djvu | 09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319

Analysis

max time kernel
143s
max time network
125s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
21/05/2024, 15:19

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General

Target
09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe
Size 708KB
Sample240521-sqavvsab46
SHA256 09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319
MD5 afc2780d65fe1e67d01ae629cd2f1e0f
SHA1 cabfc8608feca588c98e30476e79b9df85171c6f
SHA512 390b4b8a11c099d512e2388c408492190311b2daaefc063c9279b6cc3f3a96ec3b71a1905556188439b42d29d2bde40662241a4ba08a456e5c72af3307f915b5
SSDEEP 12288:SbYZF34fEdgCZ/Qp9bzIWDvhcC38g1AjGjJp4C0G6K98:S2F4EdgCZ/clbcCN6m74CS
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 15 IoCs

resource	yara_rule
behavioral2/memory/124-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/124-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/124-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/124-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5024-2-0x0000000004290000-0x00000000043AB000-memory.dmp	family_djvu
behavioral2/memory/124-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-37-0x0000000000400000-0x0000000000537000-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
3916	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-1-5-21-3938118698-2964058152-2337880935-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\169efb0b-ea79-4a42-9a64-ddc60b2b1e86\\09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe\" --AutoStart"	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.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
5	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 5024 set thread context of 124	5024	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	78
PID 2200 set thread context of 4900	2200	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.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
124	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe
124	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe
4900	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe
4900	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 5024 wrote to memory of 124	5024	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	78
PID 5024 wrote to memory of 124	5024	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	78
PID 5024 wrote to memory of 124	5024	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	78
PID 5024 wrote to memory of 124	5024	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	78
PID 5024 wrote to memory of 124	5024	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	78
PID 5024 wrote to memory of 124	5024	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	78
PID 5024 wrote to memory of 124	5024	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	78
PID 5024 wrote to memory of 124	5024	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	78
PID 5024 wrote to memory of 124	5024	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	78
PID 5024 wrote to memory of 124	5024	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	78
PID 124 wrote to memory of 3916	124	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	79
PID 124 wrote to memory of 3916	124	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	79
PID 124 wrote to memory of 3916	124	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	79
PID 124 wrote to memory of 2200	124	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	80
PID 124 wrote to memory of 2200	124	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	80
PID 124 wrote to memory of 2200	124	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	80
PID 2200 wrote to memory of 4900	2200	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	83
PID 2200 wrote to memory of 4900	2200	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	83
PID 2200 wrote to memory of 4900	2200	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	83
PID 2200 wrote to memory of 4900	2200	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	83
PID 2200 wrote to memory of 4900	2200	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	83
PID 2200 wrote to memory of 4900	2200	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	83
PID 2200 wrote to memory of 4900	2200	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	83
PID 2200 wrote to memory of 4900	2200	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	83
PID 2200 wrote to memory of 4900	2200	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	83
PID 2200 wrote to memory of 4900	2200	09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe	83

C:\Users\Admin\AppData\Local\Temp\09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe
"C:\Users\Admin\AppData\Local\Temp\09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5024
- C:\Users\Admin\AppData\Local\Temp\09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe
  "C:\Users\Admin\AppData\Local\Temp\09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:124
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\169efb0b-ea79-4a42-9a64-ddc60b2b1e86" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3916
- - C:\Users\Admin\AppData\Local\Temp\09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe
    "C:\Users\Admin\AppData\Local\Temp\09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2200
  - - C:\Users\Admin\AppData\Local\Temp\09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe
      "C:\Users\Admin\AppData\Local\Temp\09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4900

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 d5ff96fd8b416de93a85783192206224cf8821c240cd8ff755f2e8270153dd99
MD5 df80f9ba75076db634761b6132e0d4e3
SHA1 07983946fb660752c7cccb2ef82d01ec4c9ecc5d
SHA512 4ec734c5d29e9ce00b00e42b627253195e8c7a158433fedfcee428e692a6501981c33d7c8a39235f8b691f087145cdbe660b430493edbeedb12588c5cdd5a66a
MD5 SHA1 SHA512

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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

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24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 ef9f4cf873820999a935507be6da187aa42e0b2d8fc0467a7182805b768bc759
MD5 76acad754bd7aa5340ced025611ead1a
SHA1 cd7d8adaa97daa47c3ef494bb0c00c247a39cf7d
SHA512 2b0ff969b2108e2d043f88f43ea4a2d8d44eae069981b809d238e78f8dd436f6e5b449c0d40ad4f0e69c9429669406a5772e84c181447089a9f9584a90e294c9
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 1366d188516345257e9717ade350dd7ee1bcfb647eb96e7abcc0b1aa0e97a2ce
MD5 a3c4f59b445cc6ce8d6bd967738b2466
SHA1 c965d616dfc20ade69f654fdd64940ae0ec71585
SHA512 72ff1445b776189a0fa4c14a18cc2a38f5efa0db3b92ed9c3a432048b2281d8b8a6e88812711b85c995a26cb6a76b1bf68b8df1b3a6d30f33868216bfd13dfce
MD5 SHA1 SHA512

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09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe

Path C:\Users\Admin\AppData\Local\169efb0b-ea79-4a42-9a64-ddc60b2b1e86\09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319.exe
Size 708KB
SHA256 09c996d86da2ff031b3039f9d0c26411ab6e4ef60042c1927d21b83c50104319
MD5 afc2780d65fe1e67d01ae629cd2f1e0f
SHA1 cabfc8608feca588c98e30476e79b9df85171c6f
SHA512 390b4b8a11c099d512e2388c408492190311b2daaefc063c9279b6cc3f3a96ec3b71a1905556188439b42d29d2bde40662241a4ba08a456e5c72af3307f915b5
SSDEEP 12288:SbYZF34fEdgCZ/Qp9bzIWDvhcC38g1AjGjJp4C0G6K98:S2F4EdgCZ/clbcCN6m74CS
MD5 SHA1 SHA512 SSDEEP

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memory/124-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/124-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/124-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/124-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/124-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5024-1-0x0000000004140000-0x00000000041DD000-memory.dmp

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memory/5024-2-0x0000000004290000-0x00000000043AB000-memory.dmp

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