djvu | 87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb

General

Target

87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe
Size

722KB
MD5

a974032594e06e98f660c03678a3c8a9
SHA1

ccf9348280c9dae0b5c1aa5f265b28af0bedebf8
SHA256

87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb
SHA512

1af56a3af3c2a01423c1659bdaed66fa7160bcc5fff3b0d6b0300e69195ea5d674ce21093eb40ae4cfb71ce43f8aa15005f3ad049ef8f95510f457d28400e1dc
SSDEEP

12288:Jka8O/CTG4TJ3XFJbJoP+1APoq98IatrZo3iycIIHFny2Ny3NuLCxyLPxjgdUZ4Q:JktTZHVom1APoq98dVoyyvcFQ3ULSsxD

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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/4560-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4560-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4560-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4952-4-0x00000000043B0000-0x00000000044CB000-memory.dmp	family_djvu
behavioral2/memory/4560-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4560-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/740-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/740-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/740-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/740-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/740-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/740-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/740-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/740-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/740-35-0x0000000000400000-0x0000000000537000-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
3860	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-1-5-21-2457560273-69882387-977367775-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\1e2a8b12-02c2-4f0b-ab71-be96c86359ff\\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe\" --AutoStart"	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.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
5	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4952 set thread context of 4560	4952	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	77
PID 5012 set thread context of 740	5012	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	82

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
4560	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe
4560	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe
740	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe
740	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4952 wrote to memory of 4560	4952	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	77
PID 4952 wrote to memory of 4560	4952	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	77
PID 4952 wrote to memory of 4560	4952	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	77
PID 4952 wrote to memory of 4560	4952	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	77
PID 4952 wrote to memory of 4560	4952	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	77
PID 4952 wrote to memory of 4560	4952	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	77
PID 4952 wrote to memory of 4560	4952	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	77
PID 4952 wrote to memory of 4560	4952	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	77
PID 4952 wrote to memory of 4560	4952	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	77
PID 4952 wrote to memory of 4560	4952	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	77
PID 4560 wrote to memory of 3860	4560	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	78
PID 4560 wrote to memory of 3860	4560	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	78
PID 4560 wrote to memory of 3860	4560	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	78
PID 4560 wrote to memory of 5012	4560	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	79
PID 4560 wrote to memory of 5012	4560	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	79
PID 4560 wrote to memory of 5012	4560	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	79
PID 5012 wrote to memory of 740	5012	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	82
PID 5012 wrote to memory of 740	5012	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	82
PID 5012 wrote to memory of 740	5012	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	82
PID 5012 wrote to memory of 740	5012	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	82
PID 5012 wrote to memory of 740	5012	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	82
PID 5012 wrote to memory of 740	5012	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	82
PID 5012 wrote to memory of 740	5012	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	82
PID 5012 wrote to memory of 740	5012	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	82
PID 5012 wrote to memory of 740	5012	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	82
PID 5012 wrote to memory of 740	5012	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	82

C:\Users\Admin\AppData\Local\Temp\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe
"C:\Users\Admin\AppData\Local\Temp\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4952
- C:\Users\Admin\AppData\Local\Temp\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe
  "C:\Users\Admin\AppData\Local\Temp\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4560
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\1e2a8b12-02c2-4f0b-ab71-be96c86359ff" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3860
- - C:\Users\Admin\AppData\Local\Temp\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe
    "C:\Users\Admin\AppData\Local\Temp\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:5012
  - - C:\Users\Admin\AppData\Local\Temp\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe
      "C:\Users\Admin\AppData\Local\Temp\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:740

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

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Downloads

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

Filesize
1KB

MD5
098e3fff2705346ece787c21ac03d0f3

SHA1
8f6923a4871978ebb148a5f1cd34530887b0f0e7

SHA256
16ed7a2c43f928bcc7ec8f7e93082abda7106a63b87e747dcca57f1cee05ccc9

SHA512
2977d9e735e742cdef931554063ce606e3ea9ef4bbf5f405bda639cca10444d0882bc5f48067e5b0e847af7ba069a2fbd97f386937fd3b19b5444d208d962e7e

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
ae65044d6170ecb9d299b57d3f0b29a1

SHA1
27735f134d50edb04246fad49099166620fe7b72

SHA256
6ad8c10d519a0251ace6f0ee1cc25b80b04e6436fa0371df3d4efbd481672bbf

SHA512
c66974147d53974efa4436576ea11200ec32cf903eac818bfd9020325ef8b9c223639d0547b6034176dc5ec71f72ab905058cd52be95530aa1d9964cf3a5d1ff

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

Filesize
392B

MD5
1fe42457183f1a57f83ec2dba6a82c9f

SHA1
e2247ecc5b987b0f63287f8a9a2e99a82f7edc19

SHA256
df09eb55832d012d59c986871045814260a563bff072190e0a4937cc290b0c9c

SHA512
cefb928e22ad07f36ccc285ac09847dc14910896cdd78a65544034bc97d9d44d8c4f471afbbf536b69ad7a2313072bdf6c656f11bf72ea43563db7c9b9bfc213

Download Submit
C:\Users\Admin\AppData\Local\1e2a8b12-02c2-4f0b-ab71-be96c86359ff\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe

Filesize
722KB

MD5
a974032594e06e98f660c03678a3c8a9

SHA1
ccf9348280c9dae0b5c1aa5f265b28af0bedebf8

SHA256
87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb

SHA512
1af56a3af3c2a01423c1659bdaed66fa7160bcc5fff3b0d6b0300e69195ea5d674ce21093eb40ae4cfb71ce43f8aa15005f3ad049ef8f95510f457d28400e1dc

Download Submit
memory/740-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/740-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/740-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/740-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/740-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/740-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/740-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/740-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/740-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4560-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4560-2-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4560-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4560-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4560-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4952-4-0x00000000043B0000-0x00000000044CB000-memory.dmp

Filesize
1.1MB

Download
memory/4952-1-0x0000000004300000-0x00000000043A1000-memory.dmp

Filesize
644KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads