djvu | 43f822b1220756e8484429635c2de1d11565e1c1de484c735dde760b06033867

Analysis

max time kernel
148s
max time network
161s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
03/12/2022, 11:41

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General

Target
6f9bdd58f6e5339a90ae7c38a963ce4c.exe
Size 730KB
Sample221203-ntewrsbb9t
SHA256 43f822b1220756e8484429635c2de1d11565e1c1de484c735dde760b06033867
MD5 6f9bdd58f6e5339a90ae7c38a963ce4c
SHA1 199064011605cd86388f66865404a7da4d384fa7
SHA512 c8b02a8baa126f984a36d5ee62b6ed24fc9d8e5ba1162c11b8aaa55b9f011968843abfaf6b857046c9d4360d747d77bec1c59795d06132c892fd8c0467113a60
SSDEEP 12288:6gnDX4H5bVSKW4hfNRE2/l7wH0SgiHzHpzGf6O1FujvQB1SfDLoy0uqwF/WB:6AW5bVSKW4hfNpd0GiTpM9FMPoPIA
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu vidar 517 discovery persistence ransomware stealer

Malware Config

Extracted

Family

djvu

http://fresherlights.com/test1/get.php

Attributes

extension
.bowd
offline_id
oHp5e4SJxdFtxfvKYmeX06F4C5cn0EcsF5Ak9Wt1
payload_url
http://uaery.top/dl/build2.exe

http://fresherlights.com/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-dyi5UcwIT9 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: 0594Jhyjd

rsa_pubkey.plain

Extracted

Family

vidar

Version

Botnet

https://t.me/asifrazatg
https://steamcommunity.com/profiles/76561199439929669

Attributes

profile_id
517

Signatures

Detected Djvu ransomware 10 IoCs

resource	yara_rule
behavioral2/memory/3276-133-0x00000000023D0000-0x00000000024EB000-memory.dmp	family_djvu
behavioral2/memory/3796-135-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3796-136-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3796-137-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3796-138-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3796-142-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4340-146-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4340-147-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4340-149-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4340-150-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Downloads MZ/PE file

Executes dropped EXE 3 IoCs

pid	Process
2360	build2.exe
2660	build3.exe
1292	build2.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	6f9bdd58f6e5339a90ae7c38a963ce4c.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	6f9bdd58f6e5339a90ae7c38a963ce4c.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4180	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\984faa21-e4f1-4597-b625-c628e5e1477a\\6f9bdd58f6e5339a90ae7c38a963ce4c.exe\" --AutoStart"	6f9bdd58f6e5339a90ae7c38a963ce4c.exe

Looks up external IP address via web service 3 IoCs

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

flow	ioc
98	api.2ip.ua
99	api.2ip.ua
43	api.2ip.ua

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3276 set thread context of 3796	3276	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	83
PID 1192 set thread context of 4340	1192	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	97
PID 2360 set thread context of 1292	2360	build2.exe	103

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
3388	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3796	6f9bdd58f6e5339a90ae7c38a963ce4c.exe
3796	6f9bdd58f6e5339a90ae7c38a963ce4c.exe
4340	6f9bdd58f6e5339a90ae7c38a963ce4c.exe
4340	6f9bdd58f6e5339a90ae7c38a963ce4c.exe

