djvu | 1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe

Analysis

max time kernel
145s
max time network
123s
platform
windows11-21h2_x64
resource
win11-20240709-en
resource tags

arch:x64arch:x86image:win11-20240709-enlocale:en-usos:windows11-21h2-x64system
submitted
17/07/2024, 07:00

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General

Target
1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe
Size 748KB
Sample240717-hszxnashpc
SHA256 1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe
MD5 12a3a6f7b22079f15c8c9bc9bcb9d42e
SHA1 5cbc6f8d4bfb9d97d0290122427c73742799718c
SHA512 2b86ccc4cb91ae3b22d2f5ce482e9124ec4cf0c4037927e8b4786c28beac813a7bf565a42682ea35125dcc9c4a62d6a186e9dde485fcfc02fb51f303ef18bf87
SSDEEP 12288:/csUEyLXtvFWrnPxKUOEU/PDUyO+sAwyUwr7Gxz4x7L5nc:RULdsrnEUOEEPDy+sjI6x0JL5c
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.qual
offline_id
KLbRmn6on3AXGFgDLGtd0IkHmV7uHw9VxlcxO5t1
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. 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: 0876qual

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 16 IoCs

resource	yara_rule
behavioral2/memory/1136-2-0x0000000004030000-0x000000000414B000-memory.dmp	family_djvu
behavioral2/memory/3108-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3108-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3108-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3108-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3108-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/216-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/216-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/216-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/216-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/216-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/216-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/216-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/216-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/216-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/216-40-0x0000000000400000-0x0000000000537000-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
2352	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-1-5-21-1210443139-7911939-2760828654-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\b5ec0971-d609-490a-b4b2-d98b30ce26d0\\1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe\" --AutoStart"	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.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
7	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1136 set thread context of 3108	1136	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	82
PID 3692 set thread context of 216	3692	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	87

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
3108	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe
3108	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe
216	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe
216	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1136 wrote to memory of 3108	1136	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	82
PID 1136 wrote to memory of 3108	1136	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	82
PID 1136 wrote to memory of 3108	1136	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	82
PID 1136 wrote to memory of 3108	1136	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	82
PID 1136 wrote to memory of 3108	1136	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	82
PID 1136 wrote to memory of 3108	1136	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	82
PID 1136 wrote to memory of 3108	1136	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	82
PID 1136 wrote to memory of 3108	1136	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	82
PID 1136 wrote to memory of 3108	1136	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	82
PID 1136 wrote to memory of 3108	1136	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	82
PID 3108 wrote to memory of 2352	3108	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	83
PID 3108 wrote to memory of 2352	3108	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	83
PID 3108 wrote to memory of 2352	3108	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	83
PID 3108 wrote to memory of 3692	3108	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	84
PID 3108 wrote to memory of 3692	3108	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	84
PID 3108 wrote to memory of 3692	3108	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	84
PID 3692 wrote to memory of 216	3692	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	87
PID 3692 wrote to memory of 216	3692	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	87
PID 3692 wrote to memory of 216	3692	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	87
PID 3692 wrote to memory of 216	3692	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	87
PID 3692 wrote to memory of 216	3692	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	87
PID 3692 wrote to memory of 216	3692	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	87
PID 3692 wrote to memory of 216	3692	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	87
PID 3692 wrote to memory of 216	3692	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	87
PID 3692 wrote to memory of 216	3692	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	87
PID 3692 wrote to memory of 216	3692	1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe	87

C:\Users\Admin\AppData\Local\Temp\1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe
"C:\Users\Admin\AppData\Local\Temp\1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1136
- C:\Users\Admin\AppData\Local\Temp\1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe
  "C:\Users\Admin\AppData\Local\Temp\1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3108
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\b5ec0971-d609-490a-b4b2-d98b30ce26d0" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2352
- - C:\Users\Admin\AppData\Local\Temp\1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe
    "C:\Users\Admin\AppData\Local\Temp\1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3692
  - - C:\Users\Admin\AppData\Local\Temp\1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe
      "C:\Users\Admin\AppData\Local\Temp\1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:216

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

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8B2B9A00839EED1DFDCCC3BFC2F5DF12

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12
Size 174B
SHA256 b5e7dbe2723794b123726224b940e0dd11d7a184d89f35485f1b2c8df480e2e0
MD5 d906a1d81ee89c4e5ebc8bb0f178a21b
SHA1 5aaa6138adad2bbd9e1435f3f2f5affd03978955
SHA512 0b6320becdee5801e3475c188db105aea6026d61d2697fdd3b52bf0769b855c338f4b5142ae0820ae2715f5687e6f3a7238cc4f578d8de019af8e4eb566b855e
MD5 SHA1 SHA512

Submit Download

B46811C17859FFB409CF0E904A4AA8F8

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8
Size 170B
SHA256 d0497f80f8025e0c69ae0a070a855929c12ea4ca818750adba4ed2c6e7129f28
MD5 4bdd2035d6370de46959ac395236a13a
SHA1 abeda2058058087bfe9e5ae8cdb8f3edd2630457
SHA512 3c2940ca204f4cb60562be8511bc85de22cdf0a593029d126ef8ba462abe2d91e2ee86cee33a77b75e4e9e472c247b9bbe274646e279f2c6a740a6c611e5809b
MD5 SHA1 SHA512

Submit Download

1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe

Path C:\Users\Admin\AppData\Local\b5ec0971-d609-490a-b4b2-d98b30ce26d0\1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe.exe
Size 748KB
SHA256 1a528249f9ab6f9e2703da296f30b990e3b3b73edccc52be34eabd22959e4dbe
MD5 12a3a6f7b22079f15c8c9bc9bcb9d42e
SHA1 5cbc6f8d4bfb9d97d0290122427c73742799718c
SHA512 2b86ccc4cb91ae3b22d2f5ce482e9124ec4cf0c4037927e8b4786c28beac813a7bf565a42682ea35125dcc9c4a62d6a186e9dde485fcfc02fb51f303ef18bf87
SSDEEP 12288:/csUEyLXtvFWrnPxKUOEU/PDUyO+sAwyUwr7Gxz4x7L5nc:RULdsrnEUOEEPDy+sjI6x0JL5c
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/216-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/216-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/216-40-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/216-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/216-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/216-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/216-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/216-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/216-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/216-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1136-1-0x0000000003F80000-0x000000000401C000-memory.dmp

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memory/1136-2-0x0000000004030000-0x000000000414B000-memory.dmp

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memory/3108-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3108-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3108-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3108-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3108-19-0x0000000000400000-0x0000000000537000-memory.dmp

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