djvu | 41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925

Analysis

max time kernel
291s
max time network
244s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
23/05/2024, 23:19

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General

Target
41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
Size 738KB
Sample240523-3a5emsda7v
SHA256 41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925
MD5 05567327c48b4b2af47574295ee9748b
SHA1 7595f946efc74526f2b989413e73e3f37c4b4765
SHA512 293c0df46670b450a5a840a424ef1848a2dd8634a5e837b1ace4196ba76ba040dcb12a8a0397a4c1583af3d1b63227653999b64247f6b593ef5c1cf2ec33fdea
SSDEEP 12288:xIArWcHGmhaQSRJSYXYDNV+VA6Sy7ng50CgH969W6Cw:xo1JSrDNV7y7n1ldK
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.vepi
offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://cajgtus.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/33b490a613f49fa190924f199d2c079e20240512191214/caaf73 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: 0871PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral2/memory/5080-2-0x00000000040F0000-0x000000000420B000-memory.dmp	family_djvu
behavioral2/memory/1984-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1984-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1984-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1984-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1984-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4976-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4976-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4976-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4976-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4976-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4976-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4976-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4976-36-0x0000000000400000-0x0000000000537000-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
2532	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-1-5-21-873560699-1074803302-2326074425-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\ffc0ed31-a490-4962-8cf9-ae7fc26701dc\\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe\" --AutoStart"	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.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
11	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 5080 set thread context of 1984	5080	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	73
PID 4796 set thread context of 4976	4796	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	77

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
1984	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
1984	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
4976	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
4976	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 5080 wrote to memory of 1984	5080	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	73
PID 5080 wrote to memory of 1984	5080	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	73
PID 5080 wrote to memory of 1984	5080	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	73
PID 5080 wrote to memory of 1984	5080	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	73
PID 5080 wrote to memory of 1984	5080	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	73
PID 5080 wrote to memory of 1984	5080	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	73
PID 5080 wrote to memory of 1984	5080	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	73
PID 5080 wrote to memory of 1984	5080	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	73
PID 5080 wrote to memory of 1984	5080	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	73
PID 5080 wrote to memory of 1984	5080	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	73
PID 1984 wrote to memory of 2532	1984	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	74
PID 1984 wrote to memory of 2532	1984	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	74
PID 1984 wrote to memory of 2532	1984	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	74
PID 1984 wrote to memory of 4796	1984	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	75
PID 1984 wrote to memory of 4796	1984	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	75
PID 1984 wrote to memory of 4796	1984	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	75
PID 4796 wrote to memory of 4976	4796	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	77
PID 4796 wrote to memory of 4976	4796	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	77
PID 4796 wrote to memory of 4976	4796	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	77
PID 4796 wrote to memory of 4976	4796	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	77
PID 4796 wrote to memory of 4976	4796	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	77
PID 4796 wrote to memory of 4976	4796	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	77
PID 4796 wrote to memory of 4976	4796	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	77
PID 4796 wrote to memory of 4976	4796	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	77
PID 4796 wrote to memory of 4976	4796	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	77
PID 4796 wrote to memory of 4976	4796	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	77

C:\Users\Admin\AppData\Local\Temp\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
"C:\Users\Admin\AppData\Local\Temp\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5080
- C:\Users\Admin\AppData\Local\Temp\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
  "C:\Users\Admin\AppData\Local\Temp\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1984
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\ffc0ed31-a490-4962-8cf9-ae7fc26701dc" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2532
- - C:\Users\Admin\AppData\Local\Temp\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
    "C:\Users\Admin\AppData\Local\Temp\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4796
  - - C:\Users\Admin\AppData\Local\Temp\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
      "C:\Users\Admin\AppData\Local\Temp\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4976

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 564b4fa6970bf22294bceca2fb8f53087f3f5dec9565872d731cedd80aa9e7c3
MD5 6e66bd2d283b36991f7460262e5ff4ae
SHA1 eb6906c6d9350ef0b8ff2edd81c3e51649b4a916
SHA512 974fef50144e97b5bbae326f07ec863082693396e85dd42a0f85c86b6a3d0928b2da485cb7b3e541942d3c9bf49ce2f8063acf0ced79d6ed755928fdba453727
MD5 SHA1 SHA512

Submit Download

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 8161eaa2880081e6f89bec20960c460faf1388d16ef6b6e77bec4dc35d40b2a4
MD5 6db0ccec71fd72f8791b234a787ee299
SHA1 b71596f3fba90ce5b667335036bc2d962e482fe9
SHA512 8f6a89a6866cd6e2950a7e42badcb1a4e54cceb3dd2025c466c16dc7f548256bfc956358c47b1b1cf3eb6779f75a211e347a14ed301c2a6f393a8b9d8a69ee3f
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 49b976bf15cf047294bed92ff2640773fa8137998b3ba93669cbe9c69ca74d22
MD5 4a0d0a6878132fc3ea9337fdd1d3250f
SHA1 d8628f2b9e010750ac4127b1dce7eb1ba8ad79ce
SHA512 1ebbd19badc748c59b9b469f39dfab7431e8299994a698883484aa32256ec93aa4a901e551c5703ae7f932a9694179cef44e72d3aedcd7c94ff7e9277d11b409
MD5 SHA1 SHA512

Submit Download

41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe

Path C:\Users\Admin\AppData\Local\ffc0ed31-a490-4962-8cf9-ae7fc26701dc\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
Size 738KB
SHA256 41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925
MD5 05567327c48b4b2af47574295ee9748b
SHA1 7595f946efc74526f2b989413e73e3f37c4b4765
SHA512 293c0df46670b450a5a840a424ef1848a2dd8634a5e837b1ace4196ba76ba040dcb12a8a0397a4c1583af3d1b63227653999b64247f6b593ef5c1cf2ec33fdea
SSDEEP 12288:xIArWcHGmhaQSRJSYXYDNV+VA6Sy7ng50CgH969W6Cw:xo1JSrDNV7y7n1ldK
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1984-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1984-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1984-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1984-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1984-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4976-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4976-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4976-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4976-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4976-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4976-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4976-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4976-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5080-2-0x00000000040F0000-0x000000000420B000-memory.dmp

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memory/5080-1-0x00000000026B0000-0x0000000002744000-memory.dmp

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