djvu | 3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91

Analysis

max time kernel
143s
max time network
120s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
20/05/2024, 09:14

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe
Size 727KB
Sample240520-k7amesch65
SHA256 3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91
MD5 244934b318cb1b3a72e999d0084ede75
SHA1 2d09e4dc0699d33699d87cff82d648988129b76a
SHA512 ed702e4ba4d1b6cf843fd3c771952a346e60e059ba0360e9a223969db0925bd64c2d5df8019b792fa278fa4254ef1c1f8b0963ee3ef30b0cb9a6d359f4eaf7ae
SSDEEP 12288:cfDdmkE8lYGhp4rIxGlzpD7yD8JMu1ksnAZyjGAjOgmAW7lhUIFq0:yVTY7vhvJMuCsVrjOTAW7Pq0
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.vehu
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: 0872PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral1/memory/3032-6-0x0000000001DA0000-0x0000000001EBB000-memory.dmp	family_djvu
behavioral1/memory/2216-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2216-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2216-9-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2216-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2856-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2856-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2856-51-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2856-50-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2856-52-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2856-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2856-58-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2856-55-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2856-59-0x0000000000400000-0x0000000000537000-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
2616	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-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\70c5d6aa-88b5-41e4-9cc8-b46345e4665b\\3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe\" --AutoStart"	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.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 3032 set thread context of 2216	3032	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	28
PID 2412 set thread context of 2856	2412	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.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
2216	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe
2856	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3032 wrote to memory of 2216	3032	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	28
PID 3032 wrote to memory of 2216	3032	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	28
PID 3032 wrote to memory of 2216	3032	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	28
PID 3032 wrote to memory of 2216	3032	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	28
PID 3032 wrote to memory of 2216	3032	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	28
PID 3032 wrote to memory of 2216	3032	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	28
PID 3032 wrote to memory of 2216	3032	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	28
PID 3032 wrote to memory of 2216	3032	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	28
PID 3032 wrote to memory of 2216	3032	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	28
PID 3032 wrote to memory of 2216	3032	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	28
PID 3032 wrote to memory of 2216	3032	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	28
PID 2216 wrote to memory of 2616	2216	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	29
PID 2216 wrote to memory of 2616	2216	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	29
PID 2216 wrote to memory of 2616	2216	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	29
PID 2216 wrote to memory of 2616	2216	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	29
PID 2216 wrote to memory of 2412	2216	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	30
PID 2216 wrote to memory of 2412	2216	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	30
PID 2216 wrote to memory of 2412	2216	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	30
PID 2216 wrote to memory of 2412	2216	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	30
PID 2412 wrote to memory of 2856	2412	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	31
PID 2412 wrote to memory of 2856	2412	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	31
PID 2412 wrote to memory of 2856	2412	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	31
PID 2412 wrote to memory of 2856	2412	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	31
PID 2412 wrote to memory of 2856	2412	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	31
PID 2412 wrote to memory of 2856	2412	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	31
PID 2412 wrote to memory of 2856	2412	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	31
PID 2412 wrote to memory of 2856	2412	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	31
PID 2412 wrote to memory of 2856	2412	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	31
PID 2412 wrote to memory of 2856	2412	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	31
PID 2412 wrote to memory of 2856	2412	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	31

C:\Users\Admin\AppData\Local\Temp\3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe
"C:\Users\Admin\AppData\Local\Temp\3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3032
- C:\Users\Admin\AppData\Local\Temp\3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe
  "C:\Users\Admin\AppData\Local\Temp\3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2216
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\70c5d6aa-88b5-41e4-9cc8-b46345e4665b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2616
- - C:\Users\Admin\AppData\Local\Temp\3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe
    "C:\Users\Admin\AppData\Local\Temp\3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2412
  - - C:\Users\Admin\AppData\Local\Temp\3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe
      "C:\Users\Admin\AppData\Local\Temp\3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2856

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

Loading Replay Monitor...

