djvu | 8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc

General

Target

8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe
Size

724KB
MD5

bdf14233ab9b6bfa63c4e9412052a3be
SHA1

c137fcf860efb302decdda821c9f8bb3fa53b875
SHA256

8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc
SHA512

7532ce92e58b45eb2f9e08076d6b8cc052b752d314bc5753bb182beb6d5adcc45727b8a4d60c3988ce19fa09499e5c06de339cb6f6cb14744f5baab678473e45
SSDEEP

12288:Ihadw71QNEATh9OHDuFNXRljaUJZCjLXApjeAeoM74z4FAWJdcdTclaYmwMLZBm:slyNE+hOuFN/jzJZCjLXEeZIYDgcng

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test1/get.php

Attributes

extension
.vepi
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: 0871PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral1/memory/4364-2-0x00000000021D0000-0x00000000022EB000-memory.dmp	family_djvu
behavioral1/memory/2232-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2232-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2232-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2232-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2232-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3708-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3708-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3708-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3708-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3708-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3708-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3708-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3708-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3708-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3708-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3708-39-0x0000000000400000-0x0000000000537000-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-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3032	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-1-5-21-1162180587-977231257-2194346871-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\1fe57ada-2821-4bb5-9c76-89e983d3e74d\\8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe\" --AutoStart"	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.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
31	api.2ip.ua
7	api.2ip.ua
11	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4364 set thread context of 2232	4364	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	86
PID 388 set thread context of 3708	388	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	92

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
2232	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe
2232	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe
3708	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe
3708	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4364 wrote to memory of 2232	4364	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	86
PID 4364 wrote to memory of 2232	4364	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	86
PID 4364 wrote to memory of 2232	4364	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	86
PID 4364 wrote to memory of 2232	4364	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	86
PID 4364 wrote to memory of 2232	4364	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	86
PID 4364 wrote to memory of 2232	4364	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	86
PID 4364 wrote to memory of 2232	4364	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	86
PID 4364 wrote to memory of 2232	4364	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	86
PID 4364 wrote to memory of 2232	4364	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	86
PID 4364 wrote to memory of 2232	4364	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	86
PID 2232 wrote to memory of 3032	2232	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	89
PID 2232 wrote to memory of 3032	2232	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	89
PID 2232 wrote to memory of 3032	2232	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	89
PID 2232 wrote to memory of 388	2232	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	90
PID 2232 wrote to memory of 388	2232	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	90
PID 2232 wrote to memory of 388	2232	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	90
PID 388 wrote to memory of 3708	388	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	92
PID 388 wrote to memory of 3708	388	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	92
PID 388 wrote to memory of 3708	388	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	92
PID 388 wrote to memory of 3708	388	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	92
PID 388 wrote to memory of 3708	388	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	92
PID 388 wrote to memory of 3708	388	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	92
PID 388 wrote to memory of 3708	388	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	92
PID 388 wrote to memory of 3708	388	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	92
PID 388 wrote to memory of 3708	388	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	92
PID 388 wrote to memory of 3708	388	8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe	92

C:\Users\Admin\AppData\Local\Temp\8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe
"C:\Users\Admin\AppData\Local\Temp\8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4364
- C:\Users\Admin\AppData\Local\Temp\8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe
  "C:\Users\Admin\AppData\Local\Temp\8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2232
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\1fe57ada-2821-4bb5-9c76-89e983d3e74d" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3032
- - C:\Users\Admin\AppData\Local\Temp\8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe
    "C:\Users\Admin\AppData\Local\Temp\8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:388
  - - C:\Users\Admin\AppData\Local\Temp\8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe
      "C:\Users\Admin\AppData\Local\Temp\8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:3708

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

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Downloads

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

Filesize
1KB

MD5
c1e2466af0597e2672f29af175d12c3b

SHA1
cc3fd4589a74806a25279f8bfa269d2f18ef1931

SHA256
6b347ffe3fb9f4b08f264f926cfec815402bdfc1762488d1afe47c824a313da5

SHA512
4315539a83b9222dc12498bee6e1caff3a1bbd90fa029f30e1193798d077fadd608886ef390f37a860f629f61777f8e1835506c038fae7610fe076a3d836899b

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
692c83cea36b88aaa6a1f8f23517f7b9

SHA1
22456fc4512e0cd351c666ee878934902d5d280e

SHA256
fe93ec533555c806c5c25a58b5d80fc71f20025504ac10695aaeefa2c2afe40d

SHA512
e9f1eb21992f19ba64a1c84b4d52e55269084043db837b4d7b36126b3e833bd7bde03ac47a3f9b78ca959df77936c372b5904a86d6342a3812d35f7ef12e96a8

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

Filesize
392B

MD5
2c050ba8c1158cf135778b9447a24487

SHA1
a68582beb2fbae1ef6ff954667bcf76407225f98

SHA256
a4a49e7e12a87bcd500419e0403b96bf77c168016d154db8ad660108a0118685

SHA512
84c0cf6029378b64c4895d208d55e5278c6f919034637a45580dd14b6934cb6984c28c8bc82b0f6237ff1c400254ca20a93aada6e33262fb2cc73a7ca7a2f474

Download Submit
C:\Users\Admin\AppData\Local\1fe57ada-2821-4bb5-9c76-89e983d3e74d\8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc.exe

Filesize
724KB

MD5
bdf14233ab9b6bfa63c4e9412052a3be

SHA1
c137fcf860efb302decdda821c9f8bb3fa53b875

SHA256
8fa12f4661baeb6b95bbfe71670ece0a4e96ef6757722ef90877a90ace0817bc

SHA512
7532ce92e58b45eb2f9e08076d6b8cc052b752d314bc5753bb182beb6d5adcc45727b8a4d60c3988ce19fa09499e5c06de339cb6f6cb14744f5baab678473e45

Download Submit
memory/388-19-0x0000000000400000-0x00000000004FF000-memory.dmp

Filesize
1020KB

Download
memory/388-23-0x0000000000400000-0x00000000004FF000-memory.dmp

Filesize
1020KB

Download
memory/2232-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2232-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2232-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2232-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2232-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3708-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3708-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3708-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3708-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3708-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3708-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3708-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3708-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3708-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3708-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3708-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4364-1-0x0000000002130000-0x00000000021C4000-memory.dmp

Filesize
592KB

Download
memory/4364-2-0x00000000021D0000-0x00000000022EB000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads