c7266d9f4a78f8871d9a56f7be6e9de591fe27c233e299836a43fa6b40b13c82

General

Target

2024-04-15_c86e753ecd2712a2f05f6a6291278235_cryptolocker.exe
Size

36KB
MD5

c86e753ecd2712a2f05f6a6291278235
SHA1

64ca7fd4b10cee49ab9c334bc427a7b207a9bcd6
SHA256

c7266d9f4a78f8871d9a56f7be6e9de591fe27c233e299836a43fa6b40b13c82
SHA512

7b15efb19a4edc8c04e22b1621ec576b877369c1a5fc2a943fbe2c4724cdb08ac872415d48b56a7d65ef72e28119fa4a3528104257d2b400a9669bf6cbda942b
SSDEEP

768:qUmnjFom/kLyMro2GtOOtEvwDpjeMLam5axKp:qUmnpomddpMOtEvwDpjjaYaq

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/1184-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c000000012241-11.dat	CryptoLocker_rule2
behavioral1/memory/1184-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2232-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2232-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1184-28-0x0000000002380000-0x000000000238F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/1184-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c000000012241-11.dat	CryptoLocker_set1
behavioral1/memory/1184-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2232-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2232-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1184-28-0x0000000002380000-0x000000000238F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1184-1-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000c000000012241-11.dat	UPX
behavioral1/memory/1184-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2232-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2232-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2232	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1184	2024-04-15_c86e753ecd2712a2f05f6a6291278235_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1184-1-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000c000000012241-11.dat	upx
behavioral1/memory/1184-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2232-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2232-27-0x0000000000500000-0x000000000050F000-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 1184 wrote to memory of 2232	1184	2024-04-15_c86e753ecd2712a2f05f6a6291278235_cryptolocker.exe	28
PID 1184 wrote to memory of 2232	1184	2024-04-15_c86e753ecd2712a2f05f6a6291278235_cryptolocker.exe	28
PID 1184 wrote to memory of 2232	1184	2024-04-15_c86e753ecd2712a2f05f6a6291278235_cryptolocker.exe	28
PID 1184 wrote to memory of 2232	1184	2024-04-15_c86e753ecd2712a2f05f6a6291278235_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-15_c86e753ecd2712a2f05f6a6291278235_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-15_c86e753ecd2712a2f05f6a6291278235_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1184
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2232

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
36KB

MD5
dc2144aaa5074e8bf3b4d85458fba9f7

SHA1
fb482443786abaa98df00397ff62d1e99d061caf

SHA256
d7fc082939362020c19cd53fd691ba3ba5fd3cfca3e887b71db41e24d073b84c

SHA512
d8d8de36638cef50d6ac2d80a008bb4743bdfb0719db3c0aa4c36e3717cd9d210cad198fadd66fb7136091da45c64978b3732230c4391b0d47d87b3b447c7b35

Download Submit
memory/1184-1-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1184-0-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1184-2-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/1184-3-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1184-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1184-16-0x0000000002380000-0x000000000238F000-memory.dmp

Filesize
60KB

Download
memory/1184-28-0x0000000002380000-0x000000000238F000-memory.dmp

Filesize
60KB

Download
memory/2232-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2232-19-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2232-20-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/2232-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download

Analysis

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