d485204ae8c7af8504a9e81c0c2b49530e401b40dc18bcc5e5e7bcddeb0d1316

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
19/02/2024, 17:33

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General

Target

2024-02-19_71839a23c269db94fe3296be934bb300_cryptolocker.exe
Size

48KB
MD5

71839a23c269db94fe3296be934bb300
SHA1

defac298c8ab8bd4d073d4182f0a065e1b489cc4
SHA256

d485204ae8c7af8504a9e81c0c2b49530e401b40dc18bcc5e5e7bcddeb0d1316
SHA512

f14375466405bdf6f90572b4c2fcc7c6fdf5d945a5cc8fa37cf2f1c6784e1c4fa7c15af811b47e0a403e3e4436621489e50566d85890f2214d62df554a75cab1
SSDEEP

768:79inqyNR/QtOOtEvwDpjBK/rJ+Nw8qnUC54:79mqyNhQMOtEvwDpjBxe8xC54

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/3484-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c0000000231e7-13.dat	CryptoLocker_rule2
behavioral2/memory/3484-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/3484-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c0000000231e7-13.dat	CryptoLocker_set1
behavioral2/memory/3484-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

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-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation	2024-02-19_71839a23c269db94fe3296be934bb300_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5000	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 3484 wrote to memory of 5000	3484	2024-02-19_71839a23c269db94fe3296be934bb300_cryptolocker.exe	86
PID 3484 wrote to memory of 5000	3484	2024-02-19_71839a23c269db94fe3296be934bb300_cryptolocker.exe	86
PID 3484 wrote to memory of 5000	3484	2024-02-19_71839a23c269db94fe3296be934bb300_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-02-19_71839a23c269db94fe3296be934bb300_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-19_71839a23c269db94fe3296be934bb300_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3484
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5000

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
49KB

MD5
51002ae087eb376ba7741e1bd60187a7

SHA1
e5315655fbe4c3bceac0cd3973324ac9bc0a7e34

SHA256
c93d2b6f3ef57359128ad5b1119d3775400684dc5f8db84288f08640cd0d7fda

SHA512
2ea588d4561d633a1a03ea91691af95a260c08730c2ecbfc3ad85e2964290728b80918cc3f53ae34e6e76f99e5bc06390f440034c29949fe8441e916a5d17a32

Download Submit
memory/3484-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3484-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/3484-2-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/3484-3-0x0000000000540000-0x0000000000546000-memory.dmp

Filesize
24KB

Download
memory/3484-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/5000-19-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/5000-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download