8fe9f567ca65088fe2cbb3e6a8e25bbc7bf0dec57d16776b998dbd21f09bc339

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
27/04/2024, 04:58

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General

Target

2024-04-27_8fc0f93bb33f561bbd86c32fe1357b0b_cryptolocker.exe
Size

88KB
MD5

8fc0f93bb33f561bbd86c32fe1357b0b
SHA1

1263dc463458510ffa906a96f37eb1c6b0a981ba
SHA256

8fe9f567ca65088fe2cbb3e6a8e25bbc7bf0dec57d16776b998dbd21f09bc339
SHA512

c923ef8f78342eaad67aa81b84024376f1824b05796721e9ed7cb0eba89050c911a76e7cbbd8aae31339ca2356281c38c7cb062876b7ccdd63cd252862754a2d
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRMy8tyblW:zCsanOtEvwDpj1

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/5000-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000d000000023ae8-13.dat	CryptoLocker_rule2
behavioral2/memory/4424-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5000-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4424-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/5000-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000d000000023ae8-13.dat	CryptoLocker_set1
behavioral2/memory/4424-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5000-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4424-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/5000-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000d000000023ae8-13.dat	UPX
behavioral2/memory/4424-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5000-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4424-27-0x0000000000500000-0x0000000000510000-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-1-5-21-2860750803-256193626-1801997576-1000\Control Panel\International\Geo\Nation	2024-04-27_8fc0f93bb33f561bbd86c32fe1357b0b_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4424	misid.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5000-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000d000000023ae8-13.dat	upx
behavioral2/memory/4424-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/5000-25-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4424-27-0x0000000000500000-0x0000000000510000-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 5000 wrote to memory of 4424	5000	2024-04-27_8fc0f93bb33f561bbd86c32fe1357b0b_cryptolocker.exe	84
PID 5000 wrote to memory of 4424	5000	2024-04-27_8fc0f93bb33f561bbd86c32fe1357b0b_cryptolocker.exe	84
PID 5000 wrote to memory of 4424	5000	2024-04-27_8fc0f93bb33f561bbd86c32fe1357b0b_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-04-27_8fc0f93bb33f561bbd86c32fe1357b0b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_8fc0f93bb33f561bbd86c32fe1357b0b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5000
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:4424

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\misid.exe

Filesize
88KB

MD5
9e85f439956e350f66666541f9a2b65a

SHA1
1398fa351e381d08a6d86b5c30bc63e62ade3b50

SHA256
4cb1bc074423cbea09fca5149881fc93cda387c980d2f47b71f3039f3b4d0a6c

SHA512
ec7220e6753a7c11d04ac2751655ff3cbdf5c02026e38384e0f8b5caf1dded9b4d5e42cf07c767ff7b6704752f3194f0c23ec5640841784ab56979a580303778

Download Submit
memory/4424-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4424-19-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/4424-26-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/4424-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5000-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5000-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5000-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/5000-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5000-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download