djvu | 6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b

Analysis

max time kernel
297s
max time network
298s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
09/05/2024, 23:04

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General

Target
6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe
Size 773KB
Sample240509-22esmafb89
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/2900-2-0x00000000037C0000-0x00000000038DB000-memory.dmp	family_djvu
behavioral2/memory/3972-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3972-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3972-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3972-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3972-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4744-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4744-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4744-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4744-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4744-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4744-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4744-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4744-36-0x0000000000400000-0x0000000000537000-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
4468	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-1-5-21-1739856679-3467441365-73334005-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\60cc0aa7-f08f-411f-a054-4e38bec364ff\\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
10	api.2ip.ua
1	api.2ip.ua
2	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2900 set thread context of 3972	2900	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	73
PID 4800 set thread context of 4744	4800	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	77

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
3972	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe
3972	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe
4744	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe
4744	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2900 wrote to memory of 3972	2900	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	73
PID 2900 wrote to memory of 3972	2900	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	73
PID 2900 wrote to memory of 3972	2900	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	73
PID 2900 wrote to memory of 3972	2900	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	73
PID 2900 wrote to memory of 3972	2900	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	73
PID 2900 wrote to memory of 3972	2900	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	73
PID 2900 wrote to memory of 3972	2900	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	73
PID 2900 wrote to memory of 3972	2900	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	73
PID 2900 wrote to memory of 3972	2900	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	73
PID 2900 wrote to memory of 3972	2900	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	73
PID 3972 wrote to memory of 4468	3972	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	74
PID 3972 wrote to memory of 4468	3972	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	74
PID 3972 wrote to memory of 4468	3972	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	74
PID 3972 wrote to memory of 4800	3972	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	75
PID 3972 wrote to memory of 4800	3972	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	75
PID 3972 wrote to memory of 4800	3972	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	75
PID 4800 wrote to memory of 4744	4800	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	77
PID 4800 wrote to memory of 4744	4800	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	77
PID 4800 wrote to memory of 4744	4800	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	77
PID 4800 wrote to memory of 4744	4800	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	77
PID 4800 wrote to memory of 4744	4800	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	77
PID 4800 wrote to memory of 4744	4800	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	77
PID 4800 wrote to memory of 4744	4800	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	77
PID 4800 wrote to memory of 4744	4800	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	77
PID 4800 wrote to memory of 4744	4800	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	77
PID 4800 wrote to memory of 4744	4800	6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe	77

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:2900
- 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:3972
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\60cc0aa7-f08f-411f-a054-4e38bec364ff" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4468
- - 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:4800
  - - C:\Users\Admin\AppData\Local\Temp\6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe
      "C:\Users\Admin\AppData\Local\Temp\6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4744

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 b50c616b5c29bd9611ed360a238b6b6c421d0fe3b85df331e4951aefab526b2e
MD5 5857aff0ea0365561d0f06769a04101c
SHA1 0ac570f0ec93618c5849baf94c0a167e4a706a95
SHA512 1863b40407893a4a26beaa7ae4add199676c15b633d59afb4dfd2906328b29497fdddcb0ff01b9ba77ac59c5c55511fa669b0ffd6e02bcfa2d2cc53df62390be
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

Submit Download

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 d98f9be26c683d94a7a3c8842cec32414ae6db4e4aa737f7eee150f32fd39dd4
MD5 dd7135d278c3cd3e3a735c0bdd36f6d4
SHA1 965771e3e8de2dcd14c8f3566ca04df882f7f80d
SHA512 5c7edee7420ef398ad6537fada5daf799b89ac5dcb8b85c42c569e2a9c371e43050d8979378b2ecf372f27d29375090f47e0730213e3155c72d58754babb4d46
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 de7fe30f64ad00506de8c977ee15d8fc41da27eb72697286b23005604973d7b4
MD5 1d190b1883e3ac4dd095eef245ffcc36
SHA1 88e9c1b32b74ef6b5e1fa761111a8c220336e216
SHA512 6c4521d119ca3237d6265764595b749d5d6637fb3ee9417d6a869eb6efc563cf6173708ca920762668f8da84948740e30ab6924b12003634a97d89fcd944482f
MD5 SHA1 SHA512

Submit Download

6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe

Path C:\Users\Admin\AppData\Local\60cc0aa7-f08f-411f-a054-4e38bec364ff\6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b.exe
Size 773KB
SHA256 6d8e3926431714aa890fa00135a009505c2699167f8cf24554bb9cffe4060e3b
MD5 6d59b0fdf7f7b72f5e1d38276aea3afc
SHA1 202ec8a2c5523797c06f50562bfdcd5e7394aec5
SHA512 454943538f7d92a23e9a265e458b97ea277cae2590b0ecb7669eaee3e403c8734ff1c06cc286c89bc727548f5d2bb9ee2a107aedeedc6a741b4212a850469c8a
SSDEEP 12288:KlZlK/mrQmWIETVcCIrRWW6bDFpaFWP4qXDAEu0GXlDLA0EPBAk6MRtykGk:yyIETCVWWqRM7ukP9LLEPBGMRtyTk
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2900-2-0x00000000037C0000-0x00000000038DB000-memory.dmp

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memory/2900-1-0x0000000003710000-0x00000000037B1000-memory.dmp

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memory/3972-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3972-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3972-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3972-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3972-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4744-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4744-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4744-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4744-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4744-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4744-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4744-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4744-36-0x0000000000400000-0x0000000000537000-memory.dmp

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