37cdedafe3ae4cc3e58a5b35f017c3fbf30a0b00d7a17329e5081757bac5b604

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
25-05-2024 07:25

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General

Target

2024-05-25_44668428733990d30f7585383d067358_cryptolocker.exe
Size

24KB
MD5

44668428733990d30f7585383d067358
SHA1

de5cd6c74344f02309dee2f5064b5217255c8523
SHA256

37cdedafe3ae4cc3e58a5b35f017c3fbf30a0b00d7a17329e5081757bac5b604
SHA512

66777ab11975edf3146831c4f519548337f0acb91adfef1595d09cbd3392c6beb445864b79cd34762554a9639e18b7c242cb4c4a57154906f80288dffa803eae
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6HMJw:bVCPwFRo6CpwXFXSqQXfjAsJw

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1224-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x0009000000012280-11.dat	CryptoLocker_rule2
behavioral1/memory/1224-15-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2928-17-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2928-26-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1224-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/files/0x0009000000012280-11.dat	UPX
behavioral1/memory/1224-15-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/memory/2928-17-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/memory/2928-26-0x0000000008000000-0x000000000800E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2928	hasfj.exe

Loads dropped DLL 1 IoCs

pid	Process
1224	2024-05-25_44668428733990d30f7585383d067358_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1224-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/files/0x0009000000012280-11.dat	upx
behavioral1/memory/1224-15-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/memory/2928-17-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/memory/2928-26-0x0000000008000000-0x000000000800E000-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 1224 wrote to memory of 2928	1224	2024-05-25_44668428733990d30f7585383d067358_cryptolocker.exe	28
PID 1224 wrote to memory of 2928	1224	2024-05-25_44668428733990d30f7585383d067358_cryptolocker.exe	28
PID 1224 wrote to memory of 2928	1224	2024-05-25_44668428733990d30f7585383d067358_cryptolocker.exe	28
PID 1224 wrote to memory of 2928	1224	2024-05-25_44668428733990d30f7585383d067358_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-25_44668428733990d30f7585383d067358_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-25_44668428733990d30f7585383d067358_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1224
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:2928

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
24KB

MD5
163b71de540b7d5dbf22ebe1924836ed

SHA1
86bfe1e6339290bc892a8965509fc5414bfd12c4

SHA256
6acb0c6117604d772e0117c487dd0b77b647bdc3b754ad9e50e56a09364e4a24

SHA512
5525af530543a364c3dc68e1e24df454c230559e229709b2af58d8bcf6cf317209e9f0fd2c7d14e2ad6d5d13db708e5a2d227a6106e299ff6c76d96ee02866d1

Download Submit
memory/1224-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/1224-1-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/1224-9-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/1224-2-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/1224-15-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2928-17-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2928-19-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2928-26-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download