d4fcc9b1ec47a0323c79379c57ac82092b9edf18e8cdbea6f6fb3e693ce3032b

General

Target

2024-01-18_2decd72c5c1751d21ab7935ca3f7e694_cryptolocker.exe
Size

61KB
MD5

2decd72c5c1751d21ab7935ca3f7e694
SHA1

4560da44cd596e80871f249ffbdbb616a2cb5687
SHA256

d4fcc9b1ec47a0323c79379c57ac82092b9edf18e8cdbea6f6fb3e693ce3032b
SHA512

4d746b5c8a6b87a05b8f942539a24a26260e782e0785320e2e51327304c0b805a59df757eca18d61701234c4da3b419515dac0c5e2fb20d6df2cd2800fc802d1
SSDEEP

768:P8mnjO6LsoEEeegiZPvEhHSG+gbum/kLyMro2GtOOtEvwDpjKvWxHCbSVaFn0jKv:P8mnK6QFElP6n+gymddpMOtEvwDpjYp

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2180-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x0009000000012252-11.dat	CryptoLocker_rule2
behavioral1/memory/2180-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2180-13-0x00000000006F0000-0x0000000000700000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2408-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2408-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2180-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x0009000000012252-11.dat	CryptoLocker_set1
behavioral1/memory/2180-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2180-13-0x00000000006F0000-0x0000000000700000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2408-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2408-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2180-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x0009000000012252-11.dat	UPX
behavioral1/memory/2180-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2180-13-0x00000000006F0000-0x0000000000700000-memory.dmp	UPX
behavioral1/memory/2408-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2408-27-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2408	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2180	2024-01-18_2decd72c5c1751d21ab7935ca3f7e694_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2180-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x0009000000012252-11.dat	upx
behavioral1/memory/2180-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2180-13-0x00000000006F0000-0x0000000000700000-memory.dmp	upx
behavioral1/memory/2408-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2408-27-0x0000000000500000-0x000000000050F311-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 2180 wrote to memory of 2408	2180	2024-01-18_2decd72c5c1751d21ab7935ca3f7e694_cryptolocker.exe	28
PID 2180 wrote to memory of 2408	2180	2024-01-18_2decd72c5c1751d21ab7935ca3f7e694_cryptolocker.exe	28
PID 2180 wrote to memory of 2408	2180	2024-01-18_2decd72c5c1751d21ab7935ca3f7e694_cryptolocker.exe	28
PID 2180 wrote to memory of 2408	2180	2024-01-18_2decd72c5c1751d21ab7935ca3f7e694_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-01-18_2decd72c5c1751d21ab7935ca3f7e694_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-18_2decd72c5c1751d21ab7935ca3f7e694_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2180
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2408

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
61KB

MD5
86e3208008bad048dfb4d4ecc9310976

SHA1
0f361bc3d855ef61d4844783d376df9193583da2

SHA256
5b1da7ece2eef5ec740b128bb0217f950488b07b4030bfddb6858cf0face26d1

SHA512
0f4608aa55bf6e31598affc6f60ffa907cdd46c306af758b9474a7393ab75aaa1bce22be3fe73edb8915e66fa75800509516e7ce3c10686a06af8426e2b7f736

Download Submit
memory/2180-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2180-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2180-2-0x0000000000330000-0x0000000000336000-memory.dmp

Filesize
24KB

Download
memory/2180-4-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2180-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2180-13-0x00000000006F0000-0x0000000000700000-memory.dmp

Filesize
64KB

Download
memory/2408-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2408-19-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2408-23-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2408-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

Sharing