djvu | 9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec

Analysis

max time kernel
143s
max time network
123s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
25/05/2024, 19:12

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General

Target
9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe
Size 733KB
Sample240525-xwp9ysfd28
SHA256 9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec
MD5 3eedc2ae680453b8ca3b23fd15f529a7
SHA1 4b1cb1070c23bea1abde90a6329cbf45059e8ae4
SHA512 e9075b16347404b61df5698bb055284f94f686ed318ea6f71b93e924aa25e19b2e27f516909ee9787b6bf9925320403dff6d5825b3199edbf2f46608a4e57d9b
SSDEEP 12288:unvpi0XtAWoEn3O4WsiCIJdbUa0OWv4f5GWzH9MgInKa8fbM:unsk+4WxCIJJ6ef5PugIniTM
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.vepi
offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
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/33b490a613f49fa190924f199d2c079e20240512191214/caaf73 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: 0871PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/2816-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1648-4-0x0000000004AD0000-0x0000000004BEB000-memory.dmp	family_djvu
behavioral2/memory/2816-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2816-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2816-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2816-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-37-0x0000000000400000-0x0000000000537000-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
2340	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-1-5-21-1672260578-815027929-964132517-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\aa913a9e-50ae-47b6-a080-94b64b5b192e\\9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe\" --AutoStart"	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.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
6	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1648 set thread context of 2816	1648	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	80
PID 4944 set thread context of 2956	4944	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	86

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
2816	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe
2816	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe
2956	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe
2956	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1648 wrote to memory of 2816	1648	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	80
PID 1648 wrote to memory of 2816	1648	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	80
PID 1648 wrote to memory of 2816	1648	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	80
PID 1648 wrote to memory of 2816	1648	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	80
PID 1648 wrote to memory of 2816	1648	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	80
PID 1648 wrote to memory of 2816	1648	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	80
PID 1648 wrote to memory of 2816	1648	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	80
PID 1648 wrote to memory of 2816	1648	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	80
PID 1648 wrote to memory of 2816	1648	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	80
PID 1648 wrote to memory of 2816	1648	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	80
PID 2816 wrote to memory of 2340	2816	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	81
PID 2816 wrote to memory of 2340	2816	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	81
PID 2816 wrote to memory of 2340	2816	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	81
PID 2816 wrote to memory of 4944	2816	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	82
PID 2816 wrote to memory of 4944	2816	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	82
PID 2816 wrote to memory of 4944	2816	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	82
PID 4944 wrote to memory of 2956	4944	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	86
PID 4944 wrote to memory of 2956	4944	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	86
PID 4944 wrote to memory of 2956	4944	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	86
PID 4944 wrote to memory of 2956	4944	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	86
PID 4944 wrote to memory of 2956	4944	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	86
PID 4944 wrote to memory of 2956	4944	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	86
PID 4944 wrote to memory of 2956	4944	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	86
PID 4944 wrote to memory of 2956	4944	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	86
PID 4944 wrote to memory of 2956	4944	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	86
PID 4944 wrote to memory of 2956	4944	9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe	86

C:\Users\Admin\AppData\Local\Temp\9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe
"C:\Users\Admin\AppData\Local\Temp\9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1648
- C:\Users\Admin\AppData\Local\Temp\9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe
  "C:\Users\Admin\AppData\Local\Temp\9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2816
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\aa913a9e-50ae-47b6-a080-94b64b5b192e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2340
- - C:\Users\Admin\AppData\Local\Temp\9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe
    "C:\Users\Admin\AppData\Local\Temp\9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4944
  - - C:\Users\Admin\AppData\Local\Temp\9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe
      "C:\Users\Admin\AppData\Local\Temp\9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2956

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 a8400cc21263f2c44ccb301a3a1ef66a1ff009fd4d301362fd778e7b23a386d8
MD5 8df6dedd4dd10eb8211463f82b129e29
SHA1 ffc6e51cf829b481d789d8e3e61f6c7096fbde3e
SHA512 25fd6d8684ff8db3d40a8fe33267fd01d6456a84f81c7e579f7508c36558cf731a0ec8a2999a539aa5c1985dc45f7bd20d2a14a343b2326030941858f24c57f4
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 d7dfd2e28aeecf1fb020ff25fa7dd110c7a6d1575770c4e87f3eb6e4a322e49d
MD5 283dbf0b5515b0a59376522ca4899b15
SHA1 152c4ececb6570e4b841b4189f2f00f54e857304
SHA512 3e6875754a003f4bab5dad1ad8700145f299577e8c6298590206750aefbc9547c00f6075bae631ea7d9da115c600bee93e3607d4a51fb64a2ea0aa6cc9bf4579
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 140a6c1c4d9a09e43b2e999bf912f24a7733b22f1b55ba0f07167a232179b96f
MD5 2d0dfe6c5d2ad3b23ca88bf4a136238e
SHA1 f5720ab652ff084e2b600841ea82f7697fc3c7ef
SHA512 ec11a43244534fdc55db87ff7128c26ce62ebfe7eb725169ec62c4ec8caf366e25deafb55d8b2ffc45adfc5ec5926f735a4c7b7092171540df0e7c53f83bd39f
MD5 SHA1 SHA512

Submit Download

9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe

Path C:\Users\Admin\AppData\Local\aa913a9e-50ae-47b6-a080-94b64b5b192e\9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec.exe
Size 733KB
SHA256 9bdb0941fb313cb0726068c73e28a31cfcdfd245e56666e6c86d78918ea85aec
MD5 3eedc2ae680453b8ca3b23fd15f529a7
SHA1 4b1cb1070c23bea1abde90a6329cbf45059e8ae4
SHA512 e9075b16347404b61df5698bb055284f94f686ed318ea6f71b93e924aa25e19b2e27f516909ee9787b6bf9925320403dff6d5825b3199edbf2f46608a4e57d9b
SSDEEP 12288:unvpi0XtAWoEn3O4WsiCIJdbUa0OWv4f5GWzH9MgInKa8fbM:unsk+4WxCIJJ6ef5PugIniTM
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1648-4-0x0000000004AD0000-0x0000000004BEB000-memory.dmp

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memory/1648-1-0x0000000004A30000-0x0000000004AC9000-memory.dmp

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memory/2816-6-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2816-2-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2816-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2816-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2816-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-37-0x0000000000400000-0x0000000000537000-memory.dmp

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