d5cb9a3212768113db20f53409e9bf3b084a399e32f71c2af5e3a0a14f2116d8

Analysis

max time kernel
148s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 21:53

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General

Target

2024-05-22_b74b50566216c4b027b6730633c26615_cryptolocker.exe
Size

64KB
MD5

b74b50566216c4b027b6730633c26615
SHA1

48025bab3abd3884c664ae21c1b98c11f9eff1e7
SHA256

d5cb9a3212768113db20f53409e9bf3b084a399e32f71c2af5e3a0a14f2116d8
SHA512

d7560e59fab7605ee4e93d1bf57829b0ca7eb9cedf6e3a5c3b84fc7ee4946b0d289b34ee8e7e042767865e587d6ca189b35ae9842de4fd4cbde70a60e77be9ac
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsiW:BbdDmjr+OtEvwDpjM8D

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1964-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/1964-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/996-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1964-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/996-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1964-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/1964-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/996-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_b74b50566216c4b027b6730633c26615_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	2024-05-22_b74b50566216c4b027b6730633c26615_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

996 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
996	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-22_b74b50566216c4b027b6730633c26615_cryptolocker.exe

description	pid	process	target process
PID 1964 wrote to memory of 996	1964	2024-05-22_b74b50566216c4b027b6730633c26615_cryptolocker.exe	asih.exe
PID 1964 wrote to memory of 996	1964	2024-05-22_b74b50566216c4b027b6730633c26615_cryptolocker.exe	asih.exe
PID 1964 wrote to memory of 996	1964	2024-05-22_b74b50566216c4b027b6730633c26615_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_b74b50566216c4b027b6730633c26615_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_b74b50566216c4b027b6730633c26615_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1964
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:996

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
64KB

MD5
4010efe37df4ed8a17f9aacd2a92e6f8

SHA1
90338f594dcf40d02b4a3002c0bf643aa2ca6a8a

SHA256
e58e2a77e205e6cfcaadaf75b49e8da2a5c627821c871c5a4064e8c60bb4cf0a

SHA512
d70bb3a602eac51cc43a2e2a1877ca32177effca38f273149e3fb02732821d354d67f6def464e374bc25f3a1a7fe90b9cd257384a80950c08e15700388486cf9

Download Submit
memory/996-20-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/996-26-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/996-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1964-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1964-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/1964-8-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/1964-2-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/1964-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download