0a801fb53d3712f459003ba20036db0b274154bc52d08ae183906864c9f00d7d

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-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 4 IoCs

resource	yara_rule
behavioral2/memory/2656-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000001db0e-13.dat	CryptoLocker_rule2
behavioral2/memory/2656-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4212-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2656-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000001db0e-13.dat	CryptoLocker_set1
behavioral2/memory/2656-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4212-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2656-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000800000001db0e-13.dat	UPX
behavioral2/memory/2656-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4212-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1132431369-515282257-1998160155-1000\Control Panel\International\Geo\Nation	2024-04-23_a3cf6fb285a72a832233962b7441a59c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4212	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2656-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000800000001db0e-13.dat	upx
behavioral2/memory/2656-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4212-26-0x0000000000500000-0x000000000050F000-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 3 IoCs

description	pid	Process	procid_target
PID 2656 wrote to memory of 4212	2656	2024-04-23_a3cf6fb285a72a832233962b7441a59c_cryptolocker.exe	86
PID 2656 wrote to memory of 4212	2656	2024-04-23_a3cf6fb285a72a832233962b7441a59c_cryptolocker.exe	86
PID 2656 wrote to memory of 4212	2656	2024-04-23_a3cf6fb285a72a832233962b7441a59c_cryptolocker.exe	86

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⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2656
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4212

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
93KB

MD5
b0fdbff62a39bd2f439c0be9dba0799a

SHA1
fcd2e8ff8d711d13f9f55e792b557914f81be31a

SHA256
152323134bbcb096659fd50fab93a50a5db224ce5e5bf843802a404170b0a247

SHA512
0b3e856e16498d7eab712736baa06d504b9e40090de54a7d2a293e67bbef1380228dd7391cf09eccc642e73d9de5ac88b6e99be168b0f7e2112e437a950511af

Download Submit
memory/2656-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2656-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2656-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2656-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2656-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4212-19-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/4212-21-0x0000000002140000-0x0000000002146000-memory.dmp

Filesize
24KB

Download
memory/4212-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download