c9037d56250b2d6a329b4ac71ca28ad0abbc764f46c19ef9ed5e856eff9e3f13

General

Target

2024-02-23_c8c47bbe15ddb306d145294faa77a015_cryptolocker.exe
Size

66KB
MD5

c8c47bbe15ddb306d145294faa77a015
SHA1

cd99f1c72c3b89ea1e341be3921cff037df1d00b
SHA256

c9037d56250b2d6a329b4ac71ca28ad0abbc764f46c19ef9ed5e856eff9e3f13
SHA512

6b3bacfb8b3c529cdb0a85ccea9ad9f790179eab0517b06284d848777f6739774461e4c314061491a6b71fb291eafb3faaa69771292dea6f9d7c899fab507d61
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjY6UncY:1nK6a+qdOOtEvwDpjc

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2768-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000013a88-11.dat	CryptoLocker_rule2
behavioral1/memory/2768-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2768-13-0x0000000000640000-0x0000000000650000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2936-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2936-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2768-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000013a88-11.dat	CryptoLocker_set1
behavioral1/memory/2768-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2768-13-0x0000000000640000-0x0000000000650000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2936-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2936-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2768-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000b000000013a88-11.dat	UPX
behavioral1/memory/2768-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2768-13-0x0000000000640000-0x0000000000650000-memory.dmp	UPX
behavioral1/memory/2936-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2936-27-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2936	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2768	2024-02-23_c8c47bbe15ddb306d145294faa77a015_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2768-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000b000000013a88-11.dat	upx
behavioral1/memory/2768-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2768-13-0x0000000000640000-0x0000000000650000-memory.dmp	upx
behavioral1/memory/2936-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2936-27-0x0000000000500000-0x000000000050F311-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 2768 wrote to memory of 2936	2768	2024-02-23_c8c47bbe15ddb306d145294faa77a015_cryptolocker.exe	28
PID 2768 wrote to memory of 2936	2768	2024-02-23_c8c47bbe15ddb306d145294faa77a015_cryptolocker.exe	28
PID 2768 wrote to memory of 2936	2768	2024-02-23_c8c47bbe15ddb306d145294faa77a015_cryptolocker.exe	28
PID 2768 wrote to memory of 2936	2768	2024-02-23_c8c47bbe15ddb306d145294faa77a015_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-23_c8c47bbe15ddb306d145294faa77a015_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-23_c8c47bbe15ddb306d145294faa77a015_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2768
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2936

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
66KB

MD5
d83a7d54e4f403913ed00b488320428b

SHA1
7eb7df0ea8fddbd684b0b53ecf7348838d8b39ab

SHA256
6702871a46e614588eb02be1c5a7ae9867af9d41fb7ce3a2bd87a5518f194094

SHA512
88d0281d01f317e53d1b4b38fc22c91fb75d0379cde2dd84d7384a31dfedc5c242ee43b76426ad89e56e9a6ada23325944883d2bd6e678e01534054ae9ccfeb1

Download Submit
memory/2768-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2768-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2768-2-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2768-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2768-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2768-13-0x0000000000640000-0x0000000000650000-memory.dmp

Filesize
64KB

Download
memory/2936-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2936-19-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2936-26-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2936-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

Sharing