djvu | 2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c

General

Target

2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe
Size

731KB
MD5

abba24cfeef402d2b9db9cea29dcf221
SHA1

afb51f68e598dabe9498ab188fe7e9f18cbdd55c
SHA256

2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c
SHA512

84f28ef097dafc383a0e684d4778c32ed283ad065b5dc738b476ce8347790dfcbacd122b027d86a9215fd8ba51f0d2bb19992d8cc6e394d0b911d4bcd94b1477
SSDEEP

12288:ZQtf7gatsRpXFfuKDCEKG39MPy7uE9sKxLT7nnNlJHZZKphu7h+i5ZhQ7ObVqqkj:ZQUTVfxe3mbuKb9T7nNlJHZZqh2pJW/P

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test2/get.php

Attributes

extension
.vehu
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: 0872PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral1/memory/2880-2-0x0000000002510000-0x000000000262B000-memory.dmp	family_djvu
behavioral1/memory/4664-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4664-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4664-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4664-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4664-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/6024-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/6024-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/6024-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/6024-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/6024-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/6024-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/6024-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/6024-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/6024-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/6024-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/6024-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

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

Checks computer location settings 2 TTPs 1 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-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1836	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-1-5-21-3906287020-2915474608-1755617787-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\5364d0db-1130-4001-a373-d43cbccc522d\\2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe\" --AutoStart"	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.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
21	api.2ip.ua
23	api.2ip.ua
33	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2880 set thread context of 4664	2880	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	87
PID 2132 set thread context of 6024	2132	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	96

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
4664	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe
4664	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe
6024	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe
6024	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2880 wrote to memory of 4664	2880	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	87
PID 2880 wrote to memory of 4664	2880	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	87
PID 2880 wrote to memory of 4664	2880	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	87
PID 2880 wrote to memory of 4664	2880	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	87
PID 2880 wrote to memory of 4664	2880	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	87
PID 2880 wrote to memory of 4664	2880	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	87
PID 2880 wrote to memory of 4664	2880	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	87
PID 2880 wrote to memory of 4664	2880	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	87
PID 2880 wrote to memory of 4664	2880	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	87
PID 2880 wrote to memory of 4664	2880	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	87
PID 4664 wrote to memory of 1836	4664	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	91
PID 4664 wrote to memory of 1836	4664	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	91
PID 4664 wrote to memory of 1836	4664	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	91
PID 4664 wrote to memory of 2132	4664	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	93
PID 4664 wrote to memory of 2132	4664	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	93
PID 4664 wrote to memory of 2132	4664	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	93
PID 2132 wrote to memory of 6024	2132	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	96
PID 2132 wrote to memory of 6024	2132	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	96
PID 2132 wrote to memory of 6024	2132	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	96
PID 2132 wrote to memory of 6024	2132	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	96
PID 2132 wrote to memory of 6024	2132	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	96
PID 2132 wrote to memory of 6024	2132	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	96
PID 2132 wrote to memory of 6024	2132	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	96
PID 2132 wrote to memory of 6024	2132	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	96
PID 2132 wrote to memory of 6024	2132	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	96
PID 2132 wrote to memory of 6024	2132	2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe	96

C:\Users\Admin\AppData\Local\Temp\2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe
"C:\Users\Admin\AppData\Local\Temp\2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2880
- C:\Users\Admin\AppData\Local\Temp\2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe
  "C:\Users\Admin\AppData\Local\Temp\2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4664
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\5364d0db-1130-4001-a373-d43cbccc522d" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1836
- - C:\Users\Admin\AppData\Local\Temp\2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe
    "C:\Users\Admin\AppData\Local\Temp\2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2132
  - - C:\Users\Admin\AppData\Local\Temp\2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe
      "C:\Users\Admin\AppData\Local\Temp\2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:6024

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
1KB

MD5
84721cd35068ddfc92aa0a4c829fbd2a

SHA1
71d7e227e0f3fcbb585598d0f3757a8935b748ce

SHA256
bf8250097eb58e963c7cd636093d2a332647af517ad22ddebe1765703b8dd199

SHA512
f08b89715c28ae36927316d6fca1716dbd9e935edf9d7e979586c4e4610fc29c83514e2385dbf43e7227f8275603c5cbd85c2a098be6ada95aee1a24c5e23dfc

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
724B

MD5
8202a1cd02e7d69597995cabbe881a12

SHA1
8858d9d934b7aa9330ee73de6c476acf19929ff6

SHA256
58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

SHA512
97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
410B

MD5
8fc561410a1e72b2ddd7d6727f623373

SHA1
11c7fb78cf49ee0503dbfbd94f961c6f69caa7a1

SHA256
ca9f4334e5cddba72732a02017cc6ff3a816062d00869a5fb56ba96d9ab54341

SHA512
74870db1d2279b949ced4b400c8084197156b43a050e842fb591ff91fdba21a5c924484f8a5749020f2a64e40e7d873cd68d8bac277c6305898f47abdaac8aa7

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
392B

MD5
8624bf177c2dde3693c1dd604d038d6f

SHA1
c48b83d620b996085f271aa756c0fe69b1d64163

SHA256
14dc41d48bfead2840ec42f333926f7e25b4ee9b45a8747b173f9f1e04b6ffb2

SHA512
f4d5c21512a5be2b6424df2803f493e8de465655e1e041dd5b88059bcc72665d76b5e8e84b2f05ebbb9d92fccff025075e6e8f1b0933e82a7b16d58d08512cc3

Download Submit
C:\Users\Admin\AppData\Local\5364d0db-1130-4001-a373-d43cbccc522d\2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c.exe

Filesize
731KB

MD5
abba24cfeef402d2b9db9cea29dcf221

SHA1
afb51f68e598dabe9498ab188fe7e9f18cbdd55c

SHA256
2445a7c47d7d05829be7ff80b30b7c9771314f1c6ea8178a57ec3ebb257d468c

SHA512
84f28ef097dafc383a0e684d4778c32ed283ad065b5dc738b476ce8347790dfcbacd122b027d86a9215fd8ba51f0d2bb19992d8cc6e394d0b911d4bcd94b1477

Download Submit
memory/2132-22-0x0000000000400000-0x000000000080E000-memory.dmp

Filesize
4.1MB

Download
memory/2132-23-0x0000000000400000-0x000000000080E000-memory.dmp

Filesize
4.1MB

Download
memory/2880-1-0x0000000002470000-0x0000000002508000-memory.dmp

Filesize
608KB

Download
memory/2880-2-0x0000000002510000-0x000000000262B000-memory.dmp

Filesize
1.1MB

Download
memory/4664-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4664-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4664-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4664-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4664-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/6024-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/6024-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/6024-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/6024-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/6024-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/6024-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/6024-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/6024-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/6024-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/6024-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/6024-40-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads