djvu | 6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b

Analysis

max time kernel
294s
max time network
255s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
07/05/2024, 23:05

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General

Target
6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe
Size 773KB
Sample240507-223vfsdb2x
SHA256 6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b
MD5 6d59b0fdf7f7b72f5e1d38276aea3afc
SHA1 202ec8a2c5523797c06f50562bfdcd5e7394aec5
SHA512 454943538f7d92a23e9a265e458b97ea277cae2590b0ecb7669eaee3e403c8734ff1c06cc286c89bc727548f5d2bb9ee2a107aedeedc6a741b4212a850469c8a
SSDEEP 12288:KlZlK/mrQmWIETVcCIrRWW6bDFpaFWP4qXDAEu0GXlDLA0EPBAk6MRtykGk:yyIETCVWWqRM7ukP9LLEPBGMRtyTk
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.qepi
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: 0867PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral2/memory/5000-2-0x0000000003730000-0x000000000384B000-memory.dmp	family_djvu
behavioral2/memory/3012-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3012-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3012-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3012-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3012-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1764-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1764-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1764-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1764-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1764-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1764-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1764-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1764-36-0x0000000000400000-0x0000000000537000-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
4700	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-1-5-21-3699363923-1875576828-3287151903-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\9856273b-a0f5-4b57-8055-a2145bfc806d\\6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe\" --AutoStart"	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.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 5000 set thread context of 3012	5000	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	75
PID 5088 set thread context of 1764	5088	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	79

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
3012	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe
3012	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe
1764	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe
1764	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 5000 wrote to memory of 3012	5000	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	75
PID 5000 wrote to memory of 3012	5000	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	75
PID 5000 wrote to memory of 3012	5000	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	75
PID 5000 wrote to memory of 3012	5000	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	75
PID 5000 wrote to memory of 3012	5000	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	75
PID 5000 wrote to memory of 3012	5000	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	75
PID 5000 wrote to memory of 3012	5000	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	75
PID 5000 wrote to memory of 3012	5000	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	75
PID 5000 wrote to memory of 3012	5000	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	75
PID 5000 wrote to memory of 3012	5000	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	75
PID 3012 wrote to memory of 4700	3012	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	76
PID 3012 wrote to memory of 4700	3012	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	76
PID 3012 wrote to memory of 4700	3012	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	76
PID 3012 wrote to memory of 5088	3012	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	77
PID 3012 wrote to memory of 5088	3012	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	77
PID 3012 wrote to memory of 5088	3012	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	77
PID 5088 wrote to memory of 1764	5088	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	79
PID 5088 wrote to memory of 1764	5088	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	79
PID 5088 wrote to memory of 1764	5088	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	79
PID 5088 wrote to memory of 1764	5088	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	79
PID 5088 wrote to memory of 1764	5088	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	79
PID 5088 wrote to memory of 1764	5088	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	79
PID 5088 wrote to memory of 1764	5088	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	79
PID 5088 wrote to memory of 1764	5088	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	79
PID 5088 wrote to memory of 1764	5088	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	79
PID 5088 wrote to memory of 1764	5088	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	79

C:\Users\Admin\AppData\Local\Temp\6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe
"C:\Users\Admin\AppData\Local\Temp\6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5000
- C:\Users\Admin\AppData\Local\Temp\6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe
  "C:\Users\Admin\AppData\Local\Temp\6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3012
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\9856273b-a0f5-4b57-8055-a2145bfc806d" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4700
- - C:\Users\Admin\AppData\Local\Temp\6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe
    "C:\Users\Admin\AppData\Local\Temp\6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:5088
  - - C:\Users\Admin\AppData\Local\Temp\6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe
      "C:\Users\Admin\AppData\Local\Temp\6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1764

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 26f7df2742be7eae0cecb3954ab69d2f1ad25c6b63a21e3a477ea34dee8301ae
MD5 af14424bd91fa356e225129fe451aacc
SHA1 4046dc95051bf8382196ff1fec36326c22dc1aae
SHA512 362068ce189ee00c318b574ebc8fc4f2e09add21f6c79aea8fe2f69ece44c0beaeb6c7fec7297a0b758ea5b8879ab0e9993c74ab262e200e289c05833e734179
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 4d08dcd95ae667cb8a52a4edb6d1368ed842f186cb67838f379c22d6b0859c15
MD5 62ff99deeced99180d33051be236a71d
SHA1 d5f84ea43341037fd5438db11208b9cc5d38c603
SHA512 a4928aa0cf1b5e18194e7ed4a74a912a69f4ca4e3e09e603d56b98ae7c77cdfbb1c110c59f4f6997e2ce25740705b32c32384697403525139fe13eb068aaf3e4
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 b29415894f26c4430e17f08e2292c8d230013b26f761c3d4032377c7faee0c47
MD5 20abcb3fd11e31679fe2e9ee673ab0ee
SHA1 1fdb35f6d19141a67f933174e068a607de02b35f
SHA512 3a0636bc1182ffbc21b742a8a7ab299d2c20aed2bdebf758001200127a79c182ff786948157bbdee9565f57a077422e14dcd9e3bcb910c319f2172d829e1e923
MD5 SHA1 SHA512

Submit Download

6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe

Path C:\Users\Admin\AppData\Local\9856273b-a0f5-4b57-8055-a2145bfc806d\6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe
Size 773KB
SHA256 6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b
MD5 6d59b0fdf7f7b72f5e1d38276aea3afc
SHA1 202ec8a2c5523797c06f50562bfdcd5e7394aec5
SHA512 454943538f7d92a23e9a265e458b97ea277cae2590b0ecb7669eaee3e403c8734ff1c06cc286c89bc727548f5d2bb9ee2a107aedeedc6a741b4212a850469c8a
SSDEEP 12288:KlZlK/mrQmWIETVcCIrRWW6bDFpaFWP4qXDAEu0GXlDLA0EPBAk6MRtykGk:yyIETCVWWqRM7ukP9LLEPBGMRtyTk
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1764-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1764-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1764-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1764-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1764-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1764-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1764-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1764-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3012-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3012-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3012-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3012-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3012-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5000-2-0x0000000003730000-0x000000000384B000-memory.dmp

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memory/5000-1-0x0000000003690000-0x000000000372C000-memory.dmp

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