b6b678408029e2ebb44ad13ec79919f218c0d2a6825f6362e79fb51812b7e7f5

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
28/04/2024, 05:49

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General

Target

2024-04-28_f0637f48b3cb1978e5ce6648583605fc_cryptolocker.exe
Size

68KB
MD5

f0637f48b3cb1978e5ce6648583605fc
SHA1

c6744ace6707846525a1260865605124231373f5
SHA256

b6b678408029e2ebb44ad13ec79919f218c0d2a6825f6362e79fb51812b7e7f5
SHA512

1aadf41ae9a4b58eb8b7bef100ce11cda77da51b80ed42499f6ccc76da62e4af2b783750822a1bb8647342bbd3fb7cae3f8c5b2359413b487d549fff3b1b4ad6
SSDEEP

768:quVbxjgQNQXtckstOOtEvwDpjAaDOK6PsED3VK2+ZtyOjgO4r9vFAg2rq6W1A1PJ:quJu9cvMOtEvwDpjWYTjipvF2bx1PQAJ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3536-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002343a-13.dat	CryptoLocker_rule2
behavioral2/memory/3536-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3564-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3536-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002343a-13.dat	CryptoLocker_set1
behavioral2/memory/3536-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3564-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3536-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000800000002343a-13.dat	UPX
behavioral2/memory/3536-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3564-26-0x0000000000500000-0x000000000050F000-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-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	2024-04-28_f0637f48b3cb1978e5ce6648583605fc_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3564	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3536-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000800000002343a-13.dat	upx
behavioral2/memory/3536-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3564-26-0x0000000000500000-0x000000000050F000-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 3536 wrote to memory of 3564	3536	2024-04-28_f0637f48b3cb1978e5ce6648583605fc_cryptolocker.exe	84
PID 3536 wrote to memory of 3564	3536	2024-04-28_f0637f48b3cb1978e5ce6648583605fc_cryptolocker.exe	84
PID 3536 wrote to memory of 3564	3536	2024-04-28_f0637f48b3cb1978e5ce6648583605fc_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-04-28_f0637f48b3cb1978e5ce6648583605fc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_f0637f48b3cb1978e5ce6648583605fc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3536
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3564

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
68KB

MD5
933c2f4b9fd9d418cc7b8aca44872bfc

SHA1
654b4616c51dd0c34d17dfd9915795b6bc614006

SHA256
93991e80122edc29920d1eb558cd59a681603a80f15632873e08181fc5f1dd97

SHA512
eb7c88727b467a002a19f4108698a5488cb467dd91fc2d99793273025f0374799ed70bbb3dd52d46ed501e50575ea0bfde3826e9aa36c61b0f3d23d530dbe597

Download Submit
memory/3536-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3536-1-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/3536-2-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/3536-9-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/3536-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3564-19-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/3564-25-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3564-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download