djvu | fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7

Analysis

max time kernel
147s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
05/05/2024, 12:41

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe
Size 774KB
Sample240505-pwq79ade47
SHA256 fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7
MD5 7defb735c9a622bf9cbb57eff0373f65
SHA1 2c9a561a1c1ea894776571055e6fc82dea410a6a
SHA512 5b5e540f6e6ca62a1cdab347cd5de5b9e506d9956c01b15e605b50a278fa5db925d7d352092dd90a39f4cea23e6760a1e1e42a9855294dadaa10c1e9a5db6ab2
SSDEEP 12288:7LoSuacpFbddUz9Xc5j46rXQYvK2xPMxumhDgHlyhi5F5Nt:7LpTcpFnUzVcpXBvViuGkH6A
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.qehu
offline_id
jgILOjDrBgyzY4JmT3B2jDSyBmDPBruKk8bKs6t1
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/665ddae3fc3cd10bbaaa4350408b196920240504141005/4cae7e 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: 0868PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/3336-2-0x0000000004A20000-0x0000000004B3B000-memory.dmp	family_djvu
behavioral2/memory/4484-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4484-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4484-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4484-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4484-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1944-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1944-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1944-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1944-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1944-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1944-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1944-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1944-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1944-37-0x0000000000400000-0x0000000000537000-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
3096	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-1-5-21-293923083-2364846840-4256557006-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\2f72948a-ae27-48d0-a008-a91c2d8f4a7d\\fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe\" --AutoStart"	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.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 3336 set thread context of 4484	3336	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	81
PID 3012 set thread context of 1944	3012	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	86

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
4484	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe
4484	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe
1944	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe
1944	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3336 wrote to memory of 4484	3336	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	81
PID 3336 wrote to memory of 4484	3336	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	81
PID 3336 wrote to memory of 4484	3336	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	81
PID 3336 wrote to memory of 4484	3336	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	81
PID 3336 wrote to memory of 4484	3336	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	81
PID 3336 wrote to memory of 4484	3336	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	81
PID 3336 wrote to memory of 4484	3336	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	81
PID 3336 wrote to memory of 4484	3336	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	81
PID 3336 wrote to memory of 4484	3336	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	81
PID 3336 wrote to memory of 4484	3336	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	81
PID 4484 wrote to memory of 3096	4484	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	82
PID 4484 wrote to memory of 3096	4484	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	82
PID 4484 wrote to memory of 3096	4484	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	82
PID 4484 wrote to memory of 3012	4484	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	83
PID 4484 wrote to memory of 3012	4484	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	83
PID 4484 wrote to memory of 3012	4484	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	83
PID 3012 wrote to memory of 1944	3012	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	86
PID 3012 wrote to memory of 1944	3012	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	86
PID 3012 wrote to memory of 1944	3012	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	86
PID 3012 wrote to memory of 1944	3012	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	86
PID 3012 wrote to memory of 1944	3012	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	86
PID 3012 wrote to memory of 1944	3012	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	86
PID 3012 wrote to memory of 1944	3012	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	86
PID 3012 wrote to memory of 1944	3012	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	86
PID 3012 wrote to memory of 1944	3012	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	86
PID 3012 wrote to memory of 1944	3012	fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe	86

C:\Users\Admin\AppData\Local\Temp\fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe
"C:\Users\Admin\AppData\Local\Temp\fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3336
- C:\Users\Admin\AppData\Local\Temp\fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe
  "C:\Users\Admin\AppData\Local\Temp\fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4484
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\2f72948a-ae27-48d0-a008-a91c2d8f4a7d" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3096
- - C:\Users\Admin\AppData\Local\Temp\fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe
    "C:\Users\Admin\AppData\Local\Temp\fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3012
  - - C:\Users\Admin\AppData\Local\Temp\fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe
      "C:\Users\Admin\AppData\Local\Temp\fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1944

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

Loading Replay Monitor...

Downloads

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 1KB
SHA256 939a7f0780a999f6f67b3a64c5811946b1ee416d1b9cd4dba9d52f1d6ab787f9
MD5 ed89e34d7155c15ba34b2e8037f052fb
SHA1 45f90ed3c32a2e46361e9f5af26c61827dcceabd
SHA512 507c61186bc691e01fdbba126bfb6eb69d8e83027e83b50604992ebc4233d37f1e37737f264b3951486f660e0add1bfca75274808ed7bc87481ab6ce72e6c160
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 e68fdd3e26dfe54a0bc769045426c6a9ff049023dde0d96f23e59577d0986328
MD5 f7f824db3ccb9cf2ddf54cbf312c0643
SHA1 b91f499b7d64841f745316538b9b5b4277140e94
SHA512 e75145d5fece40febf5ddf2c4f05a377d4742c17ddfe408e6008de62aae7401281be916a2d6253d48b7604c4b205f5da0948f7055c6898e0718a0cf2b30b9614
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 f64c1c4efe8e4a0e3eb833a0ebe5d98842cb96141f306420552399ad27bcdba1
MD5 ab7c3e08966623d111252d263c8a1451
SHA1 337f34ddc9fa41f463af63a71b32ef2f28df88ae
SHA512 858c47a73f7791188b2b77c5e2f4bc4bdd6dc60ac1b0829c976d142e5007b954700c0f6488cd2283c17e16b2bba95ef23fdae317ff2b525b690ac09b1892e502
MD5 SHA1 SHA512

Submit Download

fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe

Path C:\Users\Admin\AppData\Local\2f72948a-ae27-48d0-a008-a91c2d8f4a7d\fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7.exe
Size 774KB
SHA256 fd43211b09447737fbe609f86df21ec83171ebb6bf693c71937476d95efe5ac7
MD5 7defb735c9a622bf9cbb57eff0373f65
SHA1 2c9a561a1c1ea894776571055e6fc82dea410a6a
SHA512 5b5e540f6e6ca62a1cdab347cd5de5b9e506d9956c01b15e605b50a278fa5db925d7d352092dd90a39f4cea23e6760a1e1e42a9855294dadaa10c1e9a5db6ab2
SSDEEP 12288:7LoSuacpFbddUz9Xc5j46rXQYvK2xPMxumhDgHlyhi5F5Nt:7LpTcpFnUzVcpXBvViuGkH6A
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1944-29-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1944-28-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1944-37-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1944-22-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1944-36-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1944-34-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1944-35-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1944-32-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1944-27-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/3336-1-0x00000000031E0000-0x0000000003276000-memory.dmp

Download

memory/3336-2-0x0000000004A20000-0x0000000004B3B000-memory.dmp

Download

memory/4484-6-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4484-4-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4484-3-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4484-5-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4484-19-0x0000000000400000-0x0000000000537000-memory.dmp

Download