424cc040f663dea39aebd3bbab6907c0d6a724f8fe19600701fe2b33492b4672

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
10/06/2024, 12:51

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General

Target

2024-06-10_d85dc19e5951affe65db3a9e98a6bde2_cryptolocker.exe
Size

53KB
MD5

d85dc19e5951affe65db3a9e98a6bde2
SHA1

d6e20d704a07592d1030b3d6100c36eb31fec259
SHA256

424cc040f663dea39aebd3bbab6907c0d6a724f8fe19600701fe2b33492b4672
SHA512

5fbedaadb06de88e7b5aa384397bd55be11538ba1de58b2686156dd335cdf3c277999ce062a4ced26bd65156094814d57f07f970c36879dca9d6850bf1567931
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTOfi:z6QFElP6n+gKmddpMOtEvwDpj31ia

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/540-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000022f51-13.dat	CryptoLocker_rule2
behavioral2/memory/4204-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/540-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4204-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/540-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000022f51-13.dat	CryptoLocker_set1
behavioral2/memory/4204-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/540-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4204-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/540-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000022f51-13.dat	UPX
behavioral2/memory/4204-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/540-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4204-27-0x0000000000500000-0x0000000000510000-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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-06-10_d85dc19e5951affe65db3a9e98a6bde2_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4204	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/540-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000022f51-13.dat	upx
behavioral2/memory/4204-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/540-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4204-27-0x0000000000500000-0x0000000000510000-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 540 wrote to memory of 4204	540	2024-06-10_d85dc19e5951affe65db3a9e98a6bde2_cryptolocker.exe	83
PID 540 wrote to memory of 4204	540	2024-06-10_d85dc19e5951affe65db3a9e98a6bde2_cryptolocker.exe	83
PID 540 wrote to memory of 4204	540	2024-06-10_d85dc19e5951affe65db3a9e98a6bde2_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-06-10_d85dc19e5951affe65db3a9e98a6bde2_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-10_d85dc19e5951affe65db3a9e98a6bde2_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:540
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4204

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
53KB

MD5
f4cbfd974b1718dc428ed7d82075fa6e

SHA1
125578f95401a2400a2bef08ed31a4e9a007e84e

SHA256
88b3f935059d3ecb3f29f4810c8bac822c6dbf3b42bb2c73faed2f00d1a62f4e

SHA512
8bfdf97828289cf672ae3b55ff4ea00a9ba341c067c36b7bc831c1363d3450158472c50fafb6b0f9ff658abfcd663fae923494bc23b2ac36a8ae81658cc363d0

Download Submit
memory/540-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/540-1-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/540-2-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/540-9-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/540-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4204-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4204-20-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/4204-26-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4204-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download