5eaa5fc42eda2ac7988340d23e0ef9d394a8500f4c11c2a0271f0a90516029a3

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
16/05/2024, 19:35

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General

Target

2024-05-16_3aa118c7d24c7223448df16220fe0c5b_cryptolocker.exe
Size

52KB
MD5

3aa118c7d24c7223448df16220fe0c5b
SHA1

43bd4d447630ffaca5de6726b2bf097b4b2253a2
SHA256

5eaa5fc42eda2ac7988340d23e0ef9d394a8500f4c11c2a0271f0a90516029a3
SHA512

626574e31fc2a4f3f254c005a8e4a1efdbff3c9c7c221f8597e04c022f6a7e444d532db73109cd638baf6b46735add6364a4c9ad8bd0195d9918b4c429b0a6bb
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOh:bODOw9acifAoc+v2

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1040-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023297-16.dat	CryptoLocker_rule2
behavioral2/memory/3556-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3556-26-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1040-27-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1040-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/files/0x0007000000023297-16.dat	UPX
behavioral2/memory/3556-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/3556-26-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/1040-27-0x0000000008000000-0x000000000800F000-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-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	2024-05-16_3aa118c7d24c7223448df16220fe0c5b_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1040	lossy.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1040-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/files/0x0007000000023297-16.dat	upx
behavioral2/memory/3556-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/3556-26-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/1040-27-0x0000000008000000-0x000000000800F000-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 3556 wrote to memory of 1040	3556	2024-05-16_3aa118c7d24c7223448df16220fe0c5b_cryptolocker.exe	82
PID 3556 wrote to memory of 1040	3556	2024-05-16_3aa118c7d24c7223448df16220fe0c5b_cryptolocker.exe	82
PID 3556 wrote to memory of 1040	3556	2024-05-16_3aa118c7d24c7223448df16220fe0c5b_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-16_3aa118c7d24c7223448df16220fe0c5b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-16_3aa118c7d24c7223448df16220fe0c5b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3556
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:1040

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
cffe293d51e5b544ffdd43ed486de1f3

SHA1
000cc929773bc72624793b8bc5222e849260c61e

SHA256
276df0880c96733c646ce91b50341566cbd3c9a524b7e1bef5fbe44b80240270

SHA512
be275687f6a528b2b827a7ed4caaedc1bb2c431096bc7679d95e7fc15b3574a14381a51fa4ac4bd3bb200cc27ea324961b01338c66b2ced2b9258e4661fb6260

Download Submit
memory/1040-25-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/1040-19-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/1040-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/1040-27-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3556-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/3556-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/3556-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/3556-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3556-26-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download