a9331d29d4c999d2b9bf314a41e39a05e21b91d813025cc55612f98fd877a0c6

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
10-05-2024 04:29

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General

Target

2024-05-10_3bc6f0b30fb4159142ccf93af72fdac8_cryptolocker.exe
Size

51KB
MD5

3bc6f0b30fb4159142ccf93af72fdac8
SHA1

1cd2a236194a78b61f725f4811184a3149952997
SHA256

a9331d29d4c999d2b9bf314a41e39a05e21b91d813025cc55612f98fd877a0c6
SHA512

1d4b9fb8c0ec5a287e5d270e28793bcefef3637dad68c937be9cee357e2cfcbada71764b26ee32db6a35bcd771d8cb32a403a515d3e4e22ee4cb17469ee8ec5a
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtO2:bODOw9acifAoc+vZ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3204-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000023308-13.dat	CryptoLocker_rule2
behavioral2/memory/1220-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3204-18-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1220-27-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3204-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/files/0x0006000000023308-13.dat	UPX
behavioral2/memory/1220-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/3204-18-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/1220-27-0x0000000008000000-0x000000000800F000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	2024-05-10_3bc6f0b30fb4159142ccf93af72fdac8_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1220	lossy.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3204-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/files/0x0006000000023308-13.dat	upx
behavioral2/memory/1220-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/3204-18-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/1220-27-0x0000000008000000-0x000000000800F000-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

description	pid	Process	procid_target
PID 3204 wrote to memory of 1220	3204	2024-05-10_3bc6f0b30fb4159142ccf93af72fdac8_cryptolocker.exe	83
PID 3204 wrote to memory of 1220	3204	2024-05-10_3bc6f0b30fb4159142ccf93af72fdac8_cryptolocker.exe	83
PID 3204 wrote to memory of 1220	3204	2024-05-10_3bc6f0b30fb4159142ccf93af72fdac8_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-10_3bc6f0b30fb4159142ccf93af72fdac8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-10_3bc6f0b30fb4159142ccf93af72fdac8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3204
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:1220

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\lossy.exe

Filesize
51KB

MD5
24398f5331a2b644d1fa26fbf1464b38

SHA1
493d790f77fc2a9540f4d378f0d920cb90185876

SHA256
67fe3bb5700440aae0bc6365ec36c46935c8f5b0d1ffd7056362d29cab10d7c7

SHA512
fa5ac28f5fc358a895eb29ace1d937d74494be58d3c091ca9946991795345d4e2a094f9009c5fd8e90c43a36de07224a663dfe7dfdbc46a0dc919ca069740590

Download Submit
memory/1220-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/1220-20-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/1220-26-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1220-27-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3204-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3204-1-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/3204-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3204-9-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/3204-18-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download