djvu | 1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
05/05/2024, 19:21

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General

Target
1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe
Size 826KB
Sample240505-x2y42sec48
SHA256 1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af
MD5 b0e7b0f70903c57ee27041efdfffbc12
SHA1 9b53e469911997e9a3fbfb1673060a2c83a84886
SHA512 5acd330c10f5d96a2bdc8211747ea44976dfd62dd2257e4ab8ad51c2049905e15bc561a23260345493b3c43438332baf4b2ab2de4f99fedb150a3962cf62f7e4
SSDEEP 12288:dnf840bmNPbpu2ksj4ei+GzzwLO8SN+39kluhFdRgMNX1LXHv0m9w4ugEp2sx:dE4ZP9u1eRozaQN29k03laLp2
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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 17 IoCs

resource	yara_rule
behavioral2/memory/4484-2-0x0000000003790000-0x00000000038AB000-memory.dmp	family_djvu
behavioral2/memory/4836-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4836-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4836-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4836-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4836-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2824-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2824-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2824-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2824-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2824-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2824-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2824-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2824-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2824-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2824-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2824-41-0x0000000000400000-0x0000000000537000-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-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
5036	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-1-5-21-2818691465-3043947619-2475182763-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\d23ad864-c859-4545-8e35-1911229fe9f2\\1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe\" --AutoStart"	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.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
3	api.2ip.ua
4	api.2ip.ua
12	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4484 set thread context of 4836	4484	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	83
PID 3080 set thread context of 2824	3080	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	89

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
4836	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe
4836	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe
2824	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe
2824	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4484 wrote to memory of 4836	4484	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	83
PID 4484 wrote to memory of 4836	4484	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	83
PID 4484 wrote to memory of 4836	4484	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	83
PID 4484 wrote to memory of 4836	4484	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	83
PID 4484 wrote to memory of 4836	4484	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	83
PID 4484 wrote to memory of 4836	4484	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	83
PID 4484 wrote to memory of 4836	4484	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	83
PID 4484 wrote to memory of 4836	4484	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	83
PID 4484 wrote to memory of 4836	4484	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	83
PID 4484 wrote to memory of 4836	4484	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	83
PID 4836 wrote to memory of 5036	4836	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	85
PID 4836 wrote to memory of 5036	4836	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	85
PID 4836 wrote to memory of 5036	4836	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	85
PID 4836 wrote to memory of 3080	4836	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	87
PID 4836 wrote to memory of 3080	4836	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	87
PID 4836 wrote to memory of 3080	4836	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	87
PID 3080 wrote to memory of 2824	3080	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	89
PID 3080 wrote to memory of 2824	3080	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	89
PID 3080 wrote to memory of 2824	3080	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	89
PID 3080 wrote to memory of 2824	3080	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	89
PID 3080 wrote to memory of 2824	3080	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	89
PID 3080 wrote to memory of 2824	3080	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	89
PID 3080 wrote to memory of 2824	3080	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	89
PID 3080 wrote to memory of 2824	3080	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	89
PID 3080 wrote to memory of 2824	3080	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	89
PID 3080 wrote to memory of 2824	3080	1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe	89

C:\Users\Admin\AppData\Local\Temp\1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe
"C:\Users\Admin\AppData\Local\Temp\1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4484
- C:\Users\Admin\AppData\Local\Temp\1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe
  "C:\Users\Admin\AppData\Local\Temp\1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4836
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\d23ad864-c859-4545-8e35-1911229fe9f2" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:5036
- - C:\Users\Admin\AppData\Local\Temp\1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe
    "C:\Users\Admin\AppData\Local\Temp\1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3080
  - - C:\Users\Admin\AppData\Local\Temp\1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe
      "C:\Users\Admin\AppData\Local\Temp\1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2824

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

File and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 1KB
SHA256 e8569d7b34f8be2c39d098acfc395bde7c314d0ad55b1efefca52ebb3fd3c06a
MD5 aba874fc4f2284853fb8b79aadaeb991
SHA1 e5eafdcc5da8536f1d3a6d138466bb026c0704ad
SHA512 c97cc627ea538fcea4dcb5aefc497adb24c919046d5b6393fdc5c747511d23893d53c612579fadfb8338d6754fa12ba247b1a44a86b0802d075fc6cf2ebf1553
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 724B
SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
MD5 8202a1cd02e7d69597995cabbe881a12
SHA1 8858d9d934b7aa9330ee73de6c476acf19929ff6
SHA512 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
MD5 SHA1 SHA512

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24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 66cdd115329dfc19c43d63a3a97621d7120e41a68264577c33048ae55339e598
MD5 8139912d24417cb854d17d7dc9cae887
SHA1 0b30bbec1c9972f16179415383aa1900b6098d71
SHA512 3728327b548054ed705c4e6227b71908f0c6081de6c8a3aa2ac0e8ff0d40778967b3f5e3894937cf586857b26d64be6cae3bb8aed0bac70a5aba8f10338e53cf
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 66401e08d86a45dd9cebd6ab88d4400c6b8bd19e8866a2c4a56d057f36e8acb4
MD5 42dee2148406cebd1b3d0bb2fab6fdf6
SHA1 65d401d585956cca743c6e19647389482a5b580c
SHA512 5832eba5878f03f22a2858650eaa0acfd9070212656e42fc912aec852613550d691b2f89f527aba5467420e1b6ed5cef0b57479d4f1801593d7687f240b300a0
MD5 SHA1 SHA512

Submit Download

1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe

Path C:\Users\Admin\AppData\Local\d23ad864-c859-4545-8e35-1911229fe9f2\1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af.exe
Size 826KB
SHA256 1b361d25d757a4f4a3ee0d043783d2a3d8635fc5e79fb413d3d87a7b1cb742af
MD5 b0e7b0f70903c57ee27041efdfffbc12
SHA1 9b53e469911997e9a3fbfb1673060a2c83a84886
SHA512 5acd330c10f5d96a2bdc8211747ea44976dfd62dd2257e4ab8ad51c2049905e15bc561a23260345493b3c43438332baf4b2ab2de4f99fedb150a3962cf62f7e4
SSDEEP 12288:dnf840bmNPbpu2ksj4ei+GzzwLO8SN+39kluhFdRgMNX1LXHv0m9w4ugEp2sx:dE4ZP9u1eRozaQN29k03laLp2
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2824-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2824-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2824-41-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2824-40-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2824-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2824-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2824-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2824-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2824-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2824-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2824-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3080-34-0x0000000000400000-0x0000000001A98000-memory.dmp

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memory/3080-24-0x0000000000400000-0x0000000001A98000-memory.dmp

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memory/4484-1-0x00000000036E0000-0x0000000003781000-memory.dmp

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memory/4484-2-0x0000000003790000-0x00000000038AB000-memory.dmp

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memory/4836-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4836-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4836-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4836-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4836-19-0x0000000000400000-0x0000000000537000-memory.dmp

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