0c808ba475b732bb6c9ccd8b9bd6a1bd6d7ce5932775eaccc3b81b6c50c69773

Analysis

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

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
30/04/2024, 21:08

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General

Target

2024-04-30_3c967c0086bc366cebc97f5fb9c2dec1_cryptolocker.exe
Size

55KB
MD5

3c967c0086bc366cebc97f5fb9c2dec1
SHA1

8983df67f5eee2d5b91975526011cfd7c8a978a7
SHA256

0c808ba475b732bb6c9ccd8b9bd6a1bd6d7ce5932775eaccc3b81b6c50c69773
SHA512

a7fdebae1e666a066d1a0e3287bc17811c765de03c919360a007f52fb471b04546dcb5e4d5d358ce292bcc9c347bc7777715c99f8bcc5a52ddfd03411c0c250c
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjNw:bP9g/xtCS3Dxx0D

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 2 IoCs

resource	yara_rule
behavioral2/memory/3980-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000b000000023b7f-13.dat	CryptoLocker_rule2

UPX dump on OEP (original entry point) 2 IoCs

resource	yara_rule
behavioral2/memory/3980-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x000b000000023b7f-13.dat	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-1-5-21-3726321484-1950364574-433157660-1000\Control Panel\International\Geo\Nation	2024-04-30_3c967c0086bc366cebc97f5fb9c2dec1_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2360	gewos.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3980-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x000b000000023b7f-13.dat	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 3980 wrote to memory of 2360	3980	2024-04-30_3c967c0086bc366cebc97f5fb9c2dec1_cryptolocker.exe	83
PID 3980 wrote to memory of 2360	3980	2024-04-30_3c967c0086bc366cebc97f5fb9c2dec1_cryptolocker.exe	83
PID 3980 wrote to memory of 2360	3980	2024-04-30_3c967c0086bc366cebc97f5fb9c2dec1_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-04-30_3c967c0086bc366cebc97f5fb9c2dec1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-30_3c967c0086bc366cebc97f5fb9c2dec1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3980
- C:\Users\Admin\AppData\Local\Temp\gewos.exe
  "C:\Users\Admin\AppData\Local\Temp\gewos.exe"
  2⤵
  - Executes dropped EXE
  PID:2360

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\gewos.exe

Filesize
55KB

MD5
11f3d6992163f7600bcf8517f0322280

SHA1
50990c827f81c8aca391b222e0def1e747d0f522

SHA256
9546483489c7452fe798193e5e5d9f4e8df000d69233ad6361dd3b634dad0557

SHA512
c5e02e0ac0f8a22dd09090741a3d97d65e87aed8a4ab791c5f7575ac1af81080c7e9306af5682c4d6fa7a82d8c3f061585507af7880f99ab5fdc69830741f0ec

Download Submit
memory/2360-26-0x00000000020A0000-0x00000000020A6000-memory.dmp

Filesize
24KB

Download
memory/3980-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/3980-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3980-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3980-9-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download