djvu | d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58

Analysis

max time kernel
144s
max time network
124s
platform
windows11-21h2_x64
resource
win11-20240412-en
resource tags

arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
submitted
18/04/2024, 04:41

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General

Target
d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe
Size 769KB
Sample240418-fbcdxscf4v
SHA256 d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58
MD5 6459fe61bb80f410124323f87958e226
SHA1 1d6a695a3baf3cd60304796a0217dd59fc18dd3c
SHA512 3e84edd29bef7534ca399dd9e221330e961b3fa51eb18551a6993f430c34eca346a10cd5563b521f169ca6345b2d7092b47ae9752d9b0265fed41ec119b93e6c
SSDEEP 12288:E7j4h+DEdzqkBlubmTzQNHtgZKS79sgO86y8YnYatm6CaSJ:ph+DO4mXaHtFKO86yDYqC
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.uajs
offline_id
Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://sajdfue.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. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/df01994dd8d37c2c33469922f8e7155a20240402134014/fd95b0 Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. 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: 0859PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/3856-2-0x0000000004C20000-0x0000000004D3B000-memory.dmp	family_djvu
behavioral2/memory/1016-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1016-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1016-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1016-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1016-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2180-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2180-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2180-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2180-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2180-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2180-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2180-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2180-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2180-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2180-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2180-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

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

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4932	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-1-5-21-3777591257-2471171023-3629228286-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\ad762729-c4f3-47d4-9097-1d8ccd53f8e2\\d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe\" --AutoStart"	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.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
1	api.2ip.ua
2	api.2ip.ua
6	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3856 set thread context of 1016	3856	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	77
PID 2816 set thread context of 2180	2816	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	82

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1016	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe
1016	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe
2180	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe
2180	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3856 wrote to memory of 1016	3856	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	77
PID 3856 wrote to memory of 1016	3856	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	77
PID 3856 wrote to memory of 1016	3856	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	77
PID 3856 wrote to memory of 1016	3856	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	77
PID 3856 wrote to memory of 1016	3856	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	77
PID 3856 wrote to memory of 1016	3856	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	77
PID 3856 wrote to memory of 1016	3856	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	77
PID 3856 wrote to memory of 1016	3856	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	77
PID 3856 wrote to memory of 1016	3856	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	77
PID 3856 wrote to memory of 1016	3856	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	77
PID 1016 wrote to memory of 4932	1016	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	78
PID 1016 wrote to memory of 4932	1016	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	78
PID 1016 wrote to memory of 4932	1016	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	78
PID 1016 wrote to memory of 2816	1016	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	79
PID 1016 wrote to memory of 2816	1016	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	79
PID 1016 wrote to memory of 2816	1016	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	79
PID 2816 wrote to memory of 2180	2816	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	82
PID 2816 wrote to memory of 2180	2816	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	82
PID 2816 wrote to memory of 2180	2816	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	82
PID 2816 wrote to memory of 2180	2816	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	82
PID 2816 wrote to memory of 2180	2816	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	82
PID 2816 wrote to memory of 2180	2816	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	82
PID 2816 wrote to memory of 2180	2816	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	82
PID 2816 wrote to memory of 2180	2816	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	82
PID 2816 wrote to memory of 2180	2816	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	82
PID 2816 wrote to memory of 2180	2816	d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe	82

C:\Users\Admin\AppData\Local\Temp\d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe
"C:\Users\Admin\AppData\Local\Temp\d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3856
- C:\Users\Admin\AppData\Local\Temp\d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe
  "C:\Users\Admin\AppData\Local\Temp\d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1016
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\ad762729-c4f3-47d4-9097-1d8ccd53f8e2" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4932
- - C:\Users\Admin\AppData\Local\Temp\d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe
    "C:\Users\Admin\AppData\Local\Temp\d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2816
  - - C:\Users\Admin\AppData\Local\Temp\d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe
      "C:\Users\Admin\AppData\Local\Temp\d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2180

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 1KB
SHA256 85d459b9ae5c0393d8eafb1824fba9b8b8fcd83ec9de51c2dbd841c9c0df35cf
MD5 0828932bf74dba603211cebf4effd83a
SHA1 5154ebe32c15da3ab430893d51d005b517f29a36
SHA512 231f7a5a9e9836db5b190c42eed1bf61b31e133831688fabfdf488e3c605a9a1219b2e1fb0e10b897d2d82a60b8b223ddb77c51e94d98704c353c0098b905985
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 724B
SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
MD5 8202a1cd02e7d69597995cabbe881a12
SHA1 8858d9d934b7aa9330ee73de6c476acf19929ff6
SHA512 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
MD5 SHA1 SHA512

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24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 6bb2b30c26f36670cb0df8abba1f92612d876fdfaddbd8bb1fbbc710fa7d380f
MD5 6f2409789a2873c7805eb96dedf64c61
SHA1 864d86879dd8a76abe0bb27c35bd84a6b9b4bf4f
SHA512 19577cd50c7e603b92c854387839aa87081db9632521495204635ed588cc11182f66008bbda58a1eec3f5f6091b1aab1cfb7f13b8a6caff5d5325f814a7e7b8f
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 2a1b6a3e64d23dd42f07f51e766a9791e22b8526339c11632b9159417e216746
MD5 4527efed04bf8ba0430d8781e1d25a65
SHA1 5bcf4ddd1babfd4125755979effb49be04488824
SHA512 e270c0d84fcc8f3ffd9ea431759abdfd76ebf2e93979e1b56ae80adcde588ca6c5a0defe02408cbdf2037630682c5ab32a4778ac9301e09a0510227bc2d646b8
MD5 SHA1 SHA512

Submit Download

d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe

Path C:\Users\Admin\AppData\Local\ad762729-c4f3-47d4-9097-1d8ccd53f8e2\d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58.exe
Size 769KB
SHA256 d16898490cf1dd2143853a265bb48307e12e34fa6b0d6b707f2f979d141f7b58
MD5 6459fe61bb80f410124323f87958e226
SHA1 1d6a695a3baf3cd60304796a0217dd59fc18dd3c
SHA512 3e84edd29bef7534ca399dd9e221330e961b3fa51eb18551a6993f430c34eca346a10cd5563b521f169ca6345b2d7092b47ae9752d9b0265fed41ec119b93e6c
SSDEEP 12288:E7j4h+DEdzqkBlubmTzQNHtgZKS79sgO86y8YnYatm6CaSJ:ph+DO4mXaHtFKO86yDYqC
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1016-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1016-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1016-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1016-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1016-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2180-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2180-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2180-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2180-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2180-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2180-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2180-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2180-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2180-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2180-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2180-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2816-21-0x0000000002EA0000-0x0000000002F42000-memory.dmp

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memory/3856-2-0x0000000004C20000-0x0000000004D3B000-memory.dmp

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memory/3856-1-0x0000000002EC0000-0x0000000002F5A000-memory.dmp

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