djvu | fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597

Analysis

max time kernel
148s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
28/05/2024, 15:22

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General

Target
fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe
Size 814KB
Sample240528-sr2pzabc42
SHA256 fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597
MD5 e3cdd6c9d4cb29d2665fa20f4111a9d9
SHA1 5645c03cb29313a4e514a018e724f70825f37f65
SHA512 6eaf4c8201abbbd0307313ce1c0c0231e90e1d80dc920e2597c576023c58131f4a48903ce579cc95f7d75790854220b41bebb84a3633fca32037f9e476a3b5f3
SSDEEP 12288:LutJ8/wjjYevFQ29QNWgHtYk8DqwxZL9I+tYiY97eWjocWZx:kHYaS/69X7GiuLt
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.vehu
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: 0872PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/2068-2-0x0000000004AD0000-0x0000000004BEB000-memory.dmp	family_djvu
behavioral2/memory/2792-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2792-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2792-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2792-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2792-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2984-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2984-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2984-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2984-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2984-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2984-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2984-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2984-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2984-37-0x0000000000400000-0x0000000000537000-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
4644	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-1-5-21-2551177587-3778486488-1329702901-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\b696b763-fa8b-4849-80e8-62bb40e30d6d\\fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe\" --AutoStart"	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.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
3	api.2ip.ua
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2068 set thread context of 2792	2068	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	76
PID 4048 set thread context of 2984	4048	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	81

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
2792	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe
2792	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe
2984	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe
2984	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2068 wrote to memory of 2792	2068	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	76
PID 2068 wrote to memory of 2792	2068	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	76
PID 2068 wrote to memory of 2792	2068	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	76
PID 2068 wrote to memory of 2792	2068	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	76
PID 2068 wrote to memory of 2792	2068	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	76
PID 2068 wrote to memory of 2792	2068	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	76
PID 2068 wrote to memory of 2792	2068	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	76
PID 2068 wrote to memory of 2792	2068	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	76
PID 2068 wrote to memory of 2792	2068	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	76
PID 2068 wrote to memory of 2792	2068	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	76
PID 2792 wrote to memory of 4644	2792	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	77
PID 2792 wrote to memory of 4644	2792	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	77
PID 2792 wrote to memory of 4644	2792	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	77
PID 2792 wrote to memory of 4048	2792	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	78
PID 2792 wrote to memory of 4048	2792	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	78
PID 2792 wrote to memory of 4048	2792	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	78
PID 4048 wrote to memory of 2984	4048	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	81
PID 4048 wrote to memory of 2984	4048	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	81
PID 4048 wrote to memory of 2984	4048	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	81
PID 4048 wrote to memory of 2984	4048	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	81
PID 4048 wrote to memory of 2984	4048	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	81
PID 4048 wrote to memory of 2984	4048	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	81
PID 4048 wrote to memory of 2984	4048	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	81
PID 4048 wrote to memory of 2984	4048	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	81
PID 4048 wrote to memory of 2984	4048	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	81
PID 4048 wrote to memory of 2984	4048	fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe	81

C:\Users\Admin\AppData\Local\Temp\fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe
"C:\Users\Admin\AppData\Local\Temp\fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2068
- C:\Users\Admin\AppData\Local\Temp\fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe
  "C:\Users\Admin\AppData\Local\Temp\fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2792
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\b696b763-fa8b-4849-80e8-62bb40e30d6d" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4644
- - C:\Users\Admin\AppData\Local\Temp\fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe
    "C:\Users\Admin\AppData\Local\Temp\fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4048
  - - C:\Users\Admin\AppData\Local\Temp\fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe
      "C:\Users\Admin\AppData\Local\Temp\fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2984

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 3916c05fda5d33c49141174c4da640ece2f0f38ceaf5c8feaf70c61f41b199ee
MD5 38eb8de98052391cd4ef2a1d0cb81088
SHA1 16f6223fa8b7c0dc57c5a1e1bc6e5938b40f42b4
SHA512 edcfb55ca481f1072870c560b6c4d6eaece1ac6d3e219c6f4471835bd675019d433d93f933864c5161225516b296ae0a36e0291c337bf151fc274eb47accdd54
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 170dca7a1cba59dcfa4eda248cca5042c5b42d9885b12e2fc44c56207d684463
MD5 19635149fa51f5288258e0f89f1a7234
SHA1 0969f1ed7cf3c49143826a0cee2b1086f7ca5354
SHA512 4ed0f8464facc35e7843a9e39fcc1ce16bbe66bb5782e3431aa84f30669e639ab0daf569cb0f71b167b6a1fdadb79c89ce33bdafd62c1c6ab78bbd826bf1909c
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 136b1982997085ac8149736e6b1822b0f45cd7e64f66eae83eb89f9ca256327b
MD5 760794a806151951d1260bf3df20ef0f
SHA1 be0cfddce65575ff24fccd8124efdc11f4c23208
SHA512 7b06277208cd3b4b4cca547b093b6aed5464704ef4ee37967e9409ed8d95f66bc64aaf9065d4c9122f5fc81922918fa303d317603ab41a1f89c7ea3bfbaf3b17
MD5 SHA1 SHA512

Submit Download

fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe

Path C:\Users\Admin\AppData\Local\b696b763-fa8b-4849-80e8-62bb40e30d6d\fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597.exe
Size 814KB
SHA256 fca08db0fdad2ac7cce687b108a31f9f7f8f5713a7626e556f16a580d653b597
MD5 e3cdd6c9d4cb29d2665fa20f4111a9d9
SHA1 5645c03cb29313a4e514a018e724f70825f37f65
SHA512 6eaf4c8201abbbd0307313ce1c0c0231e90e1d80dc920e2597c576023c58131f4a48903ce579cc95f7d75790854220b41bebb84a3633fca32037f9e476a3b5f3
SSDEEP 12288:LutJ8/wjjYevFQ29QNWgHtYk8DqwxZL9I+tYiY97eWjocWZx:kHYaS/69X7GiuLt
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2068-2-0x0000000004AD0000-0x0000000004BEB000-memory.dmp

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memory/2068-1-0x0000000004A30000-0x0000000004AC5000-memory.dmp

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memory/2792-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2792-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2792-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2792-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2792-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2984-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2984-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2984-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2984-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2984-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2984-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2984-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2984-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2984-37-0x0000000000400000-0x0000000000537000-memory.dmp

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