djvu | 0e06e9585cc9db33ee999ca4de668ab64ef6e9fa928ae6541b2f1ec68ff09da8

max time kernel
148s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240730-en
resource tags

arch:x64arch:x86image:win10v2004-20240730-enlocale:en-usos:windows10-2004-x64system
submitted
31-07-2024 10:53

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General

Target

942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe
Size

732KB
MD5

31b1fe0aacf5fcbced44e89252d1d4b8
SHA1

3d56a02e23bbf2f6b3ac86db262391ccd2d06e5a
SHA256

942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38
SHA512

1b49741fab83d12bf0082c9ee070d999ab79860744322d755d7b5a53998ad6827d38306bb7d43763ae487ee64d451de5aec5aaab357422250174c4b8920add60
SSDEEP

12288:UhR9WptAc/LnqJc0LYBlaql0OxymXkDptSwUlq1Y4I+hHfyc:u9gtAcWfLYbOcep+Uyc

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://astdg.top/nddddhsspen6/get.php

Attributes

extension
.gujd
offline_id
NcBG8wI6Q1WFhUNlCRyjmrWGeGew2vvCKtJgKot1
payload_url
http://securebiz.org/dl/build2.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-mNr1oio2P6 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: 0316ewgfDd

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 11 IoCs

resource	yara_rule
behavioral23/memory/2096-2-0x0000000000CB0000-0x0000000000DCB000-memory.dmp	family_djvu
behavioral23/memory/748-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral23/memory/748-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral23/memory/748-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral23/memory/748-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral23/memory/748-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral23/memory/3352-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral23/memory/3352-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral23/memory/3352-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral23/memory/4028-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral23/memory/4028-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

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

Checks computer location settings 2 TTPs 1 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-1-5-21-3881032017-2947584075-2120384563-1000\Control Panel\International\Geo\Nation	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe

Executes dropped EXE 2 IoCs

pid	Process
1084	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe
4028	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1040	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-1-5-21-3881032017-2947584075-2120384563-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\5b9d08b4-d1ab-423b-a2b9-911efdd74f38\\942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe\" --AutoStart"	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.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
1	api.2ip.ua
2	api.2ip.ua
36	api.2ip.ua

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2096 set thread context of 748	2096	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	80
PID 4876 set thread context of 3352	4876	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	84
PID 1084 set thread context of 4028	1084	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	97

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2332	3352	WerFault.exe	84

System Location Discovery: System Language Discovery 1 TTPs 7 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	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
748	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe
748	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe
4028	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe
4028	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 2096 wrote to memory of 748	2096	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	80
PID 2096 wrote to memory of 748	2096	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	80
PID 2096 wrote to memory of 748	2096	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	80
PID 2096 wrote to memory of 748	2096	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	80
PID 2096 wrote to memory of 748	2096	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	80
PID 2096 wrote to memory of 748	2096	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	80
PID 2096 wrote to memory of 748	2096	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	80
PID 2096 wrote to memory of 748	2096	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	80
PID 2096 wrote to memory of 748	2096	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	80
PID 2096 wrote to memory of 748	2096	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	80
PID 748 wrote to memory of 1040	748	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	81
PID 748 wrote to memory of 1040	748	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	81
PID 748 wrote to memory of 1040	748	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	81
PID 748 wrote to memory of 4876	748	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	82
PID 748 wrote to memory of 4876	748	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	82
PID 748 wrote to memory of 4876	748	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	82
PID 4876 wrote to memory of 3352	4876	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	84
PID 4876 wrote to memory of 3352	4876	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	84
PID 4876 wrote to memory of 3352	4876	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	84
PID 4876 wrote to memory of 3352	4876	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	84
PID 4876 wrote to memory of 3352	4876	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	84
PID 4876 wrote to memory of 3352	4876	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	84
PID 4876 wrote to memory of 3352	4876	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	84
PID 4876 wrote to memory of 3352	4876	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	84
PID 4876 wrote to memory of 3352	4876	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	84
PID 4876 wrote to memory of 3352	4876	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	84
PID 1084 wrote to memory of 4028	1084	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	97
PID 1084 wrote to memory of 4028	1084	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	97
PID 1084 wrote to memory of 4028	1084	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	97
PID 1084 wrote to memory of 4028	1084	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	97
PID 1084 wrote to memory of 4028	1084	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	97
PID 1084 wrote to memory of 4028	1084	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	97
PID 1084 wrote to memory of 4028	1084	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	97
PID 1084 wrote to memory of 4028	1084	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	97
PID 1084 wrote to memory of 4028	1084	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	97
PID 1084 wrote to memory of 4028	1084	942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe	97

