ece5ad551199df059cda82742a7f63acdabc41dce540c356061d8b929ccae429

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
12/03/2024, 20:42

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General

Target

2024-03-12_eb873ffd4adf5f15a375368355607d97_cryptolocker.exe
Size

30KB
MD5

eb873ffd4adf5f15a375368355607d97
SHA1

56ba7951dfe1eaddf4795f53a0ac6f112cfe0970
SHA256

ece5ad551199df059cda82742a7f63acdabc41dce540c356061d8b929ccae429
SHA512

022cb4715d22ce1b5d6f94837614fa2749ad93eb7b3b1707196c21f6495df4f1d2f049d0e56b182505c8f88b4c927ab60f17f5bbd7a2298ef8641aef76adf51c
SSDEEP

768:bFKGtXi0sh3VD4dniNfjfI0S16avdrQFiLjJvtd:bFxhi0shVD4diNT7oc+vd

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3656-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0004000000022747-13.dat	CryptoLocker_rule2
behavioral2/memory/3656-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4980-26-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3656-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/files/0x0004000000022747-13.dat	UPX
behavioral2/memory/3656-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/4980-26-0x0000000008000000-0x000000000800F000-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-1-5-21-2727153400-192325109-1870347593-1000\Control Panel\International\Geo\Nation	2024-03-12_eb873ffd4adf5f15a375368355607d97_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4980	lossy.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3656-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/files/0x0004000000022747-13.dat	upx
behavioral2/memory/3656-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/4980-26-0x0000000008000000-0x000000000800F000-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 3656 wrote to memory of 4980	3656	2024-03-12_eb873ffd4adf5f15a375368355607d97_cryptolocker.exe	90
PID 3656 wrote to memory of 4980	3656	2024-03-12_eb873ffd4adf5f15a375368355607d97_cryptolocker.exe	90
PID 3656 wrote to memory of 4980	3656	2024-03-12_eb873ffd4adf5f15a375368355607d97_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-03-12_eb873ffd4adf5f15a375368355607d97_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-12_eb873ffd4adf5f15a375368355607d97_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3656
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:4980

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
30KB

MD5
66f8307adf4129ef30a2c82875275c7c

SHA1
295ab036af7f4c1bbc976ec2cb6e73462452f7e4

SHA256
30afb8f64c8f6212c313802307c22551a92c392f9930df61bab1978887822118

SHA512
5e998c18800949a2cae36ffd354711e9345407ba47233e7f6bcd0a160ff81772119c1da850a8cb882d91d7b1d7a9b8d01318ce636683bcf19cd6ac20dc7b29ca

Download Submit
memory/3656-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3656-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3656-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3656-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/3656-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/4980-19-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4980-20-0x0000000000500000-0x0000000000506000-memory.dmp

Filesize
24KB

Download
memory/4980-26-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download