djvu | ce518507120b7ae648448386a36242e32aa7448f7a0a04b388f5d2ce6451ac16

Analysis

max time kernel
174s
max time network
186s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
30/12/2023, 08:19

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General

Target

133f6d59b0922074f34b85cc18e5fc8c.exe
Size

799KB
MD5

133f6d59b0922074f34b85cc18e5fc8c
SHA1

b308f99cf0a6abe5bed4f4153f36fdd0c6efb55b
SHA256

ce518507120b7ae648448386a36242e32aa7448f7a0a04b388f5d2ce6451ac16
SHA512

dfaf2556a22d0282e6e1de477c1f0e5f3cf847eb416adc671d7ee108bb267ce2eb34c22ffdb931a804f01670a1db9bd6faf6547abe3a0d22fddae1eb830a53db
SSDEEP

24576:9kBKLKWeLtatcD5b9IbloyS5l6jLpcCh5aHTlHLm:2QneLtUcDN9IblUz6vja8

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://astdg.top/fhsgtsspen6/get.php

Attributes

extension
.nooa
offline_id
PLtnD1U6oAmgxgJ2nJik1mY9SwUQg07CiN0zSet1
payload_url
http://securebiz.org/dl/build2.exe

http://astdg.top/files/1/build3.exe
ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-CnI3tI6Ktv Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0322gDrgo

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 11 IoCs

resource	yara_rule
behavioral2/memory/2996-2-0x0000000003310000-0x000000000342B000-memory.dmp	family_djvu
behavioral2/memory/1144-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1144-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1144-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1144-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1144-18-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1144-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1952-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1952-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1144-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1952-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	133f6d59b0922074f34b85cc18e5fc8c.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4900	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\a60d409e-150e-4f5e-8978-5c975e4e7f70\\133f6d59b0922074f34b85cc18e5fc8c.exe\" --AutoStart"	133f6d59b0922074f34b85cc18e5fc8c.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
55	api.2ip.ua
57	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2996 set thread context of 1144	2996	133f6d59b0922074f34b85cc18e5fc8c.exe	91
PID 4452 set thread context of 1952	4452	133f6d59b0922074f34b85cc18e5fc8c.exe	101

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

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3004	1952	WerFault.exe	101
3908	1952	WerFault.exe	101

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1144	133f6d59b0922074f34b85cc18e5fc8c.exe
1144	133f6d59b0922074f34b85cc18e5fc8c.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 2996 wrote to memory of 1144	2996	133f6d59b0922074f34b85cc18e5fc8c.exe	91
PID 2996 wrote to memory of 1144	2996	133f6d59b0922074f34b85cc18e5fc8c.exe	91
PID 2996 wrote to memory of 1144	2996	133f6d59b0922074f34b85cc18e5fc8c.exe	91
PID 2996 wrote to memory of 1144	2996	133f6d59b0922074f34b85cc18e5fc8c.exe	91
PID 2996 wrote to memory of 1144	2996	133f6d59b0922074f34b85cc18e5fc8c.exe	91
PID 2996 wrote to memory of 1144	2996	133f6d59b0922074f34b85cc18e5fc8c.exe	91
PID 2996 wrote to memory of 1144	2996	133f6d59b0922074f34b85cc18e5fc8c.exe	91
PID 2996 wrote to memory of 1144	2996	133f6d59b0922074f34b85cc18e5fc8c.exe	91
PID 2996 wrote to memory of 1144	2996	133f6d59b0922074f34b85cc18e5fc8c.exe	91
PID 2996 wrote to memory of 1144	2996	133f6d59b0922074f34b85cc18e5fc8c.exe	91
PID 1144 wrote to memory of 4900	1144	133f6d59b0922074f34b85cc18e5fc8c.exe	96
PID 1144 wrote to memory of 4900	1144	133f6d59b0922074f34b85cc18e5fc8c.exe	96
PID 1144 wrote to memory of 4900	1144	133f6d59b0922074f34b85cc18e5fc8c.exe	96
PID 1144 wrote to memory of 4452	1144	133f6d59b0922074f34b85cc18e5fc8c.exe	99
PID 1144 wrote to memory of 4452	1144	133f6d59b0922074f34b85cc18e5fc8c.exe	99
PID 1144 wrote to memory of 4452	1144	133f6d59b0922074f34b85cc18e5fc8c.exe	99
PID 4452 wrote to memory of 1952	4452	133f6d59b0922074f34b85cc18e5fc8c.exe	101
PID 4452 wrote to memory of 1952	4452	133f6d59b0922074f34b85cc18e5fc8c.exe	101
PID 4452 wrote to memory of 1952	4452	133f6d59b0922074f34b85cc18e5fc8c.exe	101
PID 4452 wrote to memory of 1952	4452	133f6d59b0922074f34b85cc18e5fc8c.exe	101
PID 4452 wrote to memory of 1952	4452	133f6d59b0922074f34b85cc18e5fc8c.exe	101
PID 4452 wrote to memory of 1952	4452	133f6d59b0922074f34b85cc18e5fc8c.exe	101
PID 4452 wrote to memory of 1952	4452	133f6d59b0922074f34b85cc18e5fc8c.exe	101
PID 4452 wrote to memory of 1952	4452	133f6d59b0922074f34b85cc18e5fc8c.exe	101
PID 4452 wrote to memory of 1952	4452	133f6d59b0922074f34b85cc18e5fc8c.exe	101
PID 4452 wrote to memory of 1952	4452	133f6d59b0922074f34b85cc18e5fc8c.exe	101
PID 1952 wrote to memory of 3004	1952	133f6d59b0922074f34b85cc18e5fc8c.exe	106
PID 1952 wrote to memory of 3004	1952	133f6d59b0922074f34b85cc18e5fc8c.exe	106
PID 1952 wrote to memory of 3004	1952	133f6d59b0922074f34b85cc18e5fc8c.exe	106

