5072b322649fd2ba89220ab24448035fa1db78a19705cc9e4b40c48c1a8ea65f

General

Target

2024-03-15_9cc0d5d086f789dfd2fc4fbd5232d0d3_cryptolocker.exe
Size

87KB
MD5

9cc0d5d086f789dfd2fc4fbd5232d0d3
SHA1

f9ae0fc38db2cb5579da7079b4d0dfcf4c3bf21f
SHA256

5072b322649fd2ba89220ab24448035fa1db78a19705cc9e4b40c48c1a8ea65f
SHA512

56a536ad529ccad5a66b2c4291993fd715ee4c8a030289ae46644e35e048757ac9b28027ce5fcd02a73f84c207eba623cdbb11e7b24a3e67312e913ef3c9de79
SSDEEP

768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtIJ/q:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgn

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2952-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c000000012339-11.dat	CryptoLocker_rule2
behavioral1/memory/2952-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3056-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3056-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2952-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c000000012339-11.dat	CryptoLocker_set1
behavioral1/memory/2952-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3056-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3056-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2952-1-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000c000000012339-11.dat	UPX
behavioral1/memory/2952-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/3056-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/3056-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3056	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2952	2024-03-15_9cc0d5d086f789dfd2fc4fbd5232d0d3_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2952-1-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000c000000012339-11.dat	upx
behavioral1/memory/2952-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/3056-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/3056-27-0x0000000000500000-0x000000000050F000-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 2952 wrote to memory of 3056	2952	2024-03-15_9cc0d5d086f789dfd2fc4fbd5232d0d3_cryptolocker.exe	28
PID 2952 wrote to memory of 3056	2952	2024-03-15_9cc0d5d086f789dfd2fc4fbd5232d0d3_cryptolocker.exe	28
PID 2952 wrote to memory of 3056	2952	2024-03-15_9cc0d5d086f789dfd2fc4fbd5232d0d3_cryptolocker.exe	28
PID 2952 wrote to memory of 3056	2952	2024-03-15_9cc0d5d086f789dfd2fc4fbd5232d0d3_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-15_9cc0d5d086f789dfd2fc4fbd5232d0d3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-15_9cc0d5d086f789dfd2fc4fbd5232d0d3_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2952
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3056

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
87KB

MD5
dcf561b9f7640aa16e18c70a00f1d822

SHA1
a379380d19685082785024a3cb801f2fdc38b678

SHA256
fa5beb99492280ad4e15195062286fa36ab8cf0b8e8e6c86e099d86d03ebce86

SHA512
1fdfd03310e2146f4cda2a196d378e65ca7160beb3bb9c41df0f074ec3b48fe681694a63ba9b227ab45fbc3588443ed41723a3d4fd65ee42390ea30fc0a43bc9

Download Submit
memory/2952-2-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2952-1-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2952-0-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/2952-3-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/2952-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2952-16-0x00000000005B0000-0x00000000005BF000-memory.dmp

Filesize
60KB

Download
memory/2952-29-0x00000000005B0000-0x00000000005BF000-memory.dmp

Filesize
60KB

Download
memory/3056-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3056-19-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/3056-20-0x00000000004B0000-0x00000000004B6000-memory.dmp

Filesize
24KB

Download
memory/3056-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download

Analysis

Sharing