djvu | 39974fcabb25868f53048b562a7a03792ba7b5771ab6c055b837df920d04b307

Resubmissions

20/02/2024, 00:15

240220-akchdsgd9710

13/02/2024, 15:51

240213-tavqrscf6y10

Analysis

max time kernel
142s
max time network
194s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
20/02/2024, 00:15

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General

Target
9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe
Size 729KB
Sample240220-akchdsgd97
SHA256 9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637
MD5 d473778b0f10692a2fb1ef33d26f5759
SHA1 c1e422e12cc1a23edad6e5d34bba0187d3175627
SHA512 e2052b4ca7d8aef7785ba16b87f2e54a7330d2fae04a7ac42069584063063e7931d3c1b2d31ad62ab8c27a118dfef1ed081cd1a5fa3ce5c7d61d6a926b898ba8
SSDEEP 12288:NPUee0SgrdwElQKLzLlULuysWc3QAivoYKEwQs2q/eTNSfP6OBFV:NPU07rdZXvisWcgjvorq6KNKBFV
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.lkhy
offline_id
OxV6DGl22io8sqMOW1zCCOlzPiv4f1Vqzw7Y8zt1
payload_url
http://brusuax.com/dl/build2.exe

http://habrafa.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://we.tl/t-uNdL2KHHdy 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: 0851ASdw

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral2/memory/4328-2-0x00000000023A0000-0x00000000024BB000-memory.dmp	family_djvu
behavioral2/memory/1732-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1732-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1732-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1732-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1732-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2360-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2360-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2360-25-0x0000000000400000-0x0000000000537000-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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2248	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-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\19793dc9-0285-40b1-89a5-cc35f869359f\\9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe\" --AutoStart"	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe

Looks up external IP address via web service 2 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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4328 set thread context of 1732	4328	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	84
PID 1592 set thread context of 2360	1592	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	88

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
2204	2360	WerFault.exe	88

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1732	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe
1732	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4328 wrote to memory of 1732	4328	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	84
PID 4328 wrote to memory of 1732	4328	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	84
PID 4328 wrote to memory of 1732	4328	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	84
PID 4328 wrote to memory of 1732	4328	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	84
PID 4328 wrote to memory of 1732	4328	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	84
PID 4328 wrote to memory of 1732	4328	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	84
PID 4328 wrote to memory of 1732	4328	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	84
PID 4328 wrote to memory of 1732	4328	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	84
PID 4328 wrote to memory of 1732	4328	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	84
PID 4328 wrote to memory of 1732	4328	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	84
PID 1732 wrote to memory of 2248	1732	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	85
PID 1732 wrote to memory of 2248	1732	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	85
PID 1732 wrote to memory of 2248	1732	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	85
PID 1732 wrote to memory of 1592	1732	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	86
PID 1732 wrote to memory of 1592	1732	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	86
PID 1732 wrote to memory of 1592	1732	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	86
PID 1592 wrote to memory of 2360	1592	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	88
PID 1592 wrote to memory of 2360	1592	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	88
PID 1592 wrote to memory of 2360	1592	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	88
PID 1592 wrote to memory of 2360	1592	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	88
PID 1592 wrote to memory of 2360	1592	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	88
PID 1592 wrote to memory of 2360	1592	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	88
PID 1592 wrote to memory of 2360	1592	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	88
PID 1592 wrote to memory of 2360	1592	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	88
PID 1592 wrote to memory of 2360	1592	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	88
PID 1592 wrote to memory of 2360	1592	9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe	88

C:\Users\Admin\AppData\Local\Temp\9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe
"C:\Users\Admin\AppData\Local\Temp\9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4328
- C:\Users\Admin\AppData\Local\Temp\9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe
  "C:\Users\Admin\AppData\Local\Temp\9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1732
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\19793dc9-0285-40b1-89a5-cc35f869359f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2248
- - C:\Users\Admin\AppData\Local\Temp\9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe
    "C:\Users\Admin\AppData\Local\Temp\9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1592
  - - C:\Users\Admin\AppData\Local\Temp\9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe
      "C:\Users\Admin\AppData\Local\Temp\9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:2360
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2360 -s 568
        5⤵
        Program crash
        
        PID:2204

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 204 -p 2360 -ip 2360
1⤵
PID:4356

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:1660

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe

Path C:\Users\Admin\AppData\Local\19793dc9-0285-40b1-89a5-cc35f869359f\9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637.exe
Size 729KB
SHA256 9737047a6cf9c18ad4eb8eff4d7b090453dd69d1b64f0c2ffe7a5deab121e637
MD5 d473778b0f10692a2fb1ef33d26f5759
SHA1 c1e422e12cc1a23edad6e5d34bba0187d3175627
SHA512 e2052b4ca7d8aef7785ba16b87f2e54a7330d2fae04a7ac42069584063063e7931d3c1b2d31ad62ab8c27a118dfef1ed081cd1a5fa3ce5c7d61d6a926b898ba8
SSDEEP 12288:NPUee0SgrdwElQKLzLlULuysWc3QAivoYKEwQs2q/eTNSfP6OBFV:NPU07rdZXvisWcgjvorq6KNKBFV
MD5 SHA1 SHA512 SSDEEP

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memory/1592-20-0x00000000020F0000-0x000000000218F000-memory.dmp

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memory/1732-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1732-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1732-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1732-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1732-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2360-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2360-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2360-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4328-1-0x0000000002290000-0x0000000002327000-memory.dmp

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memory/4328-2-0x00000000023A0000-0x00000000024BB000-memory.dmp

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