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
behavioral1/memory/764-2-0x00000000042A0000-0x00000000043BB000-memory.dmp	family_djvu
behavioral1/memory/1956-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1956-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1956-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1956-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1956-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2488-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2488-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2488-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2488-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2488-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2488-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2488-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2488-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2488-35-0x0000000000400000-0x0000000000537000-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-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3048	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-1-5-21-3558294865-3673844354-2255444939-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\bae1e07d-ec57-4eba-8261-ac0ec7dfaf65\\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
11	api.2ip.ua
12	api.2ip.ua
19	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 764 set thread context of 1956	764	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	83
PID 4916 set thread context of 2488	4916	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	91

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
1956	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe
1956	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe
2488	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe
2488	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 764 wrote to memory of 1956	764	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	83
PID 764 wrote to memory of 1956	764	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	83
PID 764 wrote to memory of 1956	764	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	83
PID 764 wrote to memory of 1956	764	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	83
PID 764 wrote to memory of 1956	764	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	83
PID 764 wrote to memory of 1956	764	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	83
PID 764 wrote to memory of 1956	764	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	83
PID 764 wrote to memory of 1956	764	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	83
PID 764 wrote to memory of 1956	764	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	83
PID 764 wrote to memory of 1956	764	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	83
PID 1956 wrote to memory of 3048	1956	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	85
PID 1956 wrote to memory of 3048	1956	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	85
PID 1956 wrote to memory of 3048	1956	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	85
PID 1956 wrote to memory of 4916	1956	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	86
PID 1956 wrote to memory of 4916	1956	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	86
PID 1956 wrote to memory of 4916	1956	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	86
PID 4916 wrote to memory of 2488	4916	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	91
PID 4916 wrote to memory of 2488	4916	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	91
PID 4916 wrote to memory of 2488	4916	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	91
PID 4916 wrote to memory of 2488	4916	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	91
PID 4916 wrote to memory of 2488	4916	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	91
PID 4916 wrote to memory of 2488	4916	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	91
PID 4916 wrote to memory of 2488	4916	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	91
PID 4916 wrote to memory of 2488	4916	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	91
PID 4916 wrote to memory of 2488	4916	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	91
PID 4916 wrote to memory of 2488	4916	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	91

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:764
- C:\Users\Admin\AppData\Local\Temp\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe
  "C:\Users\Admin\AppData\Local\Temp\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1956
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\bae1e07d-ec57-4eba-8261-ac0ec7dfaf65" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3048
- - 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:4916
  - - C:\Users\Admin\AppData\Local\Temp\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe
      "C:\Users\Admin\AppData\Local\Temp\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2488

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
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
38483c049c030892dd94cec46a66a32c

SHA1
a3c163fa2de7a3bcb384e5dfa119cf12b2579679

SHA256
50c09b859aa71927d4c7082d120f6abba5e358590a18b379d2a52e71d2165a4e

SHA512
38a337b6c91b69e90408f8253deb2d8b02d1841cf12d6500081619fec4dd646a55f475a9ae41fb0f1a8b2a77ebffa2a13bc7893730ef98d143395133ecd57f35

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

Filesize
392B

MD5
1a58c5a39dad1e776b2595d670d80ef1

SHA1
e20e8847b26a82e117adbbeebc62dc562b16b051

SHA256
f180990f6aa934fdafeaf8a1911d3873924f7fbcb83c1e65ba7ffd3746c03d05

SHA512
916cd799fa1be11bb56f36ea24355cdce65123400ccaafcf5111755a84deaf6f7316dfeda18ba54e3b8e6ce3fc7f6e3a3941912bb7e2ba2870406087885390fe

Download Submit
C:\Users\Admin\AppData\Local\bae1e07d-ec57-4eba-8261-ac0ec7dfaf65\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe

Filesize
722KB

MD5
a974032594e06e98f660c03678a3c8a9

SHA1
ccf9348280c9dae0b5c1aa5f265b28af0bedebf8

SHA256
87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb

SHA512
1af56a3af3c2a01423c1659bdaed66fa7160bcc5fff3b0d6b0300e69195ea5d674ce21093eb40ae4cfb71ce43f8aa15005f3ad049ef8f95510f457d28400e1dc

Download Submit
memory/764-2-0x00000000042A0000-0x00000000043BB000-memory.dmp

Filesize
1.1MB

Download
memory/764-1-0x0000000004200000-0x0000000004299000-memory.dmp

Filesize
612KB

Download
memory/1956-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1956-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1956-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1956-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1956-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2488-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2488-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2488-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2488-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2488-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2488-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2488-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2488-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2488-35-0x0000000000400000-0x0000000000537000-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