b0723e79f6f96fd36810092e660d876afc308123713e2453cc7f921d988be0de

Analysis

max time kernel
153s
max time network
159s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
08/03/2024, 21:36

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General

Target

2024-03-08_bf0408240f8b88bb06b5823040118fb5_cryptolocker.exe
Size

35KB
MD5

bf0408240f8b88bb06b5823040118fb5
SHA1

af9ceb715e18c0add90daacec8a26db6871fc624
SHA256

b0723e79f6f96fd36810092e660d876afc308123713e2453cc7f921d988be0de
SHA512

1ed4f8614dcb9732a70f456470eea0ede292281fa64e6e0d8f20bab0e6975ed0986af99a3935a7c7480116e2d5bcb29a599861b200bfe387fe59103e0f20d2af
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoW8t:qmbhXDmjr5MOtEvwDpj5cDvt

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2840-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023228-13.dat	CryptoLocker_rule2
behavioral2/memory/2840-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4788-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/2840-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4788-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2840-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023228-13.dat	UPX
behavioral2/memory/2840-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4788-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2727153400-192325109-1870347593-1000\Control Panel\International\Geo\Nation	2024-03-08_bf0408240f8b88bb06b5823040118fb5_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4788	asih.exe

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 2840 wrote to memory of 4788	2840	2024-03-08_bf0408240f8b88bb06b5823040118fb5_cryptolocker.exe	91
PID 2840 wrote to memory of 4788	2840	2024-03-08_bf0408240f8b88bb06b5823040118fb5_cryptolocker.exe	91
PID 2840 wrote to memory of 4788	2840	2024-03-08_bf0408240f8b88bb06b5823040118fb5_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-03-08_bf0408240f8b88bb06b5823040118fb5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-08_bf0408240f8b88bb06b5823040118fb5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2840
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4788

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
35KB

MD5
4a8b097bde5b6a4098b571b6d7f6f21c

SHA1
af63c2b3093e1a3cec6cd51b7b36fced24cc0085

SHA256
7a097ffcb45062f5f295abef92b4365e990b588a27e38e2db4780514ec4271eb

SHA512
85bf30e7d69ad89edd300e5b94cae12f08a1a8162306702beb1295d33d2df88dddd097437364066a27d123e184e52c17816731a6df1b0ee94449a2bb62dd8976

Download Submit
memory/2840-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2840-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2840-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2840-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/2840-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4788-20-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4788-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4788-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download