djvu | 5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb

Analysis

max time kernel
142s
max time network
123s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
03/05/2024, 23:40

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General

Target
5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe
Size 808KB
Sample240503-3pcm6sgf71
SHA256 5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb
MD5 58284dd1037b514f642f3e499ea2cbc1
SHA1 2a9f51e2efe67c748c5e1d640a48294c6005aab9
SHA512 5442b44464d5a1491f206739b1c871cbf8ace2ce327b481dcda87822d8627ee7e972544cbb856b305f78662791dcb434a135a5b9f21937a474fae4ca737f49d3
SSDEEP 12288:3QtxwYjb7VcARzySgi3cViMlyMXs2O1gzlt0MVMM+bqK8:Gp3xZCrlNtii3hxI
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://cajgtus.com/test2/get.php

Attributes

extension
.bgzq
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
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/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 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: 0864PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 18 IoCs

resource	yara_rule
behavioral2/memory/2704-1-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3824-4-0x0000000003850000-0x000000000396B000-memory.dmp	family_djvu
behavioral2/memory/2704-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2704-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2704-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2704-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/764-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/764-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/764-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/764-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/764-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/764-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4488-35-0x0000000000400000-0x0000000001A94000-memory.dmp	family_djvu
behavioral2/memory/764-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/764-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/764-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/764-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/764-41-0x0000000000400000-0x0000000000537000-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
2400	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-1-5-21-293923083-2364846840-4256557006-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\4ba43641-8952-4078-85c9-f898e539ea27\\5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe\" --AutoStart"	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.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
6	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3824 set thread context of 2704	3824	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	80
PID 4488 set thread context of 764	4488	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	86

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
2704	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe
2704	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe
764	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe
764	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3824 wrote to memory of 2704	3824	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	80
PID 3824 wrote to memory of 2704	3824	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	80
PID 3824 wrote to memory of 2704	3824	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	80
PID 3824 wrote to memory of 2704	3824	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	80
PID 3824 wrote to memory of 2704	3824	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	80
PID 3824 wrote to memory of 2704	3824	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	80
PID 3824 wrote to memory of 2704	3824	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	80
PID 3824 wrote to memory of 2704	3824	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	80
PID 3824 wrote to memory of 2704	3824	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	80
PID 3824 wrote to memory of 2704	3824	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	80
PID 2704 wrote to memory of 2400	2704	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	82
PID 2704 wrote to memory of 2400	2704	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	82
PID 2704 wrote to memory of 2400	2704	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	82
PID 2704 wrote to memory of 4488	2704	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	83
PID 2704 wrote to memory of 4488	2704	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	83
PID 2704 wrote to memory of 4488	2704	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	83
PID 4488 wrote to memory of 764	4488	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	86
PID 4488 wrote to memory of 764	4488	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	86
PID 4488 wrote to memory of 764	4488	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	86
PID 4488 wrote to memory of 764	4488	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	86
PID 4488 wrote to memory of 764	4488	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	86
PID 4488 wrote to memory of 764	4488	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	86
PID 4488 wrote to memory of 764	4488	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	86
PID 4488 wrote to memory of 764	4488	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	86
PID 4488 wrote to memory of 764	4488	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	86
PID 4488 wrote to memory of 764	4488	5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe	86

C:\Users\Admin\AppData\Local\Temp\5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe
"C:\Users\Admin\AppData\Local\Temp\5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3824
- C:\Users\Admin\AppData\Local\Temp\5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe
  "C:\Users\Admin\AppData\Local\Temp\5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2704
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\4ba43641-8952-4078-85c9-f898e539ea27" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2400
- - C:\Users\Admin\AppData\Local\Temp\5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe
    "C:\Users\Admin\AppData\Local\Temp\5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4488
  - - C:\Users\Admin\AppData\Local\Temp\5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe
      "C:\Users\Admin\AppData\Local\Temp\5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:764

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

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 3288e6f724771438fe8227bb403d055e9394a1bf75d4e2352064e7aed8b7cdaf
MD5 3a0cd3d51fefef44420acbb85bffe07a
SHA1 e726fad0f51c4a79292e6d411875a04a071214cd
SHA512 ba144b4be1adcd5d7d6039b80310ddbeb01d15aa7f32844226f9a56dc9f4391ae68846fa57123d8b04e638d497c482e7e5c94eedea900f38fc52df052bd08a30
MD5 SHA1 SHA512

Submit Download

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 8de981eceba341e789196261601efa45797a2ad56d1a19c2bc782fec36f435ac
MD5 cb0b4fbb0cd04d0f30406c588ad30a92
SHA1 d9c9aecd5258399952b671331c7932e247e30a8f
SHA512 597b447414efa75f580ca23baa0adf7732da0b474a4de030a0ee7c7de2a0d02368e798abb34097b3fcde8f9ec3b15d3a5cd528861a54ab4f0a247bfb9a4f6d2d
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 4db83c79017ec6acdef5ea6864ec4f71df18b8c0849f8fb2ce362f3e87879af3
MD5 89a3ee86fe4610ff8c7fab7af1e83c36
SHA1 be3f9852b940fec480cc836b7f7833f7c822d76e
SHA512 eb13bf63a4393ab291f12857f5fea07ddf00764ffc228323567eef0999365cca4d4cde32533fb46cf3389b671a73a344e24e686813aa01ea6e05367f2fb1b683
MD5 SHA1 SHA512

Submit Download

5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe

Path C:\Users\Admin\AppData\Local\4ba43641-8952-4078-85c9-f898e539ea27\5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb.exe
Size 808KB
SHA256 5a6c067494603d8231e1f58c56abe5542f0bef292274004c37952af6b8e155fb
MD5 58284dd1037b514f642f3e499ea2cbc1
SHA1 2a9f51e2efe67c748c5e1d640a48294c6005aab9
SHA512 5442b44464d5a1491f206739b1c871cbf8ace2ce327b481dcda87822d8627ee7e972544cbb856b305f78662791dcb434a135a5b9f21937a474fae4ca737f49d3
SSDEEP 12288:3QtxwYjb7VcARzySgi3cViMlyMXs2O1gzlt0MVMM+bqK8:Gp3xZCrlNtii3hxI
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/764-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/764-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/764-41-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/764-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/764-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/764-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/764-40-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/764-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/764-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/764-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/764-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2704-1-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2704-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2704-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2704-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2704-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3824-4-0x0000000003850000-0x000000000396B000-memory.dmp

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memory/3824-2-0x0000000001D90000-0x0000000001E2C000-memory.dmp

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memory/4488-35-0x0000000000400000-0x0000000001A94000-memory.dmp

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memory/4488-24-0x0000000000400000-0x0000000001A94000-memory.dmp

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