djvu | 7a73364757e45002142e0cd2ae8a5541caf371027239afadae565e852f0bb026

Analysis

max time kernel
148s
max time network
125s
platform
windows7_x64
resource
win7-20231020-en
resource tags

arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
submitted
23/11/2023, 14:37

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General

Target

file.exe
Size

785KB
MD5

4ed704febaafefe33af1d3b4b994ec46
SHA1

488b034dbdda0197f0fa95ebfbb3eb9ff9652ecb
SHA256

7a73364757e45002142e0cd2ae8a5541caf371027239afadae565e852f0bb026
SHA512

120c180bfcd2072613bf6bfb285468b6e7c887fab3ad81b7fd5b2a98303cd4c7186cee931f22861a2e81f854622a93a4e64ed69f15dfaf4a8db8f781929b4f82
SSDEEP

12288:MNGs/DUwn7d56lXCxOI5BzH4aBvBCwLuSdP2mkI/8fRKg5cDrDI0:WJnx2XsBjX4wLv3khQgaDrDI0

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://zexeq.com/test2/get.php

Attributes

extension
.gyza
offline_id
nN1rRlTxKTPo66pmJEAHwufZ2Dhz4MsNxIlOk6t1
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. You can get and look video overview decrypt tool: https://we.tl/t-CDZ4hMgp2X Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. 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: 0828ASdw

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral1/memory/2968-3-0x00000000009F0000-0x0000000000B0B000-memory.dmp	family_djvu
behavioral1/memory/2192-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2192-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2192-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2192-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2528-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2528-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2528-50-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2528-48-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2528-54-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2528-56-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2528-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2528-58-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2528-59-0x0000000000400000-0x0000000000537000-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
2780	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-1-5-21-2952504676-3105837840-1406404655-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\dcec5419-edc5-46b2-8f2a-0909620862d0\\file.exe\" --AutoStart"	file.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
3	api.2ip.ua
4	api.2ip.ua
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2968 set thread context of 2192	2968	file.exe	28
PID 2872 set thread context of 2528	2872	file.exe	31

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2192	file.exe
2528	file.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2968 wrote to memory of 2192	2968	file.exe	28
PID 2968 wrote to memory of 2192	2968	file.exe	28
PID 2968 wrote to memory of 2192	2968	file.exe	28
PID 2968 wrote to memory of 2192	2968	file.exe	28
PID 2968 wrote to memory of 2192	2968	file.exe	28
PID 2968 wrote to memory of 2192	2968	file.exe	28
PID 2968 wrote to memory of 2192	2968	file.exe	28
PID 2968 wrote to memory of 2192	2968	file.exe	28
PID 2968 wrote to memory of 2192	2968	file.exe	28
PID 2968 wrote to memory of 2192	2968	file.exe	28
PID 2968 wrote to memory of 2192	2968	file.exe	28
PID 2192 wrote to memory of 2780	2192	file.exe	29
PID 2192 wrote to memory of 2780	2192	file.exe	29
PID 2192 wrote to memory of 2780	2192	file.exe	29
PID 2192 wrote to memory of 2780	2192	file.exe	29
PID 2192 wrote to memory of 2872	2192	file.exe	30
PID 2192 wrote to memory of 2872	2192	file.exe	30
PID 2192 wrote to memory of 2872	2192	file.exe	30
PID 2192 wrote to memory of 2872	2192	file.exe	30
PID 2872 wrote to memory of 2528	2872	file.exe	31
PID 2872 wrote to memory of 2528	2872	file.exe	31
PID 2872 wrote to memory of 2528	2872	file.exe	31
PID 2872 wrote to memory of 2528	2872	file.exe	31
PID 2872 wrote to memory of 2528	2872	file.exe	31
PID 2872 wrote to memory of 2528	2872	file.exe	31
PID 2872 wrote to memory of 2528	2872	file.exe	31
PID 2872 wrote to memory of 2528	2872	file.exe	31
PID 2872 wrote to memory of 2528	2872	file.exe	31
PID 2872 wrote to memory of 2528	2872	file.exe	31
PID 2872 wrote to memory of 2528	2872	file.exe	31

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2968
- C:\Users\Admin\AppData\Local\Temp\file.exe
  "C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2192
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\dcec5419-edc5-46b2-8f2a-0909620862d0" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2780
- - C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2872
  - - C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2528

