djvu | 6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725

Analysis

max time kernel
145s
max time network
123s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
10/03/2023, 20:13

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General

Target

6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe
Size

706KB
MD5

a298fc3cdb8bcf983b4ce7964d5df95b
SHA1

ef0a49e810353d60c2ff3b0f204567fdde99984d
SHA256

6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725
SHA512

c95c303541437e91c266d51526b88fbaded41064f5e8dc6ca092022b0ed3689c96d1553fbdcb35a7476b7dabba4f6f8a29fa10d9da4f024ebff908a83e7f4f3f
SSDEEP

12288:y7KCnqLEJMgTM25nTyGDXrEM3CpV70PR4XdKWSP8bZc//ppCGmv:yYLEpd5nTRnEM3CpWNWTbW+

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.cosw
offline_id
fTU4hYOJ0niv7WAg9utRTzxXv2TcoEvGPJhzIot1
payload_url
http://uaery.top/dl/build2.exe

http://zexeq.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-hhA4nKfJBj 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: 0658JOsie

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral1/memory/4260-134-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4260-135-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4260-137-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4156-136-0x0000000002390000-0x00000000024AB000-memory.dmp	family_djvu
behavioral1/memory/4260-138-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4260-147-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4396-151-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4396-152-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4396-153-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4396-156-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4396-157-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4396-161-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4396-164-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4396-163-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4396-165-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4396-166-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4396-185-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Downloads MZ/PE file

Checks computer location settings 2 TTPs 2 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-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe

Executes dropped EXE 1 IoCs

pid	Process
860	build3.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2360	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-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\7beab9d8-0ff4-44f9-8396-3f889de33b44\\6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe\" --AutoStart"	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.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
20	api.2ip.ua
22	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4156 set thread context of 4260	4156	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	85
PID 368 set thread context of 4396	368	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	90

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
1672	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4260	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe
4260	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe
4396	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe
4396	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe

Suspicious use of WriteProcessMemory 32 IoCs

description	pid	Process	procid_target
PID 4156 wrote to memory of 4260	4156	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	85
PID 4156 wrote to memory of 4260	4156	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	85
PID 4156 wrote to memory of 4260	4156	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	85
PID 4156 wrote to memory of 4260	4156	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	85
PID 4156 wrote to memory of 4260	4156	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	85
PID 4156 wrote to memory of 4260	4156	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	85
PID 4156 wrote to memory of 4260	4156	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	85
PID 4156 wrote to memory of 4260	4156	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	85
PID 4156 wrote to memory of 4260	4156	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	85
PID 4156 wrote to memory of 4260	4156	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	85
PID 4260 wrote to memory of 2360	4260	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	86
PID 4260 wrote to memory of 2360	4260	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	86
PID 4260 wrote to memory of 2360	4260	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	86
PID 4260 wrote to memory of 368	4260	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	87
PID 4260 wrote to memory of 368	4260	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	87
PID 4260 wrote to memory of 368	4260	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	87
PID 368 wrote to memory of 4396	368	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	90
PID 368 wrote to memory of 4396	368	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	90
PID 368 wrote to memory of 4396	368	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	90
PID 368 wrote to memory of 4396	368	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	90
PID 368 wrote to memory of 4396	368	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	90
PID 368 wrote to memory of 4396	368	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	90
PID 368 wrote to memory of 4396	368	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	90
PID 368 wrote to memory of 4396	368	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	90
PID 368 wrote to memory of 4396	368	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	90
PID 368 wrote to memory of 4396	368	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	90
PID 4396 wrote to memory of 860	4396	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	109
PID 4396 wrote to memory of 860	4396	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	109
PID 4396 wrote to memory of 860	4396	6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe	109
PID 860 wrote to memory of 1672	860	build3.exe	110
PID 860 wrote to memory of 1672	860	build3.exe	110
PID 860 wrote to memory of 1672	860	build3.exe	110

C:\Users\Admin\AppData\Local\Temp\6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe
"C:\Users\Admin\AppData\Local\Temp\6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4156
- C:\Users\Admin\AppData\Local\Temp\6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe
  "C:\Users\Admin\AppData\Local\Temp\6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4260
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\7beab9d8-0ff4-44f9-8396-3f889de33b44" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2360
- - C:\Users\Admin\AppData\Local\Temp\6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe
    "C:\Users\Admin\AppData\Local\Temp\6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:368
  - - C:\Users\Admin\AppData\Local\Temp\6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe
      "C:\Users\Admin\AppData\Local\Temp\6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Checks computer location settings
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of WriteProcessMemory
      PID:4396
    - - C:\Users\Admin\AppData\Local\6cf1df78-0128-4459-a815-82f6adb11ed8\build3.exe
        
        "C:\Users\Admin\AppData\Local\6cf1df78-0128-4459-a815-82f6adb11ed8\build3.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of WriteProcessMemory
        
        PID:860
      - C:\Windows\SysWOW64\schtasks.exe
        
        /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
        6⤵
        Creates scheduled task(s)
        
        PID:1672

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

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

C:\Users\Admin\AppData\Local\6cf1df78-0128-4459-a815-82f6adb11ed8\build3.exe

Filesize
9KB

MD5
9ead10c08e72ae41921191f8db39bc16

SHA1
abe3bce01cd34afc88e2c838173f8c2bd0090ae1

SHA256
8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

SHA512
aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

Download Submit
C:\Users\Admin\AppData\Local\6cf1df78-0128-4459-a815-82f6adb11ed8\build3.exe

Filesize
9KB

MD5
9ead10c08e72ae41921191f8db39bc16

SHA1
abe3bce01cd34afc88e2c838173f8c2bd0090ae1

SHA256
8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

SHA512
aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

Download Submit
C:\Users\Admin\AppData\Local\6cf1df78-0128-4459-a815-82f6adb11ed8\build3.exe

Filesize
9KB

MD5
9ead10c08e72ae41921191f8db39bc16

SHA1
abe3bce01cd34afc88e2c838173f8c2bd0090ae1

SHA256
8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

SHA512
aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

Download Submit
C:\Users\Admin\AppData\Local\7beab9d8-0ff4-44f9-8396-3f889de33b44\6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725.exe

Filesize
706KB

MD5
a298fc3cdb8bcf983b4ce7964d5df95b

SHA1
ef0a49e810353d60c2ff3b0f204567fdde99984d

SHA256
6e74d0d79dbd83e0993ef798a5569811b9d2d33d702f0f2793a035623f8f2725

SHA512
c95c303541437e91c266d51526b88fbaded41064f5e8dc6ca092022b0ed3689c96d1553fbdcb35a7476b7dabba4f6f8a29fa10d9da4f024ebff908a83e7f4f3f

Download Submit
memory/4156-136-0x0000000002390000-0x00000000024AB000-memory.dmp

Filesize
1.1MB

Download
memory/4260-134-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4260-135-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4260-137-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4260-138-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4260-147-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4396-156-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4396-157-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4396-161-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4396-164-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4396-163-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4396-165-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4396-166-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4396-153-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4396-185-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4396-152-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4396-151-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download