4dc404f515009bb71a872b5af70b3216c61a004a8f381eeed9f2f1e858d39a82

General

Target

2024-03-26_dfa1e903dee9e210869a60ca70b2eaeb_cryptolocker.exe
Size

61KB
MD5

dfa1e903dee9e210869a60ca70b2eaeb
SHA1

5e0436c4c91900c7425da5da0e6716387ca7e228
SHA256

4dc404f515009bb71a872b5af70b3216c61a004a8f381eeed9f2f1e858d39a82
SHA512

4d3780d7a2766c122c63e1a8ca5bbe59f5ad32046e721d65a25b1d980ecb5705b009c0817d0d676d58bc9a46201737b29ca7d5d3b5af00fe299a9c3f85a8c6ee
SSDEEP

768:T6LsoEEeegiZPvEhHSG+gkum/kLyMro2GtOOtEvwDpjhXMLamkc8J59l:T6QFElP6n+gxmddpMOtEvwDpjwa39l

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/944-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d0000000122a8-11.dat	CryptoLocker_rule2
behavioral1/memory/944-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2228-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/944-13-0x0000000000910000-0x0000000000920000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2228-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/944-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000d0000000122a8-11.dat	CryptoLocker_set1
behavioral1/memory/944-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2228-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/944-13-0x0000000000910000-0x0000000000920000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2228-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/944-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000d0000000122a8-11.dat	UPX
behavioral1/memory/944-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2228-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/944-13-0x0000000000910000-0x0000000000920000-memory.dmp	UPX
behavioral1/memory/2228-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2228	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
944	2024-03-26_dfa1e903dee9e210869a60ca70b2eaeb_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/944-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000d0000000122a8-11.dat	upx
behavioral1/memory/944-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2228-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/944-13-0x0000000000910000-0x0000000000920000-memory.dmp	upx
behavioral1/memory/2228-26-0x0000000000500000-0x0000000000510000-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 944 wrote to memory of 2228	944	2024-03-26_dfa1e903dee9e210869a60ca70b2eaeb_cryptolocker.exe	28
PID 944 wrote to memory of 2228	944	2024-03-26_dfa1e903dee9e210869a60ca70b2eaeb_cryptolocker.exe	28
PID 944 wrote to memory of 2228	944	2024-03-26_dfa1e903dee9e210869a60ca70b2eaeb_cryptolocker.exe	28
PID 944 wrote to memory of 2228	944	2024-03-26_dfa1e903dee9e210869a60ca70b2eaeb_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-26_dfa1e903dee9e210869a60ca70b2eaeb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-26_dfa1e903dee9e210869a60ca70b2eaeb_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:944
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2228

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
61KB

MD5
b628f41eebba3b6eb3b753e18e7a75a3

SHA1
e717e9f6388f6a90b6f20216081fe0b6721c8ec8

SHA256
61b13cf8cb109180d3bc1e73d2c155e3e8ddbb2dc363464bbd0b4f6f0c8eaff6

SHA512
aeef63e8a1a622438de55e9021374e38055f198bedb4aa6ce35af6c07e9d1e2842c4fe91b0f0d38fbadef68cf664b5279bae79d878d32e33c0df18dd3815429c

Download Submit
memory/944-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/944-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/944-2-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/944-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/944-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/944-13-0x0000000000910000-0x0000000000920000-memory.dmp

Filesize
64KB

Download
memory/2228-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2228-19-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2228-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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