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

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
1KB

MD5
36728e1925c0a1928fa3ea5c40325e29

SHA1
f0543c10ff3acda3ce66173b568192d2a1ffa5dd

SHA256
489f417a4d7b3ca1858467653ad369ca66fd2b5ba54838d6d9f588bfb693e4b9

SHA512
dcc673c754bdfc8377af1d90131318682d05267c62b5a4d9ca0dcc8f8b21ce2666967f88e3027f46ada012bbc671372d97527c813e6dcd5f242322d5ed036a0a

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
724B

MD5
8202a1cd02e7d69597995cabbe881a12

SHA1
8858d9d934b7aa9330ee73de6c476acf19929ff6

SHA256
58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

SHA512
97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
410B

MD5
79c7775490431d4107d08a1ce4352cbe

SHA1
c8a4eef239bcbaa838cea1986d941ba9492295cb

SHA256
93b5b962ee7f98f6354fc72e04d7fb35246826529d33d83385b80b05d87dc94e

SHA512
44dfc9c980809513d9f136cb325dd38bb012066ca3594896c0baf55c06efd645b8794edf9afde451b16393c3ca3af84521aeba305d1f8f84e1cff882b454df5e

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

Filesize
344B

MD5
e1468bcc5f3d327c689ad2c368be340b

SHA1
a258d8356496e9883fd9d5937c9e9df15bfb37d0

SHA256
4bb42e5b6b1173b0bfdc68c0841dc41f56c096740eb93984b560bd5fb49974aa

SHA512
7861bdf8cb0b0f071cb56501824a29a43e72618355bd5725d0300a41d24a3f4d631139d12db8a8abc6221c52858761740c3d7dfe5a39a85d0475001fd7375d06

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
392B

MD5
c8b96c1cd5d6d883e40ed5151f649669

SHA1
e8877a1b9bb5f3b0ecbeb5cc79e486c09d6b0dfe

SHA256
b3c6d37d342e537f431eea6657d46da7eddfcd490fa383f8908edd9a091d4ffd

SHA512
879d4ef4943e1367378a7e021ea944815460c6f52441f03b47199c63eb2e49cdb5440480f45f4017d98ac2daaa8b2ad9dadf28e441fb8ea4977f08cc179b2116

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab80E3.tmp

Filesize
61KB

MD5
f3441b8572aae8801c04f3060b550443

SHA1
4ef0a35436125d6821831ef36c28ffaf196cda15

SHA256
6720349e7d82ee0a8e73920d3c2b7cb2912d9fcf2edb6fd98f2f12820158b0bf

SHA512
5ba01ba421b50030e380ae6bbcd2f681f2a91947fe7fedb3c8e6b5f24dce9517abf57b1cf26cc6078d4bb53bde6fcfb2561591337c841f8f2cb121a3d71661b9

Download Submit
C:\Users\Admin\AppData\Local\dcec5419-edc5-46b2-8f2a-0909620862d0\file.exe

Filesize
785KB

MD5
4ed704febaafefe33af1d3b4b994ec46

SHA1
488b034dbdda0197f0fa95ebfbb3eb9ff9652ecb

SHA256
7a73364757e45002142e0cd2ae8a5541caf371027239afadae565e852f0bb026

SHA512
120c180bfcd2072613bf6bfb285468b6e7c887fab3ad81b7fd5b2a98303cd4c7186cee931f22861a2e81f854622a93a4e64ed69f15dfaf4a8db8f781929b4f82

Download Submit
memory/2192-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2192-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2192-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2192-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2192-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2528-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2528-56-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2528-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2528-59-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2528-58-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2528-57-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2528-54-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2528-50-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2528-48-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2872-28-0x0000000000220000-0x00000000002B2000-memory.dmp

Filesize
584KB

Download
memory/2872-29-0x0000000000220000-0x00000000002B2000-memory.dmp

Filesize
584KB

Download
memory/2968-1-0x00000000002D0000-0x0000000000362000-memory.dmp

Filesize
584KB

Download
memory/2968-0-0x00000000002D0000-0x0000000000362000-memory.dmp

Filesize
584KB

Download
memory/2968-3-0x00000000009F0000-0x0000000000B0B000-memory.dmp

Filesize
1.1MB

Download