djvu | 66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717

General

Target

66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe
Size

727KB
MD5

f859d0a73facf503a7a218fe34a3b34f
SHA1

c3165a893d1238c58169130f5d72bdd413adf8f2
SHA256

66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717
SHA512

a1a1b46e1abd91504e24aee47b77712c28fe6b69a04e56373d5af3e321face9625ce127817c0df33c9a2de2156a18abcbe0ebb545063be4d1158735583d823eb
SSDEEP

12288:DIS/lkXcgQxxpZnOex7s1YuzVA+5yZM9YjO1JdRhItRgh755NrGq0:HOc7xpZnO0kfGZMyKThOS76q0

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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 17 IoCs

resource	yara_rule
behavioral2/memory/4980-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4980-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5012-3-0x00000000022B0000-0x00000000023CB000-memory.dmp	family_djvu
behavioral2/memory/4980-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4980-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4980-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4124-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4124-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4124-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4124-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4124-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4124-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4124-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4124-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4124-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4124-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4124-40-0x0000000000400000-0x0000000000537000-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
2360	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-1-5-21-1474490143-3221292397-4168103503-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f11093d1-6a8e-4bb3-8cfb-4d912013bff0\\66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe\" --AutoStart"	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.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 5012 set thread context of 4980	5012	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	79
PID 4584 set thread context of 4124	4584	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.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
4980	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe
4980	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe
4124	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe
4124	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 5012 wrote to memory of 4980	5012	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	79
PID 5012 wrote to memory of 4980	5012	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	79
PID 5012 wrote to memory of 4980	5012	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	79
PID 5012 wrote to memory of 4980	5012	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	79
PID 5012 wrote to memory of 4980	5012	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	79
PID 5012 wrote to memory of 4980	5012	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	79
PID 5012 wrote to memory of 4980	5012	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	79
PID 5012 wrote to memory of 4980	5012	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	79
PID 5012 wrote to memory of 4980	5012	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	79
PID 5012 wrote to memory of 4980	5012	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	79
PID 4980 wrote to memory of 2360	4980	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	81
PID 4980 wrote to memory of 2360	4980	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	81
PID 4980 wrote to memory of 2360	4980	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	81
PID 4980 wrote to memory of 4584	4980	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	82
PID 4980 wrote to memory of 4584	4980	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	82
PID 4980 wrote to memory of 4584	4980	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	82
PID 4584 wrote to memory of 4124	4584	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	86
PID 4584 wrote to memory of 4124	4584	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	86
PID 4584 wrote to memory of 4124	4584	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	86
PID 4584 wrote to memory of 4124	4584	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	86
PID 4584 wrote to memory of 4124	4584	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	86
PID 4584 wrote to memory of 4124	4584	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	86
PID 4584 wrote to memory of 4124	4584	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	86
PID 4584 wrote to memory of 4124	4584	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	86
PID 4584 wrote to memory of 4124	4584	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	86
PID 4584 wrote to memory of 4124	4584	66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe	86

C:\Users\Admin\AppData\Local\Temp\66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe
"C:\Users\Admin\AppData\Local\Temp\66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5012
- C:\Users\Admin\AppData\Local\Temp\66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe
  "C:\Users\Admin\AppData\Local\Temp\66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4980
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\f11093d1-6a8e-4bb3-8cfb-4d912013bff0" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2360
- - C:\Users\Admin\AppData\Local\Temp\66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe
    "C:\Users\Admin\AppData\Local\Temp\66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4584
  - - C:\Users\Admin\AppData\Local\Temp\66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe
      "C:\Users\Admin\AppData\Local\Temp\66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4124

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
1KB

MD5
4729bdc0e745b3293b606e2af8a3986f

SHA1
5c5bca22089d566d5f4e2836ea97026952ae1b1d

SHA256
ab2d2c145ab00319ef5b1c4fe09623700a26c25fa009dc18bc3cde11c5bda0ec

SHA512
381e495c91ce282e54940596b53998e152e196eb257853e3c0d97a3e4a26cbf7041cfcaf179ad213d93058aeee9987292dd2302a1219b23a2190aa898910466a

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
971a2478aed003f1b9e6efe35e859064

SHA1
c0545c27a94fbcdafe7aa0f96cef4a1e84568963

SHA256
3342718b9bae833ff3cd134f5deea5015ed960346ecd58287ff5706aef1a7b06

SHA512
a3eac4a17db93e74007764371272c588e92b57aa856af0fc17568bcb80eb625caf00a46f41f695f8057f742b7251463f299f219a94cfd2e8f34efc0055f2b379

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

Filesize
392B

MD5
5c978268a7679e869c1298b9a68b00fa

SHA1
61abdccf67e813c1f95d6096aa525c0d63a548c6

SHA256
43f03ea14623b6890314da99cc747fb7933cb2529dfdbf0147e2fc5a8891be22

SHA512
bb0917b9f36fcc3c8b3bfffaa228066f1cae2b70b47554dee8f7eb95d9f7dc76ee0628cdd865f429194fdafa85652feab89738e7c40d978fe4fa373a6307b4b8

Download Submit
C:\Users\Admin\AppData\Local\f11093d1-6a8e-4bb3-8cfb-4d912013bff0\66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717.exe

Filesize
727KB

MD5
f859d0a73facf503a7a218fe34a3b34f

SHA1
c3165a893d1238c58169130f5d72bdd413adf8f2

SHA256
66c3b567c0e2d075ba7e02764340d5073ee3376788ded9e79b49ab01e23b5717

SHA512
a1a1b46e1abd91504e24aee47b77712c28fe6b69a04e56373d5af3e321face9625ce127817c0df33c9a2de2156a18abcbe0ebb545063be4d1158735583d823eb

Download Submit
memory/4124-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4124-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4124-40-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4124-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4124-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4124-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4124-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4124-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4124-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4124-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4124-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4584-24-0x0000000000400000-0x00000000004FF000-memory.dmp

Filesize
1020KB

Download
memory/4980-2-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4980-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4980-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4980-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4980-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5012-3-0x00000000022B0000-0x00000000023CB000-memory.dmp

Filesize
1.1MB

Download
memory/5012-1-0x0000000002210000-0x00000000022AA000-memory.dmp

Filesize
616KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads