djvu | 0e06e9585cc9db33ee999ca4de668ab64ef6e9fa928ae6541b2f1ec68ff09da8

Analysis

max time kernel
130s
max time network
135s
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, 22:23

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General

Target
4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe
Size 787KB
Sample240927-2axjcssfmj
SHA256 4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7
MD5 0b862b9c889d4bdc6f0bac7d702d8753
SHA1 fdc030df123e6e6a712cbc960a2e7c63266bf040
SHA512 4f7284a625b4909f9a0d80023c1dbfe3ed2de8a14fdf9a5bd3687d7e2fb21e265ee6cca613e4e6c8cab35f806501b155e6ed70a11530eb1cc78dbc38b22d3e8b
SSDEEP 24576:reKt4RjnJ+wWEr55fRue+cfxiskJM0BPA:rORdGA55fkcJinM0BI
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://astdg.top/nddddhsspen6/get.php

Attributes

extension
.moqs
offline_id
CatwRkqdYh2Jomn6DqwFoGgcSbDsle1xlE1NPtt1
payload_url
http://securebiz.org/dl/build2.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-N3p42CffoV 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: 0318ewgfDd

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral18/memory/4020-2-0x00000000027B0000-0x00000000028CB000-memory.dmp	family_djvu
behavioral18/memory/1916-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral18/memory/1916-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral18/memory/1916-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral18/memory/1916-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral18/memory/1916-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral18/memory/4808-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral18/memory/4808-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral18/memory/4808-22-0x0000000000400000-0x0000000000537000-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-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
936	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-1-5-21-2170637797-568393320-3232933035-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\4153527d-0c0e-49e2-9fec-67a4e97dbf24\\4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe\" --AutoStart"	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.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
13	api.2ip.ua
16	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4020 set thread context of 1916	4020	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	89
PID 1908 set thread context of 4808	1908	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	93

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
648	4808	WerFault.exe	93

System Location Discovery: System Language Discovery 1 TTPs 5 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	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1916	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe
1916	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4020 wrote to memory of 1916	4020	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	89
PID 4020 wrote to memory of 1916	4020	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	89
PID 4020 wrote to memory of 1916	4020	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	89
PID 4020 wrote to memory of 1916	4020	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	89
PID 4020 wrote to memory of 1916	4020	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	89
PID 4020 wrote to memory of 1916	4020	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	89
PID 4020 wrote to memory of 1916	4020	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	89
PID 4020 wrote to memory of 1916	4020	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	89
PID 4020 wrote to memory of 1916	4020	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	89
PID 4020 wrote to memory of 1916	4020	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	89
PID 1916 wrote to memory of 936	1916	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	90
PID 1916 wrote to memory of 936	1916	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	90
PID 1916 wrote to memory of 936	1916	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	90
PID 1916 wrote to memory of 1908	1916	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	91
PID 1916 wrote to memory of 1908	1916	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	91
PID 1916 wrote to memory of 1908	1916	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	91
PID 1908 wrote to memory of 4808	1908	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	93
PID 1908 wrote to memory of 4808	1908	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	93
PID 1908 wrote to memory of 4808	1908	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	93
PID 1908 wrote to memory of 4808	1908	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	93
PID 1908 wrote to memory of 4808	1908	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	93
PID 1908 wrote to memory of 4808	1908	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	93
PID 1908 wrote to memory of 4808	1908	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	93
PID 1908 wrote to memory of 4808	1908	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	93
PID 1908 wrote to memory of 4808	1908	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	93
PID 1908 wrote to memory of 4808	1908	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	93

C:\Users\Admin\AppData\Local\Temp\4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe
"C:\Users\Admin\AppData\Local\Temp\4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4020
- C:\Users\Admin\AppData\Local\Temp\4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe
  "C:\Users\Admin\AppData\Local\Temp\4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1916
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\4153527d-0c0e-49e2-9fec-67a4e97dbf24" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:936
- - C:\Users\Admin\AppData\Local\Temp\4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe
    "C:\Users\Admin\AppData\Local\Temp\4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1908
  - - C:\Users\Admin\AppData\Local\Temp\4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe
      "C:\Users\Admin\AppData\Local\Temp\4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      PID:4808
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4808 -s 568
        5⤵
        Program crash
        
        PID:648

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4808 -ip 4808
1⤵
PID:4692

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4336,i,16316361669272684588,6171287487746154806,262144 --variations-seed-version --mojo-platform-channel-handle=4328 /prefetch:8
1⤵
PID:1840

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe

Path C:\Users\Admin\AppData\Local\4153527d-0c0e-49e2-9fec-67a4e97dbf24\4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe
Size 787KB
SHA256 4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7
MD5 0b862b9c889d4bdc6f0bac7d702d8753
SHA1 fdc030df123e6e6a712cbc960a2e7c63266bf040
SHA512 4f7284a625b4909f9a0d80023c1dbfe3ed2de8a14fdf9a5bd3687d7e2fb21e265ee6cca613e4e6c8cab35f806501b155e6ed70a11530eb1cc78dbc38b22d3e8b
SSDEEP 24576:reKt4RjnJ+wWEr55fRue+cfxiskJM0BPA:rORdGA55fkcJinM0BI
MD5 SHA1 SHA512 SSDEEP

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memory/1908-27-0x0000000000400000-0x000000000092E000-memory.dmp

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memory/1908-23-0x0000000000400000-0x000000000092E000-memory.dmp

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memory/1916-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1916-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1916-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1916-20-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1916-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4020-1-0x00000000026F0000-0x0000000002784000-memory.dmp

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memory/4020-2-0x00000000027B0000-0x00000000028CB000-memory.dmp

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memory/4808-26-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4808-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4808-22-0x0000000000400000-0x0000000000537000-memory.dmp

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