djvu | 1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3

General

Target

1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe
Size

807KB
MD5

723aa64d603ccfb48104924995501a2a
SHA1

f9ecef27ab4601756647985070d5546e04ec0761
SHA256

1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3
SHA512

b1a0e4f526c0652307dfd645639e06b173ecc3c4131fbf1aa13a518ad232851d97febfacb0820abd4f5f97ebc3b4e1a37ec5525371ac83692c73c1b53330c457
SSDEEP

12288:oKzU2/9reIPrj1AUWEvVInb+ZS6krXoKWoBPRottaUtLtJxheBEUHlMEZDnnKikm:zFXJHe+46ixZP28UFtleBEUHfDKikm

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 14 IoCs

resource	yara_rule
behavioral2/memory/4196-2-0x00000000037A0000-0x00000000038BB000-memory.dmp	family_djvu
behavioral2/memory/4864-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4864-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4864-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4864-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4864-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2780-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2780-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2780-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2780-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2780-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2780-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2780-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2780-36-0x0000000000400000-0x0000000000537000-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
828	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-1-5-21-3968772205-1713802336-1776639840-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e59348c6-8659-4088-b04f-48e463d6a751\\1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe\" --AutoStart"	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.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 4196 set thread context of 4864	4196	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	72
PID 3620 set thread context of 2780	3620	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	76

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
4864	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe
4864	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe
2780	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe
2780	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4196 wrote to memory of 4864	4196	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	72
PID 4196 wrote to memory of 4864	4196	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	72
PID 4196 wrote to memory of 4864	4196	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	72
PID 4196 wrote to memory of 4864	4196	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	72
PID 4196 wrote to memory of 4864	4196	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	72
PID 4196 wrote to memory of 4864	4196	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	72
PID 4196 wrote to memory of 4864	4196	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	72
PID 4196 wrote to memory of 4864	4196	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	72
PID 4196 wrote to memory of 4864	4196	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	72
PID 4196 wrote to memory of 4864	4196	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	72
PID 4864 wrote to memory of 828	4864	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	73
PID 4864 wrote to memory of 828	4864	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	73
PID 4864 wrote to memory of 828	4864	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	73
PID 4864 wrote to memory of 3620	4864	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	74
PID 4864 wrote to memory of 3620	4864	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	74
PID 4864 wrote to memory of 3620	4864	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	74
PID 3620 wrote to memory of 2780	3620	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	76
PID 3620 wrote to memory of 2780	3620	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	76
PID 3620 wrote to memory of 2780	3620	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	76
PID 3620 wrote to memory of 2780	3620	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	76
PID 3620 wrote to memory of 2780	3620	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	76
PID 3620 wrote to memory of 2780	3620	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	76
PID 3620 wrote to memory of 2780	3620	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	76
PID 3620 wrote to memory of 2780	3620	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	76
PID 3620 wrote to memory of 2780	3620	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	76
PID 3620 wrote to memory of 2780	3620	1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe	76

C:\Users\Admin\AppData\Local\Temp\1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe
"C:\Users\Admin\AppData\Local\Temp\1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4196
- C:\Users\Admin\AppData\Local\Temp\1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe
  "C:\Users\Admin\AppData\Local\Temp\1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4864
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\e59348c6-8659-4088-b04f-48e463d6a751" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:828
- - C:\Users\Admin\AppData\Local\Temp\1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe
    "C:\Users\Admin\AppData\Local\Temp\1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3620
  - - C:\Users\Admin\AppData\Local\Temp\1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe
      "C:\Users\Admin\AppData\Local\Temp\1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2780

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
5857aff0ea0365561d0f06769a04101c

SHA1
0ac570f0ec93618c5849baf94c0a167e4a706a95

SHA256
b50c616b5c29bd9611ed360a238b6b6c421d0fe3b85df331e4951aefab526b2e

SHA512
1863b40407893a4a26beaa7ae4add199676c15b633d59afb4dfd2906328b29497fdddcb0ff01b9ba77ac59c5c55511fa669b0ffd6e02bcfa2d2cc53df62390be

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
f5074aecc81d5fdf79a5cbdf366cca89

SHA1
871680fdd67b4a0d836c1268e265bc716bef1da6

SHA256
5d11efabc5f0ce10dafe74643eba90a81a7c13e06d26a0b9046d6d672885f7e9

SHA512
e2935ba1bf2c64cf4a355196cb4c7451f4ff3d1b59283790980b588cde0880288c2f1e83dd07763115408bb8416b1ae9ca00ac8a1ad759e34aab45a53da75a65

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

Filesize
392B

MD5
c0215a7949cbb572f7a9598ccadbcc22

SHA1
2a2767c26552d8854294966be5ee7a1bedc65d1f

SHA256
5c3905f59f8350090b52e36e86737cffa00c4df6437ced3cfa6ef8e3a1aa36fa

SHA512
667689afc9062eed89156435b7b564fc14a36aba352b9e950cb5edd7ca89c9b35d489e8d703815074a90771b200e6e82995aef91e9249c1ff9a1c9a72710dd7a

Download Submit
C:\Users\Admin\AppData\Local\e59348c6-8659-4088-b04f-48e463d6a751\1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3.exe

Filesize
807KB

MD5
723aa64d603ccfb48104924995501a2a

SHA1
f9ecef27ab4601756647985070d5546e04ec0761

SHA256
1fcf99e0b22fe58b75d1772c030886b43e0411ccd6e8fe5a2c1139327080aec3

SHA512
b1a0e4f526c0652307dfd645639e06b173ecc3c4131fbf1aa13a518ad232851d97febfacb0820abd4f5f97ebc3b4e1a37ec5525371ac83692c73c1b53330c457

Download Submit
memory/2780-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2780-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2780-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2780-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2780-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2780-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2780-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2780-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4196-1-0x0000000003700000-0x0000000003799000-memory.dmp

Filesize
612KB

Download
memory/4196-2-0x00000000037A0000-0x00000000038BB000-memory.dmp

Filesize
1.1MB

Download
memory/4864-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4864-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4864-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4864-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4864-19-0x0000000000400000-0x0000000000537000-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