djvu | 400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d

Analysis

max time kernel
142s
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
28/04/2024, 05:53

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General

Target
400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe
Size 811KB
Sample240428-glc9mshf91
SHA256 400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d
MD5 3b7cb7fae5707ae3e2ea26069ebcca43
SHA1 1ca6d1cd0fbc779e79c3330e890b641c3cf9ec20
SHA512 d7ae99687db122aae398a62f9b4d57f6cd468a502bf83ab19d8f13952580eaf4565a8dc4b45dfc2baaef8e55981d75e6d0f99effc9becfad0fca33e3a9e74234
SSDEEP 12288:2v05HBL32kp/jDenJPoykKrwFlAfwlUdlV4L6hDo9fvbkt1X7mDf6LIYLwE:9hjV5j6nyytrcAfwlWYGQIrib6zLwE
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.bgzq
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
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/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 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: 0864PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/3152-2-0x0000000003840000-0x000000000395B000-memory.dmp	family_djvu
behavioral2/memory/1532-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1532-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1532-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1532-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1532-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/432-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/432-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/432-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/432-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/432-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/432-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/432-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/432-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/432-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/432-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/432-40-0x0000000000400000-0x0000000000537000-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
3792	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\\25cb02be-32b3-49c3-afb8-b0c8e1fab8a3\\400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe\" --AutoStart"	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.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 3152 set thread context of 1532	3152	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	80
PID 3644 set thread context of 432	3644	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	85

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
1532	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe
1532	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe
432	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe
432	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3152 wrote to memory of 1532	3152	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	80
PID 3152 wrote to memory of 1532	3152	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	80
PID 3152 wrote to memory of 1532	3152	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	80
PID 3152 wrote to memory of 1532	3152	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	80
PID 3152 wrote to memory of 1532	3152	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	80
PID 3152 wrote to memory of 1532	3152	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	80
PID 3152 wrote to memory of 1532	3152	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	80
PID 3152 wrote to memory of 1532	3152	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	80
PID 3152 wrote to memory of 1532	3152	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	80
PID 3152 wrote to memory of 1532	3152	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	80
PID 1532 wrote to memory of 3792	1532	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	81
PID 1532 wrote to memory of 3792	1532	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	81
PID 1532 wrote to memory of 3792	1532	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	81
PID 1532 wrote to memory of 3644	1532	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	82
PID 1532 wrote to memory of 3644	1532	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	82
PID 1532 wrote to memory of 3644	1532	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	82
PID 3644 wrote to memory of 432	3644	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	85
PID 3644 wrote to memory of 432	3644	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	85
PID 3644 wrote to memory of 432	3644	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	85
PID 3644 wrote to memory of 432	3644	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	85
PID 3644 wrote to memory of 432	3644	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	85
PID 3644 wrote to memory of 432	3644	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	85
PID 3644 wrote to memory of 432	3644	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	85
PID 3644 wrote to memory of 432	3644	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	85
PID 3644 wrote to memory of 432	3644	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	85
PID 3644 wrote to memory of 432	3644	400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe	85

C:\Users\Admin\AppData\Local\Temp\400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe
"C:\Users\Admin\AppData\Local\Temp\400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3152
- C:\Users\Admin\AppData\Local\Temp\400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe
  "C:\Users\Admin\AppData\Local\Temp\400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1532
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\25cb02be-32b3-49c3-afb8-b0c8e1fab8a3" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3792
- - C:\Users\Admin\AppData\Local\Temp\400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe
    "C:\Users\Admin\AppData\Local\Temp\400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3644
  - - C:\Users\Admin\AppData\Local\Temp\400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe
      "C:\Users\Admin\AppData\Local\Temp\400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:432

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 453dc1d9052191d3bb38472a2d4c25e19bd6ad5d98c49a0921a917186ccfef9f
MD5 f1725eea0f3f9892825f892bd8b59677
SHA1 52a1806c5d45b754016af1f70bc58004050a4854
SHA512 f9036f1e8c35307460ec9be5876a4e917bec0478f59bb0783d3bcdad6cf11b2607b36e97c0d54b33a1d2d327488f055b8a2e5eee696e3132d596e2ed02dc7360
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 9067021f5f1c18822db941c3a957e2dcd13e23da9475be4ffcdb4ddc201f249a
MD5 e4d8c6d98bfc8c89dc51895f33547bac
SHA1 46fe7b8ea083d56c70253577b507aab67e0aa50f
SHA512 b08aa0995de2892f6d309f696a5ab82aacff66f99f666f223fa20da814dc4037c2267c4859e8355d5252a08d7e58a98cc9df7bcae8022a29ac3f5cf7b88231d1
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 fda27261a9d390e0e95a4cf2f3b20824dc17e6431523376a2412570c59b35a83
MD5 bdc89db5f1e91fb75fc4b793577b8130
SHA1 e201a47f3566a05b28866cc99765a6e52365ba06
SHA512 c204cd3beefef502cd97813257080b50b940451646dfeb9c9fee2486080347d9a20ef64bff7a23dba0c162f40f4700b057551ed89784ec228e237760bc452156
MD5 SHA1 SHA512

Submit Download

400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe

Path C:\Users\Admin\AppData\Local\25cb02be-32b3-49c3-afb8-b0c8e1fab8a3\400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d.exe
Size 811KB
SHA256 400c3c38e07a136cb766ece3063b5a232194aa23c3c1a46b6af4465ed793207d
MD5 3b7cb7fae5707ae3e2ea26069ebcca43
SHA1 1ca6d1cd0fbc779e79c3330e890b641c3cf9ec20
SHA512 d7ae99687db122aae398a62f9b4d57f6cd468a502bf83ab19d8f13952580eaf4565a8dc4b45dfc2baaef8e55981d75e6d0f99effc9becfad0fca33e3a9e74234
SSDEEP 12288:2v05HBL32kp/jDenJPoykKrwFlAfwlUdlV4L6hDo9fvbkt1X7mDf6LIYLwE:9hjV5j6nyytrcAfwlWYGQIrib6zLwE
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/432-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/432-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/432-40-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/432-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/432-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/432-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/432-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/432-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/432-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/432-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/432-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1532-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1532-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1532-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1532-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1532-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3152-2-0x0000000003840000-0x000000000395B000-memory.dmp

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memory/3152-1-0x0000000001DF0000-0x0000000001E90000-memory.dmp

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memory/3644-21-0x0000000001C80000-0x0000000001D16000-memory.dmp

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