Suspicious use of WriteProcessMemory 44 IoCs

description	pid	Process	procid_target
PID 3276 wrote to memory of 3796	3276	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	83
PID 3276 wrote to memory of 3796	3276	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	83
PID 3276 wrote to memory of 3796	3276	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	83
PID 3276 wrote to memory of 3796	3276	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	83
PID 3276 wrote to memory of 3796	3276	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	83
PID 3276 wrote to memory of 3796	3276	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	83
PID 3276 wrote to memory of 3796	3276	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	83
PID 3276 wrote to memory of 3796	3276	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	83
PID 3276 wrote to memory of 3796	3276	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	83
PID 3276 wrote to memory of 3796	3276	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	83
PID 3796 wrote to memory of 4180	3796	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	92
PID 3796 wrote to memory of 4180	3796	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	92
PID 3796 wrote to memory of 4180	3796	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	92
PID 3796 wrote to memory of 1192	3796	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	95
PID 3796 wrote to memory of 1192	3796	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	95
PID 3796 wrote to memory of 1192	3796	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	95
PID 1192 wrote to memory of 4340	1192	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	97
PID 1192 wrote to memory of 4340	1192	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	97
PID 1192 wrote to memory of 4340	1192	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	97
PID 1192 wrote to memory of 4340	1192	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	97
PID 1192 wrote to memory of 4340	1192	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	97
PID 1192 wrote to memory of 4340	1192	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	97
PID 1192 wrote to memory of 4340	1192	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	97
PID 1192 wrote to memory of 4340	1192	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	97
PID 1192 wrote to memory of 4340	1192	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	97
PID 1192 wrote to memory of 4340	1192	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	97
PID 4340 wrote to memory of 2360	4340	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	99
PID 4340 wrote to memory of 2360	4340	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	99
PID 4340 wrote to memory of 2360	4340	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	99
PID 4340 wrote to memory of 2660	4340	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	102
PID 4340 wrote to memory of 2660	4340	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	102
PID 4340 wrote to memory of 2660	4340	6f9bdd58f6e5339a90ae7c38a963ce4c.exe	102
PID 2360 wrote to memory of 1292	2360	build2.exe	103
PID 2360 wrote to memory of 1292	2360	build2.exe	103
PID 2360 wrote to memory of 1292	2360	build2.exe	103
PID 2360 wrote to memory of 1292	2360	build2.exe	103
PID 2360 wrote to memory of 1292	2360	build2.exe	103
PID 2360 wrote to memory of 1292	2360	build2.exe	103
PID 2360 wrote to memory of 1292	2360	build2.exe	103
PID 2360 wrote to memory of 1292	2360	build2.exe	103
PID 2360 wrote to memory of 1292	2360	build2.exe	103
PID 2660 wrote to memory of 3388	2660	build3.exe	105
PID 2660 wrote to memory of 3388	2660	build3.exe	105
PID 2660 wrote to memory of 3388	2660	build3.exe	105

C:\Users\Admin\AppData\Local\Temp\6f9bdd58f6e5339a90ae7c38a963ce4c.exe
"C:\Users\Admin\AppData\Local\Temp\6f9bdd58f6e5339a90ae7c38a963ce4c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3276
- C:\Users\Admin\AppData\Local\Temp\6f9bdd58f6e5339a90ae7c38a963ce4c.exe
  "C:\Users\Admin\AppData\Local\Temp\6f9bdd58f6e5339a90ae7c38a963ce4c.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3796
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\984faa21-e4f1-4597-b625-c628e5e1477a" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4180
- - C:\Users\Admin\AppData\Local\Temp\6f9bdd58f6e5339a90ae7c38a963ce4c.exe
    "C:\Users\Admin\AppData\Local\Temp\6f9bdd58f6e5339a90ae7c38a963ce4c.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1192
  - - C:\Users\Admin\AppData\Local\Temp\6f9bdd58f6e5339a90ae7c38a963ce4c.exe
      "C:\Users\Admin\AppData\Local\Temp\6f9bdd58f6e5339a90ae7c38a963ce4c.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Checks computer location settings
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of WriteProcessMemory
      PID:4340
    - - C:\Users\Admin\AppData\Local\a4084ce2-575c-45f8-9a0c-c8396644b69d\build2.exe
        
        "C:\Users\Admin\AppData\Local\a4084ce2-575c-45f8-9a0c-c8396644b69d\build2.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of WriteProcessMemory
        
        PID:2360
      - C:\Users\Admin\AppData\Local\a4084ce2-575c-45f8-9a0c-c8396644b69d\build2.exe
        
        "C:\Users\Admin\AppData\Local\a4084ce2-575c-45f8-9a0c-c8396644b69d\build2.exe"
        6⤵
        Executes dropped EXE
        
        PID:1292
    - - C:\Users\Admin\AppData\Local\a4084ce2-575c-45f8-9a0c-c8396644b69d\build3.exe
        
        "C:\Users\Admin\AppData\Local\a4084ce2-575c-45f8-9a0c-c8396644b69d\build3.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of WriteProcessMemory
        
        PID:2660
      - C:\Windows\SysWOW64\schtasks.exe
        
        /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
        6⤵
        Creates scheduled task(s)
        
        PID:3388

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

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

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Downloads

6f9bdd58f6e5339a90ae7c38a963ce4c.exe

Path C:\Users\Admin\AppData\Local\984faa21-e4f1-4597-b625-c628e5e1477a\6f9bdd58f6e5339a90ae7c38a963ce4c.exe
Size 730KB
SHA256 43f822b1220756e8484429635c2de1d11565e1c1de484c735dde760b06033867
MD5 6f9bdd58f6e5339a90ae7c38a963ce4c
SHA1 199064011605cd86388f66865404a7da4d384fa7
SHA512 c8b02a8baa126f984a36d5ee62b6ed24fc9d8e5ba1162c11b8aaa55b9f011968843abfaf6b857046c9d4360d747d77bec1c59795d06132c892fd8c0467113a60
SSDEEP 12288:6gnDX4H5bVSKW4hfNRE2/l7wH0SgiHzHpzGf6O1FujvQB1SfDLoy0uqwF/WB:6AW5bVSKW4hfNpd0GiTpM9FMPoPIA
MD5 SHA1 SHA512 SSDEEP

