djvu | 9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37

Analysis

max time kernel
147s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
08/05/2024, 04:44

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General

Target
9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe
Size 725KB
Sample240508-fcs33aea42
SHA256 9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37
MD5 486a1a84fb2b9ce4a36cde465dd514f9
SHA1 b4462decfbd253983892b55d976bdf8840c17bee
SHA512 181bbd61e0a7b9a0205de53433327de91c7072b498c0f4da6468bbef87ddc0dd8990119a99b998a4f4c476fb55acd32d01afe0b87a31fb14e11780da12f9d155
SSDEEP 12288:jChRWoj5UwGTIvplXrLi44lxwzWnZBPi3pZh20SgVN+4UIhgnv2na+H+JuVBh2Gp:jCKwwCpFLiVBnji3pZh24+lnvga+Hjjt
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/3364-2-0x0000000003880000-0x000000000399B000-memory.dmp	family_djvu
behavioral2/memory/3496-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3496-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3496-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3496-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3496-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5016-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5016-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5016-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5016-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5016-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5016-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5016-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5016-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5016-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5016-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5016-41-0x0000000000400000-0x0000000000537000-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
1852	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-1-5-21-2878097196-921257239-309638238-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f2f3eddd-69b1-45d7-8605-7a0346fc8b0c\\9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe\" --AutoStart"	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.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
2	api.2ip.ua
7	api.2ip.ua
1	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3364 set thread context of 3496	3364	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	80
PID 1100 set thread context of 5016	1100	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	85

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
3496	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe
3496	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe
5016	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe
5016	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3364 wrote to memory of 3496	3364	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	80
PID 3364 wrote to memory of 3496	3364	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	80
PID 3364 wrote to memory of 3496	3364	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	80
PID 3364 wrote to memory of 3496	3364	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	80
PID 3364 wrote to memory of 3496	3364	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	80
PID 3364 wrote to memory of 3496	3364	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	80
PID 3364 wrote to memory of 3496	3364	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	80
PID 3364 wrote to memory of 3496	3364	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	80
PID 3364 wrote to memory of 3496	3364	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	80
PID 3364 wrote to memory of 3496	3364	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	80
PID 3496 wrote to memory of 1852	3496	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	81
PID 3496 wrote to memory of 1852	3496	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	81
PID 3496 wrote to memory of 1852	3496	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	81
PID 3496 wrote to memory of 1100	3496	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	82
PID 3496 wrote to memory of 1100	3496	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	82
PID 3496 wrote to memory of 1100	3496	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	82
PID 1100 wrote to memory of 5016	1100	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	85
PID 1100 wrote to memory of 5016	1100	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	85
PID 1100 wrote to memory of 5016	1100	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	85
PID 1100 wrote to memory of 5016	1100	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	85
PID 1100 wrote to memory of 5016	1100	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	85
PID 1100 wrote to memory of 5016	1100	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	85
PID 1100 wrote to memory of 5016	1100	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	85
PID 1100 wrote to memory of 5016	1100	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	85
PID 1100 wrote to memory of 5016	1100	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	85
PID 1100 wrote to memory of 5016	1100	9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe	85

C:\Users\Admin\AppData\Local\Temp\9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe
"C:\Users\Admin\AppData\Local\Temp\9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3364
- C:\Users\Admin\AppData\Local\Temp\9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe
  "C:\Users\Admin\AppData\Local\Temp\9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3496
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\f2f3eddd-69b1-45d7-8605-7a0346fc8b0c" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1852
- - C:\Users\Admin\AppData\Local\Temp\9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe
    "C:\Users\Admin\AppData\Local\Temp\9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1100
  - - C:\Users\Admin\AppData\Local\Temp\9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe
      "C:\Users\Admin\AppData\Local\Temp\9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:5016

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 7bae65328d14e2ce2c8d6faa6afde8a1eb618ba518315ee4e70ee5eab8f1f7b9
MD5 13ad2e7c7ea6d871fc884c4be8390c58
SHA1 b7ed38b46ccd4ec625dfc6422e1c1a4d2fced5da
SHA512 fd1a30c9155a461800ca29d315bf925bde125e4c8685007a97a0a2c4f5e0642116710b581776f1f5b13dea690a0c6c5c396d2a3d5b8a6f9a4b0d7418425b91ee
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 f63869533935e00aa5afab13c953d968ca2d14dea646176b8460bbe35f194e1d
MD5 0e975e8c21e952acb3ef43648bedcd54
SHA1 5cddf5f849f2d08efd165b34e8e744feec76efc1
SHA512 93c2674f4e12d7e2a1a720e1489259f77ca8a7ac75314adc9a321a12f30eac03dc635b2173b603eddd88edc8e8308c70f9f1e1b074b952bcdf1f84afff708b9a
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 962cd56f2a2c7393f838c434604b62b42485c3330eebb3380e62a7ad94166fc1
MD5 c66ab47dd49e802606927ae39942e4b4
SHA1 47ae0cbab3a1168467e3ea5da20ec20aeed5a98b
SHA512 6634b814301fdf3add7bd9b6fba8635a7c64c2a510720d8b6b892dae25b2b73899b09afce91e051a0d1ede1fae7dfbd6ceeda5393d8de827c9f5c8fd0b2bfc31
MD5 SHA1 SHA512

Submit Download

9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe

Path C:\Users\Admin\AppData\Local\f2f3eddd-69b1-45d7-8605-7a0346fc8b0c\9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37.exe
Size 725KB
SHA256 9960115afc5cff87ca3bf1a59a161e3a24bda8bf2740af585b7a4a3ec71f2b37
MD5 486a1a84fb2b9ce4a36cde465dd514f9
SHA1 b4462decfbd253983892b55d976bdf8840c17bee
SHA512 181bbd61e0a7b9a0205de53433327de91c7072b498c0f4da6468bbef87ddc0dd8990119a99b998a4f4c476fb55acd32d01afe0b87a31fb14e11780da12f9d155
SSDEEP 12288:jChRWoj5UwGTIvplXrLi44lxwzWnZBPi3pZh20SgVN+4UIhgnv2na+H+JuVBh2Gp:jCKwwCpFLiVBnji3pZh24+lnvga+Hjjt
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1100-35-0x0000000000400000-0x0000000001A80000-memory.dmp

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memory/1100-24-0x0000000000400000-0x0000000001A80000-memory.dmp

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memory/3364-1-0x00000000037E0000-0x000000000387E000-memory.dmp

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memory/3364-2-0x0000000003880000-0x000000000399B000-memory.dmp

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memory/3496-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3496-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3496-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3496-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3496-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5016-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5016-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5016-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5016-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5016-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5016-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5016-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5016-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5016-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5016-40-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5016-41-0x0000000000400000-0x0000000000537000-memory.dmp

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