fa1cb6e51aef9557496cd1cdfd43dc0f414dd356f68cb45788e49d4de0ed5245

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
20/05/2024, 06:35

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General

Target

2024-05-20_4f2f7c79ad5317e16f18d2bde3ee64bf_cryptolocker.exe
Size

52KB
MD5

4f2f7c79ad5317e16f18d2bde3ee64bf
SHA1

53178e6f019b4d0d38b92cc2ce33ee7394dbc5a0
SHA256

fa1cb6e51aef9557496cd1cdfd43dc0f414dd356f68cb45788e49d4de0ed5245
SHA512

59e2dce81dbc81d3f115298f4dc3cb05163d6b5e5d4bc62d45d41beef676688dee408174c161fddc348bd32f087af791caeb3970383ddca7b712beaad44a84be
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOO:bODOw9acifAoc+vB

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2196-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000015ca5-11.dat	CryptoLocker_rule2
behavioral1/memory/2196-15-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2532-16-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2532-26-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2196-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/files/0x000b000000015ca5-11.dat	UPX
behavioral1/memory/2196-15-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/2532-16-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/2532-26-0x0000000008000000-0x000000000800F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2532	lossy.exe

Loads dropped DLL 1 IoCs

pid	Process
2196	2024-05-20_4f2f7c79ad5317e16f18d2bde3ee64bf_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2196-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/files/0x000b000000015ca5-11.dat	upx
behavioral1/memory/2196-15-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/2532-16-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/2532-26-0x0000000008000000-0x000000000800F000-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 2196 wrote to memory of 2532	2196	2024-05-20_4f2f7c79ad5317e16f18d2bde3ee64bf_cryptolocker.exe	28
PID 2196 wrote to memory of 2532	2196	2024-05-20_4f2f7c79ad5317e16f18d2bde3ee64bf_cryptolocker.exe	28
PID 2196 wrote to memory of 2532	2196	2024-05-20_4f2f7c79ad5317e16f18d2bde3ee64bf_cryptolocker.exe	28
PID 2196 wrote to memory of 2532	2196	2024-05-20_4f2f7c79ad5317e16f18d2bde3ee64bf_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-20_4f2f7c79ad5317e16f18d2bde3ee64bf_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-20_4f2f7c79ad5317e16f18d2bde3ee64bf_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2196
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:2532

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
0caa521bd794e19e0f935571661c62db

SHA1
4d9b34fd0e0df5a01d0067c3185bb31db4c709e7

SHA256
0181b70b1538e988ea1969ae7c6f3b4fb8c4002fa3ff60ba6a9dad412b56a96c

SHA512
d8c2cc2e7d325ba3d9acd4f3d495490ee31b44e06d37ada6cf1df2aac72db28d2d7c1d1681e0f591d480a64f3771e8e6f591ec5e86a882e855d2a43a62e68358

Download Submit
memory/2196-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2196-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2196-2-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2196-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2196-15-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2532-16-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2532-18-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2532-25-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2532-26-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download