djvu | 4f9af410240401ada8d2eee48baf81dd7c33e990d7927fa1d456533cbfb37c6e

General

Target

file.exe
Size

814KB
MD5

7265daee89e587ef7bfae3359391c6de
SHA1

918a6401d39ddcea8a9f34c37715deddf0e206ee
SHA256

4f9af410240401ada8d2eee48baf81dd7c33e990d7927fa1d456533cbfb37c6e
SHA512

b568c459eea4df96d0ca6f6e15f88c8267aa8a2ed4646e5704f3c14217ed8609106b87b9534d1a56b775af45592d92f41f935712e7808f4e3aea201e17fcc18a
SSDEEP

12288:XroYw+GVNfSQwgQWJeYldTogJGKDcX7kbpQW6tBxU2Vke7qs4vtP/XDVcM41:7ovFSQnICntcAwrU2b+13DVh4

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.veza
offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
payload_url
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 16 IoCs

resource	yara_rule
behavioral2/memory/3868-2-0x0000000004A00000-0x0000000004B1B000-memory.dmp	family_djvu
behavioral2/memory/3728-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3728-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3728-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3728-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3728-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4864-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4864-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4864-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4864-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4864-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4864-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4864-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4864-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4864-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4864-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	file.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3240	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-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c946dcdd-003c-444f-8f25-a63986055a94\\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
6	api.2ip.ua
7	api.2ip.ua
17	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3868 set thread context of 3728	3868	file.exe	84
PID 2164 set thread context of 4864	2164	file.exe	91

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
3728	file.exe
3728	file.exe
4864	file.exe
4864	file.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3868 wrote to memory of 3728	3868	file.exe	84
PID 3868 wrote to memory of 3728	3868	file.exe	84
PID 3868 wrote to memory of 3728	3868	file.exe	84
PID 3868 wrote to memory of 3728	3868	file.exe	84
PID 3868 wrote to memory of 3728	3868	file.exe	84
PID 3868 wrote to memory of 3728	3868	file.exe	84
PID 3868 wrote to memory of 3728	3868	file.exe	84
PID 3868 wrote to memory of 3728	3868	file.exe	84
PID 3868 wrote to memory of 3728	3868	file.exe	84
PID 3868 wrote to memory of 3728	3868	file.exe	84
PID 3728 wrote to memory of 3240	3728	file.exe	87
PID 3728 wrote to memory of 3240	3728	file.exe	87
PID 3728 wrote to memory of 3240	3728	file.exe	87
PID 3728 wrote to memory of 2164	3728	file.exe	89
PID 3728 wrote to memory of 2164	3728	file.exe	89
PID 3728 wrote to memory of 2164	3728	file.exe	89
PID 2164 wrote to memory of 4864	2164	file.exe	91
PID 2164 wrote to memory of 4864	2164	file.exe	91
PID 2164 wrote to memory of 4864	2164	file.exe	91
PID 2164 wrote to memory of 4864	2164	file.exe	91
PID 2164 wrote to memory of 4864	2164	file.exe	91
PID 2164 wrote to memory of 4864	2164	file.exe	91
PID 2164 wrote to memory of 4864	2164	file.exe	91
PID 2164 wrote to memory of 4864	2164	file.exe	91
PID 2164 wrote to memory of 4864	2164	file.exe	91
PID 2164 wrote to memory of 4864	2164	file.exe	91

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:3868
- C:\Users\Admin\AppData\Local\Temp\file.exe
  "C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3728
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\c946dcdd-003c-444f-8f25-a63986055a94" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3240
- - 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:2164
  - - C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4864

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

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
489a89b0a557696c6e623ab2079b74f7

SHA1
8775908130d6c010958c9ed6618e81708a17e411

SHA256
38185bd55754c319f0e381646cac1a4aeea31ee9a58ce47badc48df019b129d9

SHA512
01af148c30a65ffa93e68741d3a71a6c5e59842cb328c426cd4661aeb7cc756452309feb54fbcd46efaeffb1fb060ec7858511ea16be7c8df255f24cff2e7a62

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
888548ccf929b94ba425ec5df1c551c9

SHA1
c0fefabfed570c6782c5394520e8a2011da381e5

SHA256
0b00138e1dae3fde3bb246795d289ee12ab7853f32fa7905658d064bbf10c918

SHA512
ffb7817f06e537e7dcf94a2cbc1dea5eeb9d538e9b19188f2d424959bdb6cc7399eb718a2d24e994ea80ea2a8d243b8f46b20cc74553361ba89bbdb320aec0a0

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

Filesize
392B

MD5
7a312189001b646fb9d64744c985c877

SHA1
05ba83eec1a7123fa77cd7c03b175de8b955f200

SHA256
0326b237f5501ec6bdf25549c57d67e9783c083b2c5dd4f0766ac65c678cece8

SHA512
bd3ae6c42accd0051fbd199723969863ae047b113e2a8ddc27b7545226dd41ad2bcabf1676aff2f49ba524d0d52c6ccc756ce983963193f07a026afe84a887f4

Download Submit
C:\Users\Admin\AppData\Local\c946dcdd-003c-444f-8f25-a63986055a94\file.exe

Filesize
814KB

MD5
7265daee89e587ef7bfae3359391c6de

SHA1
918a6401d39ddcea8a9f34c37715deddf0e206ee

SHA256
4f9af410240401ada8d2eee48baf81dd7c33e990d7927fa1d456533cbfb37c6e

SHA512
b568c459eea4df96d0ca6f6e15f88c8267aa8a2ed4646e5704f3c14217ed8609106b87b9534d1a56b775af45592d92f41f935712e7808f4e3aea201e17fcc18a

Download Submit
memory/3728-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3728-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3728-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3728-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3728-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3868-2-0x0000000004A00000-0x0000000004B1B000-memory.dmp

Filesize
1.1MB

Download
memory/3868-1-0x0000000004960000-0x00000000049F9000-memory.dmp

Filesize
612KB

Download
memory/4864-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4864-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4864-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4864-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4864-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4864-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4864-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4864-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4864-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4864-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads