djvu | 7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8

Analysis

max time kernel
150s
max time network
157s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
28/05/2024, 00:00

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General

Target
7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe
Size 785KB
Sample240528-aahawseh71
SHA256 7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8
MD5 797e8a88f490c2c47143533dfd8de3de
SHA1 386aa43daa8cadc722c9faafbc5949eaf2836350
SHA512 d95805a21a0c8cbd8c1e79ac229515952c5fd88e84e653b56533bf24df30a9517844c20a51bceb56fb732d5e88493682a1d76d34694d6b9e065137a3620f3fdd
SSDEEP 24576:z4dnHMgk6dzeXnAg4w80VU5ZpmkEq4+i:z4dsOanA5wDY/X4
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/3608-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1280-4-0x0000000003E20000-0x0000000003F3B000-memory.dmp	family_djvu
behavioral2/memory/3608-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3608-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3608-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3608-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3328-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3328-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3328-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3328-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3328-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3328-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3328-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3328-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3328-37-0x0000000000400000-0x0000000000537000-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
2716	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\\e406a8eb-1b83-4260-b8a1-0afc05581660\\7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe\" --AutoStart"	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.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
8	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1280 set thread context of 3608	1280	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	78
PID 2060 set thread context of 3328	2060	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	83

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
3608	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe
3608	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe
3328	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe
3328	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1280 wrote to memory of 3608	1280	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	78
PID 1280 wrote to memory of 3608	1280	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	78
PID 1280 wrote to memory of 3608	1280	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	78
PID 1280 wrote to memory of 3608	1280	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	78
PID 1280 wrote to memory of 3608	1280	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	78
PID 1280 wrote to memory of 3608	1280	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	78
PID 1280 wrote to memory of 3608	1280	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	78
PID 1280 wrote to memory of 3608	1280	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	78
PID 1280 wrote to memory of 3608	1280	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	78
PID 1280 wrote to memory of 3608	1280	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	78
PID 3608 wrote to memory of 2716	3608	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	79
PID 3608 wrote to memory of 2716	3608	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	79
PID 3608 wrote to memory of 2716	3608	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	79
PID 3608 wrote to memory of 2060	3608	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	80
PID 3608 wrote to memory of 2060	3608	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	80
PID 3608 wrote to memory of 2060	3608	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	80
PID 2060 wrote to memory of 3328	2060	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	83
PID 2060 wrote to memory of 3328	2060	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	83
PID 2060 wrote to memory of 3328	2060	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	83
PID 2060 wrote to memory of 3328	2060	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	83
PID 2060 wrote to memory of 3328	2060	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	83
PID 2060 wrote to memory of 3328	2060	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	83
PID 2060 wrote to memory of 3328	2060	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	83
PID 2060 wrote to memory of 3328	2060	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	83
PID 2060 wrote to memory of 3328	2060	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	83
PID 2060 wrote to memory of 3328	2060	7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe	83

C:\Users\Admin\AppData\Local\Temp\7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe
"C:\Users\Admin\AppData\Local\Temp\7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1280
- C:\Users\Admin\AppData\Local\Temp\7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe
  "C:\Users\Admin\AppData\Local\Temp\7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3608
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\e406a8eb-1b83-4260-b8a1-0afc05581660" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2716
- - C:\Users\Admin\AppData\Local\Temp\7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe
    "C:\Users\Admin\AppData\Local\Temp\7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2060
  - - C:\Users\Admin\AppData\Local\Temp\7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe
      "C:\Users\Admin\AppData\Local\Temp\7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:3328

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 6b4a89d18a5b093a0e4f0b4131ba454a10e09bec471c5cbf173c4003e902bb1e
MD5 e7e25a7c342a2b782db207545eae3405
SHA1 44b1e50f06a37530c2f835be3fb98db40872eda7
SHA512 d18a4092f3900d5512a38588e42aa88d1244ea5b9bccb718ccd17609745eaf92155f74dc19e4a10e1aab193ef8d3421d59a2ff0e79b3cae9e0b6a2885c8c4841
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 9ac8f34b81d7e6c800b38efd197f0d119addfc4ab1182707e02c44e4ff940e09
MD5 27198de6f1f4631f8263255c1a53a370
SHA1 3586ebc56d177e1f3d41b7011fc7b2a916095dbf
SHA512 bb8754efff0e02fa85100738bc59325144677a9cafe7c18c7f63ae14fa969f86c01c648ca85c1a0d38cf505e36eca4085f64ad9e623b95236c5b634680e2d5b0
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 2b43369ea329c245fddf3a566010a3e886f54b67ab994bb37d185d13ca54b0f5
MD5 d3b1ac21d97e0142643559ebd3774993
SHA1 17b5afe14c0578830eb03de8200ac5ce79be7ba6
SHA512 d7de0afb94f1e042c878738e765acec6c0801421559eae83036fd897b103611d9675cab044f29c8f3ddd54c3c2fc8f41f059e9a4c65850ef0f0f8650d61563c7
MD5 SHA1 SHA512

Submit Download

7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe

Path C:\Users\Admin\AppData\Local\e406a8eb-1b83-4260-b8a1-0afc05581660\7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8.exe
Size 785KB
SHA256 7bb2b6c0b69efcda0f03d7accfdfb13c899d6ba2043d12050186f7e6cc778da8
MD5 797e8a88f490c2c47143533dfd8de3de
SHA1 386aa43daa8cadc722c9faafbc5949eaf2836350
SHA512 d95805a21a0c8cbd8c1e79ac229515952c5fd88e84e653b56533bf24df30a9517844c20a51bceb56fb732d5e88493682a1d76d34694d6b9e065137a3620f3fdd
SSDEEP 24576:z4dnHMgk6dzeXnAg4w80VU5ZpmkEq4+i:z4dsOanA5wDY/X4
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1280-1-0x00000000021E0000-0x0000000002278000-memory.dmp

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memory/1280-4-0x0000000003E20000-0x0000000003F3B000-memory.dmp

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memory/3328-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3328-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3328-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3328-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3328-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3328-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3328-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3328-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3328-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3608-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3608-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3608-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3608-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3608-19-0x0000000000400000-0x0000000000537000-memory.dmp

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