0a801fb53d3712f459003ba20036db0b274154bc52d08ae183906864c9f00d7d

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
23/04/2024, 04:49

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General

Target

2024-04-23_a3cf6fb285a72a832233962b7441a59c_cryptolocker.exe
Size

93KB
MD5

a3cf6fb285a72a832233962b7441a59c
SHA1

4e744e4d980e62082c9043e80f0a0ce14041b5ab
SHA256

0a801fb53d3712f459003ba20036db0b274154bc52d08ae183906864c9f00d7d
SHA512

3b6b49d9e1345ccc9e1ebe2f8724fa4ee64888b30560d429e78c86eeec5fe02a0904388b92240a33938509c191e6b34026dab4272b8c223d055c18e4e3f479d0
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp0+e:AnBdOOtEvwDpj6zZ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2972-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c000000012306-11.dat	CryptoLocker_rule2
behavioral1/memory/2972-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2508-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2508-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2972-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c000000012306-11.dat	CryptoLocker_set1
behavioral1/memory/2972-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2508-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2508-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2972-1-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000c000000012306-11.dat	UPX
behavioral1/memory/2972-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2508-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2508-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2508	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2972	2024-04-23_a3cf6fb285a72a832233962b7441a59c_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2972-1-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000c000000012306-11.dat	upx
behavioral1/memory/2972-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2508-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2508-27-0x0000000000500000-0x000000000050F000-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 2972 wrote to memory of 2508	2972	2024-04-23_a3cf6fb285a72a832233962b7441a59c_cryptolocker.exe	28
PID 2972 wrote to memory of 2508	2972	2024-04-23_a3cf6fb285a72a832233962b7441a59c_cryptolocker.exe	28
PID 2972 wrote to memory of 2508	2972	2024-04-23_a3cf6fb285a72a832233962b7441a59c_cryptolocker.exe	28
PID 2972 wrote to memory of 2508	2972	2024-04-23_a3cf6fb285a72a832233962b7441a59c_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-23_a3cf6fb285a72a832233962b7441a59c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-23_a3cf6fb285a72a832233962b7441a59c_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2972
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2508

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\asih.exe

Filesize
93KB

MD5
b0fdbff62a39bd2f439c0be9dba0799a

SHA1
fcd2e8ff8d711d13f9f55e792b557914f81be31a

SHA256
152323134bbcb096659fd50fab93a50a5db224ce5e5bf843802a404170b0a247

SHA512
0b3e856e16498d7eab712736baa06d504b9e40090de54a7d2a293e67bbef1380228dd7391cf09eccc642e73d9de5ac88b6e99be168b0f7e2112e437a950511af

Download Submit
memory/2508-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2508-19-0x0000000000440000-0x0000000000446000-memory.dmp

Filesize
24KB

Download
memory/2508-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2972-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2972-1-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2972-2-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/2972-3-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2972-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2972-16-0x0000000001E20000-0x0000000001E2F000-memory.dmp

Filesize
60KB

Download