djvu | bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d

Analysis

max time kernel
145s
max time network
128s
platform
windows11-21h2_x64
resource
win11-20240412-en
resource tags

arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
submitted
17/04/2024, 12:55

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General

Target
bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe
Size 805KB
Sample240417-p53yeagb22
SHA256 bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d
MD5 fdaf82c56bb3d8ba6d0efa7becc52c80
SHA1 ab0dca0a0ddc9d4d6a3f4a8bd07fb80e06e68e22
SHA512 d96019e09fc365b12de5d19b2d142bddaf88753204f20455985f5bb5d82a84b62a3b226493d33b469532f307a6506847d921f1c6f3de759b273acfd88a32b598
SSDEEP 12288:mcK30av3XRmN3vqhJv6S6bweFonltmV10SoQtbxVR0MZ9VuQ3IIn6xMl:mxnRmcr6Jxgw10SfxjR0Mxu6Z6
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.uazq
offline_id
Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://sajdfue.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/df01994dd8d37c2c33469922f8e7155a20240402134014/fd95b0 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: 0860PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/3328-2-0x0000000004C90000-0x0000000004DAB000-memory.dmp	family_djvu
behavioral2/memory/3852-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3852-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3852-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3852-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3852-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-39-0x0000000000400000-0x0000000000537000-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
5040	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-1-5-21-3263309122-2820180308-3568046652-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e564a5e1-875b-4c61-a8da-8ddae5307c65\\bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe\" --AutoStart"	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.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 3328 set thread context of 3852	3328	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	78
PID 3424 set thread context of 4900	3424	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.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
3852	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe
3852	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe
4900	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe
4900	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3328 wrote to memory of 3852	3328	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	78
PID 3328 wrote to memory of 3852	3328	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	78
PID 3328 wrote to memory of 3852	3328	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	78
PID 3328 wrote to memory of 3852	3328	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	78
PID 3328 wrote to memory of 3852	3328	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	78
PID 3328 wrote to memory of 3852	3328	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	78
PID 3328 wrote to memory of 3852	3328	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	78
PID 3328 wrote to memory of 3852	3328	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	78
PID 3328 wrote to memory of 3852	3328	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	78
PID 3328 wrote to memory of 3852	3328	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	78
PID 3852 wrote to memory of 5040	3852	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	79
PID 3852 wrote to memory of 5040	3852	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	79
PID 3852 wrote to memory of 5040	3852	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	79
PID 3852 wrote to memory of 3424	3852	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	80
PID 3852 wrote to memory of 3424	3852	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	80
PID 3852 wrote to memory of 3424	3852	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	80
PID 3424 wrote to memory of 4900	3424	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	83
PID 3424 wrote to memory of 4900	3424	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	83
PID 3424 wrote to memory of 4900	3424	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	83
PID 3424 wrote to memory of 4900	3424	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	83
PID 3424 wrote to memory of 4900	3424	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	83
PID 3424 wrote to memory of 4900	3424	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	83
PID 3424 wrote to memory of 4900	3424	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	83
PID 3424 wrote to memory of 4900	3424	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	83
PID 3424 wrote to memory of 4900	3424	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	83
PID 3424 wrote to memory of 4900	3424	bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe	83

C:\Users\Admin\AppData\Local\Temp\bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe
"C:\Users\Admin\AppData\Local\Temp\bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3328
- C:\Users\Admin\AppData\Local\Temp\bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe
  "C:\Users\Admin\AppData\Local\Temp\bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3852
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\e564a5e1-875b-4c61-a8da-8ddae5307c65" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:5040
- - C:\Users\Admin\AppData\Local\Temp\bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe
    "C:\Users\Admin\AppData\Local\Temp\bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3424
  - - C:\Users\Admin\AppData\Local\Temp\bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe
      "C:\Users\Admin\AppData\Local\Temp\bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.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 9bd599b72ac9d6f5ad1da7982d2a847f52f01c8922bb0d1b27371b11dedf4c3a
MD5 896dc4f56c1b7ce86308a438e1eb5384
SHA1 edb5c0ee5aba86a7622d59aa3db7ff3abef929f9
SHA512 81728dfb7eccf691ccc4b556d0f61d4af1d0f7696009a03deb46502f843e9bd15b6cc41d50cdba0ea0c26891f0eaffa8a9ff33e8a35ade02c0f51037c7b4e549
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 a453f706a23b1c283c0c0be9534285fbaf24d3a88ce6c9f3d247fd02568f8fbe
MD5 c5d148ddfccb5b61acb99541d5ac21a9
SHA1 03f554503186c054ba7c7b94c547afedee53095c
SHA512 8624f61e559ca684aae8534c9f6e9a99e66d792d1afd85677b4c75f9c6256c8eec5e6f3cf0138a0bdd903b8e1884cd567afc7045c50b24f1ac527b6ca7af3593
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 55318006d969c60f5c1eab1f22f8ebc005108e5461de3f49b959c3bd7e725d54
MD5 9fea676b16bba41ff4c07a7e3d401bd9
SHA1 5a0112aad3ec678328ef1609cc6358378caa2b1b
SHA512 45520a41da6a4d950cee11aa5766013500299d7c7e37e7bb410e1a91dfc4a554d9bfde3b11c5bfb16ef58b2c9d0f79784085d63a05df233138b8906a98238bdf
MD5 SHA1 SHA512

Submit Download

bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe

Path C:\Users\Admin\AppData\Local\e564a5e1-875b-4c61-a8da-8ddae5307c65\bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d.exe
Size 805KB
SHA256 bac6a7afb5447556528a8d449bcc5d382a4f4ccd25b31dee86ac40f4c462624d
MD5 fdaf82c56bb3d8ba6d0efa7becc52c80
SHA1 ab0dca0a0ddc9d4d6a3f4a8bd07fb80e06e68e22
SHA512 d96019e09fc365b12de5d19b2d142bddaf88753204f20455985f5bb5d82a84b62a3b226493d33b469532f307a6506847d921f1c6f3de759b273acfd88a32b598
SSDEEP 12288:mcK30av3XRmN3vqhJv6S6bweFonltmV10SoQtbxVR0MZ9VuQ3IIn6xMl:mxnRmcr6Jxgw10SfxjR0Mxu6Z6
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/3328-1-0x0000000004BF0000-0x0000000004C88000-memory.dmp

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memory/3328-2-0x0000000004C90000-0x0000000004DAB000-memory.dmp

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memory/3424-22-0x0000000004AD0000-0x0000000004B62000-memory.dmp

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memory/3852-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3852-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3852-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3852-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3852-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-21-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-23-0x0000000000400000-0x0000000000537000-memory.dmp

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

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memory/4900-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-34-0x0000000000400000-0x0000000000537000-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/4900-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-39-0x0000000000400000-0x0000000000537000-memory.dmp

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