5d804d03b892bb445b826ec1b155a26fab1c40eba546c74c1dd4a389c65cfefd

Analysis

max time kernel
150s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
29/04/2024, 03:23

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General

Target

2024-04-29_045a1f6b7ef215e3b15c55ff87cb4cfd_cryptolocker.exe
Size

58KB
MD5

045a1f6b7ef215e3b15c55ff87cb4cfd
SHA1

2c035e9094f2488f4c2dc9901d2a5f8f174e5db4
SHA256

5d804d03b892bb445b826ec1b155a26fab1c40eba546c74c1dd4a389c65cfefd
SHA512

cf2f7df86430d845552f4f8a5dd70917c6cf27ad74eb14615aba197672cd733da8e3f84c01086ce374b97eb577e8f73cdd811188a2c7053525bc0147f7790f92
SSDEEP

768:H6LsoEEeegiZPvEhHSG+gk5NQXtckstOOtEvwDpjhBaD3TUogs/VXpAPBC:H6QFElP6n+gou9cvMOtEvwDpjCpVXYC

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4000-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b58-13.dat	CryptoLocker_rule2
behavioral2/memory/4000-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2724-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2724-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4000-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023b58-13.dat	CryptoLocker_set1
behavioral2/memory/4000-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2724-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2724-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4000-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000c000000023b58-13.dat	UPX
behavioral2/memory/4000-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2724-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2724-27-0x0000000000500000-0x0000000000510000-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-1-5-21-17203666-93769886-2545153620-1000\Control Panel\International\Geo\Nation	2024-04-29_045a1f6b7ef215e3b15c55ff87cb4cfd_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2724	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4000-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000c000000023b58-13.dat	upx
behavioral2/memory/4000-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2724-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2724-27-0x0000000000500000-0x0000000000510000-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 4000 wrote to memory of 2724	4000	2024-04-29_045a1f6b7ef215e3b15c55ff87cb4cfd_cryptolocker.exe	83
PID 4000 wrote to memory of 2724	4000	2024-04-29_045a1f6b7ef215e3b15c55ff87cb4cfd_cryptolocker.exe	83
PID 4000 wrote to memory of 2724	4000	2024-04-29_045a1f6b7ef215e3b15c55ff87cb4cfd_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-04-29_045a1f6b7ef215e3b15c55ff87cb4cfd_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-29_045a1f6b7ef215e3b15c55ff87cb4cfd_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4000
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2724

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
58KB

MD5
cf63bef345d9a6a3e3c53dbd8d773fe8

SHA1
d54f496b05d96c1f9724fcfaab3dc3eb1c220d01

SHA256
c2087c0cd6375eb8c879437f2a8155dd171ac11685601be0a33bd4eaf560081e

SHA512
a7673de4064a75722d487bb1818af33da35dcf1053cf79b83feb58043c8e924a22485e60996335716b1e93b2853df11b9b81537ad76fc9377f94df7cea1cf813

Download Submit
memory/2724-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2724-21-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/2724-26-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2724-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4000-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4000-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4000-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4000-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4000-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download