djvu | 8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c

Analysis

max time kernel
291s
max time network
152s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
18/03/2025, 05:58

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General

Target

8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe
Size

763KB
MD5

19f46c713419f534c1532645b764c7b4
SHA1

f61f07d60704ff3d843596a6068b12f565bbed23
SHA256

8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c
SHA512

595bad474662dd1e1cdbdec310c96b42201443d07c975a96c8d0bddb6f08714b55383aec213106424201be6304e7c620e696c54ee70ff8027c11f1cf129a08f4
SSDEEP

12288:Ck30NbksICSr1WWknJ7RHWaqrx3A4VpRZZTLpu02zSa8wQR1oFqVDNmw/oI9wIG:kksIjr1EJ7R2aqN3zbFTM02zFW1TDLiz

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 13 IoCs

resource	yara_rule
behavioral1/memory/2896-6-0x0000000005980000-0x0000000005A9B000-memory.dmp	family_djvu
behavioral1/memory/2776-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2776-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2776-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2776-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/592-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/592-46-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/592-45-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/592-47-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/592-51-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/592-54-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/592-53-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/592-55-0x0000000000400000-0x0000000000537000-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
2344	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-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\43f9abd6-6f8e-4be5-91ff-257173123f42\\8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe\" --AutoStart"	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.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
9	api.2ip.ua
3	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2896 set thread context of 2776	2896	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	30
PID 2324 set thread context of 592	2324	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.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	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2776	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe
2776	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe
592	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe
592	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2896 wrote to memory of 2776	2896	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	30
PID 2896 wrote to memory of 2776	2896	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	30
PID 2896 wrote to memory of 2776	2896	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	30
PID 2896 wrote to memory of 2776	2896	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	30
PID 2896 wrote to memory of 2776	2896	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	30
PID 2896 wrote to memory of 2776	2896	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	30
PID 2896 wrote to memory of 2776	2896	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	30
PID 2896 wrote to memory of 2776	2896	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	30
PID 2896 wrote to memory of 2776	2896	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	30
PID 2896 wrote to memory of 2776	2896	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	30
PID 2896 wrote to memory of 2776	2896	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	30
PID 2776 wrote to memory of 2344	2776	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	31
PID 2776 wrote to memory of 2344	2776	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	31
PID 2776 wrote to memory of 2344	2776	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	31
PID 2776 wrote to memory of 2344	2776	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	31
PID 2776 wrote to memory of 2324	2776	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	32
PID 2776 wrote to memory of 2324	2776	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	32
PID 2776 wrote to memory of 2324	2776	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	32
PID 2776 wrote to memory of 2324	2776	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	32
PID 2324 wrote to memory of 592	2324	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	33
PID 2324 wrote to memory of 592	2324	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	33
PID 2324 wrote to memory of 592	2324	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	33
PID 2324 wrote to memory of 592	2324	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	33
PID 2324 wrote to memory of 592	2324	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	33
PID 2324 wrote to memory of 592	2324	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	33
PID 2324 wrote to memory of 592	2324	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	33
PID 2324 wrote to memory of 592	2324	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	33
PID 2324 wrote to memory of 592	2324	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	33
PID 2324 wrote to memory of 592	2324	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	33
PID 2324 wrote to memory of 592	2324	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	33

C:\Users\Admin\AppData\Local\Temp\8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe
"C:\Users\Admin\AppData\Local\Temp\8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2896
- C:\Users\Admin\AppData\Local\Temp\8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe
  "C:\Users\Admin\AppData\Local\Temp\8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2776
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\43f9abd6-6f8e-4be5-91ff-257173123f42" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2344
- - C:\Users\Admin\AppData\Local\Temp\8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe
    "C:\Users\Admin\AppData\Local\Temp\8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2324
  - - C:\Users\Admin\AppData\Local\Temp\8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe
      "C:\Users\Admin\AppData\Local\Temp\8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:592

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
3229a62abec5e95090d0a93880a4dfd0

SHA1
2384177599a0a7a7fad7d3f65f122b4cf4b4ddca

SHA256
cd394e2746b864a93cf540358cd73bba7881bd4d69ff66b303f09873d46aeb31

SHA512
2f25b1daa1e4ddb0fd9b97d20294bc2b530736f0fc939566d03f35dc3fec6e5275a1edd557c5c56699ecd75f10f64cc94b64cbe3a5893e2ee26b06a91a9412c1

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

Filesize
342B

MD5
02198a2ca9940c0fe7893c46e88aae53

SHA1
0c9df062e64d5aded06efc3145936136d8338578

SHA256
ec00f6ab38d4b804e7b5ee7a6f7058552961bb487b29026d37e8887246c21f63

SHA512
32a31bd70b86dc8b836a265f5b26ab059ce629a65a44f4b0cdd0383ab79dbbcc363a75068e9eec8456e81f7168b1926d7911db9b05f5b5da61690e73c98fa9a1

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

Filesize
170B

MD5
36073025cbb36db5f5e744773a41b787

SHA1
b80d7ac413ab882edfdfb5ca6e6912b97c8dfa95

SHA256
06b836896f4af8b1c2dac8f9018811a91085747f28661ca39cbefd851c3698eb

SHA512
66bfcec9931dfb4639e223815d9f63863851909dd630bc55c55c467519a0e0aed44ac6de07b12b230991e1a89e5e503d1ef6be212bec52d1bddf5b745732d117

Download Submit
C:\Users\Admin\AppData\Local\43f9abd6-6f8e-4be5-91ff-257173123f42\8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe

Filesize
763KB

MD5
19f46c713419f534c1532645b764c7b4

SHA1
f61f07d60704ff3d843596a6068b12f565bbed23

SHA256
8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c

SHA512
595bad474662dd1e1cdbdec310c96b42201443d07c975a96c8d0bddb6f08714b55383aec213106424201be6304e7c620e696c54ee70ff8027c11f1cf129a08f4

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab672C.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
memory/592-45-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/592-46-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/592-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/592-55-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/592-53-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/592-54-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/592-51-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/592-47-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2324-28-0x0000000000220000-0x00000000002B2000-memory.dmp

Filesize
584KB

Download
memory/2776-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2776-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2776-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2776-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2776-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2896-1-0x0000000000340000-0x00000000003D2000-memory.dmp

Filesize
584KB

Download
memory/2896-0-0x0000000000340000-0x00000000003D2000-memory.dmp

Filesize
584KB

Download
memory/2896-6-0x0000000005980000-0x0000000005A9B000-memory.dmp

Filesize
1.1MB

Download