587864520fc37185415089703153000ed84767da879cf5c04a20152bb7b7af40

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
29-08-2024 08:25

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General

Target

2024-08-29_d1bd9b8f4aa519c4ef53f430d85f4f21_cryptolocker.exe
Size

64KB
MD5

d1bd9b8f4aa519c4ef53f430d85f4f21
SHA1

b32a3702e43668acf52f21d4dddaccfa59d50c35
SHA256

587864520fc37185415089703153000ed84767da879cf5c04a20152bb7b7af40
SHA512

c1e56418ae2b5b0974eea66f73d7b0d9959b53df8b8da3e88c9ec3a76c7de2dc4cb16c40bc9a06c8b794ba9a794c4cb7401ac663e99516f2e0982279f8c59ab7
SSDEEP

768:P8mnjO6LsoEEeegiZPvEhHSG+gbum/kLyMro2GtOOtEvwDpjKvWxHCbSVaFn0jKm:P8mnK6QFElP6n+gymddpMOtEvwDpjYMd

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-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	2024-08-29_d1bd9b8f4aa519c4ef53f430d85f4f21_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4724	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3876-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x00090000000233eb-13.dat	upx
behavioral2/memory/3876-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4724-26-0x0000000000500000-0x000000000050F311-memory.dmp	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	2024-08-29_d1bd9b8f4aa519c4ef53f430d85f4f21_cryptolocker.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3876 wrote to memory of 4724	3876	2024-08-29_d1bd9b8f4aa519c4ef53f430d85f4f21_cryptolocker.exe	84
PID 3876 wrote to memory of 4724	3876	2024-08-29_d1bd9b8f4aa519c4ef53f430d85f4f21_cryptolocker.exe	84
PID 3876 wrote to memory of 4724	3876	2024-08-29_d1bd9b8f4aa519c4ef53f430d85f4f21_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-08-29_d1bd9b8f4aa519c4ef53f430d85f4f21_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-08-29_d1bd9b8f4aa519c4ef53f430d85f4f21_cryptolocker.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3876
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:4724

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\asih.exe

Filesize
64KB

MD5
b37c81949a07bf06242f13d15c32d471

SHA1
85f9a501c6efdeb1f391ac4e8e3f40494d8d6728

SHA256
d72c3a81c99625f8fa7cc59d3e820ada82aa15342ceb3d37e2d4eaca255af239

SHA512
e24f46626c7448517877720508c453f566ab25357dde47659d138157994a132bfff48686025cff5269c0569eb879a9ec0c0f2fcb507e51b560229f10df3166d9

Download Submit
memory/3876-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3876-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3876-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3876-3-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/3876-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4724-25-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/4724-19-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/4724-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download