dd00866608d3473ef19cb3ca94908773cfced474ca7c4016e4ed688653ca845d

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
25/01/2024, 10:28

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-01-25_b77b86f42ded510b3bb1d6d366408e33_cryptolocker.exe
Size

94KB
MD5

b77b86f42ded510b3bb1d6d366408e33
SHA1

1f5ab3788fee763b216a5ec70df96d139992011a
SHA256

dd00866608d3473ef19cb3ca94908773cfced474ca7c4016e4ed688653ca845d
SHA512

46547bd6e3461cdc0ba8b364d6dcc4cf067b70b0d0e01198110884f5e8051c5981008da0b9473f16a72dde9cfc276dc541a93e0376f3981e12c93715d91461b3
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp01hT:AnBdOOtEvwDpj6z3

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4576-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000a00000002312d-13.dat	CryptoLocker_rule2
behavioral2/memory/4576-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2308-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4576-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000a00000002312d-13.dat	CryptoLocker_set1
behavioral2/memory/4576-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2308-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4576-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000a00000002312d-13.dat	UPX
behavioral2/memory/4576-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/2308-26-0x0000000000500000-0x000000000050F000-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-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	2024-01-25_b77b86f42ded510b3bb1d6d366408e33_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2308	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4576-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000a00000002312d-13.dat	upx
behavioral2/memory/4576-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/2308-26-0x0000000000500000-0x000000000050F000-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 4576 wrote to memory of 2308	4576	2024-01-25_b77b86f42ded510b3bb1d6d366408e33_cryptolocker.exe	88
PID 4576 wrote to memory of 2308	4576	2024-01-25_b77b86f42ded510b3bb1d6d366408e33_cryptolocker.exe	88
PID 4576 wrote to memory of 2308	4576	2024-01-25_b77b86f42ded510b3bb1d6d366408e33_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-01-25_b77b86f42ded510b3bb1d6d366408e33_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-25_b77b86f42ded510b3bb1d6d366408e33_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4576
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2308

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

Loading Replay Monitor...

Downloads

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

Filesize
95KB

MD5
8f078c484cb52f485be68d8f4a6a7933

SHA1
8775b1aef6e0cfda5f1eb3173347ce73c3a27826

SHA256
6e46dd835f9ba3d9ac97a59534d124443c77ffcc499d2c6f39c373af02d5a095

SHA512
3954809303ddefed7d334f1fc517b65b883be3643bf39301d858bab51af2efc3364d9dc35eb35a9ed4599b03677133c6a4fd7eb60c94b56ef68641d94c1cd23e

Download Submit
memory/2308-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/2308-21-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/2308-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4576-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4576-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4576-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4576-3-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/4576-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download