djvu | 7912d5bd90e1c9427ef14e571589aab9017c823c16849976b6d2fc483fe34d10

Analysis

max time kernel
144s
max time network
122s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
15/01/2024, 10:50

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General

Target
5ce52f628bfa89f48f929961d04fa6c8.exe
Size 730KB
Sample240115-mxawjsfdd4
SHA256 7912d5bd90e1c9427ef14e571589aab9017c823c16849976b6d2fc483fe34d10
MD5 5ce52f628bfa89f48f929961d04fa6c8
SHA1 aa9c7a0e0721b6cc8a44ef28bd3b23328d8bcb7a
SHA512 a89eef90f56c652b7821d52b1695cf965cd56bf342f6747ac8bcc75a034f8a137e3ce6c37ed0a0e8ef76a7f26a8dfbab94ada5329836bd8c80a0a57873ab812c
SSDEEP 12288:ldZWyTp94ZIAbE8+zauKD/3P1X8pBSMSjNwsAkDz11YEixpFgqzprF/qDc8FKU1t:5WyTp+ZIAglzatD39X8DSLJ1KfFgqzVx
MD5 SHA1 SHA512 SSDEEP

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 14 IoCs

resource	yara_rule
behavioral1/memory/1200-2-0x00000000045B0000-0x00000000046CB000-memory.dmp	family_djvu
behavioral1/memory/2676-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2676-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2676-9-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2676-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2660-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2660-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2660-49-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2660-50-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2660-51-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2660-55-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2660-58-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2660-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2660-59-0x0000000000400000-0x0000000000537000-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
2972	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-1-5-21-452311807-3713411997-1028535425-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c5894b6b-31bc-4ec5-8c2a-cbbe9285969e\\5ce52f628bfa89f48f929961d04fa6c8.exe\" --AutoStart"	5ce52f628bfa89f48f929961d04fa6c8.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
3	api.2ip.ua
4	api.2ip.ua
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1200 set thread context of 2676	1200	5ce52f628bfa89f48f929961d04fa6c8.exe	28
PID 2880 set thread context of 2660	2880	5ce52f628bfa89f48f929961d04fa6c8.exe	31

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2676	5ce52f628bfa89f48f929961d04fa6c8.exe
2660	5ce52f628bfa89f48f929961d04fa6c8.exe
2660	5ce52f628bfa89f48f929961d04fa6c8.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1200 wrote to memory of 2676	1200	5ce52f628bfa89f48f929961d04fa6c8.exe	28
PID 1200 wrote to memory of 2676	1200	5ce52f628bfa89f48f929961d04fa6c8.exe	28
PID 1200 wrote to memory of 2676	1200	5ce52f628bfa89f48f929961d04fa6c8.exe	28
PID 1200 wrote to memory of 2676	1200	5ce52f628bfa89f48f929961d04fa6c8.exe	28
PID 1200 wrote to memory of 2676	1200	5ce52f628bfa89f48f929961d04fa6c8.exe	28
PID 1200 wrote to memory of 2676	1200	5ce52f628bfa89f48f929961d04fa6c8.exe	28
PID 1200 wrote to memory of 2676	1200	5ce52f628bfa89f48f929961d04fa6c8.exe	28
PID 1200 wrote to memory of 2676	1200	5ce52f628bfa89f48f929961d04fa6c8.exe	28
PID 1200 wrote to memory of 2676	1200	5ce52f628bfa89f48f929961d04fa6c8.exe	28
PID 1200 wrote to memory of 2676	1200	5ce52f628bfa89f48f929961d04fa6c8.exe	28
PID 1200 wrote to memory of 2676	1200	5ce52f628bfa89f48f929961d04fa6c8.exe	28
PID 2676 wrote to memory of 2972	2676	5ce52f628bfa89f48f929961d04fa6c8.exe	29
PID 2676 wrote to memory of 2972	2676	5ce52f628bfa89f48f929961d04fa6c8.exe	29
PID 2676 wrote to memory of 2972	2676	5ce52f628bfa89f48f929961d04fa6c8.exe	29
PID 2676 wrote to memory of 2972	2676	5ce52f628bfa89f48f929961d04fa6c8.exe	29
PID 2676 wrote to memory of 2880	2676	5ce52f628bfa89f48f929961d04fa6c8.exe	30
PID 2676 wrote to memory of 2880	2676	5ce52f628bfa89f48f929961d04fa6c8.exe	30
PID 2676 wrote to memory of 2880	2676	5ce52f628bfa89f48f929961d04fa6c8.exe	30
PID 2676 wrote to memory of 2880	2676	5ce52f628bfa89f48f929961d04fa6c8.exe	30
PID 2880 wrote to memory of 2660	2880	5ce52f628bfa89f48f929961d04fa6c8.exe	31
PID 2880 wrote to memory of 2660	2880	5ce52f628bfa89f48f929961d04fa6c8.exe	31
PID 2880 wrote to memory of 2660	2880	5ce52f628bfa89f48f929961d04fa6c8.exe	31
PID 2880 wrote to memory of 2660	2880	5ce52f628bfa89f48f929961d04fa6c8.exe	31
PID 2880 wrote to memory of 2660	2880	5ce52f628bfa89f48f929961d04fa6c8.exe	31
PID 2880 wrote to memory of 2660	2880	5ce52f628bfa89f48f929961d04fa6c8.exe	31
PID 2880 wrote to memory of 2660	2880	5ce52f628bfa89f48f929961d04fa6c8.exe	31
PID 2880 wrote to memory of 2660	2880	5ce52f628bfa89f48f929961d04fa6c8.exe	31
PID 2880 wrote to memory of 2660	2880	5ce52f628bfa89f48f929961d04fa6c8.exe	31
PID 2880 wrote to memory of 2660	2880	5ce52f628bfa89f48f929961d04fa6c8.exe	31
PID 2880 wrote to memory of 2660	2880	5ce52f628bfa89f48f929961d04fa6c8.exe	31

