727609a7662ef071dfcdac5f6da70bef6e00df00d980c72801b74d91d190a82c

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 23:27

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General

Target

2024-05-22_c5452caa39a276d9f919cab0ac0ae112_cryptolocker.exe
Size

52KB
MD5

c5452caa39a276d9f919cab0ac0ae112
SHA1

f4c3e2aa88e069fda0245ecdf00e9eec32c13353
SHA256

727609a7662ef071dfcdac5f6da70bef6e00df00d980c72801b74d91d190a82c
SHA512

73fccc2f75b0b4937e9878dc9f7887631b3fdeb8d29233c48df5f1621d1040494d6c01943a6b3ab98c3a6b7990313c66a8ddfe77952199182419f0da3469e79c
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOn6:bODOw9acifAoc+vs6

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3440-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\lossy.exe	CryptoLocker_rule2
behavioral2/memory/3236-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3440-18-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3236-27-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3440-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\lossy.exe	UPX
behavioral2/memory/3236-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/3440-18-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/3236-27-0x0000000008000000-0x000000000800F000-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

Processes:

2024-05-22_c5452caa39a276d9f919cab0ac0ae112_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	2024-05-22_c5452caa39a276d9f919cab0ac0ae112_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

lossy.exe

pid process

3236 lossy.exe

pid	process
3236	lossy.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3440-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\lossy.exe	upx
behavioral2/memory/3236-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/3440-18-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/3236-27-0x0000000008000000-0x000000000800F000-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

Processes:

2024-05-22_c5452caa39a276d9f919cab0ac0ae112_cryptolocker.exe

description	pid	process	target process
PID 3440 wrote to memory of 3236	3440	2024-05-22_c5452caa39a276d9f919cab0ac0ae112_cryptolocker.exe	lossy.exe
PID 3440 wrote to memory of 3236	3440	2024-05-22_c5452caa39a276d9f919cab0ac0ae112_cryptolocker.exe	lossy.exe
PID 3440 wrote to memory of 3236	3440	2024-05-22_c5452caa39a276d9f919cab0ac0ae112_cryptolocker.exe	lossy.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_c5452caa39a276d9f919cab0ac0ae112_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_c5452caa39a276d9f919cab0ac0ae112_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3440

C:\Users\Admin\AppData\Local\Temp\lossy.exe
"C:\Users\Admin\AppData\Local\Temp\lossy.exe"
2⤵
- Executes dropped EXE
PID:3236

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\lossy.exe
Filesize
52KB

MD5
5b994edd22216e1cdd4144ccc400fa06

SHA1
657bd55c464ef48f6687b9d21dbcd5901432f39a

SHA256
4e8dc5129cb241640b84ddc7b8ecfbbee2678b12f4924a08ab578c16ae062451

SHA512
aecc513fa67872e6c65818acceb442011142e445eee3eb0661c72d0ce4a8f00856e5bd0e4d02291d2f5414135ea73e6a209bf27dffe8ad7e8c3aa0f51a7fd3c8

Download Submit
memory/3236-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3236-20-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3236-26-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/3236-27-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3440-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3440-1-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/3440-2-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/3440-9-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/3440-18-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download