djvu | b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc

Analysis

max time kernel
6s
max time network
9s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
20/10/2022, 14:58

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General

Target
b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe
Size 747KB
Sample221020-scj7daage5
SHA256 b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc
MD5 e85b76e6329d84a2deaf949a41f9f38b
SHA1 33683932dd9ab46ccf33177363b1143242a284bb
SHA512 d892265fd3abd2a92a3edf3df4f859144199a8c52eff4ac3dc5a34b5453b3e0c0acb880ea6114b756973318d9ab137a9866caf7a16529f98efe00e122084a5b6
SSDEEP 12288:1fAGqwm1NV+wdNNks+yQENphTJJkmbrBD+McvmnLPn//YOk0MBmTBa45Z:1IX1ldNNkwQENvjpd+Vmv/gOhfTf
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.tuis
offline_id
Uz66zEbmA32arcxwT81zZhkb23026oHz5iSp8qt1
payload_url
http://rgyui.top/dl/build2.exe

http://winnlinne.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. You can get and look video overview decrypt tool: https://we.tl/t-o7UXxOstmw 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: 0582Jhyjd

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 8 IoCs

resource	yara_rule
behavioral2/memory/1896-133-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1896-134-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2524-136-0x0000000002400000-0x000000000251B000-memory.dmp	family_djvu
behavioral2/memory/1896-137-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1896-138-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1896-142-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3624-145-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3624-147-0x0000000000400000-0x0000000000537000-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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1732	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c27ecec6-6757-474f-9c03-7bea0085d1b1\\b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe\" --AutoStart"	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.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
8	api.2ip.ua
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2524 set thread context of 1896	2524	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	83
PID 4800 set thread context of 3624	4800	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	87

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1896	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe
1896	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2524 wrote to memory of 1896	2524	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	83
PID 2524 wrote to memory of 1896	2524	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	83
PID 2524 wrote to memory of 1896	2524	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	83
PID 2524 wrote to memory of 1896	2524	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	83
PID 2524 wrote to memory of 1896	2524	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	83
PID 2524 wrote to memory of 1896	2524	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	83
PID 2524 wrote to memory of 1896	2524	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	83
PID 2524 wrote to memory of 1896	2524	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	83
PID 2524 wrote to memory of 1896	2524	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	83
PID 2524 wrote to memory of 1896	2524	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	83
PID 1896 wrote to memory of 1732	1896	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	84
PID 1896 wrote to memory of 1732	1896	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	84
PID 1896 wrote to memory of 1732	1896	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	84
PID 1896 wrote to memory of 4800	1896	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	85
PID 1896 wrote to memory of 4800	1896	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	85
PID 1896 wrote to memory of 4800	1896	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	85
PID 4800 wrote to memory of 3624	4800	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	87
PID 4800 wrote to memory of 3624	4800	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	87
PID 4800 wrote to memory of 3624	4800	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	87
PID 4800 wrote to memory of 3624	4800	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	87
PID 4800 wrote to memory of 3624	4800	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	87
PID 4800 wrote to memory of 3624	4800	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	87
PID 4800 wrote to memory of 3624	4800	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	87
PID 4800 wrote to memory of 3624	4800	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	87
PID 4800 wrote to memory of 3624	4800	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	87
PID 4800 wrote to memory of 3624	4800	b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe	87

C:\Users\Admin\AppData\Local\Temp\b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe
"C:\Users\Admin\AppData\Local\Temp\b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2524
- C:\Users\Admin\AppData\Local\Temp\b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe
  "C:\Users\Admin\AppData\Local\Temp\b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1896
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\c27ecec6-6757-474f-9c03-7bea0085d1b1" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1732
- - C:\Users\Admin\AppData\Local\Temp\b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe
    "C:\Users\Admin\AppData\Local\Temp\b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4800
  - - C:\Users\Admin\AppData\Local\Temp\b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe
      "C:\Users\Admin\AppData\Local\Temp\b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:3624

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

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

b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe

Path C:\Users\Admin\AppData\Local\c27ecec6-6757-474f-9c03-7bea0085d1b1\b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc.exe
Size 747KB
SHA256 b85952de1c0e0325eacb47eae98c2cf30af8009faa5d9ac6c77ef728bbeea3fc
MD5 e85b76e6329d84a2deaf949a41f9f38b
SHA1 33683932dd9ab46ccf33177363b1143242a284bb
SHA512 d892265fd3abd2a92a3edf3df4f859144199a8c52eff4ac3dc5a34b5453b3e0c0acb880ea6114b756973318d9ab137a9866caf7a16529f98efe00e122084a5b6
SSDEEP 12288:1fAGqwm1NV+wdNNks+yQENphTJJkmbrBD+McvmnLPn//YOk0MBmTBa45Z:1IX1ldNNkwQENvjpd+Vmv/gOhfTf
MD5 SHA1 SHA512 SSDEEP

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memory/1896-133-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1896-134-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1896-142-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1896-137-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1896-138-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2524-135-0x0000000000837000-0x00000000008C9000-memory.dmp

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memory/2524-136-0x0000000002400000-0x000000000251B000-memory.dmp

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memory/3624-145-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3624-147-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4800-146-0x00000000006F4000-0x0000000000786000-memory.dmp

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