djvu | 5d192752f52851d5f724cdbc6d69f560942dae759892ea72f7225ceddef357dc

Analysis

max time kernel
116s
max time network
132s
platform
windows10-2004_x64
resource
win10v2004-20231020-en
resource tags

arch:x64arch:x86image:win10v2004-20231020-enlocale:en-usos:windows10-2004-x64system
submitted
24/10/2023, 17:36

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General

Target

file.exe
Size

683KB
MD5

54617b340cd2b0bb2e89ecb20f11ece1
SHA1

e9d505621ee71e1dba49f14e45c6cbbb980f46a6
SHA256

5d192752f52851d5f724cdbc6d69f560942dae759892ea72f7225ceddef357dc
SHA512

3e347604440c92b584c5f6c75830037255c5a6fe9b855410065ed5306e4dde3688974c90d83dd5c4338bed8169bd6df8c68329e36e5a198b7b276a797bfc6df1
SSDEEP

12288:Jh2/R7Tye06Tgh0LYc0N68ProhMmreWWyGMftQE32aNcFmu2Pt7:JIRvyeChgYcUlWldGMftQE32a5uqt7

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.zpww
offline_id
OnB5BCsUkG8OhWvHL3Y0tNlfgHqdMG4puQsBzvt1
payload_url
http://colisumy.com/dl/build2.exe

http://zexeq.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. You can get and look video overview decrypt tool: https://we.tl/t-cfHHerNTF6 Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. 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: 0813JOsie

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 18 IoCs

resource	yara_rule
behavioral2/memory/640-2-0x0000000002790000-0x00000000028AB000-memory.dmp	family_djvu
behavioral2/memory/4664-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4592-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4592-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4592-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4592-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4592-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4592-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4592-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4592-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4592-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4592-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4592-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3484-62-0x00000000007F0000-0x00000000008F0000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Downloads MZ/PE file

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3811856890-180006922-3689258494-1000\Control Panel\International\Geo\Nation	file.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3811856890-180006922-3689258494-1000\Control Panel\International\Geo\Nation	file.exe

Executes dropped EXE 3 IoCs

pid	Process
3484	build3.exe
4800	build3.exe
4200	mstsca.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3088	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-1-5-21-3811856890-180006922-3689258494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\8b643d7e-4176-4978-99bb-1ee291fb66ff\\file.exe\" --AutoStart"	file.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
29	api.2ip.ua
34	api.2ip.ua
28	api.2ip.ua

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 640 set thread context of 4664	640	file.exe	90
PID 4200 set thread context of 4592	4200	file.exe	96
PID 3484 set thread context of 4800	3484	build3.exe	102

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
1620	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4664	file.exe
4664	file.exe
4592	file.exe
4592	file.exe

Suspicious use of WriteProcessMemory 41 IoCs

description	pid	Process	procid_target
PID 640 wrote to memory of 4664	640	file.exe	90
PID 640 wrote to memory of 4664	640	file.exe	90
PID 640 wrote to memory of 4664	640	file.exe	90
PID 640 wrote to memory of 4664	640	file.exe	90
PID 640 wrote to memory of 4664	640	file.exe	90
PID 640 wrote to memory of 4664	640	file.exe	90
PID 640 wrote to memory of 4664	640	file.exe	90
PID 640 wrote to memory of 4664	640	file.exe	90
PID 640 wrote to memory of 4664	640	file.exe	90
PID 640 wrote to memory of 4664	640	file.exe	90
PID 4664 wrote to memory of 3088	4664	file.exe	93
PID 4664 wrote to memory of 3088	4664	file.exe	93
PID 4664 wrote to memory of 3088	4664	file.exe	93
PID 4664 wrote to memory of 4200	4664	file.exe	94
PID 4664 wrote to memory of 4200	4664	file.exe	94
PID 4664 wrote to memory of 4200	4664	file.exe	94
PID 4200 wrote to memory of 4592	4200	file.exe	96
PID 4200 wrote to memory of 4592	4200	file.exe	96
PID 4200 wrote to memory of 4592	4200	file.exe	96
PID 4200 wrote to memory of 4592	4200	file.exe	96
PID 4200 wrote to memory of 4592	4200	file.exe	96
PID 4200 wrote to memory of 4592	4200	file.exe	96
PID 4200 wrote to memory of 4592	4200	file.exe	96
PID 4200 wrote to memory of 4592	4200	file.exe	96
PID 4200 wrote to memory of 4592	4200	file.exe	96
PID 4200 wrote to memory of 4592	4200	file.exe	96
PID 4592 wrote to memory of 3484	4592	file.exe	101
PID 4592 wrote to memory of 3484	4592	file.exe	101
PID 4592 wrote to memory of 3484	4592	file.exe	101
PID 3484 wrote to memory of 4800	3484	build3.exe	102
PID 3484 wrote to memory of 4800	3484	build3.exe	102
PID 3484 wrote to memory of 4800	3484	build3.exe	102
PID 3484 wrote to memory of 4800	3484	build3.exe	102
PID 3484 wrote to memory of 4800	3484	build3.exe	102
PID 3484 wrote to memory of 4800	3484	build3.exe	102
PID 3484 wrote to memory of 4800	3484	build3.exe	102
PID 3484 wrote to memory of 4800	3484	build3.exe	102
PID 3484 wrote to memory of 4800	3484	build3.exe	102
PID 4800 wrote to memory of 1620	4800	build3.exe	103
PID 4800 wrote to memory of 1620	4800	build3.exe	103
PID 4800 wrote to memory of 1620	4800	build3.exe	103

