2286719e57cf7c94fa8e64245ef9e55c69c9b908a52aa331d9e782ca03d9b9e8

Analysis

max time kernel
150s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
04-05-2024 21:28

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General

Target

2024-05-04_dd2a1dcbff58007aee22d048bb45cd85_cryptolocker.exe
Size

52KB
MD5

dd2a1dcbff58007aee22d048bb45cd85
SHA1

1966fffb70347809f0e397bd6d423211dcd3305c
SHA256

2286719e57cf7c94fa8e64245ef9e55c69c9b908a52aa331d9e782ca03d9b9e8
SHA512

792d60431fb2e8e971da96278771a3c9f2469b3de57fab4fb77b1669c871c6eab64524beacbab0be2c366e2a73b3c9cee7d7904e2f52f79f6c4759d3a1a32bdc
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOXa:bODOw9acifAoc+v8a

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1836-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b41-13.dat	CryptoLocker_rule2
behavioral2/memory/1836-18-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3528-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3528-27-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1836-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/files/0x000c000000023b41-13.dat	UPX
behavioral2/memory/1836-18-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/3528-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/3528-27-0x0000000008000000-0x000000000800F000-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-1-5-21-2860750803-256193626-1801997576-1000\Control Panel\International\Geo\Nation	2024-05-04_dd2a1dcbff58007aee22d048bb45cd85_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3528	lossy.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1836-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/files/0x000c000000023b41-13.dat	upx
behavioral2/memory/1836-18-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/3528-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/3528-27-0x0000000008000000-0x000000000800F000-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 1836 wrote to memory of 3528	1836	2024-05-04_dd2a1dcbff58007aee22d048bb45cd85_cryptolocker.exe	84
PID 1836 wrote to memory of 3528	1836	2024-05-04_dd2a1dcbff58007aee22d048bb45cd85_cryptolocker.exe	84
PID 1836 wrote to memory of 3528	1836	2024-05-04_dd2a1dcbff58007aee22d048bb45cd85_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-05-04_dd2a1dcbff58007aee22d048bb45cd85_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-04_dd2a1dcbff58007aee22d048bb45cd85_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1836
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:3528

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
9c0253f10cd25b0dbe59373b49c8c656

SHA1
af27bd9c1d4791cef9605811674a22cc81cf1779

SHA256
e30cadd5e7fdf3c50d9f6e2af66bbd8e57ebfdd8ec63482d9bf95b4f07f721ae

SHA512
4495af7e2678df62e49eda1439e0f91bfb32cb56229eb4de891628ff9676b5ebd247d3247cac92239b8281bd7d19869973a0df2209f328dc64e51e1206ec1157

Download Submit
memory/1836-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/1836-1-0x0000000001FC0000-0x0000000001FC6000-memory.dmp

Filesize
24KB

Download
memory/1836-2-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/1836-9-0x0000000001FC0000-0x0000000001FC6000-memory.dmp

Filesize
24KB

Download
memory/1836-18-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3528-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3528-26-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/3528-20-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/3528-27-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download