C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe
"C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1200
- C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe
  "C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2676
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\c5894b6b-31bc-4ec5-8c2a-cbbe9285969e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2972
- - C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe
    "C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2880
  - - C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe
      "C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2660

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 ee8aeed77dd9f1631fa75845214d75bfe04951a61892410ee369035e13fd14c6
MD5 b7470a9aa569b259d4c2bb3b80ae3aa3
SHA1 093290296b7f1e402ef96e4b33a88f064aa401eb
SHA512 4da3fc09260692f159c37b068664852931b712c8173de5e4b294799ac33ecf179055aaeb016fd0afad88cbfc50a571c4c88033dca56a573431af7462ea7979be
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

Submit Download

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 0db8d6bdd592d4b1fce3fe454e1bf33596408dcf31b0a3d201add22b5ef2b96e
MD5 d1622115f5a796a6c720b52a989f76e9
SHA1 810749d76c93ce8d53387c9efba28d888f952478
SHA512 8e5fe2b776d1b161c6cfffdda6cd5bf305be93698c2ea8b7e1b24b3008630f80b80053c41acab516974eca49f7f93e4116fb8c75d745f891bfb41197de28bf18
MD5 SHA1 SHA512

Submit Download

94308059B57B3142E455B38A6EB92015

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Size 344B
SHA256 34f126524ed7efe601693084bbd66c60bae18e114c70272ce918820ac2f909ed
MD5 4b499f67a343129c67c624d17da57982
SHA1 73db3745065aeda8fb3c5fbfb9491cfb3b206742
SHA512 3a05ba9d8e74753c8419aaff0e9d4c942e3d85c172ceb0864992d1da54ddf464ea6016a2a23cef86e53e22c3ffe589998aeb43755b8494c8d0e6da12bba21ea8
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 a13d4bde73db23d7dee8363683fb01a64dab9eeaa348c4f7159dbc2314d33d03
MD5 a4c3205e8f9686544632a3d681b0b437
SHA1 5b4172c19644e4d3f444e48cd8617ab9521df102
SHA512 1ebd6646830a591d256c3cb85d7600608f6c6639fd201b1ea828b85b0f1397024f269eaa037eb1e121949291cc410b30fe35aebd4dd83f0b1001f2cac732cb27
MD5 SHA1 SHA512

Submit Download

Cab88B0.tmp

Path C:\Users\Admin\AppData\Local\Temp\Cab88B0.tmp
Size 65KB
SHA256 c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
MD5 ac05d27423a85adc1622c714f2cb6184
SHA1 b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA512 6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d
SSDEEP 1536:drFvD2YSE/sFDqV0FJJynkAhftCvMd3coa282frgW1qgNzU:drVDJSeaDqV0FJwLhVkr282fF5U
MD5 SHA1 SHA512 SSDEEP

Submit Download

5ce52f628bfa89f48f929961d04fa6c8.exe

Path C:\Users\Admin\AppData\Local\c5894b6b-31bc-4ec5-8c2a-cbbe9285969e\5ce52f628bfa89f48f929961d04fa6c8.exe
Size 730KB
SHA256 7912d5bd90e1c9427ef14e571589aab9017c823c16849976b6d2fc483fe34d10
MD5 5ce52f628bfa89f48f929961d04fa6c8
SHA1 aa9c7a0e0721b6cc8a44ef28bd3b23328d8bcb7a
SHA512 a89eef90f56c652b7821d52b1695cf965cd56bf342f6747ac8bcc75a034f8a137e3ce6c37ed0a0e8ef76a7f26a8dfbab94ada5329836bd8c80a0a57873ab812c
SSDEEP 12288:ldZWyTp94ZIAbE8+zauKD/3P1X8pBSMSjNwsAkDz11YEixpFgqzprF/qDc8FKU1t:5WyTp+ZIAglzatD39X8DSLJ1KfFgqzVx
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1200-0-0x00000000002D0000-0x0000000000362000-memory.dmp

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memory/1200-1-0x00000000002D0000-0x0000000000362000-memory.dmp

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memory/1200-2-0x00000000045B0000-0x00000000046CB000-memory.dmp

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memory/1200-7-0x00000000002D0000-0x0000000000362000-memory.dmp

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memory/2660-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2660-49-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2660-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2660-59-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2660-57-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2660-58-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2660-55-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2660-51-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2660-50-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2676-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2676-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/2676-8-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2676-9-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2676-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2880-31-0x0000000000250000-0x00000000002E2000-memory.dmp

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memory/2880-28-0x0000000000250000-0x00000000002E2000-memory.dmp

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