djvu | ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178

General

Target

ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe
Size

717KB
MD5

d21913251f5e0e1c322c5f4b4d611369
SHA1

289365d4133b4062ea7340c7beaef8d804193230
SHA256

ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178
SHA512

c9f18280e1b86e78912a20929bc8b935ea87e0d75552b7a2972ed933591ec54984f8afb14200af4381bacbecfa4023b5a333fe5c0d0f9ad06031bd363b6df364
SSDEEP

12288:6fgsT63dJDCbXVJoPaKxVg8S0VmsdU2Vb7F+GDrVwECN5Vug61KP7E/G1VB1P:6fX+vSgaUVBmsO2p7oGDCECN5VugisIe

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 15 IoCs

resource	yara_rule
behavioral2/memory/1008-2-0x0000000004AC0000-0x0000000004BDB000-memory.dmp	family_djvu
behavioral2/memory/4512-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4512-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4512-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4512-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4512-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4148-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4148-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4148-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4148-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4148-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4148-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4148-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4148-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4148-37-0x0000000000400000-0x0000000000537000-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
3120	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-1-5-21-2551177587-3778486488-1329702901-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\55ce4471-3d33-4a09-b935-90ac7b1f716c\\ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe\" --AutoStart"	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.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
3	api.2ip.ua
7	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1008 set thread context of 4512	1008	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	79
PID 2528 set thread context of 4148	2528	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	85

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
4512	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe
4512	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe
4148	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe
4148	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1008 wrote to memory of 4512	1008	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	79
PID 1008 wrote to memory of 4512	1008	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	79
PID 1008 wrote to memory of 4512	1008	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	79
PID 1008 wrote to memory of 4512	1008	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	79
PID 1008 wrote to memory of 4512	1008	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	79
PID 1008 wrote to memory of 4512	1008	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	79
PID 1008 wrote to memory of 4512	1008	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	79
PID 1008 wrote to memory of 4512	1008	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	79
PID 1008 wrote to memory of 4512	1008	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	79
PID 1008 wrote to memory of 4512	1008	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	79
PID 4512 wrote to memory of 3120	4512	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	80
PID 4512 wrote to memory of 3120	4512	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	80
PID 4512 wrote to memory of 3120	4512	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	80
PID 4512 wrote to memory of 2528	4512	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	81
PID 4512 wrote to memory of 2528	4512	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	81
PID 4512 wrote to memory of 2528	4512	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	81
PID 2528 wrote to memory of 4148	2528	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	85
PID 2528 wrote to memory of 4148	2528	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	85
PID 2528 wrote to memory of 4148	2528	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	85
PID 2528 wrote to memory of 4148	2528	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	85
PID 2528 wrote to memory of 4148	2528	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	85
PID 2528 wrote to memory of 4148	2528	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	85
PID 2528 wrote to memory of 4148	2528	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	85
PID 2528 wrote to memory of 4148	2528	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	85
PID 2528 wrote to memory of 4148	2528	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	85
PID 2528 wrote to memory of 4148	2528	ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe	85

C:\Users\Admin\AppData\Local\Temp\ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe
"C:\Users\Admin\AppData\Local\Temp\ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1008
- C:\Users\Admin\AppData\Local\Temp\ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe
  "C:\Users\Admin\AppData\Local\Temp\ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4512
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\55ce4471-3d33-4a09-b935-90ac7b1f716c" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3120
- - C:\Users\Admin\AppData\Local\Temp\ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe
    "C:\Users\Admin\AppData\Local\Temp\ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2528
  - - C:\Users\Admin\AppData\Local\Temp\ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe
      "C:\Users\Admin\AppData\Local\Temp\ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4148

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

System Information Discovery

1

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
6180880554079cce45e90c0e2f0d1a12

SHA1
582754d9efea56d5bf20d19ee3ea1c89aacfd755

SHA256
f1a584dadcff1d0771907befea8175a3085541c8e0d2db8b52de97c02a2a1f6b

SHA512
796aea097d6c41989e8955d0ead10773a529af2cbc32d245b50979b3abbc08a32d559277b49bce16e04882fcb59f2c25910091521c9ba6aaa4c6b73bc5a52b03

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
ad949197b8e826b5c7f397f7b7f02698

SHA1
4cdf6bb3a1721a829b6e42aacad29b8448dfa74c

SHA256
353f0ae17fff9b397aac7ec0c883c66ef648da213a30372f859675a9845659af

SHA512
c31cc67565318b6f28ece4c1d4066d315bd14edc911eafdf85cff9c6e9b6d155836c48f1bf28bf6b2bc21ba91c11eea7b85d45ed53f2bbf75e628aa4b79caeca

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

Filesize
392B

MD5
d6ead8b59e88ad6524f5cf474068a258

SHA1
e8865b1a1f5417925f80030db950687e7a307253

SHA256
d78ab78848f3599cd88301d14835f3ea396322619bdc4b58f842067ca4db75f3

SHA512
7000089ae35a02a188fa66b2de7d7e2ac351920399410c2d490e0fc32a7537eb447f3d61823e40577d0c02a73e84186ead8e7d84ebcb6226e36bd884ca581f6b

Download Submit
C:\Users\Admin\AppData\Local\55ce4471-3d33-4a09-b935-90ac7b1f716c\ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178.exe

Filesize
717KB

MD5
d21913251f5e0e1c322c5f4b4d611369

SHA1
289365d4133b4062ea7340c7beaef8d804193230

SHA256
ab3b1568fe5714873a69ce4e5eeb15aacd9f41539e7fa34277bf5ba4c4b7b178

SHA512
c9f18280e1b86e78912a20929bc8b935ea87e0d75552b7a2972ed933591ec54984f8afb14200af4381bacbecfa4023b5a333fe5c0d0f9ad06031bd363b6df364

Download Submit
memory/1008-2-0x0000000004AC0000-0x0000000004BDB000-memory.dmp

Filesize
1.1MB

Download
memory/1008-1-0x0000000004A20000-0x0000000004ABA000-memory.dmp

Filesize
616KB

Download
memory/4148-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4148-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4148-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4148-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4148-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4148-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4148-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4148-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4148-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4512-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4512-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4512-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4512-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4512-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads