87ad659cc636c72c5265d9957d02e85fbd6d2ca454ff1099f258cead686e1f0c

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
03-06-2024 12:33

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General

Target

2024-06-03_9312afdb10b242ae3b0a98b8c2fc80e4_cryptolocker.exe
Size

90KB
MD5

9312afdb10b242ae3b0a98b8c2fc80e4
SHA1

72cd8bba5919b055617fc823dd4cad892074eca3
SHA256

87ad659cc636c72c5265d9957d02e85fbd6d2ca454ff1099f258cead686e1f0c
SHA512

8618b0d40d070597a06bece944e984cebe74ef0f1baede9ea0d87770260373b5adf8e85b692a535f8559f669a818a764e78711d877038fed1d0d91df4d568c39
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAyE:n6a+1SEOtEvwDpjYYvQd2Pd

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3000-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000600000002327d-13.dat	CryptoLocker_rule2
behavioral2/memory/3000-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5088-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3000-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000600000002327d-13.dat	CryptoLocker_set1
behavioral2/memory/3000-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5088-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3000-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000600000002327d-13.dat	UPX
behavioral2/memory/3000-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5088-25-0x0000000000500000-0x0000000000510000-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-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	2024-06-03_9312afdb10b242ae3b0a98b8c2fc80e4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5088	asih.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/3000-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000600000002327d-13.dat	upx
behavioral2/memory/3000-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/5088-25-0x0000000000500000-0x0000000000510000-memory.dmp	upx

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 3000 wrote to memory of 5088	3000	2024-06-03_9312afdb10b242ae3b0a98b8c2fc80e4_cryptolocker.exe	81
PID 3000 wrote to memory of 5088	3000	2024-06-03_9312afdb10b242ae3b0a98b8c2fc80e4_cryptolocker.exe	81
PID 3000 wrote to memory of 5088	3000	2024-06-03_9312afdb10b242ae3b0a98b8c2fc80e4_cryptolocker.exe	81

C:\Users\Admin\AppData\Local\Temp\2024-06-03_9312afdb10b242ae3b0a98b8c2fc80e4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_9312afdb10b242ae3b0a98b8c2fc80e4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3000
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5088

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
90KB

MD5
57870b3777019c030cbdfdbacac552bf

SHA1
d29d802c1b722dbf60409fdcb37975f9d271fd21

SHA256
4b07d4c6d6d44a28024698df6abb0b0bf09c6ee3f36888fbf6218bfeb5f8e59a

SHA512
f6e79f5009a2b27c879aedd5295b41f73cb2170f737b738802ed8ce3d33026783cc118a92b88791a0c4e2e8263ca0c72b5f5240fe3d1934cee7636246b6c5b1a

Download Submit
memory/3000-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3000-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3000-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3000-3-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3000-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5088-19-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/5088-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download