C:\Users\Admin\AppData\Local\Temp\133f6d59b0922074f34b85cc18e5fc8c.exe
"C:\Users\Admin\AppData\Local\Temp\133f6d59b0922074f34b85cc18e5fc8c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2996
- C:\Users\Admin\AppData\Local\Temp\133f6d59b0922074f34b85cc18e5fc8c.exe
  "C:\Users\Admin\AppData\Local\Temp\133f6d59b0922074f34b85cc18e5fc8c.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1144
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\a60d409e-150e-4f5e-8978-5c975e4e7f70" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4900
- - C:\Users\Admin\AppData\Local\Temp\133f6d59b0922074f34b85cc18e5fc8c.exe
    "C:\Users\Admin\AppData\Local\Temp\133f6d59b0922074f34b85cc18e5fc8c.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4452
  - - C:\Users\Admin\AppData\Local\Temp\133f6d59b0922074f34b85cc18e5fc8c.exe
      "C:\Users\Admin\AppData\Local\Temp\133f6d59b0922074f34b85cc18e5fc8c.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1952
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 1952 -s 568
        5⤵
        Program crash
        
        PID:3004
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 1952 -s 568
        5⤵
        Program crash
        
        PID:3908

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 1952 -ip 1952
1⤵
PID:4796

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

File and Directory Permissions Modification

T1222

Modify Registry

T1112

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\a60d409e-150e-4f5e-8978-5c975e4e7f70\133f6d59b0922074f34b85cc18e5fc8c.exe

Filesize
799KB

MD5
133f6d59b0922074f34b85cc18e5fc8c

SHA1
b308f99cf0a6abe5bed4f4153f36fdd0c6efb55b

SHA256
ce518507120b7ae648448386a36242e32aa7448f7a0a04b388f5d2ce6451ac16

SHA512
dfaf2556a22d0282e6e1de477c1f0e5f3cf847eb416adc671d7ee108bb267ce2eb34c22ffdb931a804f01670a1db9bd6faf6547abe3a0d22fddae1eb830a53db

Download Submit
memory/1144-18-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1144-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1144-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1144-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1144-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1144-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1144-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1952-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1952-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1952-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2996-1-0x0000000003270000-0x000000000330F000-memory.dmp

Filesize
636KB

Download
memory/2996-2-0x0000000003310000-0x000000000342B000-memory.dmp

Filesize
1.1MB

Download
memory/4452-23-0x00000000030B0000-0x0000000003143000-memory.dmp

Filesize
588KB

Download