bd7dd33a51d7b8f45955dcbbed0aefdbefa5ec275032be9bbbd355a208ec6dca

Analysis

max time kernel
150s
max time network
146s
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 21:08

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General

Target

2024-05-22_f5dd6718ca76c4172b4b2e0222f611aa_cryptolocker.exe
Size

52KB
MD5

f5dd6718ca76c4172b4b2e0222f611aa
SHA1

678a66f1cd2412f82ffe2eda528844043306c870
SHA256

bd7dd33a51d7b8f45955dcbbed0aefdbefa5ec275032be9bbbd355a208ec6dca
SHA512

86d7ceef7815ab02a5ce84568072dda46a50973385db7e9859049c127f444e40cf176de54e7ea0e9b1226cfad5f9cbf5eb25053924f66969efdc9b66d28e6ddb
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOna:bODOw9acifAoc+vsa

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3100-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\lossy.exe	CryptoLocker_rule2
behavioral2/memory/2980-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3100-18-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2980-27-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3100-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\lossy.exe	UPX
behavioral2/memory/2980-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/3100-18-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/2980-27-0x0000000008000000-0x000000000800F000-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_f5dd6718ca76c4172b4b2e0222f611aa_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-22_f5dd6718ca76c4172b4b2e0222f611aa_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

lossy.exe

pid process

2980 lossy.exe

pid	process
2980	lossy.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3100-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\lossy.exe	upx
behavioral2/memory/2980-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/3100-18-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/2980-27-0x0000000008000000-0x000000000800F000-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_f5dd6718ca76c4172b4b2e0222f611aa_cryptolocker.exe

description	pid	process	target process
PID 3100 wrote to memory of 2980	3100	2024-05-22_f5dd6718ca76c4172b4b2e0222f611aa_cryptolocker.exe	lossy.exe
PID 3100 wrote to memory of 2980	3100	2024-05-22_f5dd6718ca76c4172b4b2e0222f611aa_cryptolocker.exe	lossy.exe
PID 3100 wrote to memory of 2980	3100	2024-05-22_f5dd6718ca76c4172b4b2e0222f611aa_cryptolocker.exe	lossy.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_f5dd6718ca76c4172b4b2e0222f611aa_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_f5dd6718ca76c4172b4b2e0222f611aa_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3100
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:2980

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
52KB

MD5
c00e295e8dab27910f299d187d24e320

SHA1
14d481fc655579978db8e310a22306cded9434bf

SHA256
24b451042f144d0987c0662f10430bdca13ade8c107ecc1100699e3d31fed991

SHA512
68e7a8e8b5b6ba2baf40a5a1e037266b84bd286e9e9d2d5c1950bdeff6899786665e6c097a50e27a1f3e663540a72fa3301fc83cf665d0273751ddb6c863beb1

Download Submit
memory/2980-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2980-20-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

Filesize
24KB

Download
memory/2980-26-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/2980-27-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3100-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3100-1-0x00000000020C0000-0x00000000020C6000-memory.dmp

Filesize
24KB

Download
memory/3100-2-0x00000000020C0000-0x00000000020C6000-memory.dmp

Filesize
24KB

Download
memory/3100-3-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/3100-18-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download