409b75bac91f495d5519e5c4297abb1d64983f5d2435c31e785d44a5f849c2ef

General

Target

2024-04-16_3a6775ae226e04b14fe463ce8d29ab3c_cryptolocker.exe
Size

79KB
MD5

3a6775ae226e04b14fe463ce8d29ab3c
SHA1

6299999f9b41546363d2bc6a48efb09fb01cf13b
SHA256

409b75bac91f495d5519e5c4297abb1d64983f5d2435c31e785d44a5f849c2ef
SHA512

b21bb6cb6a5624132b892ae4bad10228eb7412c2557697f15c8e5070b9c693921f3b94415125ff1c5cc9f195ac2e037468b4103ed11dfef72c2c617de49dd54d
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1ky7Qt:zCsanOtEvwDpjZ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/1948-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1948-12-0x0000000002BC0000-0x0000000002BD0000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b00000001224f-16.dat	CryptoLocker_rule2
behavioral1/memory/2148-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1948-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2148-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/1948-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1948-12-0x0000000002BC0000-0x0000000002BD0000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b00000001224f-16.dat	CryptoLocker_set1
behavioral1/memory/2148-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1948-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2148-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/1948-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1948-12-0x0000000002BC0000-0x0000000002BD0000-memory.dmp	UPX
behavioral1/files/0x000b00000001224f-16.dat	UPX
behavioral1/memory/2148-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1948-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2148-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2148	misid.exe

Loads dropped DLL 1 IoCs

pid	Process
1948	2024-04-16_3a6775ae226e04b14fe463ce8d29ab3c_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1948-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1948-12-0x0000000002BC0000-0x0000000002BD0000-memory.dmp	upx
behavioral1/files/0x000b00000001224f-16.dat	upx
behavioral1/memory/2148-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1948-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2148-27-0x0000000000500000-0x0000000000510000-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 1948 wrote to memory of 2148	1948	2024-04-16_3a6775ae226e04b14fe463ce8d29ab3c_cryptolocker.exe	28
PID 1948 wrote to memory of 2148	1948	2024-04-16_3a6775ae226e04b14fe463ce8d29ab3c_cryptolocker.exe	28
PID 1948 wrote to memory of 2148	1948	2024-04-16_3a6775ae226e04b14fe463ce8d29ab3c_cryptolocker.exe	28
PID 1948 wrote to memory of 2148	1948	2024-04-16_3a6775ae226e04b14fe463ce8d29ab3c_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-16_3a6775ae226e04b14fe463ce8d29ab3c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-16_3a6775ae226e04b14fe463ce8d29ab3c_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1948
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:2148

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\misid.exe

Filesize
79KB

MD5
7c539576c3c5842d70c17d0ab2905388

SHA1
78a56cd16acc9c8669ff394c1cf864458d977b7e

SHA256
31eb4e92494071e9e40813ed6aed20900443e7a1eda421da764fa21b02f62708

SHA512
0fa07b0eab2041d6963e4c7fc01a703d180e985a831b4e20de460af256f1f81078168c73773629a5b1d6d29a0ddcdc8c0bf931c7a8efcfd18fc91f05c0600cac

Download Submit
memory/1948-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1948-1-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/1948-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1948-8-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/1948-12-0x0000000002BC0000-0x0000000002BD0000-memory.dmp

Filesize
64KB

Download
memory/1948-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2148-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2148-19-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/2148-22-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2148-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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