21bdb69a349cb8a8907a8edab5e0d6562e5d301ac60e093d838ee6b53acfb430

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
29/01/2024, 02:36

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General

Target

2024-01-29_f864af345cf606c4ac87316f88b2138f_cryptolocker.exe
Size

45KB
MD5

f864af345cf606c4ac87316f88b2138f
SHA1

21ad8580fcc37abc79e8124d904aa9a52687a047
SHA256

21bdb69a349cb8a8907a8edab5e0d6562e5d301ac60e093d838ee6b53acfb430
SHA512

69592d148f4ad658ecd475f7877cf77b70bafb23516aa2039d32aaf53b1e6d7fe71c4c1bd080a66e9e7dfa53dc699fb6a277965b228b28bd0c453d71a8211bbd
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Mo4qf:qmbhXDmjr5MOtEvwDpj5cDtKkQZQN

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/2960-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002320c-13.dat	CryptoLocker_rule2
behavioral2/memory/2444-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2960-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2444-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/2444-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2960-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2444-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/2960-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000700000002320c-13.dat	UPX
behavioral2/memory/2444-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2960-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2444-27-0x0000000000500000-0x0000000000510000-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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	2024-01-29_f864af345cf606c4ac87316f88b2138f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2444	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 2960 wrote to memory of 2444	2960	2024-01-29_f864af345cf606c4ac87316f88b2138f_cryptolocker.exe	85
PID 2960 wrote to memory of 2444	2960	2024-01-29_f864af345cf606c4ac87316f88b2138f_cryptolocker.exe	85
PID 2960 wrote to memory of 2444	2960	2024-01-29_f864af345cf606c4ac87316f88b2138f_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-01-29_f864af345cf606c4ac87316f88b2138f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-29_f864af345cf606c4ac87316f88b2138f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2960
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2444

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
46KB

MD5
ee8f4463049a4198cd4c1ce727f6a476

SHA1
29e6021ec4f0adb996ef15fb31846cd470cf4513

SHA256
70acb07d9c2f66e1558f4f792d476fad2fd56e372663af1225ce57d66b184fa2

SHA512
cba25a67527f587c5ebfc22ac96f3aecf0ff8b9719aaa807b2b6720575190c9418364443a06686a2218b6dff761e6d82f0e56c9f2c0bddc5c736d44fdfd579a5

Download Submit
memory/2444-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2444-20-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/2444-22-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2444-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2960-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2960-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2960-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2960-3-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/2960-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download