djvu | 455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2

Analysis

max time kernel
293s
max time network
158s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
18/03/2025, 03:09

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General

Target

455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
Size

831KB
MD5

33bc5b92658baf8f7a4dfc35c9994250
SHA1

30e9143d9d0c8def9bd176663e62049356cd94c9
SHA256

455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2
SHA512

11568d107f8a3de82001811acc0c71506b6e3631b5dd7fc1e62f5e71c7bc324b64b7c1902423cb1b2196c129b60571df189fd6a6516080de4ceeb42271a29136
SSDEEP

12288:RTipzPV+q9TaI+u/htKL1MoFzEKMQe+LfGR1l68u7E9:Rk/aZeh21wQTfa68u7Q

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://cajgtus.com/test1/get.php

Attributes

extension
.bgjs
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: 0863PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral1/memory/2832-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2832-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2492-5-0x0000000005A40000-0x0000000005B5B000-memory.dmp	family_djvu
behavioral1/memory/2832-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2832-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2680-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2680-45-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2680-46-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2680-47-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2680-51-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2680-54-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2680-53-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2680-55-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2680-56-0x0000000000400000-0x0000000000537000-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
2692	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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\950ad70b-4827-4d36-ad38-1fbc679d3fc4\\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe\" --AutoStart"	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.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
3	api.2ip.ua
4	api.2ip.ua
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2492 set thread context of 2832	2492	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	30
PID 2636 set thread context of 2680	2636	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	33

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	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2832	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
2832	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
2680	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
2680	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2492 wrote to memory of 2832	2492	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	30
PID 2492 wrote to memory of 2832	2492	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	30
PID 2492 wrote to memory of 2832	2492	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	30
PID 2492 wrote to memory of 2832	2492	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	30
PID 2492 wrote to memory of 2832	2492	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	30
PID 2492 wrote to memory of 2832	2492	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	30
PID 2492 wrote to memory of 2832	2492	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	30
PID 2492 wrote to memory of 2832	2492	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	30
PID 2492 wrote to memory of 2832	2492	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	30
PID 2492 wrote to memory of 2832	2492	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	30
PID 2492 wrote to memory of 2832	2492	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	30
PID 2832 wrote to memory of 2692	2832	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	31
PID 2832 wrote to memory of 2692	2832	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	31
PID 2832 wrote to memory of 2692	2832	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	31
PID 2832 wrote to memory of 2692	2832	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	31
PID 2832 wrote to memory of 2636	2832	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	32
PID 2832 wrote to memory of 2636	2832	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	32
PID 2832 wrote to memory of 2636	2832	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	32
PID 2832 wrote to memory of 2636	2832	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	32
PID 2636 wrote to memory of 2680	2636	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	33
PID 2636 wrote to memory of 2680	2636	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	33
PID 2636 wrote to memory of 2680	2636	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	33
PID 2636 wrote to memory of 2680	2636	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	33
PID 2636 wrote to memory of 2680	2636	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	33
PID 2636 wrote to memory of 2680	2636	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	33
PID 2636 wrote to memory of 2680	2636	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	33
PID 2636 wrote to memory of 2680	2636	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	33
PID 2636 wrote to memory of 2680	2636	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	33
PID 2636 wrote to memory of 2680	2636	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	33
PID 2636 wrote to memory of 2680	2636	455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe	33

C:\Users\Admin\AppData\Local\Temp\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
"C:\Users\Admin\AppData\Local\Temp\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2492
- C:\Users\Admin\AppData\Local\Temp\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
  "C:\Users\Admin\AppData\Local\Temp\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2832
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\950ad70b-4827-4d36-ad38-1fbc679d3fc4" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2692
- - C:\Users\Admin\AppData\Local\Temp\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
    "C:\Users\Admin\AppData\Local\Temp\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2636
  - - C:\Users\Admin\AppData\Local\Temp\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe
      "C:\Users\Admin\AppData\Local\Temp\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:2680

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
c22d0dab7d8d09734a571ad0df174def

SHA1
4768e8656b5918f181f72952cc2e26f13a743ea9

SHA256
be52a101c6646096824318ee7892a5047ddde138c07ae80655287a64098d249a

SHA512
2104d449bd5081a0daf9a26ceebfa30a275e2d022ed5741840de60cf2fed27ad2ec7a3312a8985d869d965f7e10c24df9a321f6fdb211abdfd7b4ae2802e9fb3

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

Filesize
342B

MD5
f37f73cc9b8d011bd6d058b70968ac3e

SHA1
f9e14e89b5b012b0f69eb99789365759a90ff725

SHA256
080a140f21845c528121f7a9112141d8218a2a1cd57b3eddfcf10504c1b2c893

SHA512
a62420a4e6db63c8e15fc141496beb3b45f6ef0e98c0679d65f33b7d1e2c7f2189375df27adb538c784cb5a060a887e4ca02d73a58d6bd36ec46cea2c52a6771

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

Filesize
170B

MD5
c0a4d90686d9e291cbf847fa3a6bfc09

SHA1
ecf0dfecb58f187ea70136154566bafe12cdd9db

SHA256
fa74317c1fa18134c2640a8ecedcd4d356b86ee02104ad4a4d84e5c72085e776

SHA512
8c8c70e0da5938cc62fa765524a31bf42294432e8833f3cb660f4e5db741e9df042cc136945e8ad2d78fca587267d81e305dd8c6e9e0cc2b516910e336f538f1

Download Submit
C:\Users\Admin\AppData\Local\950ad70b-4827-4d36-ad38-1fbc679d3fc4\455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2.exe

Filesize
831KB

MD5
33bc5b92658baf8f7a4dfc35c9994250

SHA1
30e9143d9d0c8def9bd176663e62049356cd94c9

SHA256
455f4327f9c1e07dec6538bce0edb0b935ad485e0f01cea4e68fa950b42891a2

SHA512
11568d107f8a3de82001811acc0c71506b6e3631b5dd7fc1e62f5e71c7bc324b64b7c1902423cb1b2196c129b60571df189fd6a6516080de4ceeb42271a29136

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab426D.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
memory/2492-0-0x0000000000320000-0x00000000003B1000-memory.dmp

Filesize
580KB

Download
memory/2492-4-0x0000000000320000-0x00000000003B1000-memory.dmp

Filesize
580KB

Download
memory/2492-5-0x0000000005A40000-0x0000000005B5B000-memory.dmp

Filesize
1.1MB

Download
memory/2636-28-0x0000000004130000-0x00000000041C1000-memory.dmp

Filesize
580KB

Download
memory/2680-51-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2680-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2680-56-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2680-55-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2680-53-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2680-54-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2680-45-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2680-46-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2680-47-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2832-1-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2832-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2832-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2832-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2832-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download