djvu | 2b31b3a43d6cf9f80d7b46f77dc3935ecdd7caeade5daebe1438417060fa60a0

Analysis

max time kernel
144s
max time network
143s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
21-12-2024 16:23

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General

Target

sample.exe
Size

775KB
MD5

b318b2664abf0d93433255643aaae35c
SHA1

9f8748a0459a6cef1a67c3b44c21f3eaa8e360f0
SHA256

4fbf13052ed4c7f12cda197e43998550d4b698d53ca08616929dbded612726c2
SHA512

f6dffa75f2caf6a57130e911461626adefa5301ef02ad00f9d606c155c983971c9b49e6905ed063c3becaf331aad2d694a68a7302316a33937c8f75592ff869f
SSDEEP

12288:uqyWSUBQv0EroDgRgp4LPTskElzS9zad8HT/AB+c9X+oeJzYf94SRZj1LJ+H:uqNQv0XDegs2SpSI0X+oB4SRZjxgH

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://fuyt.org/fhsgtsspen6/get.php

Attributes

extension
.uyjh
offline_id
LgcOIftV0dQfFBQStVNfb8BhHy8tHRPvXwSiFwt1
payload_url
http://zerit.top/dl/build2.exe

http://fuyt.org/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-FglTTmgzZT 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: 0443tOjkfd

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral1/memory/2692-2-0x0000000000660000-0x000000000077B000-memory.dmp	family_djvu
behavioral1/memory/2204-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2204-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2204-9-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2204-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2684-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2684-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2684-54-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2684-55-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2684-56-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2684-65-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2684-71-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2684-70-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2684-68-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2684-72-0x0000000000400000-0x0000000000537000-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
2804	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-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f35de3bf-1b14-4f17-bbae-c767f0c3002c\\sample.exe\" --AutoStart"	sample.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
6	api.2ip.ua
10	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2692 set thread context of 2204	2692	sample.exe	30
PID 2748 set thread context of 2684	2748	sample.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	sample.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sample.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sample.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sample.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2204	sample.exe
2204	sample.exe
2684	sample.exe
2684	sample.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2692 wrote to memory of 2204	2692	sample.exe	30
PID 2692 wrote to memory of 2204	2692	sample.exe	30
PID 2692 wrote to memory of 2204	2692	sample.exe	30
PID 2692 wrote to memory of 2204	2692	sample.exe	30
PID 2692 wrote to memory of 2204	2692	sample.exe	30
PID 2692 wrote to memory of 2204	2692	sample.exe	30
PID 2692 wrote to memory of 2204	2692	sample.exe	30
PID 2692 wrote to memory of 2204	2692	sample.exe	30
PID 2692 wrote to memory of 2204	2692	sample.exe	30
PID 2692 wrote to memory of 2204	2692	sample.exe	30
PID 2692 wrote to memory of 2204	2692	sample.exe	30
PID 2204 wrote to memory of 2804	2204	sample.exe	33
PID 2204 wrote to memory of 2804	2204	sample.exe	33
PID 2204 wrote to memory of 2804	2204	sample.exe	33
PID 2204 wrote to memory of 2804	2204	sample.exe	33
PID 2204 wrote to memory of 2748	2204	sample.exe	34
PID 2204 wrote to memory of 2748	2204	sample.exe	34
PID 2204 wrote to memory of 2748	2204	sample.exe	34
PID 2204 wrote to memory of 2748	2204	sample.exe	34
PID 2748 wrote to memory of 2684	2748	sample.exe	35
PID 2748 wrote to memory of 2684	2748	sample.exe	35
PID 2748 wrote to memory of 2684	2748	sample.exe	35
PID 2748 wrote to memory of 2684	2748	sample.exe	35
PID 2748 wrote to memory of 2684	2748	sample.exe	35
PID 2748 wrote to memory of 2684	2748	sample.exe	35
PID 2748 wrote to memory of 2684	2748	sample.exe	35
PID 2748 wrote to memory of 2684	2748	sample.exe	35
PID 2748 wrote to memory of 2684	2748	sample.exe	35
PID 2748 wrote to memory of 2684	2748	sample.exe	35
PID 2748 wrote to memory of 2684	2748	sample.exe	35

