djvu | 0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746

Analysis

max time kernel
144s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
25/04/2024, 01:06

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General

Target
0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe
Size 763KB
Sample240425-bf868scf7t
SHA256 0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746
MD5 106c2cfb1162fc8fe3cef0958474f1c3
SHA1 c63e3e70248ac3dbd45cd2a6d51a55e9747fd6e4
SHA512 aeb7d480088432d79ae6f963819e07c6119a90fd8a684887336fccbef1f43d8ace838c0862128709dc3daf527a75658c67618cf399eef8b4e2863189ae3d7557
SSDEEP 12288:IWYUVmfw2hn7uv+uZARVOAzft8cC1yn1j8Se+isLF6JiPvt6KfGfxKno:1MfNhnGWRHzfGSn1S+isLF6Jgvt6K+fj
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://cajgtus.com/test2/get.php

Attributes

extension
.bgzq
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: 0864PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 8 IoCs

resource	yara_rule
behavioral2/memory/3484-2-0x0000000005DB0000-0x0000000005ECB000-memory.dmp	family_djvu
behavioral2/memory/736-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/736-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/736-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/736-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/212-18-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/736-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/212-19-0x0000000000400000-0x0000000000537000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1904	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-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f94e208b-0d3b-48bc-9814-553dcfe5c45f\\0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe\" --AutoStart"	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.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
5	api.2ip.ua
8	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3484 set thread context of 736	3484	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	91
PID 432 set thread context of 212	432	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	95

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
876	212	WerFault.exe	95

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
736	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe
736	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3484 wrote to memory of 736	3484	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	91
PID 3484 wrote to memory of 736	3484	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	91
PID 3484 wrote to memory of 736	3484	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	91
PID 3484 wrote to memory of 736	3484	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	91
PID 3484 wrote to memory of 736	3484	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	91
PID 3484 wrote to memory of 736	3484	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	91
PID 3484 wrote to memory of 736	3484	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	91
PID 3484 wrote to memory of 736	3484	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	91
PID 3484 wrote to memory of 736	3484	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	91
PID 3484 wrote to memory of 736	3484	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	91
PID 736 wrote to memory of 1904	736	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	92
PID 736 wrote to memory of 1904	736	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	92
PID 736 wrote to memory of 1904	736	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	92
PID 736 wrote to memory of 432	736	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	93
PID 736 wrote to memory of 432	736	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	93
PID 736 wrote to memory of 432	736	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	93
PID 432 wrote to memory of 212	432	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	95
PID 432 wrote to memory of 212	432	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	95
PID 432 wrote to memory of 212	432	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	95
PID 432 wrote to memory of 212	432	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	95
PID 432 wrote to memory of 212	432	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	95
PID 432 wrote to memory of 212	432	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	95
PID 432 wrote to memory of 212	432	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	95
PID 432 wrote to memory of 212	432	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	95
PID 432 wrote to memory of 212	432	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	95
PID 432 wrote to memory of 212	432	0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe	95

C:\Users\Admin\AppData\Local\Temp\0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe
"C:\Users\Admin\AppData\Local\Temp\0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3484
- C:\Users\Admin\AppData\Local\Temp\0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe
  "C:\Users\Admin\AppData\Local\Temp\0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:736
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\f94e208b-0d3b-48bc-9814-553dcfe5c45f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1904
- - C:\Users\Admin\AppData\Local\Temp\0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe
    "C:\Users\Admin\AppData\Local\Temp\0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:432
  - - C:\Users\Admin\AppData\Local\Temp\0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe
      "C:\Users\Admin\AppData\Local\Temp\0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:212
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 212 -s 568
        5⤵
        Program crash
        
        PID:876

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 212 -ip 212
1⤵
PID:3076

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4476 --field-trial-handle=2656,i,16940681401824032220,151921362336696246,262144 --variations-seed-version /prefetch:8
1⤵
PID:3824

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

0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe

Path C:\Users\Admin\AppData\Local\f94e208b-0d3b-48bc-9814-553dcfe5c45f\0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746.exe
Size 763KB
SHA256 0e40646d6311552a7f6e7a386a06421d97de655f65b099e455cf22db10afd746
MD5 106c2cfb1162fc8fe3cef0958474f1c3
SHA1 c63e3e70248ac3dbd45cd2a6d51a55e9747fd6e4
SHA512 aeb7d480088432d79ae6f963819e07c6119a90fd8a684887336fccbef1f43d8ace838c0862128709dc3daf527a75658c67618cf399eef8b4e2863189ae3d7557
SSDEEP 12288:IWYUVmfw2hn7uv+uZARVOAzft8cC1yn1j8Se+isLF6JiPvt6KfGfxKno:1MfNhnGWRHzfGSn1S+isLF6Jgvt6K+fj
MD5 SHA1 SHA512 SSDEEP

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memory/212-18-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/212-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/212-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/432-16-0x0000000004620000-0x00000000046C0000-memory.dmp

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memory/736-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/736-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/736-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/736-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/736-20-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3484-1-0x0000000004570000-0x0000000004607000-memory.dmp

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memory/3484-2-0x0000000005DB0000-0x0000000005ECB000-memory.dmp

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