djvu | eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b

Analysis

max time kernel
147s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
01/05/2024, 16:23

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General

Target
eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe
Size 788KB
Sample240501-twabysba7y
SHA256 eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b
MD5 b8f5cc5ef5cda00cf8324d065a6a867a
SHA1 73ccdb79711bb3436b2b1aacd8d5ad1557d5516f
SHA512 7d1231a7599bc90723d49b021e032ce68eb5556a53849cb33eeac2acbf46569b214f1b3f5dd6a9bdb6cab47c9ffa9692201cce2e7c728e86ff745824d930d41a
SSDEEP 12288:wBTCNtnq+i00QFXSbEEJEXbPsotVmQnnEJCEuMJbhlmeqKBCBO:wBUu00Qd+Ee+PH9qDuMJbhlmfK3
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 15 IoCs

resource	yara_rule
behavioral2/memory/1688-2-0x0000000004A30000-0x0000000004B4B000-memory.dmp	family_djvu
behavioral2/memory/1208-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1208-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1208-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1208-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1208-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/740-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/740-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/740-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/740-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/740-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/740-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/740-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/740-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/740-37-0x0000000000400000-0x0000000000537000-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
840	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-1-5-21-293923083-2364846840-4256557006-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\95eae36e-87f9-43c9-aabb-f25250f5994f\\eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe\" --AutoStart"	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.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 1688 set thread context of 1208	1688	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	81
PID 908 set thread context of 740	908	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.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
1208	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe
1208	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe
740	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe
740	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1688 wrote to memory of 1208	1688	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	81
PID 1688 wrote to memory of 1208	1688	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	81
PID 1688 wrote to memory of 1208	1688	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	81
PID 1688 wrote to memory of 1208	1688	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	81
PID 1688 wrote to memory of 1208	1688	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	81
PID 1688 wrote to memory of 1208	1688	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	81
PID 1688 wrote to memory of 1208	1688	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	81
PID 1688 wrote to memory of 1208	1688	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	81
PID 1688 wrote to memory of 1208	1688	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	81
PID 1688 wrote to memory of 1208	1688	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	81
PID 1208 wrote to memory of 840	1208	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	82
PID 1208 wrote to memory of 840	1208	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	82
PID 1208 wrote to memory of 840	1208	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	82
PID 1208 wrote to memory of 908	1208	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	83
PID 1208 wrote to memory of 908	1208	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	83
PID 1208 wrote to memory of 908	1208	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	83
PID 908 wrote to memory of 740	908	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	86
PID 908 wrote to memory of 740	908	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	86
PID 908 wrote to memory of 740	908	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	86
PID 908 wrote to memory of 740	908	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	86
PID 908 wrote to memory of 740	908	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	86
PID 908 wrote to memory of 740	908	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	86
PID 908 wrote to memory of 740	908	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	86
PID 908 wrote to memory of 740	908	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	86
PID 908 wrote to memory of 740	908	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	86
PID 908 wrote to memory of 740	908	eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe	86

C:\Users\Admin\AppData\Local\Temp\eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe
"C:\Users\Admin\AppData\Local\Temp\eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1688
- C:\Users\Admin\AppData\Local\Temp\eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe
  "C:\Users\Admin\AppData\Local\Temp\eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1208
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\95eae36e-87f9-43c9-aabb-f25250f5994f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:840
- - C:\Users\Admin\AppData\Local\Temp\eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe
    "C:\Users\Admin\AppData\Local\Temp\eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:908
  - - C:\Users\Admin\AppData\Local\Temp\eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe
      "C:\Users\Admin\AppData\Local\Temp\eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:740

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 c37f6af3f2edb4df584a83758d6c4cb225c6727f5ef17f0e22eaf18b2437c94e
MD5 99a0d432fc76891e10101274130c11af
SHA1 ede5f93cc5e517dfcd3b4e0bfb4576fb68806817
SHA512 3be97294f3dd5470b9f8852865c8befcd540164b719c1e8045ba5e8cec2afb93d5a0bc04cadebc29a38ba1a030d48b206e1ea87ffd6b8cd1d7879cff9f91bb93
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 c348d5f2dfc999c6aae23894f6bd0bd4173c66494830edda2bd38697868e7dd0
MD5 3d4ab4c1d2940dc2c3d272b091cde3a7
SHA1 ccb262d55b809c40768d551e4c6b511a12d39b58
SHA512 cf8d42c3d86ec5cafe65fcf02a5adbf4195de4e6ad7366b4237fe349312ac40771668a41396a7e7642e0d1387c93e286372749b91f4c1f91fbef22b5ad5481c6
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 348cd3d2c01a001833fff99937c1db60d3286b800db65b7c4bbe776cc9edce40
MD5 9f32e69a66f5ee032a86ac5bf065c76c
SHA1 ff6242d5f37db5a7edaee071a9ff384fa6df6a86
SHA512 6eec59a4ce5adabd3d9a7ea8ea0f26361db50a4a0ab7f0c59bf53aa3e0b2a26b3e486e1e1fcb8e38094dffc0ceb805800d1db74f3c4e25b2c6eec5cbf913560f
MD5 SHA1 SHA512

Submit Download

eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe

Path C:\Users\Admin\AppData\Local\95eae36e-87f9-43c9-aabb-f25250f5994f\eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b.exe
Size 788KB
SHA256 eeb9c7c807a5e4e2fdf760752a51d1a0db91dcd41e6718c9a7c5a50d1cf9852b
MD5 b8f5cc5ef5cda00cf8324d065a6a867a
SHA1 73ccdb79711bb3436b2b1aacd8d5ad1557d5516f
SHA512 7d1231a7599bc90723d49b021e032ce68eb5556a53849cb33eeac2acbf46569b214f1b3f5dd6a9bdb6cab47c9ffa9692201cce2e7c728e86ff745824d930d41a
SSDEEP 12288:wBTCNtnq+i00QFXSbEEJEXbPsotVmQnnEJCEuMJbhlmeqKBCBO:wBUu00Qd+Ee+PH9qDuMJbhlmfK3
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/740-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/740-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/740-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/740-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/740-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/740-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/740-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/740-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/740-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1208-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1208-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1208-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1208-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1208-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1688-2-0x0000000004A30000-0x0000000004B4B000-memory.dmp

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memory/1688-1-0x00000000031E0000-0x0000000003281000-memory.dmp

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