae062451

SHA512
aecc513fa67872e6c65818acceb442011142e445eee3eb0661c72d0ce4a8f00856e5bd0e4d02291d2f5414135ea73e6a209bf27dffe8ad7e8c3aa0f51a7fd3c8

Download Submit
memory/1684-1-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/1684-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1684-2-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/1684-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1684-15-0x00000000004F0000-0x00000000004FF000-memory.dmp

Filesize
60KB

Download
memory/1684-14-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/1684-27-0x00000000004F0000-0x00000000004FF000-memory.dmp

Filesize
60KB

Download
memory/2340-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2340-26-0x00000000003B0000-0x00000000003B6000-memory.dmp

Filesize
24KB

Download
memory/2340-19-0x00000000003F0000-0x00000000003F6000-memory.dmp

Filesize
24KB

Download
memory/2340-28-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download