djvu | 651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc

Analysis

max time kernel
144s
max time network
125s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
18/03/2025, 04:28

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General

Target

651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe
Size

831KB
MD5

c3804647168d439928c2ca4019d87609
SHA1

ceb7a332a4ed40878a2c381fcf76fcd06528df65
SHA256

651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc
SHA512

d15fd9303f231915add3ff5cf696d1a5ad90d049f15355337bacf1867e2b968319de7b43de1c4e5c8f3eb8dfbca15766f79b2143e21bcdc14b602b43f4db939f
SSDEEP

12288:yzax3E2dGY3FVW68muE1QfkyGVVXCw8mpMS321U5dIqgomEHlRNeu1XWDtV7E9:yUTPVWvmuE1UkyWt8Qm6gCmE/hM7Q

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 13 IoCs

resource	yara_rule
behavioral1/memory/1972-2-0x0000000005930000-0x0000000005A4B000-memory.dmp	family_djvu
behavioral1/memory/848-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/848-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/848-9-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/848-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2176-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2176-44-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2176-43-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2176-45-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2176-49-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2176-52-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2176-51-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2176-53-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Djvu family
djvu

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3004	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-1-5-21-1163522206-1469769407-485553996-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\2c24ced6-23ae-4945-9ded-03aba224e906\\651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe\" --AutoStart"	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.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
4	api.2ip.ua
5	api.2ip.ua
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1972 set thread context of 848	1972	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	30
PID 2608 set thread context of 2176	2608	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	35

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
848	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe
848	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe
2176	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe
2176	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1972 wrote to memory of 848	1972	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	30
PID 1972 wrote to memory of 848	1972	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	30
PID 1972 wrote to memory of 848	1972	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	30
PID 1972 wrote to memory of 848	1972	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	30
PID 1972 wrote to memory of 848	1972	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	30
PID 1972 wrote to memory of 848	1972	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	30
PID 1972 wrote to memory of 848	1972	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	30
PID 1972 wrote to memory of 848	1972	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	30
PID 1972 wrote to memory of 848	1972	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	30
PID 1972 wrote to memory of 848	1972	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	30
PID 1972 wrote to memory of 848	1972	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	30
PID 848 wrote to memory of 3004	848	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	33
PID 848 wrote to memory of 3004	848	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	33
PID 848 wrote to memory of 3004	848	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	33
PID 848 wrote to memory of 3004	848	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	33
PID 848 wrote to memory of 2608	848	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	34
PID 848 wrote to memory of 2608	848	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	34
PID 848 wrote to memory of 2608	848	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	34
PID 848 wrote to memory of 2608	848	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	34
PID 2608 wrote to memory of 2176	2608	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	35
PID 2608 wrote to memory of 2176	2608	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	35
PID 2608 wrote to memory of 2176	2608	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	35
PID 2608 wrote to memory of 2176	2608	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	35
PID 2608 wrote to memory of 2176	2608	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	35
PID 2608 wrote to memory of 2176	2608	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	35
PID 2608 wrote to memory of 2176	2608	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	35
PID 2608 wrote to memory of 2176	2608	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	35
PID 2608 wrote to memory of 2176	2608	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	35
PID 2608 wrote to memory of 2176	2608	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	35
PID 2608 wrote to memory of 2176	2608	651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe	35

C:\Users\Admin\AppData\Local\Temp\651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe
"C:\Users\Admin\AppData\Local\Temp\651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1972
- C:\Users\Admin\AppData\Local\Temp\651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe
  "C:\Users\Admin\AppData\Local\Temp\651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:848
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\2c24ced6-23ae-4945-9ded-03aba224e906" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:3004
- - C:\Users\Admin\AppData\Local\Temp\651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe
    "C:\Users\Admin\AppData\Local\Temp\651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2608
  - - C:\Users\Admin\AppData\Local\Temp\651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe
      "C:\Users\Admin\AppData\Local\Temp\651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:2176

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
1KB

MD5
c9be626e9715952e9b70f92f912b9787

SHA1
aa2e946d9ad9027172d0d321917942b7562d6abe

SHA256
c13e8d22800c200915f87f71c31185053e4e60ca25de2e41e160e09cd2d815d4

SHA512
7581b7c593785380e9db3ae760af85c1a889f607a3cd2aa5a2695a0e5a0fe8ee751578e88f7d8c997faeda804e2fc2655d859bee2832eace526ed4379edaa3f5

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8

Filesize
436B

MD5
971c514f84bba0785f80aa1c23edfd79

SHA1
732acea710a87530c6b08ecdf32a110d254a54c8

SHA256
f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895

SHA512
43dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
174B

MD5
244267a2a2b8ed1dc102ea9969c8581f

SHA1
2be0912aae968fd716b6a9d92e5c5010e99d872c

SHA256
70118c1598f3402a58c192175c7f92cfb0a07f0bccb756806ca1b5120dcd5796

SHA512
7758480364f5d556ab7316169555add4b634523ec566de505b797de62bee788d070ed1b65e8238df1482d358b5d3b9b3730b8b932a29a6af779a9f597c5f681f

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8

Filesize
170B

MD5
5eb71920e371b6606ed513b9e2ef0386

SHA1
3151fe70b2c738295bf9e79230f64ac98d622102

SHA256
7ab32c02b8504556efe1ae59118b491092428a85aeff70b6476fa013aa36a10a

SHA512
a500d9d7c1e8d044d1ded6f48261f7922103fbe81c31d526a766cbc832eb21687a0561e1aac7c088f22c190943ff1d686bea6608b079c29c3e3ff9ec8640043a

Download Submit
C:\Users\Admin\AppData\Local\2c24ced6-23ae-4945-9ded-03aba224e906\651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc.exe

Filesize
831KB

MD5
c3804647168d439928c2ca4019d87609

SHA1
ceb7a332a4ed40878a2c381fcf76fcd06528df65

SHA256
651bf6dc2ce11fbbda045ac186ab58ac3d691f8d28dc811f2b1552fe74b275cc

SHA512
d15fd9303f231915add3ff5cf696d1a5ad90d049f15355337bacf1867e2b968319de7b43de1c4e5c8f3eb8dfbca15766f79b2143e21bcdc14b602b43f4db939f

Download Submit
C:\Users\Admin\AppData\Local\Temp\CabCE76.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
memory/848-4-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/848-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/848-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/848-9-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/848-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1972-8-0x0000000004130000-0x00000000041C1000-memory.dmp

Filesize
580KB

Download
memory/1972-0-0x0000000004130000-0x00000000041C1000-memory.dmp

Filesize
580KB

Download
memory/1972-2-0x0000000005930000-0x0000000005A4B000-memory.dmp

Filesize
1.1MB

Download
memory/1972-1-0x0000000004130000-0x00000000041C1000-memory.dmp

Filesize
580KB

Download
memory/2176-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2176-44-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2176-43-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2176-45-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2176-49-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2176-52-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2176-51-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2176-53-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2608-28-0x0000000000220000-0x00000000002B1000-memory.dmp

Filesize
580KB

Download