djvu | abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139

Analysis

max time kernel
141s
max time network
129s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
29/05/2024, 15:39

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General

Target
abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
Size 791KB
Sample240529-s3ygpabd89
SHA256 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139
MD5 7e757f9cbab5888783a4fd47505e1545
SHA1 0540526f08a8580dc4ef120b10fad767364af1b1
SHA512 da8224fb54b2ff692aed76cd49e2c8bbb8a11ffca58bcf48606e1e8396948693f9107d619c97f019c4e0acd425ed35e3851948d2f41dd84fcb897741b60b6760
SSDEEP 12288:3np5gTpUK81TioQkv4BDrvcVenLNUjYbqtQDzrSP0gjsOit+02wj:3np5gTOX1Ti8wB3XnR1zesgriY02wj
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/4872-2-0x0000000003E00000-0x0000000003F1B000-memory.dmp	family_djvu
behavioral2/memory/396-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/396-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/396-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/396-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/396-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/240-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/240-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/240-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/240-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/240-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/240-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/240-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/240-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/240-37-0x0000000000400000-0x0000000000537000-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
3688	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-1-5-21-1230210488-3096403634-4129516247-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\71d7a078-c93a-40b5-b3b3-5523422e5106\\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe\" --AutoStart"	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.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 4872 set thread context of 396	4872	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	77
PID 3868 set thread context of 240	3868	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	82

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
396	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
396	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
240	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
240	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4872 wrote to memory of 396	4872	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	77
PID 4872 wrote to memory of 396	4872	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	77
PID 4872 wrote to memory of 396	4872	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	77
PID 4872 wrote to memory of 396	4872	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	77
PID 4872 wrote to memory of 396	4872	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	77
PID 4872 wrote to memory of 396	4872	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	77
PID 4872 wrote to memory of 396	4872	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	77
PID 4872 wrote to memory of 396	4872	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	77
PID 4872 wrote to memory of 396	4872	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	77
PID 4872 wrote to memory of 396	4872	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	77
PID 396 wrote to memory of 3688	396	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	78
PID 396 wrote to memory of 3688	396	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	78
PID 396 wrote to memory of 3688	396	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	78
PID 396 wrote to memory of 3868	396	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	79
PID 396 wrote to memory of 3868	396	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	79
PID 396 wrote to memory of 3868	396	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	79
PID 3868 wrote to memory of 240	3868	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	82
PID 3868 wrote to memory of 240	3868	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	82
PID 3868 wrote to memory of 240	3868	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	82
PID 3868 wrote to memory of 240	3868	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	82
PID 3868 wrote to memory of 240	3868	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	82
PID 3868 wrote to memory of 240	3868	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	82
PID 3868 wrote to memory of 240	3868	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	82
PID 3868 wrote to memory of 240	3868	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	82
PID 3868 wrote to memory of 240	3868	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	82
PID 3868 wrote to memory of 240	3868	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	82

C:\Users\Admin\AppData\Local\Temp\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
"C:\Users\Admin\AppData\Local\Temp\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4872
- C:\Users\Admin\AppData\Local\Temp\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
  "C:\Users\Admin\AppData\Local\Temp\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:396
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\71d7a078-c93a-40b5-b3b3-5523422e5106" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3688
- - C:\Users\Admin\AppData\Local\Temp\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
    "C:\Users\Admin\AppData\Local\Temp\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3868
  - - C:\Users\Admin\AppData\Local\Temp\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
      "C:\Users\Admin\AppData\Local\Temp\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:240

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 bfcb18fa2ee3598fdff75b1ecc932c926f011bff60edfa141c41976499c821c5
MD5 6c93f60553415802769aea371043b2a5
SHA1 77d4fae422f2f5af9d6fbcfacf877a5a35a85d1c
SHA512 ca99fb34beb68dd3e2169edc3c30f964702e209439b4f37b292d6f5e39e1361eeb3251201faf9aa4789db66c23e5d55043a4e9a37e2ea4f319d2cd2951ccd965
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 b230ccfa1666c3c583b700c55387fe0f9f20aad39c98ec20306f08c9c077e3a3
MD5 b0921dc5e1afa970227bb32d80802631
SHA1 0e58383f0c72d8e8af3c7611c9ff937fb30c8e16
SHA512 14c332cb542b698d7d5fd868167d1d72de7133b3e5e545aec8cc7ad6772e847574e42a80652e228fa1ca308921d6d811ccbe724712903ed7a87d2bd9cc640c58
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 e95c46c4a49875937deffa7dc4b4759d6a4eb97e86b3564b645941b06bfea985
MD5 8d0a8baa6c818ca46bcbf0686bfb8539
SHA1 c2bb86573a3afae05ffe9a39490928c36a1b2a1b
SHA512 fcc4f0729c2d9e12befaa2f0f1e8c9c0704ed7e5b5f7e80571d7c05e0baef1deb647492c130ac09b7c4e4d35a8a7119f844e8b5d05a34ec2f5c499e5c2b804de
MD5 SHA1 SHA512

Submit Download

abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe

Path C:\Users\Admin\AppData\Local\71d7a078-c93a-40b5-b3b3-5523422e5106\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
Size 791KB
SHA256 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139
MD5 7e757f9cbab5888783a4fd47505e1545
SHA1 0540526f08a8580dc4ef120b10fad767364af1b1
SHA512 da8224fb54b2ff692aed76cd49e2c8bbb8a11ffca58bcf48606e1e8396948693f9107d619c97f019c4e0acd425ed35e3851948d2f41dd84fcb897741b60b6760
SSDEEP 12288:3np5gTpUK81TioQkv4BDrvcVenLNUjYbqtQDzrSP0gjsOit+02wj:3np5gTOX1Ti8wB3XnR1zesgriY02wj
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/240-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/240-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/240-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/240-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/240-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/240-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/240-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/240-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/240-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/396-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/396-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/396-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/396-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/396-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4872-2-0x0000000003E00000-0x0000000003F1B000-memory.dmp

Download

memory/4872-1-0x00000000023C0000-0x0000000002454000-memory.dmp

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