59ac5194bcb3351b74bb63955d5c8fccdc041b9af1ffeb95f03845c9a8c7aaeb

General

Target

2024-05-22_00fd1b883e08a7bef245069d2afdd7db_cryptolocker.exe
Size

91KB
MD5

00fd1b883e08a7bef245069d2afdd7db
SHA1

960de92f97c77845a2b0cad32734de757f86e55f
SHA256

59ac5194bcb3351b74bb63955d5c8fccdc041b9af1ffeb95f03845c9a8c7aaeb
SHA512

2d14c217284c4effde4ad03b13d198faf191abe19f62d2fc5ddeb7705675a1082238991bdc36ff1719e521fa3fe03d6b5d8360e3c1953220dc8b1f2a17a89738
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/Db:n6a+1SEOtEvwDpjYYvQd2Pg

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/1752-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x0009000000016a29-11.dat	CryptoLocker_rule2
behavioral1/memory/1752-13-0x0000000002BC0000-0x0000000002BD0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1752-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3036-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3036-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/1752-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x0009000000016a29-11.dat	CryptoLocker_set1
behavioral1/memory/1752-13-0x0000000002BC0000-0x0000000002BD0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1752-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3036-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3036-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/1752-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x0009000000016a29-11.dat	UPX
behavioral1/memory/1752-13-0x0000000002BC0000-0x0000000002BD0000-memory.dmp	UPX
behavioral1/memory/1752-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/3036-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/3036-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3036	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1752	2024-05-22_00fd1b883e08a7bef245069d2afdd7db_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1752-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x0009000000016a29-11.dat	upx
behavioral1/memory/1752-13-0x0000000002BC0000-0x0000000002BD0000-memory.dmp	upx
behavioral1/memory/1752-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/3036-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/3036-26-0x0000000000500000-0x0000000000510000-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 1752 wrote to memory of 3036	1752	2024-05-22_00fd1b883e08a7bef245069d2afdd7db_cryptolocker.exe	28
PID 1752 wrote to memory of 3036	1752	2024-05-22_00fd1b883e08a7bef245069d2afdd7db_cryptolocker.exe	28
PID 1752 wrote to memory of 3036	1752	2024-05-22_00fd1b883e08a7bef245069d2afdd7db_cryptolocker.exe	28
PID 1752 wrote to memory of 3036	1752	2024-05-22_00fd1b883e08a7bef245069d2afdd7db_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-22_00fd1b883e08a7bef245069d2afdd7db_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_00fd1b883e08a7bef245069d2afdd7db_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1752
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3036

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

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

Filesize
91KB

MD5
a6c5c84584ba172beb78f1a795c696a1

SHA1
d26936ffd0688dfa78cf7e56e9b39c43cb042a63

SHA256
15425998d4da2ac0f11bce69cea758b54d45ebd48f67ea7df9c8f25ae1576652

SHA512
b80664635c045bd26d70d3ef2056805834fa31fcf29e2880ebe96ebbb4d2fed038e7de3d0865cbce3fd49e34c9ac5880da6e705a40f7726b35e04071dd85a2b8

Download Submit
memory/1752-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1752-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1752-2-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1752-3-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/1752-13-0x0000000002BC0000-0x0000000002BD0000-memory.dmp

Filesize
64KB

Download
memory/1752-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3036-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3036-19-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/3036-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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