300d1ea4c61cfa6adf6ca7699d4de2cef6ec061cc2d32ac0474f93090ee4782b

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
24/02/2024, 19:26

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General

Target

2024-02-24_1c877ebd394213b946976fefa8044fbc_cryptolocker.exe
Size

116KB
MD5

1c877ebd394213b946976fefa8044fbc
SHA1

e9558d7c911a522fa93875635884d13ad119f799
SHA256

300d1ea4c61cfa6adf6ca7699d4de2cef6ec061cc2d32ac0474f93090ee4782b
SHA512

8f56ae5993c0e4803b8432f7faedf6903e82d908e27de390f0a80e89d5ec86f86c5ed617819a9eb7d24a2df03ee628f4ccc53b837c986f59e9b6fe8a605be621
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp01A:z6a+CdOOtEvwDpjcze

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3920-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001fc40-13.dat	CryptoLocker_rule2
behavioral2/memory/3420-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3920-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3420-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3920-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001fc40-13.dat	CryptoLocker_set1
behavioral2/memory/3420-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3920-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3420-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3920-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000300000001fc40-13.dat	UPX
behavioral2/memory/3420-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3920-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3420-27-0x0000000000500000-0x0000000000510000-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-1-5-21-3316742141-2240921845-2885234760-1000\Control Panel\International\Geo\Nation	2024-02-24_1c877ebd394213b946976fefa8044fbc_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3420	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3920-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000300000001fc40-13.dat	upx
behavioral2/memory/3420-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3920-26-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3420-27-0x0000000000500000-0x0000000000510000-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 3920 wrote to memory of 3420	3920	2024-02-24_1c877ebd394213b946976fefa8044fbc_cryptolocker.exe	87
PID 3920 wrote to memory of 3420	3920	2024-02-24_1c877ebd394213b946976fefa8044fbc_cryptolocker.exe	87
PID 3920 wrote to memory of 3420	3920	2024-02-24_1c877ebd394213b946976fefa8044fbc_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-02-24_1c877ebd394213b946976fefa8044fbc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-24_1c877ebd394213b946976fefa8044fbc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3920
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3420

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
116KB

MD5
8d7c876403832fd2504651f4c5d04b7f

SHA1
763835c9952bc8d9dd518e66f2c94b31c9c5da01

SHA256
e6f68f187be9448bb9edb825c945fea09bda237f91e9f4a7dc03afc5368d0270

SHA512
9af83e4989e7989974a8c72d7856ea6385f7c17bf2da5487d9ce44980999bc86954c2f5018cc366cf0b38f891cc967513a2851350b8c6553ca15d4ee353bee50

Download Submit
memory/3420-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3420-19-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3420-22-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3420-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3920-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3920-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3920-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3920-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/3920-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download