2f5645ad70b305f7de062f127a675a248a36e7d91c4b124230a15401de98be6a

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/02/2024, 15:28

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General

Target

2024-02-28_11fd7696854585e1e9437ef13fe1881c_cryptolocker.exe
Size

100KB
MD5

11fd7696854585e1e9437ef13fe1881c
SHA1

b0602872e7bde3b05c7d5421ef0e253d81a732c2
SHA256

2f5645ad70b305f7de062f127a675a248a36e7d91c4b124230a15401de98be6a
SHA512

bcebd9f4370a7518cb1d4d9e4e26c157f7ffb360c512b86809a8bdb3d746d1bee3d3976e1133a927e5a463468de5a8cd8c859ac45f1fc1dc4d6cd7d43005a978
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpwqWsviy6Z:AnBdOOtEvwDpj6zF

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4004-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000400000001e980-13.dat	CryptoLocker_rule2
behavioral2/memory/1196-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4004-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1196-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4004-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000400000001e980-13.dat	CryptoLocker_set1
behavioral2/memory/1196-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4004-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1196-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4004-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000400000001e980-13.dat	UPX
behavioral2/memory/1196-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4004-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1196-27-0x0000000000500000-0x000000000050F000-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-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	2024-02-28_11fd7696854585e1e9437ef13fe1881c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1196	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4004-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000400000001e980-13.dat	upx
behavioral2/memory/1196-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4004-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1196-27-0x0000000000500000-0x000000000050F000-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 3 IoCs

description	pid	Process	procid_target
PID 4004 wrote to memory of 1196	4004	2024-02-28_11fd7696854585e1e9437ef13fe1881c_cryptolocker.exe	92
PID 4004 wrote to memory of 1196	4004	2024-02-28_11fd7696854585e1e9437ef13fe1881c_cryptolocker.exe	92
PID 4004 wrote to memory of 1196	4004	2024-02-28_11fd7696854585e1e9437ef13fe1881c_cryptolocker.exe	92

C:\Users\Admin\AppData\Local\Temp\2024-02-28_11fd7696854585e1e9437ef13fe1881c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-28_11fd7696854585e1e9437ef13fe1881c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4004
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1196

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

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Downloads

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

Filesize
101KB

MD5
73952504c955d3e2c93c234a7bd643bc

SHA1
fbab8093beadc08b6b324ff84921c7249c9b930e

SHA256
0726c5475d1ef6c6f067c39133b5e29da54f225a8540a705bfb7a62b32b7595d

SHA512
b831ae8d75ea1a6ee3067ac44bfca29fbe3f9aae0e44af96f9e9fe6de30940e73b2e5baa2daf7ab65096c374b7396325f033d763d2a0ff841975d59d1b9289fa

Download Submit
memory/1196-20-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/1196-26-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/1196-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1196-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4004-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4004-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4004-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4004-3-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/4004-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download