C:\Users\Admin\AppData\Local\Temp\sample.exe
"C:\Users\Admin\AppData\Local\Temp\sample.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2692
- C:\Users\Admin\AppData\Local\Temp\sample.exe
  "C:\Users\Admin\AppData\Local\Temp\sample.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2204
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\f35de3bf-1b14-4f17-bbae-c767f0c3002c" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2804
- - C:\Users\Admin\AppData\Local\Temp\sample.exe
    "C:\Users\Admin\AppData\Local\Temp\sample.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2748
  - - C:\Users\Admin\AppData\Local\Temp\sample.exe
      "C:\Users\Admin\AppData\Local\Temp\sample.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:2684

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
67e486b2f148a3fca863728242b6273e

SHA1
452a84c183d7ea5b7c015b597e94af8eef66d44a

SHA256
facaf1c3a4bf232abce19a2d534e495b0d3adc7dbe3797d336249aa6f70adcfb

SHA512
d3a37da3bb10a9736dc03e8b2b49baceef5d73c026e2077b8ebc1b786f2c9b2f807e0aa13a5866cf3b3cafd2bc506242ef139c423eaffb050bbb87773e53881e

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
1701f435689d7c631ec0b5d88486518b

SHA1
b9b95750a4598bfb7ee4a1714d719ebd996acac6

SHA256
bc5252f38fd75ce4c4de9dbdc3c1eb16ee49b98624a378a14f1952dd30dbe35b

SHA512
08314ff7bc93b160a71ade64973396c02fa2da40faeac9cf316cebf4076874aea01cd90dc753f84ea15dcacc9933752dc793931522ed62e10f56207cb8a9fa68

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

Filesize
170B

MD5
8980f28928811946428265d0d1dd5be8

SHA1
0cf2c3bf09f4fea4cf5a28708a7df8875d929589

SHA256
b524f390a027c827dda2543ac804a32bbd3eebd125b17cbb09b6c3c321ea2d44

SHA512
c21d3265d41d7881295981b8e2fe08d04e291bdfb17592e87290cac97d347e8d2cc6607ceff37b78ead5061c076f543a6edeacaeac65c6e8091d66c79c196dc6

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab34D6.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\f35de3bf-1b14-4f17-bbae-c767f0c3002c\sample.exe

Filesize
775KB

MD5
b318b2664abf0d93433255643aaae35c

SHA1
9f8748a0459a6cef1a67c3b44c21f3eaa8e360f0

SHA256
4fbf13052ed4c7f12cda197e43998550d4b698d53ca08616929dbded612726c2

SHA512
f6dffa75f2caf6a57130e911461626adefa5301ef02ad00f9d606c155c983971c9b49e6905ed063c3becaf331aad2d694a68a7302316a33937c8f75592ff869f

Download Submit
memory/2204-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2204-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2204-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2204-9-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2204-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2684-40-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2684-71-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2684-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2684-72-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2684-68-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2684-70-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2684-65-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2684-56-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2684-55-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2684-54-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2692-1-0x00000000002C0000-0x0000000000352000-memory.dmp

Filesize
584KB

Download
memory/2692-2-0x0000000000660000-0x000000000077B000-memory.dmp

Filesize
1.1MB

Download
memory/2692-6-0x00000000002C0000-0x0000000000352000-memory.dmp

Filesize
584KB

Download
memory/2692-0-0x00000000002C0000-0x0000000000352000-memory.dmp

Filesize
584KB

Download
memory/2748-39-0x0000000000400000-0x00000000004CC000-memory.dmp

Filesize
816KB

Download
memory/2748-32-0x0000000000220000-0x00000000002B2000-memory.dmp

Filesize
584KB

Download
memory/2748-33-0x0000000000400000-0x00000000004CC000-memory.dmp

Filesize
816KB

Download