djvu | 6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347

General

Target

6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe
Size

743KB
MD5

ab7f5c6b0c187e475ea5ae7e42de2d3c
SHA1

7b4c3f5e22bfab8cdb856f90496fb70554ae0cfe
SHA256

6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347
SHA512

20f7818183b53f7f339bef38bfe0c94794c087d9f0750ae558c09c11c5527272de67a95f3e548ed819045852b0403932ff36d9f8ec0cc881faa31ad45345cbc6
SSDEEP

12288:sX6KW8Cr/nrSwPcmV4eIwNn5x5vQWHXvZB9w5dPQ8i:sX1YrPuwPtRpn5x5vQWRE5dPa

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.qepi
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: 0867PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral2/memory/3716-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3716-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3716-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1640-4-0x0000000004320000-0x000000000443B000-memory.dmp	family_djvu
behavioral2/memory/3716-1-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3716-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1812-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1812-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1812-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1812-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1812-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1812-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1812-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1812-36-0x0000000000400000-0x0000000000537000-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
4192	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-1-5-21-3699363923-1875576828-3287151903-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\210930c4-2275-412c-9d73-80b0d4f45e94\\6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe\" --AutoStart"	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.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
10	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1640 set thread context of 3716	1640	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	74
PID 2544 set thread context of 1812	2544	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	78

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
3716	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe
3716	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe
1812	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe
1812	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1640 wrote to memory of 3716	1640	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	74
PID 1640 wrote to memory of 3716	1640	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	74
PID 1640 wrote to memory of 3716	1640	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	74
PID 1640 wrote to memory of 3716	1640	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	74
PID 1640 wrote to memory of 3716	1640	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	74
PID 1640 wrote to memory of 3716	1640	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	74
PID 1640 wrote to memory of 3716	1640	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	74
PID 1640 wrote to memory of 3716	1640	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	74
PID 1640 wrote to memory of 3716	1640	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	74
PID 1640 wrote to memory of 3716	1640	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	74
PID 3716 wrote to memory of 4192	3716	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	75
PID 3716 wrote to memory of 4192	3716	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	75
PID 3716 wrote to memory of 4192	3716	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	75
PID 3716 wrote to memory of 2544	3716	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	76
PID 3716 wrote to memory of 2544	3716	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	76
PID 3716 wrote to memory of 2544	3716	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	76
PID 2544 wrote to memory of 1812	2544	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	78
PID 2544 wrote to memory of 1812	2544	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	78
PID 2544 wrote to memory of 1812	2544	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	78
PID 2544 wrote to memory of 1812	2544	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	78
PID 2544 wrote to memory of 1812	2544	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	78
PID 2544 wrote to memory of 1812	2544	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	78
PID 2544 wrote to memory of 1812	2544	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	78
PID 2544 wrote to memory of 1812	2544	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	78
PID 2544 wrote to memory of 1812	2544	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	78
PID 2544 wrote to memory of 1812	2544	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	78

C:\Users\Admin\AppData\Local\Temp\6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe
"C:\Users\Admin\AppData\Local\Temp\6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1640
- C:\Users\Admin\AppData\Local\Temp\6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe
  "C:\Users\Admin\AppData\Local\Temp\6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3716
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\210930c4-2275-412c-9d73-80b0d4f45e94" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4192
- - C:\Users\Admin\AppData\Local\Temp\6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe
    "C:\Users\Admin\AppData\Local\Temp\6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2544
  - - C:\Users\Admin\AppData\Local\Temp\6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe
      "C:\Users\Admin\AppData\Local\Temp\6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1812

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
c385b784ab9ca816e84a497ed6ae04cc

SHA1
ebf2dba7c1f1425116a8ff8b73eab06fc4e47a7a

SHA256
8b1eaa18dd169f3513c85869aca04c1a469ce3351e81bb54ea0fde5c80396566

SHA512
19bf0214112ce18c9f804d386a9d306b5e77479cb863dfd9eb90ce16ab7eab9dd2aa490e82b99df81ddcde41525eff5c4997c912ea0d85db589c2121e3db0718

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
78bf457401038676e44c6d101dfff7ca

SHA1
de9eac4b26b3aed66c89eaad511d09c1247183c8

SHA256
2b9ca9e6fb8257e2c5c3fd1f0dcc7b7e29e008e99b6d9ac5ecc092e7a04fbe82

SHA512
06b6c989e8ea5073e0aa7880caeb23883767233f790a026a1921644e6844868eb47624eed70920b4fe9001a702a2dc5cbd8315650341ae2ad42238865ac1ae69

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

Filesize
392B

MD5
2404eb10e1f15834aedf1b8b4e670c72

SHA1
7efe58f1d38afaf112959b2f0a3e71f92a1247e0

SHA256
fe978be196b40b61250b254d15e1847591c5ee230d40a6382e5d4ff13b043b03

SHA512
b4bc2f249ba91e5b5e8b56d02feede4b2bb591eb8068942d2b67eb8de1cd824572201339c6310cd955a1e251b08cf3a20bb187d996b49289cba0ab87ff906de4

Download Submit
C:\Users\Admin\AppData\Local\210930c4-2275-412c-9d73-80b0d4f45e94\6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe

Filesize
743KB

MD5
ab7f5c6b0c187e475ea5ae7e42de2d3c

SHA1
7b4c3f5e22bfab8cdb856f90496fb70554ae0cfe

SHA256
6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347

SHA512
20f7818183b53f7f339bef38bfe0c94794c087d9f0750ae558c09c11c5527272de67a95f3e548ed819045852b0403932ff36d9f8ec0cc881faa31ad45345cbc6

Download Submit
memory/1640-2-0x00000000027A0000-0x000000000283E000-memory.dmp

Filesize
632KB

Download
memory/1640-4-0x0000000004320000-0x000000000443B000-memory.dmp

Filesize
1.1MB

Download
memory/1812-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1812-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1812-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1812-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1812-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1812-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1812-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1812-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3716-1-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3716-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3716-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3716-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3716-19-0x0000000000400000-0x0000000000537000-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