0f377546c8f6bcddde6de47c882fddd66bd6b172c890e06ee3b82403cdeefccd

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
27-09-2024 03:54

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General

Target

2024-09-27_fa6a6d020a0bbd5e3a4a317db1013637_cryptolocker.exe
Size

55KB
MD5

fa6a6d020a0bbd5e3a4a317db1013637
SHA1

e4fa9d835d0fc694ccfa35ff37e19c7fa35f8ea7
SHA256

0f377546c8f6bcddde6de47c882fddd66bd6b172c890e06ee3b82403cdeefccd
SHA512

94c2fd01f81b5a0180b6f8c2b3d5cc75c5d929006a124f8fd0601409fbe35db67fc969ca8fc3fb0ecc99878db88e4f2ba7ba89756d15a95c08dd9a2a0d72c02d
SSDEEP

768:bco/2n1TCraU6GD1P2wZEjbhxnbcuyD7U9kXDn62tH/1/LpPFP8q:b7/y28wZEjbnouy8G76iH/NLp/

Score

7^/10

discovery upx

Malware Config

Signatures

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-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation	2024-09-27_fa6a6d020a0bbd5e3a4a317db1013637_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1948	rewok.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4120-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x0008000000023430-13.dat	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-09-27_fa6a6d020a0bbd5e3a4a317db1013637_cryptolocker.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rewok.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4120 wrote to memory of 1948	4120	2024-09-27_fa6a6d020a0bbd5e3a4a317db1013637_cryptolocker.exe	82
PID 4120 wrote to memory of 1948	4120	2024-09-27_fa6a6d020a0bbd5e3a4a317db1013637_cryptolocker.exe	82
PID 4120 wrote to memory of 1948	4120	2024-09-27_fa6a6d020a0bbd5e3a4a317db1013637_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-09-27_fa6a6d020a0bbd5e3a4a317db1013637_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-09-27_fa6a6d020a0bbd5e3a4a317db1013637_cryptolocker.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4120
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:1948

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\rewok.exe

Filesize
55KB

MD5
befb90fadbdfa0b60e66646cf4a2bdba

SHA1
7aa8f22a82e16808972a2fd56eaf4afa0838fd0d

SHA256
1b2a55758e5e47e25a58914a276e995afd9c710b181ac58085644195e00aea90

SHA512
46d03145062890633eb09560f7a07a3e6d5559977ac9a730c7a96ea5de18ae5c6beded2a5c9ccf9237f7f328fcb15533d04541e13e90f2cdbf86f708e4c8efe3

Download Submit
memory/1948-26-0x0000000002010000-0x0000000002016000-memory.dmp

Filesize
24KB

Download
memory/4120-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/4120-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4120-2-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4120-3-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download