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build2.exe

Path C:\Users\Admin\AppData\Local\a4084ce2-575c-45f8-9a0c-c8396644b69d\build2.exe
Size 258KB
SHA256 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f
MD5 b9212ded69fae1fa1fb5d6db46a9fb76
SHA1 58face4245646b1cd379ee49f03a701eab1642be
SHA512 09cab8ccedb9e53d6d2725e8b9dbbe8fa9552607a58d89876b6539a6612b2e7ac0440ef281971bec9191510915fa6264048510add493e6a862b0d3b4f006e342
SSDEEP 6144:YdAhH6pftFbsb8XODU4aLTwzLs0+mKnBtt:VUpftVcwIU4aLTwz5tItt
MD5 SHA1 SHA512 SSDEEP

Submit Download

build2.exe

Path C:\Users\Admin\AppData\Local\a4084ce2-575c-45f8-9a0c-c8396644b69d\build2.exe
Size 258KB
SHA256 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f
MD5 b9212ded69fae1fa1fb5d6db46a9fb76
SHA1 58face4245646b1cd379ee49f03a701eab1642be
SHA512 09cab8ccedb9e53d6d2725e8b9dbbe8fa9552607a58d89876b6539a6612b2e7ac0440ef281971bec9191510915fa6264048510add493e6a862b0d3b4f006e342
SSDEEP 6144:YdAhH6pftFbsb8XODU4aLTwzLs0+mKnBtt:VUpftVcwIU4aLTwz5tItt
MD5 SHA1 SHA512 SSDEEP

Submit Download

build2.exe

Path C:\Users\Admin\AppData\Local\a4084ce2-575c-45f8-9a0c-c8396644b69d\build2.exe
Size 258KB
SHA256 7a087c1bcd038c61ddb0f634f9b21e6db9bed59842f19adeda48b49acb20e16f
MD5 b9212ded69fae1fa1fb5d6db46a9fb76
SHA1 58face4245646b1cd379ee49f03a701eab1642be
SHA512 09cab8ccedb9e53d6d2725e8b9dbbe8fa9552607a58d89876b6539a6612b2e7ac0440ef281971bec9191510915fa6264048510add493e6a862b0d3b4f006e342
SSDEEP 6144:YdAhH6pftFbsb8XODU4aLTwzLs0+mKnBtt:VUpftVcwIU4aLTwz5tItt
MD5 SHA1 SHA512 SSDEEP

Submit Download

build3.exe

Path C:\Users\Admin\AppData\Local\a4084ce2-575c-45f8-9a0c-c8396644b69d\build3.exe
Size 9KB
SHA256 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
MD5 9ead10c08e72ae41921191f8db39bc16
SHA1 abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA512 aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
SSDEEP 192:9UEc8b6H1LE+4LoGgMatAJ2lzUw317NyEpvNHhqyo:9UUE1BYoGza/D3170kiyo
MD5 SHA1 SHA512 SSDEEP

Submit Download

build3.exe

Path C:\Users\Admin\AppData\Local\a4084ce2-575c-45f8-9a0c-c8396644b69d\build3.exe
Size 9KB
SHA256 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
MD5 9ead10c08e72ae41921191f8db39bc16
SHA1 abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA512 aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
SSDEEP 192:9UEc8b6H1LE+4LoGgMatAJ2lzUw317NyEpvNHhqyo:9UUE1BYoGza/D3170kiyo
MD5 SHA1 SHA512 SSDEEP

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memory/1192-145-0x0000000002219000-0x00000000022AB000-memory.dmp

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memory/1292-162-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/1292-160-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/1292-164-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/1292-165-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/1292-167-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/2360-158-0x00000000005E0000-0x000000000062B000-memory.dmp

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memory/2360-157-0x00000000006ED000-0x000000000071A000-memory.dmp

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memory/2360-163-0x00000000006ED000-0x000000000071A000-memory.dmp

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memory/3276-132-0x000000000230E000-0x00000000023A0000-memory.dmp

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memory/3276-133-0x00000000023D0000-0x00000000024EB000-memory.dmp

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memory/3796-138-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3796-142-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3796-137-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3796-136-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3796-135-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4340-149-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4340-146-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4340-150-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4340-147-0x0000000000400000-0x0000000000537000-memory.dmp

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