djvu | 70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e

Analysis

max time kernel
147s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
26/05/2024, 08:34

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General

Target
70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe
Size 732KB
Sample240526-kgnfladd26
SHA256 70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e
MD5 a4df3595a7aa660f8855c4b4c8083fb0
SHA1 dfaae28bb1af26ca740f98e4a12d3761d67b8df5
SHA512 58d62b50954817c9f31b7eec0f81bbb6c6789b98d3de57151759e93dcde0a237c20ac3b4a5aa0e2d88e4dcc208c7d3f579fa46b28942c11f3ee24b89d5ac4a03
SSDEEP 12288:kXXEi2LytvRYHK6ehdEsH5PmTQPs+L2bDSJXnADZQ8U/uD0hx+Yy7WruKklq5:kXUlLytp+e/H5kQPsUcDSxnADqBPhphD
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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 15 IoCs

resource	yara_rule
behavioral2/memory/3500-2-0x0000000004AE0000-0x0000000004BFB000-memory.dmp	family_djvu
behavioral2/memory/2564-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2564-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2564-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2564-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2564-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1224-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1224-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1224-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1224-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1224-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1224-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1224-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1224-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1224-37-0x0000000000400000-0x0000000000537000-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
2880	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-1-5-21-3433428765-2473475212-4279855560-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\ccb3c9ee-1ffa-49f1-8030-28f5214b6c0a\\70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe\" --AutoStart"	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.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
18	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3500 set thread context of 2564	3500	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	81
PID 3876 set thread context of 1224	3876	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.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
2564	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe
2564	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe
1224	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe
1224	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3500 wrote to memory of 2564	3500	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	81
PID 3500 wrote to memory of 2564	3500	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	81
PID 3500 wrote to memory of 2564	3500	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	81
PID 3500 wrote to memory of 2564	3500	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	81
PID 3500 wrote to memory of 2564	3500	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	81
PID 3500 wrote to memory of 2564	3500	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	81
PID 3500 wrote to memory of 2564	3500	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	81
PID 3500 wrote to memory of 2564	3500	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	81
PID 3500 wrote to memory of 2564	3500	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	81
PID 3500 wrote to memory of 2564	3500	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	81
PID 2564 wrote to memory of 2880	2564	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	82
PID 2564 wrote to memory of 2880	2564	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	82
PID 2564 wrote to memory of 2880	2564	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	82
PID 2564 wrote to memory of 3876	2564	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	83
PID 2564 wrote to memory of 3876	2564	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	83
PID 2564 wrote to memory of 3876	2564	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	83
PID 3876 wrote to memory of 1224	3876	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	86
PID 3876 wrote to memory of 1224	3876	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	86
PID 3876 wrote to memory of 1224	3876	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	86
PID 3876 wrote to memory of 1224	3876	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	86
PID 3876 wrote to memory of 1224	3876	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	86
PID 3876 wrote to memory of 1224	3876	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	86
PID 3876 wrote to memory of 1224	3876	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	86
PID 3876 wrote to memory of 1224	3876	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	86
PID 3876 wrote to memory of 1224	3876	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	86
PID 3876 wrote to memory of 1224	3876	70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe	86

C:\Users\Admin\AppData\Local\Temp\70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe
"C:\Users\Admin\AppData\Local\Temp\70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3500
- C:\Users\Admin\AppData\Local\Temp\70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe
  "C:\Users\Admin\AppData\Local\Temp\70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2564
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\ccb3c9ee-1ffa-49f1-8030-28f5214b6c0a" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2880
- - C:\Users\Admin\AppData\Local\Temp\70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe
    "C:\Users\Admin\AppData\Local\Temp\70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3876
  - - C:\Users\Admin\AppData\Local\Temp\70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe
      "C:\Users\Admin\AppData\Local\Temp\70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1224

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 90bd14730c49d9de6f5d78f7d2f744b0645a1f018e44877b83c6bab81d4531a4
MD5 be3f0a04d543b64dfc8f405ea4a5505b
SHA1 897b54fc3338a7d42f3bf579095f061da3eccb56
SHA512 a0d8c9a7e0914cbebc67773a7acee36090c9fb0cfcadfea8c1cb606ae060d227d5cecea379b483fe8de91f3a2e6c5cdf4141f5be6979444e974ff1e3a24682b7
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

Submit Download

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 16941ac643a7be23ced5e0906d64bebdcf118332f0d131b6b49a25de62144714
MD5 69e5e278cb0adad685d9ee3daf7e1974
SHA1 2624373b3c314bb4e71fc3000a3e02defb790260
SHA512 16778d929d6e105bfc0d46008db497a3ef98ffc093e1091562539241cb754997d3794914721ed3a35f0425464244f9e52afda3fb6a94357abe92a31af696c496
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 3c420c3543247ec5edb949b2c237c7e7926fd07b40778599fec940f347c2ca70
MD5 76843ef2f7d657654e3b44238861eb54
SHA1 a981b34a08a72d9df87ce1c2733a6dc6b7a22e38
SHA512 e7c6234228405b9f68df04f465f1f9007ae4df6583ca74b7acec6eac811bb9d0c37745ac0bbb432e23e746729ed0ff18c2089df6f27443e462bfca18eb318313
MD5 SHA1 SHA512

Submit Download

70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe

Path C:\Users\Admin\AppData\Local\ccb3c9ee-1ffa-49f1-8030-28f5214b6c0a\70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e.exe
Size 732KB
SHA256 70b9c5616bb6678feb578b2ac98bba83bbcd4b8930a7e18eaf4879fdf746f00e
MD5 a4df3595a7aa660f8855c4b4c8083fb0
SHA1 dfaae28bb1af26ca740f98e4a12d3761d67b8df5
SHA512 58d62b50954817c9f31b7eec0f81bbb6c6789b98d3de57151759e93dcde0a237c20ac3b4a5aa0e2d88e4dcc208c7d3f579fa46b28942c11f3ee24b89d5ac4a03
SSDEEP 12288:kXXEi2LytvRYHK6ehdEsH5PmTQPs+L2bDSJXnADZQ8U/uD0hx+Yy7WruKklq5:kXUlLytp+e/H5kQPsUcDSxnADqBPhphD
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1224-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1224-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1224-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1224-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1224-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1224-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1224-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1224-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1224-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2564-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2564-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2564-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2564-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2564-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3500-2-0x0000000004AE0000-0x0000000004BFB000-memory.dmp

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memory/3500-1-0x0000000004A40000-0x0000000004AD9000-memory.dmp

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