447b5085cd021434f14a0792f9cbfe3332feaf941a0f7b8c5faaded97f165d10

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
28/01/2024, 19:30

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General

Target

2024-01-28_8cb96f18b27e598ac570cfcb0f9c53f4_cryptolocker.exe
Size

63KB
MD5

8cb96f18b27e598ac570cfcb0f9c53f4
SHA1

efd1676f37195cf21702a9e0720324ea4901c67b
SHA256

447b5085cd021434f14a0792f9cbfe3332feaf941a0f7b8c5faaded97f165d10
SHA512

dd20bb448348737dc005b1027647c3b179ce44693b4d96c0362efc6d15eb308eb36a464c4c481032ada34e138967656b49b5f947261deb2d9536072ad8492e09
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYibAoe:1nK6a+qdOOtEvwDpjM

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1044-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000231e2-13.dat	CryptoLocker_rule2
behavioral2/memory/1044-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1920-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1044-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00070000000231e2-13.dat	CryptoLocker_set1
behavioral2/memory/1044-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/1920-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1044-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x00070000000231e2-13.dat	UPX
behavioral2/memory/1044-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/1920-26-0x0000000000500000-0x000000000050F311-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-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation	2024-01-28_8cb96f18b27e598ac570cfcb0f9c53f4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1920	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1044-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x00070000000231e2-13.dat	upx
behavioral2/memory/1044-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/1920-26-0x0000000000500000-0x000000000050F311-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 1044 wrote to memory of 1920	1044	2024-01-28_8cb96f18b27e598ac570cfcb0f9c53f4_cryptolocker.exe	84
PID 1044 wrote to memory of 1920	1044	2024-01-28_8cb96f18b27e598ac570cfcb0f9c53f4_cryptolocker.exe	84
PID 1044 wrote to memory of 1920	1044	2024-01-28_8cb96f18b27e598ac570cfcb0f9c53f4_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-01-28_8cb96f18b27e598ac570cfcb0f9c53f4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-28_8cb96f18b27e598ac570cfcb0f9c53f4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1044
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1920

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
63KB

MD5
f23d439987759c10a200e68898722b4b

SHA1
95b01bbb3849b5af51108f464312b434b0ec9926

SHA256
295b16fe8718893c27cedef4cdf6c1b0ea8f482176832739d9633a030d05a882

SHA512
c085d8ad243f6f1fde823aefa77bce5627f126c18b5b3d7864585a278d68b9d5996ad348d94d39c3c6afc26f5e4404cacb10c744350d4bbd7e33f5302f82f8b4

Download Submit
memory/1044-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1044-1-0x0000000000870000-0x0000000000876000-memory.dmp

Filesize
24KB

Download
memory/1044-2-0x0000000000870000-0x0000000000876000-memory.dmp

Filesize
24KB

Download
memory/1044-3-0x00000000008A0000-0x00000000008A6000-memory.dmp

Filesize
24KB

Download
memory/1044-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1920-20-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/1920-19-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/1920-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download