84d641264efdd82151f9a1daa5e493787b941e03d5fd96c1de57e2d02c46e573

Analysis

max time kernel
149s
max time network
153s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
15-05-2024 15:21

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General

Target

2024-05-15_03fbcff82557a3836f6dd236fd483fd3_cryptolocker.exe
Size

43KB
MD5

03fbcff82557a3836f6dd236fd483fd3
SHA1

a8605561a201cadf7c5761bd97d706bfa878425d
SHA256

84d641264efdd82151f9a1daa5e493787b941e03d5fd96c1de57e2d02c46e573
SHA512

13d710c4e608bef8a130afed8926e4d2204968e8dd671ad3af0ea848f664de297a808687fc6839d34b5a9ce224b865102024d3f990b73c126799007a26dc6f19
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAHRY:bCDOw9aMDooc+vAxY

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2276-1-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d00000001231a-11.dat	CryptoLocker_rule2
behavioral1/memory/2276-13-0x0000000002160000-0x000000000216A000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2276-16-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2952-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2952-27-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2952	lossy.exe

Loads dropped DLL 1 IoCs

pid	Process
2276	2024-05-15_03fbcff82557a3836f6dd236fd483fd3_cryptolocker.exe

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 2276 wrote to memory of 2952	2276	2024-05-15_03fbcff82557a3836f6dd236fd483fd3_cryptolocker.exe	28
PID 2276 wrote to memory of 2952	2276	2024-05-15_03fbcff82557a3836f6dd236fd483fd3_cryptolocker.exe	28
PID 2276 wrote to memory of 2952	2276	2024-05-15_03fbcff82557a3836f6dd236fd483fd3_cryptolocker.exe	28
PID 2276 wrote to memory of 2952	2276	2024-05-15_03fbcff82557a3836f6dd236fd483fd3_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-15_03fbcff82557a3836f6dd236fd483fd3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-15_03fbcff82557a3836f6dd236fd483fd3_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2276
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:2952

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
43KB

MD5
f584a3fab304811c8cac53e2fdf70919

SHA1
746a65c9dbfafffc8800a76280af89349daea53d

SHA256
870cb2f2e740b824f1e27bbaff63aa4b49a8e09324a1a018b5fb2c07012f53da

SHA512
2eca201028f51e9b3becb668c3abf3bddcce87deafcea92896c2ed39624607ed68ae9949ea94daa43668c570d532bb23f69d66fc8742b885f92b66884f36a66e

Download Submit
memory/2276-0-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2276-1-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/2276-2-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2276-3-0x00000000020A0000-0x00000000020A6000-memory.dmp

Filesize
24KB

Download
memory/2276-13-0x0000000002160000-0x000000000216A000-memory.dmp

Filesize
40KB

Download
memory/2276-16-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/2952-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/2952-19-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/2952-26-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/2952-27-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download