djvu | b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba

Analysis

max time kernel
300s
max time network
288s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
04/05/2024, 22:41

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General

Target
b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
Size 790KB
Sample240504-2l4rtaha59
SHA256 b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba
MD5 6cfe2406e455d36d811044995c2fbc6f
SHA1 4990445095184c656d0221d77815e221a0e1ce76
SHA512 f1528e12f1ad559053a52616531b0a1388577b6ba97fefdbbed34bc8bc245f6788053dacf001e2607e1173ef85eef23ebd3f5f72b68f4a74c5ed9b34410ee1b9
SSDEEP 12288:YzB2L9gHLT7eWDKcwxZLvqdgj1LbW8RUp5LZ9eIDMS3shf:9xi7bK7Lu8OZ5KiMhh
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 14 IoCs

resource	yara_rule
behavioral2/memory/5044-2-0x0000000004950000-0x0000000004A6B000-memory.dmp	family_djvu
behavioral2/memory/4636-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4636-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4636-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4636-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4636-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3356-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3356-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3356-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3356-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3356-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3356-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3356-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3356-36-0x0000000000400000-0x0000000000537000-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
1088	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-1-5-21-160447019-1232603106-4168707212-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\21ca889e-1821-4c3a-be56-c0fb3008f5e9\\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe\" --AutoStart"	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.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
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 5044 set thread context of 4636	5044	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	72
PID 512 set thread context of 3356	512	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.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
4636	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
4636	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
3356	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
3356	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 5044 wrote to memory of 4636	5044	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	72
PID 5044 wrote to memory of 4636	5044	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	72
PID 5044 wrote to memory of 4636	5044	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	72
PID 5044 wrote to memory of 4636	5044	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	72
PID 5044 wrote to memory of 4636	5044	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	72
PID 5044 wrote to memory of 4636	5044	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	72
PID 5044 wrote to memory of 4636	5044	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	72
PID 5044 wrote to memory of 4636	5044	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	72
PID 5044 wrote to memory of 4636	5044	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	72
PID 5044 wrote to memory of 4636	5044	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	72
PID 4636 wrote to memory of 1088	4636	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	73
PID 4636 wrote to memory of 1088	4636	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	73
PID 4636 wrote to memory of 1088	4636	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	73
PID 4636 wrote to memory of 512	4636	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	74
PID 4636 wrote to memory of 512	4636	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	74
PID 4636 wrote to memory of 512	4636	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	74
PID 512 wrote to memory of 3356	512	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	76
PID 512 wrote to memory of 3356	512	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	76
PID 512 wrote to memory of 3356	512	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	76
PID 512 wrote to memory of 3356	512	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	76
PID 512 wrote to memory of 3356	512	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	76
PID 512 wrote to memory of 3356	512	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	76
PID 512 wrote to memory of 3356	512	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	76
PID 512 wrote to memory of 3356	512	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	76
PID 512 wrote to memory of 3356	512	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	76
PID 512 wrote to memory of 3356	512	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	76

C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
"C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5044
- C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
  "C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4636
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\21ca889e-1821-4c3a-be56-c0fb3008f5e9" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1088
- - C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
    "C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:512
  - - C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
      "C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:3356

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 c90743b555faf3ed141c4c83e5002c4da6445c3be1ad82b01c98da2201cf6818
MD5 9ed6fed9b6e5aaa9afcba833c1b8c259
SHA1 2ed30daf7f0277a0718b3d9ce46b0658640cc2ba
SHA512 a9abd9ca06479e56d08e1649b344cfd06beec24567d1053616670afd7f47757d7ab186c2cd20d21f53a901ede92b14382fc42ab21df6605d69702c0368106367
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 c37008bc0c0b4fbb0a084757b165ccb317514fa56a7ac7bc464c481208352db6
MD5 c179e67621c58e17d600e3aad700ced6
SHA1 41d26e71943e9ef462320da3ee60cdab7ddaf1b7
SHA512 33b2e3dc3bffb36adda810f16a2e7ff9a3d83edb6b20347b401fdba079289f46d35b271b6006eddbc56b8f606d7b629f5b153bd3342c3577d2a33ea940207de0
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 9293c86ce7433ceae505673a87bba1b4b1c0011af92357833aa240f5d54bf247
MD5 86eae4a0a5cfadf7bc74eccc8c3ed193
SHA1 e9b0b6875fa4779cd60ccb5b20d3d312f9d3a2e4
SHA512 c7e0e56e051344afc298f40bcfc807a85e23af3fe9a278e400866f41afbf6092089d82e13623dc1364eb50a194e3163bf998d13be90d9940c020cdb63f479c21
MD5 SHA1 SHA512

Submit Download

b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe

Path C:\Users\Admin\AppData\Local\21ca889e-1821-4c3a-be56-c0fb3008f5e9\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
Size 790KB
SHA256 b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba
MD5 6cfe2406e455d36d811044995c2fbc6f
SHA1 4990445095184c656d0221d77815e221a0e1ce76
SHA512 f1528e12f1ad559053a52616531b0a1388577b6ba97fefdbbed34bc8bc245f6788053dacf001e2607e1173ef85eef23ebd3f5f72b68f4a74c5ed9b34410ee1b9
SSDEEP 12288:YzB2L9gHLT7eWDKcwxZLvqdgj1LbW8RUp5LZ9eIDMS3shf:9xi7bK7Lu8OZ5KiMhh
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/3356-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3356-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3356-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3356-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3356-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3356-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3356-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3356-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4636-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4636-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4636-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4636-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4636-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5044-2-0x0000000004950000-0x0000000004A6B000-memory.dmp

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memory/5044-1-0x0000000002FE0000-0x000000000307D000-memory.dmp

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