djvu | 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525

Analysis

max time kernel
298s
max time network
289s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
18/04/2024, 22:39

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General

Target
56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe
Size 819KB
Sample240418-2k3hcsgh52
SHA256 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525
MD5 b1e4c479c6bfc09e7af5e586b47a5215
SHA1 a5fed6e61786e5042ffcea44250078f0bab868c5
SHA512 f1a46d9d8e1485ea37d29ede20fc2c2c7a7765b27f69e8d366956ca5f675bf7f69d9e0e3f5fb2a2bdc72b16499323a8c3908e2416fc26d9b572fc1fa643227e2
SSDEEP 12288:uMW8zlkzKDV/gRojVmiNY1XsJroBL6JN5dwP7Pqc4vD9OsfdRr9f2h91kq:uMbYRojVmiSNy82srWOOxf2jmq
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/4220-2-0x0000000004A70000-0x0000000004B8B000-memory.dmp	family_djvu
behavioral2/memory/2456-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2456-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2456-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2456-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2456-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/196-20-0x00000000049C0000-0x0000000004A5E000-memory.dmp	family_djvu
behavioral2/memory/952-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/952-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/952-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/952-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/952-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/952-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/952-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/952-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/952-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/952-38-0x0000000000400000-0x0000000000537000-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
4052	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-1-5-21-1904658062-880901768-3903781817-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\5434ba88-9c7d-4890-b576-707e67234f30\\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe\" --AutoStart"	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.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
10	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4220 set thread context of 2456	4220	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	73
PID 196 set thread context of 952	196	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.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
2456	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe
2456	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe
952	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe
952	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4220 wrote to memory of 2456	4220	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	73
PID 4220 wrote to memory of 2456	4220	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	73
PID 4220 wrote to memory of 2456	4220	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	73
PID 4220 wrote to memory of 2456	4220	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	73
PID 4220 wrote to memory of 2456	4220	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	73
PID 4220 wrote to memory of 2456	4220	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	73
PID 4220 wrote to memory of 2456	4220	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	73
PID 4220 wrote to memory of 2456	4220	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	73
PID 4220 wrote to memory of 2456	4220	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	73
PID 4220 wrote to memory of 2456	4220	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	73
PID 2456 wrote to memory of 4052	2456	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	74
PID 2456 wrote to memory of 4052	2456	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	74
PID 2456 wrote to memory of 4052	2456	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	74
PID 2456 wrote to memory of 196	2456	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	75
PID 2456 wrote to memory of 196	2456	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	75
PID 2456 wrote to memory of 196	2456	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	75
PID 196 wrote to memory of 952	196	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	77
PID 196 wrote to memory of 952	196	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	77
PID 196 wrote to memory of 952	196	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	77
PID 196 wrote to memory of 952	196	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	77
PID 196 wrote to memory of 952	196	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	77
PID 196 wrote to memory of 952	196	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	77
PID 196 wrote to memory of 952	196	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	77
PID 196 wrote to memory of 952	196	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	77
PID 196 wrote to memory of 952	196	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	77
PID 196 wrote to memory of 952	196	56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe	77

C:\Users\Admin\AppData\Local\Temp\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe
"C:\Users\Admin\AppData\Local\Temp\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4220
- C:\Users\Admin\AppData\Local\Temp\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe
  "C:\Users\Admin\AppData\Local\Temp\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2456
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\5434ba88-9c7d-4890-b576-707e67234f30" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4052
- - C:\Users\Admin\AppData\Local\Temp\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe
    "C:\Users\Admin\AppData\Local\Temp\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:196
  - - C:\Users\Admin\AppData\Local\Temp\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe
      "C:\Users\Admin\AppData\Local\Temp\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:952

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 9e7216e6a933186a53c67090fe23f1849f1b3036897eddfed00313bef9370fb7
MD5 e4631530ca2d3fdd6a35f596669e54e7
SHA1 68d9ab4969b7609ee8a93fa2ae766c9781748d37
SHA512 dd58af9d8cb5e508e4d04872cb477f1cf9c04c68db87ccae04820fe351362296c5572b45ab416c08d41cb97374ceec3b0b0d28dfed750267622c5bf4dd79dad2
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 8d76065b5d1c55b50dbcb9bf41e4653a21db28381a48008bcc472068e4b575b2
MD5 76ac18a58448fb870719ae2379a61ee3
SHA1 6cd48ac9929105cd3261a59181968c479b0e4c54
SHA512 8daf846138aaebbfdf5b0c2a492d239b8ee0046c9e7088c794f5bd71641ee65ae994695e1e7ff6cd92aa23bae708763eb4dd2394d8410a85c621c7a61bba4c8b
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 0bb3b3193d0fca538c0d09a6ae8632e996be0bf6ca6de1ec6e96f9bb7efe9980
MD5 c6a135b993900ce20de054673fd45150
SHA1 4019f79286412c9793a815995e51e2281147d693
SHA512 99929913a95717a910abff7089d1242426fbcbae66669116f6db97b4db528861c34642ee42b5c16485f6dbf33cb8b1409f54f05d211dc2c6b6308ca6e5667078
MD5 SHA1 SHA512

Submit Download

56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe

Path C:\Users\Admin\AppData\Local\5434ba88-9c7d-4890-b576-707e67234f30\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe
Size 819KB
SHA256 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525
MD5 b1e4c479c6bfc09e7af5e586b47a5215
SHA1 a5fed6e61786e5042ffcea44250078f0bab868c5
SHA512 f1a46d9d8e1485ea37d29ede20fc2c2c7a7765b27f69e8d366956ca5f675bf7f69d9e0e3f5fb2a2bdc72b16499323a8c3908e2416fc26d9b572fc1fa643227e2
SSDEEP 12288:uMW8zlkzKDV/gRojVmiNY1XsJroBL6JN5dwP7Pqc4vD9OsfdRr9f2h91kq:uMbYRojVmiSNy82srWOOxf2jmq
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/196-20-0x00000000049C0000-0x0000000004A5E000-memory.dmp

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memory/952-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/952-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/952-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/952-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/952-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/952-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/952-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/952-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/952-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/952-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2456-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2456-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2456-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2456-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2456-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4220-2-0x0000000004A70000-0x0000000004B8B000-memory.dmp

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memory/4220-1-0x0000000002FF0000-0x000000000308C000-memory.dmp

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