439302202291b9ae3d355f07e2475b94f07e8dc78cd8aaa5ef111d65d0e0fc0d

Analysis

max time kernel
147s
max time network
148s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
07/05/2024, 04:23

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General

Target

2024-05-07_04ea121bbad6121860560c0eccfb1fdc_cryptolocker.exe
Size

38KB
MD5

04ea121bbad6121860560c0eccfb1fdc
SHA1

fc8f5ca692cf2fd2aaa107d1c1566bb682a885a1
SHA256

439302202291b9ae3d355f07e2475b94f07e8dc78cd8aaa5ef111d65d0e0fc0d
SHA512

35841380460d49606eb6c42d07eae0f380518c0d2eade102558003365fac6909918d69a543317a2f26372ec6774857b2de2287d27084a7fcb3018e7aff252e71
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY/g:qDdFJy3QMOtEvwDpjjWMl7Tmg

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1748-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b0000000149f5-11.dat	CryptoLocker_rule2
behavioral1/memory/1748-13-0x00000000022A0000-0x00000000022B0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1748-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2164-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1748-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b0000000149f5-11.dat	CryptoLocker_set1
behavioral1/memory/1748-13-0x00000000022A0000-0x00000000022B0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1748-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2164-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1748-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b0000000149f5-11.dat	UPX
behavioral1/memory/1748-13-0x00000000022A0000-0x00000000022B0000-memory.dmp	UPX
behavioral1/memory/1748-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2164-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2164	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1748	2024-05-07_04ea121bbad6121860560c0eccfb1fdc_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1748-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b0000000149f5-11.dat	upx
behavioral1/memory/1748-13-0x00000000022A0000-0x00000000022B0000-memory.dmp	upx
behavioral1/memory/1748-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2164-27-0x0000000000500000-0x0000000000510000-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 1748 wrote to memory of 2164	1748	2024-05-07_04ea121bbad6121860560c0eccfb1fdc_cryptolocker.exe	28
PID 1748 wrote to memory of 2164	1748	2024-05-07_04ea121bbad6121860560c0eccfb1fdc_cryptolocker.exe	28
PID 1748 wrote to memory of 2164	1748	2024-05-07_04ea121bbad6121860560c0eccfb1fdc_cryptolocker.exe	28
PID 1748 wrote to memory of 2164	1748	2024-05-07_04ea121bbad6121860560c0eccfb1fdc_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-07_04ea121bbad6121860560c0eccfb1fdc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-07_04ea121bbad6121860560c0eccfb1fdc_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1748
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2164

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
32000ad4ef8bd62c6225cdac0406eee8

SHA1
06ef73644ee8742b888368e4cfe97f884f7c9f55

SHA256
39015a5ece91a2831ee0abd6c6284c8613e047684d7d950d2649ba5a29cf6667

SHA512
2c83e00fedbb03e134e3f673930f78e416f2773e77fe287cbf6e961089ea9c43952c75a0b3f63f43bd57eb219e8cd3fa4794a3807032325da22fa8b2dd440550

Download Submit
memory/1748-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1748-1-0x0000000000330000-0x0000000000336000-memory.dmp

Filesize
24KB

Download
memory/1748-2-0x00000000004B0000-0x00000000004B6000-memory.dmp

Filesize
24KB

Download
memory/1748-9-0x0000000000330000-0x0000000000336000-memory.dmp

Filesize
24KB

Download
memory/1748-13-0x00000000022A0000-0x00000000022B0000-memory.dmp

Filesize
64KB

Download
memory/1748-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2164-19-0x00000000002A0000-0x00000000002A6000-memory.dmp

Filesize
24KB

Download
memory/2164-26-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2164-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download