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:640
- C:\Users\Admin\AppData\Local\Temp\file.exe
  "C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4664
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\8b643d7e-4176-4978-99bb-1ee291fb66ff" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3088
- - C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4200
  - - C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Checks computer location settings
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of WriteProcessMemory
      PID:4592
    - - C:\Users\Admin\AppData\Local\a8625234-5c19-42d2-87d1-e1e9cb3de438\build3.exe
        
        "C:\Users\Admin\AppData\Local\a8625234-5c19-42d2-87d1-e1e9cb3de438\build3.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of WriteProcessMemory
        
        PID:3484
      - C:\Users\Admin\AppData\Local\a8625234-5c19-42d2-87d1-e1e9cb3de438\build3.exe
        
        "C:\Users\Admin\AppData\Local\a8625234-5c19-42d2-87d1-e1e9cb3de438\build3.exe"
        6⤵
        Executes dropped EXE
        Suspicious use of WriteProcessMemory
        
        PID:4800
        
        C:\Windows\SysWOW64\schtasks.exe
        
        /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
        7⤵
        Creates scheduled task(s)
        
        PID:1620

C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
1⤵
- Executes dropped EXE
PID:4200

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

File and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
1KB

MD5
af6988dbc87cdc5156739e23211b4e3b

SHA1
764e881de14df4ebd9da60c7115da12f746d3338

SHA256
2eade990ea964a19eb75cc73578dabe4ccd7e43bd64b94d43d3c7fefcedd9361

SHA512
4d2e2b88696bf6c1f6567677612d9e4fc0dc17a27f70808580c6c1918625941ab9cf3f6521e7b5d735956d37c920700044e8541655ba3ef6c31467dc69629262

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
724B

MD5
8202a1cd02e7d69597995cabbe881a12

SHA1
8858d9d934b7aa9330ee73de6c476acf19929ff6

SHA256
58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

SHA512
97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
410B

MD5
1284e0251fe00daf9dbeecbad46d915c

SHA1
8b467bfd2000f4262f0830f4a094a92244183bde

SHA256
1cbe46aa5d5a2d34a981137835a9977d0208f7b4a81de30b34061a62094d761b

SHA512
8fc68505b9ddc852ed2d90a7799051cdea48b5c9f7c68e091648e53886ace6d57a320f1d90249a39c39b2234e0d1adafd172630ec837578bd6469dc0d502ab64

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
392B

MD5
864f2c8b04c694f9384a9e934f1e7795

SHA1
90164a7a7f7b2f38dc8d1564869cfad03af926be

SHA256
fadee3be0668d7dd4edd281a04cc5565362f3ef10a06a844df1f2136228b224d

SHA512
0bf4139f9b60b24ef7e97fe1189df8803edf9d730fe953831c58bf4ee80dea88c3c77ad06a98ea1d084bac91c5b2208333cbe9bf3136748d9d5f6b40c25348ee

Download Submit
C:\Users\Admin\AppData\Local\8b643d7e-4176-4978-99bb-1ee291fb66ff\file.exe

Filesize
683KB

MD5
54617b340cd2b0bb2e89ecb20f11ece1

SHA1
e9d505621ee71e1dba49f14e45c6cbbb980f46a6

SHA256
5d192752f52851d5f724cdbc6d69f560942dae759892ea72f7225ceddef357dc

SHA512
3e347604440c92b584c5f6c75830037255c5a6fe9b855410065ed5306e4dde3688974c90d83dd5c4338bed8169bd6df8c68329e36e5a198b7b276a797bfc6df1

Download Submit
C:\Users\Admin\AppData\Local\a8625234-5c19-42d2-87d1-e1e9cb3de438\build3.exe

Filesize
299KB

MD5
41b883a061c95e9b9cb17d4ca50de770

SHA1
1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad

SHA256
fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

SHA512
cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319

Download Submit
C:\Users\Admin\AppData\Local\a8625234-5c19-42d2-87d1-e1e9cb3de438\build3.exe

Filesize
299KB

MD5
41b883a061c95e9b9cb17d4ca50de770

SHA1
1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad

SHA256
fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

SHA512
cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319

Download Submit
C:\Users\Admin\AppData\Local\a8625234-5c19-42d2-87d1-e1e9cb3de438\build3.exe

Filesize
299KB

MD5
41b883a061c95e9b9cb17d4ca50de770

SHA1
1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad

SHA256
fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

SHA512
cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319

Download Submit
C:\Users\Admin\AppData\Local\a8625234-5c19-42d2-87d1-e1e9cb3de438\build3.exe

Filesize
299KB

MD5
41b883a061c95e9b9cb17d4ca50de770

SHA1
1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad

SHA256
fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

SHA512
cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe

Filesize
299KB

MD5
41b883a061c95e9b9cb17d4ca50de770

SHA1
1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad

SHA256
fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

SHA512
cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe

Filesize
299KB

MD5
41b883a061c95e9b9cb17d4ca50de770

SHA1
1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad

SHA256
fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

SHA512
cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319

Download Submit
memory/640-1-0x00000000025E0000-0x0000000002681000-memory.dmp

Filesize
644KB

Download
memory/640-2-0x0000000002790000-0x00000000028AB000-memory.dmp

Filesize
1.1MB

Download
memory/3484-62-0x00000000007F0000-0x00000000008F0000-memory.dmp

Filesize
1024KB

Download
memory/3484-63-0x0000000000980000-0x0000000000984000-memory.dmp

Filesize
16KB

Download
memory/4200-18-0x0000000002510000-0x00000000025A6000-memory.dmp

Filesize
600KB

Download
memory/4592-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4592-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4592-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4592-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4592-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4592-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4592-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4592-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4592-57-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4592-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4592-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4664-15-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4664-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4664-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4664-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4664-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4800-64-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4800-67-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4800-68-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4800-71-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download