5032e44a5f92eaed784251876af70d501ee45b5a24203a8e13e604179db8ca5d

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
15/03/2024, 13:28

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General

Target

2024-03-15_10d9dfb4aaee875a028af9be0301b22d_cryptolocker.exe
Size

47KB
MD5

10d9dfb4aaee875a028af9be0301b22d
SHA1

92df03e14d4f80b0648c840404d21ed49a3e8211
SHA256

5032e44a5f92eaed784251876af70d501ee45b5a24203a8e13e604179db8ca5d
SHA512

c34f8ffceddbc0f0f332c788a54b40f52d548feb6258857912e9ef11660e6724091051ca77cd935c1612baacb8fc1ae9243650277578cf296547bd86930627b1
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Mo4Xh:qmbhXDmjr5MOtEvwDpj5cDtKkQZQSgK

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1696-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000a00000002321d-13.dat	CryptoLocker_rule2
behavioral2/memory/1696-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1864-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/1696-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1864-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1696-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000a00000002321d-13.dat	UPX
behavioral2/memory/1696-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1864-25-0x0000000000500000-0x0000000000510000-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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	2024-03-15_10d9dfb4aaee875a028af9be0301b22d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1864	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 1696 wrote to memory of 1864	1696	2024-03-15_10d9dfb4aaee875a028af9be0301b22d_cryptolocker.exe	88
PID 1696 wrote to memory of 1864	1696	2024-03-15_10d9dfb4aaee875a028af9be0301b22d_cryptolocker.exe	88
PID 1696 wrote to memory of 1864	1696	2024-03-15_10d9dfb4aaee875a028af9be0301b22d_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-03-15_10d9dfb4aaee875a028af9be0301b22d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-15_10d9dfb4aaee875a028af9be0301b22d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1696
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1864

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
47KB

MD5
2bbfc79e91a6e154842761b023125737

SHA1
4d43bc6984b138f796e276007a880dc39aeedaec

SHA256
939c2bc08f45afa02b4356bc78806978bb0299b991ea1fa66347e3916970c944

SHA512
8341ff3541cd34ab6d9b75fb6dff7cef5a5f1ca719a89030d75980d5ee56ff73a038d0fd907749ed8416c348aa284c81c7f0969ec85606bfae16756d88159c89

Download Submit
memory/1696-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1696-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1696-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1696-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1696-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1864-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download