djvu | 7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f

Resubmissions

30/04/2024, 19:58

240430-yqa4hseh3z10

30/04/2024, 19:56

240430-yn7dyagf3510

30/04/2024, 19:41

240430-yd39jaef7t10

Analysis

max time kernel
144s
max time network
93s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
30/04/2024, 19:41

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Report Analysis Logs

General

Target
7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe
Size 764KB
Sample240430-yd39jaef7t
SHA256 7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f
MD5 4228118913227d8fb25ce46d81094e9a
SHA1 8e5766e90af41f4f55388a86d7d2ce5903cf66aa
SHA512 1ca979023b84da8399d5a579fdbaafb966d68b3f15e097a42ceadd04752c7a01f63c515586cecf24116e4c676bf0d1961c8f6471ad6c650e4c7ac16f11252b89
SSDEEP 12288:78cLfIFOCpbTLbVpu8zE/ZGJUKv6BkqVFH8gyM5TJBxGEDp0K1XPH2F2D9EEgt:7GFOqbhpg/UUO658gN5FBkEDp/1fWs9w
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.bgjs
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: 0863PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 16 IoCs

resource	yara_rule
behavioral2/memory/4516-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4516-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4516-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4516-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4188-4-0x0000000003830000-0x000000000394B000-memory.dmp	family_djvu
behavioral2/memory/4516-12-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1336-16-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1336-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1336-18-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1336-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1336-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1336-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1336-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1336-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1336-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1336-32-0x0000000000400000-0x0000000000537000-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
4564	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\\e2fe3439-233b-438c-b5f9-15d14aeabadf\\7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe\" --AutoStart"	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
1	api.2ip.ua
5	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4188 set thread context of 4516	4188	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	80
PID 1764 set thread context of 1336	1764	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.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
4516	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe
4516	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe
1336	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe
1336	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4188 wrote to memory of 4516	4188	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	80
PID 4188 wrote to memory of 4516	4188	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	80
PID 4188 wrote to memory of 4516	4188	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	80
PID 4188 wrote to memory of 4516	4188	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	80
PID 4188 wrote to memory of 4516	4188	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	80
PID 4188 wrote to memory of 4516	4188	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	80
PID 4188 wrote to memory of 4516	4188	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	80
PID 4188 wrote to memory of 4516	4188	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	80
PID 4188 wrote to memory of 4516	4188	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	80
PID 4188 wrote to memory of 4516	4188	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	80
PID 4516 wrote to memory of 4564	4516	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	82
PID 4516 wrote to memory of 4564	4516	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	82
PID 4516 wrote to memory of 4564	4516	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	82
PID 4516 wrote to memory of 1764	4516	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	83
PID 4516 wrote to memory of 1764	4516	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	83
PID 4516 wrote to memory of 1764	4516	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	83
PID 1764 wrote to memory of 1336	1764	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	86
PID 1764 wrote to memory of 1336	1764	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	86
PID 1764 wrote to memory of 1336	1764	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	86
PID 1764 wrote to memory of 1336	1764	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	86
PID 1764 wrote to memory of 1336	1764	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	86
PID 1764 wrote to memory of 1336	1764	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	86
PID 1764 wrote to memory of 1336	1764	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	86
PID 1764 wrote to memory of 1336	1764	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	86
PID 1764 wrote to memory of 1336	1764	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	86
PID 1764 wrote to memory of 1336	1764	7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe	86

C:\Users\Admin\AppData\Local\Temp\7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe
"C:\Users\Admin\AppData\Local\Temp\7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4188
- C:\Users\Admin\AppData\Local\Temp\7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe
  "C:\Users\Admin\AppData\Local\Temp\7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4516
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\e2fe3439-233b-438c-b5f9-15d14aeabadf" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4564
- - C:\Users\Admin\AppData\Local\Temp\7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe
    "C:\Users\Admin\AppData\Local\Temp\7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1764
  - - C:\Users\Admin\AppData\Local\Temp\7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe
      "C:\Users\Admin\AppData\Local\Temp\7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1336

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

7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe

Path C:\Users\Admin\AppData\Local\e2fe3439-233b-438c-b5f9-15d14aeabadf\7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f.exe
Size 764KB
SHA256 7993a47c75e6949eebd1d81fe1461a9ef1958d35a1cabc6840a924664511aa3f
MD5 4228118913227d8fb25ce46d81094e9a
SHA1 8e5766e90af41f4f55388a86d7d2ce5903cf66aa
SHA512 1ca979023b84da8399d5a579fdbaafb966d68b3f15e097a42ceadd04752c7a01f63c515586cecf24116e4c676bf0d1961c8f6471ad6c650e4c7ac16f11252b89
SSDEEP 12288:78cLfIFOCpbTLbVpu8zE/ZGJUKv6BkqVFH8gyM5TJBxGEDp0K1XPH2F2D9EEgt:7GFOqbhpg/UUO658gN5FBkEDp/1fWs9w
MD5 SHA1 SHA512 SSDEEP

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memory/1336-18-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1336-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1336-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1336-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1336-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1336-26-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1336-20-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1336-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1336-16-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1336-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1764-14-0x0000000001DE0000-0x0000000001E7E000-memory.dmp

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memory/4188-1-0x0000000001D70000-0x0000000001E07000-memory.dmp

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memory/4188-4-0x0000000003830000-0x000000000394B000-memory.dmp

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memory/4516-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4516-12-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4516-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4516-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4516-6-0x0000000000400000-0x0000000000537000-memory.dmp

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