djvu | 3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5

Analysis

max time kernel
291s
max time network
300s
platform
windows10-1703_x64
resource
win10-20240611-en
resource tags

arch:x64arch:x86image:win10-20240611-enlocale:en-usos:windows10-1703-x64system
submitted
18/07/2024, 22:33

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General

Target
3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe
Size 700KB
Sample240718-2gvncazejp
SHA256 3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5
MD5 4a585e95952179e7dd63e217ff8d5775
SHA1 0f665e71484876acf2db54714ab910f889741d8a
SHA512 17addcbce4515ee0e1f0ca78d4a39110d15f9efb68128d65dab1ce2c2a6b80525abf40aec7a59aee5e2556917ea0b66df1ad9801eec4085b9f422f9eceaad33d
SSDEEP 12288:j6+LE9X2oPiqScp5DtFHlrUeo3k5Tka+WgYscsXTMJLBEReTCFWa:dE9X2xQFHlrUeo05yDJKCeTNa
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://cajgtus.com/test1/get.php

Attributes

extension
.watz
offline_id
Lc3VTezPWbMhuVAQFzJUdeA68PwI7UDpc5aKHYt1
payload_url
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/abe121434ad837dd5bdd03878a14485820240531135509/34284d 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: 0874PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral2/memory/5016-2-0x0000000003EB0000-0x0000000003FCB000-memory.dmp	family_djvu
behavioral2/memory/4420-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4420-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4420-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4420-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4420-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4876-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4876-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4876-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4876-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4876-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4876-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4876-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4876-41-0x0000000000400000-0x0000000000537000-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
1380	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-1-5-21-1453213197-474736321-1741884505-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\4015d79c-a56c-4112-b08e-91ec33a5f52c\\3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe\" --AutoStart"	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.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
10	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 5016 set thread context of 4420	5016	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	71
PID 1400 set thread context of 4876	1400	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	75

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
4420	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe
4420	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe
4876	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe
4876	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 5016 wrote to memory of 4420	5016	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	71
PID 5016 wrote to memory of 4420	5016	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	71
PID 5016 wrote to memory of 4420	5016	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	71
PID 5016 wrote to memory of 4420	5016	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	71
PID 5016 wrote to memory of 4420	5016	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	71
PID 5016 wrote to memory of 4420	5016	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	71
PID 5016 wrote to memory of 4420	5016	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	71
PID 5016 wrote to memory of 4420	5016	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	71
PID 5016 wrote to memory of 4420	5016	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	71
PID 5016 wrote to memory of 4420	5016	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	71
PID 4420 wrote to memory of 1380	4420	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	72
PID 4420 wrote to memory of 1380	4420	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	72
PID 4420 wrote to memory of 1380	4420	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	72
PID 4420 wrote to memory of 1400	4420	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	73
PID 4420 wrote to memory of 1400	4420	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	73
PID 4420 wrote to memory of 1400	4420	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	73
PID 1400 wrote to memory of 4876	1400	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	75
PID 1400 wrote to memory of 4876	1400	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	75
PID 1400 wrote to memory of 4876	1400	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	75
PID 1400 wrote to memory of 4876	1400	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	75
PID 1400 wrote to memory of 4876	1400	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	75
PID 1400 wrote to memory of 4876	1400	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	75
PID 1400 wrote to memory of 4876	1400	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	75
PID 1400 wrote to memory of 4876	1400	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	75
PID 1400 wrote to memory of 4876	1400	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	75
PID 1400 wrote to memory of 4876	1400	3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe	75

C:\Users\Admin\AppData\Local\Temp\3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe
"C:\Users\Admin\AppData\Local\Temp\3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5016
- C:\Users\Admin\AppData\Local\Temp\3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe
  "C:\Users\Admin\AppData\Local\Temp\3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4420
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\4015d79c-a56c-4112-b08e-91ec33a5f52c" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1380
- - C:\Users\Admin\AppData\Local\Temp\3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe
    "C:\Users\Admin\AppData\Local\Temp\3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1400
  - - C:\Users\Admin\AppData\Local\Temp\3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe
      "C:\Users\Admin\AppData\Local\Temp\3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4876

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

8B2B9A00839EED1DFDCCC3BFC2F5DF12

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12
Size 1KB
SHA256 33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f
MD5 7fb5fa1534dcf77f2125b2403b30a0ee
SHA1 365d96812a69ac0a4611ea4b70a3f306576cc3ea
SHA512 a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e
MD5 SHA1 SHA512

Submit Download

B46811C17859FFB409CF0E904A4AA8F8

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8
Size 436B
SHA256 5ba8817f13eee00e75158bad93076ab474a068c6b52686579e0f728fda68499f
MD5 1bfe0a81db078ea084ff82fe545176fe
SHA1 50b116f578bd272922fa8eae94f7b02fd3b88384
SHA512 37c582f3f09f8d80529608c09041295d1644bcc9de6fb8c4669b05339b0dd870f9525abc5eed53ad06a94b51441275504bc943c336c5beb63b53460ba836ca8d
MD5 SHA1 SHA512

Submit Download

8B2B9A00839EED1DFDCCC3BFC2F5DF12

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12
Size 174B
SHA256 5ddece2ba1a7f0a2e3520a9a8e06338b29f806218f5d9c390dcefed974ee253d
MD5 907a64764a0ce0f11a8ec697428aa137
SHA1 b0430b4495dfbe40f65fa4d2b1111829cdcfb509
SHA512 a6ed2f58b6531ff7370c199b38b8b0731f3fc2e794ff75c15ca1d1343e27c0ae53fdc5e2e0cc639d6fcc7c1b6d2caa62e7db506c36b3f6dbf8fec448754b6238
MD5 SHA1 SHA512

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B46811C17859FFB409CF0E904A4AA8F8

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8
Size 170B
SHA256 7fc6d6d4c3a8bfe9cc5ef1b4fcdc12785e0d128818395cad2ca987293bfab7bc
MD5 35f338f3039fce04c825e4f6ffdb551a
SHA1 b4772994df5369612ddd0cef52680eb8d7b8d74e
SHA512 c8b6b57d84ca4fec621fbf0819ab5ca226e1dd565f540887d83f23d42e00b6b7443aee05f5566399b534ff54c62b3bf54c966190a1547b5dc8fe407eee66df83
MD5 SHA1 SHA512

Submit Download

3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe

Path C:\Users\Admin\AppData\Local\4015d79c-a56c-4112-b08e-91ec33a5f52c\3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5.exe
Size 700KB
SHA256 3e1c44e85fb5fe2fbbd707e66526afdc836d1c777b0f388db6f837a4db1f4dc5
MD5 4a585e95952179e7dd63e217ff8d5775
SHA1 0f665e71484876acf2db54714ab910f889741d8a
SHA512 17addcbce4515ee0e1f0ca78d4a39110d15f9efb68128d65dab1ce2c2a6b80525abf40aec7a59aee5e2556917ea0b66df1ad9801eec4085b9f422f9eceaad33d
SSDEEP 12288:j6+LE9X2oPiqScp5DtFHlrUeo3k5Tka+WgYscsXTMJLBEReTCFWa:dE9X2xQFHlrUeo05yDJKCeTNa
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/4420-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4420-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4420-21-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4420-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4420-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4876-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4876-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4876-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4876-33-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4876-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4876-40-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4876-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4876-41-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5016-2-0x0000000003EB0000-0x0000000003FCB000-memory.dmp

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memory/5016-1-0x0000000003E10000-0x0000000003EA7000-memory.dmp

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