Downloads

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 1KB
SHA256 4805b33be79c1143a7370210d66c6b95613680e54105a897052b0f23c3197365
MD5 fe6bd6c298147e79a7f3d71cd37dc191
SHA1 d46b556357a38b15fb12aa6b05f49298d2327925
SHA512 632ea2e5d3ee49dbaa2b7a23fcc8e343d7832b5d5789e38a1e6846c177d76e09a975b974b00b07b74a1a4be6378c8dca79f2b1aa547f686d2d08acdaa4b9bcb1
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 0f1d59966c30f45d60555ab4fc0505a243a218269d83eda2c3284e1c62374c96
MD5 4f0911ef60f51555b57e4a5a289e7971
SHA1 b804d88006d17362812aa785b405dc2bfc9b43aa
SHA512 d24420304c7799fe79159573729077ec93830bc61fd41a8736bb90514b5bcb47d5b0facf70bf0f0c917617b8c7ae8185ed7a47eda1ac1c09d43dc4876ffbb2ff
MD5 SHA1 SHA512

Submit Download

94308059B57B3142E455B38A6EB92015

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Size 344B
SHA256 884efd09108f3077a0af34d8fb183e5e5179587b120f7c4330a24dd3f4e04cc5
MD5 a1e3b4968f094dfc7346200ab8a46196
SHA1 0028ca188e1df1dcc3583e19d16ba5153f05369c
SHA512 5f82ec4a4e0c57ed2e22862c67055c2039cefae75fca7d217e5fe0f93440c246afe1a0a4bd1c1220ca23769f6859cb1c00d3c6dc418997dd70189c29993f3297
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 80ec22e14dbf6437e78cb3172f38959cd35970f83c319f26df6494239b6d484b
MD5 db0546ae23c1a5e88237d8ef003f61f7
SHA1 dea24380db50bc74f68851cf00f41d0f3e1ee388
SHA512 b9f7edbb28b8c4bffe6aa769ee8352ac6d00c7ccb51166cd3874da1b1055f23339a62e92984e2039ee47e97abf392d9c44e0ecdb2a7a90b0ce3d6d8567ac9d43
MD5 SHA1 SHA512

Submit Download

3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe

Path C:\Users\Admin\AppData\Local\70c5d6aa-88b5-41e4-9cc8-b46345e4665b\3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe
Size 727KB
SHA256 3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91
MD5 244934b318cb1b3a72e999d0084ede75
SHA1 2d09e4dc0699d33699d87cff82d648988129b76a
SHA512 ed702e4ba4d1b6cf843fd3c771952a346e60e059ba0360e9a223969db0925bd64c2d5df8019b792fa278fa4254ef1c1f8b0963ee3ef30b0cb9a6d359f4eaf7ae
SSDEEP 12288:cfDdmkE8lYGhp4rIxGlzpD7yD8JMu1ksnAZyjGAjOgmAW7lhUIFq0:yVTY7vhvJMuCsVrjOTAW7Pq0
MD5 SHA1 SHA512 SSDEEP

Submit Download

Cab2B45.tmp

Path C:\Users\Admin\AppData\Local\Temp\Cab2B45.tmp
Size 65KB
SHA256 c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
MD5 ac05d27423a85adc1622c714f2cb6184
SHA1 b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA512 6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d
SSDEEP 1536:drFvD2YSE/sFDqV0FJJynkAhftCvMd3coa282frgW1qgNzU:drVDJSeaDqV0FJwLhVkr282fF5U
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2216-8-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2216-9-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2216-27-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2216-4-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2216-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Download

memory/2412-29-0x0000000000230000-0x00000000002C1000-memory.dmp

Download

memory/2412-30-0x0000000000400000-0x00000000004FF000-memory.dmp

Download

memory/2412-35-0x0000000000400000-0x00000000004FF000-memory.dmp

Download

memory/2856-37-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2856-36-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2856-51-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2856-50-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2856-52-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2856-57-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2856-58-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2856-55-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2856-59-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/3032-0-0x0000000000320000-0x00000000003B1000-memory.dmp

Download

memory/3032-5-0x0000000000320000-0x00000000003B1000-memory.dmp

Download

memory/3032-6-0x0000000001DA0000-0x0000000001EBB000-memory.dmp

Download

memory/3032-1-0x0000000000320000-0x00000000003B1000-memory.dmp

Download