C:\Users\Admin\AppData\Local\Temp\942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe
"C:\Users\Admin\AppData\Local\Temp\942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2096
- C:\Users\Admin\AppData\Local\Temp\942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe
  "C:\Users\Admin\AppData\Local\Temp\942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:748
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\5b9d08b4-d1ab-423b-a2b9-911efdd74f38" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:1040
- - C:\Users\Admin\AppData\Local\Temp\942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe
    "C:\Users\Admin\AppData\Local\Temp\942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4876
  - - C:\Users\Admin\AppData\Local\Temp\942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe
      "C:\Users\Admin\AppData\Local\Temp\942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      PID:3352
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3352 -s 568
        5⤵
        Program crash
        
        PID:2332

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3352 -ip 3352
1⤵
PID:3652

C:\Users\Admin\AppData\Local\5b9d08b4-d1ab-423b-a2b9-911efdd74f38\942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe
C:\Users\Admin\AppData\Local\5b9d08b4-d1ab-423b-a2b9-911efdd74f38\942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe --Task
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1084
- C:\Users\Admin\AppData\Local\5b9d08b4-d1ab-423b-a2b9-911efdd74f38\942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe
  C:\Users\Admin\AppData\Local\5b9d08b4-d1ab-423b-a2b9-911efdd74f38\942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe --Task
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:4028

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

Query Registry

T1012

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
7fb5fa1534dcf77f2125b2403b30a0ee

SHA1
365d96812a69ac0a4611ea4b70a3f306576cc3ea

SHA256
33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f

SHA512
a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e

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
a8dbb7f4d5a25aa34bb07359d07295d2

SHA1
860099556b85815764d19f6fcafa60cb51053829

SHA256
4a50b1468b4086c091e93b1bf8f157be2c1ea3c181e88c94c14edf6315c5eaee

SHA512
90020ce7c9012c8f77a950f0412be69f40ec591ee7b7183ab905e10507ec355bfe0df332d9ceae3fe61a36d018dbfd155923d7518b64ddab4a280a4a26921cc5

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

Filesize
170B

MD5
62583f7031913f534b43f8bf313f25b7

SHA1
4fc0660f615d774cc93297139a75b237ba8ecf36

SHA256
65189e90794893fb47bca08404ad1d005d89cfc95b822f1533f5e35bc64e839f

SHA512
4894e71df473c63929b9c7a9a9d086c99cb491c965b8843302d728e697b5bc42a796a9a87f87c01184366606c1d3af7a211dcd1d9f557ae0bf8a0bd332c7c981

Download Submit
C:\Users\Admin\AppData\Local\5b9d08b4-d1ab-423b-a2b9-911efdd74f38\942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38.exe

Filesize
732KB

MD5
31b1fe0aacf5fcbced44e89252d1d4b8

SHA1
3d56a02e23bbf2f6b3ac86db262391ccd2d06e5a

SHA256
942263c89534d74459991db826caf2e9a187c074730f5c4f0f83f8c91e980e38

SHA512
1b49741fab83d12bf0082c9ee070d999ab79860744322d755d7b5a53998ad6827d38306bb7d43763ae487ee64d451de5aec5aaab357422250174c4b8920add60

Download Submit
memory/748-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/748-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/748-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/748-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/748-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2096-2-0x0000000000CB0000-0x0000000000DCB000-memory.dmp

Filesize
1.1MB

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memory/2096-1-0x0000000000BD0000-0x0000000000C6C000-memory.dmp

Filesize
624KB

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memory/3352-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

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memory/3352-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

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memory/3352-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

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memory/4028-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

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memory/4028-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

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memory/4876-27-0x0000000000400000-0x0000000000920000-memory.dmp

Filesize
5.1MB

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memory/4876-26-0x0000000000400000-0x0000000000920000-memory.dmp

Filesize
5.1MB

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