djvu | a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e

General

Target

a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe
Size

737KB
MD5

4be84d2271fde324d48f5364ff65e12f
SHA1

124e6cb72a9340605227da0b4ea958e2e4f69de9
SHA256

a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e
SHA512

f35b53dc32c0d5399a3c35539934baf0acdac9fcd821c69223d1111fa17523e6455fc01ea2b82cfda50b1f6ca905ef4c67d113b5cb3aa66cd5ad0da6bef3f70b
SSDEEP

12288:P4a3i3PM6FctLclDaaS8Myn/QRGURpqipm9rudVZfejbJhNpojv:gAipcmlDtS85IRGUyicrU3WjbJh36

Score

10^/10

djvu vidar discovery persistence ransomware stealer

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.cdqw
offline_id
mMsRxMUuXypapZbGOAfxD9pczHmW8zVRP7Pgjwt1
payload_url
http://brusuax.com/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-99MNqXMrdS Price of private key and decrypt software is $1999. Discount 50% available if you contact us first 72 hours, that's price for you is $999. 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: 0840ASdw

rsa_pubkey.plain

Signatures

Detect Vidar Stealer 7 IoCs

stealer

resource	yara_rule
behavioral2/memory/1596-55-0x0000000000400000-0x000000000063D000-memory.dmp	family_vidar_v6
behavioral2/memory/396-54-0x00000000008C0000-0x00000000008EA000-memory.dmp	family_vidar_v6
behavioral2/memory/1596-53-0x0000000000400000-0x000000000063D000-memory.dmp	family_vidar_v6
behavioral2/memory/1596-49-0x0000000000400000-0x000000000063D000-memory.dmp	family_vidar_v6
behavioral2/memory/1596-61-0x0000000000400000-0x000000000063D000-memory.dmp	family_vidar_v6
behavioral2/memory/1596-63-0x0000000000400000-0x000000000063D000-memory.dmp	family_vidar_v6
behavioral2/memory/3980-107-0x00000000008C0000-0x00000000009C0000-memory.dmp	family_vidar_v6

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/2212-3-0x0000000002600000-0x000000000271B000-memory.dmp	family_djvu
behavioral2/memory/4764-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4764-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4764-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4764-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4764-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3568-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3568-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3568-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1512-20-0x00000000023D0000-0x0000000002465000-memory.dmp	family_djvu
behavioral2/memory/3568-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3568-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3568-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3568-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3568-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3568-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3568-75-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Downloads MZ/PE file

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3420	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-1-5-21-3934047325-4097474570-3437169968-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\192e64a6-9f9b-4580-89c3-8fda17656f90\\a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe\" --AutoStart"	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.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
11	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2212 set thread context of 4764	2212	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	74
PID 1512 set thread context of 3568	1512	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	78

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
1588	1596	WerFault.exe	80

Creates scheduled task(s) 1 TTPs 2 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
3344	schtasks.exe
608	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4764	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe
4764	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2212 wrote to memory of 4764	2212	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	74
PID 2212 wrote to memory of 4764	2212	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	74
PID 2212 wrote to memory of 4764	2212	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	74
PID 2212 wrote to memory of 4764	2212	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	74
PID 2212 wrote to memory of 4764	2212	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	74
PID 2212 wrote to memory of 4764	2212	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	74
PID 2212 wrote to memory of 4764	2212	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	74
PID 2212 wrote to memory of 4764	2212	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	74
PID 2212 wrote to memory of 4764	2212	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	74
PID 2212 wrote to memory of 4764	2212	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	74
PID 4764 wrote to memory of 3420	4764	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	77
PID 4764 wrote to memory of 3420	4764	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	77
PID 4764 wrote to memory of 3420	4764	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	77
PID 4764 wrote to memory of 1512	4764	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	76
PID 4764 wrote to memory of 1512	4764	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	76
PID 4764 wrote to memory of 1512	4764	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	76
PID 1512 wrote to memory of 3568	1512	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	78
PID 1512 wrote to memory of 3568	1512	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	78
PID 1512 wrote to memory of 3568	1512	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	78
PID 1512 wrote to memory of 3568	1512	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	78
PID 1512 wrote to memory of 3568	1512	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	78
PID 1512 wrote to memory of 3568	1512	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	78
PID 1512 wrote to memory of 3568	1512	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	78
PID 1512 wrote to memory of 3568	1512	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	78
PID 1512 wrote to memory of 3568	1512	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	78
PID 1512 wrote to memory of 3568	1512	a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe	78

C:\Users\Admin\AppData\Local\Temp\a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe
"C:\Users\Admin\AppData\Local\Temp\a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2212
- C:\Users\Admin\AppData\Local\Temp\a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe
  "C:\Users\Admin\AppData\Local\Temp\a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4764
- - C:\Users\Admin\AppData\Local\Temp\a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe
    "C:\Users\Admin\AppData\Local\Temp\a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1512
  - - C:\Users\Admin\AppData\Local\Temp\a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe
      "C:\Users\Admin\AppData\Local\Temp\a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:3568
    - - C:\Users\Admin\AppData\Local\0c876f8c-134f-473e-8a32-2792e7dd85ac\build2.exe
        
        "C:\Users\Admin\AppData\Local\0c876f8c-134f-473e-8a32-2792e7dd85ac\build2.exe"
        5⤵
        
        PID:396
      - C:\Users\Admin\AppData\Local\0c876f8c-134f-473e-8a32-2792e7dd85ac\build2.exe
        
        "C:\Users\Admin\AppData\Local\0c876f8c-134f-473e-8a32-2792e7dd85ac\build2.exe"
        6⤵
        
        PID:1596
        
        C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 1596 -s 2076
        7⤵
        Program crash
        
        PID:1588
    - - C:\Users\Admin\AppData\Local\0c876f8c-134f-473e-8a32-2792e7dd85ac\build3.exe
        
        "C:\Users\Admin\AppData\Local\0c876f8c-134f-473e-8a32-2792e7dd85ac\build3.exe"
        5⤵
        
        PID:3112
      - C:\Users\Admin\AppData\Local\0c876f8c-134f-473e-8a32-2792e7dd85ac\build3.exe
        
        "C:\Users\Admin\AppData\Local\0c876f8c-134f-473e-8a32-2792e7dd85ac\build3.exe"
        6⤵
        
        PID:1148
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\192e64a6-9f9b-4580-89c3-8fda17656f90" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3420

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"
1⤵
- Creates scheduled task(s)
PID:3344

C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
1⤵
PID:3980
- C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
  C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
  2⤵
  PID:4244

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"
1⤵
- Creates scheduled task(s)
PID:608

C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
1⤵
PID:804
- C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
  C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
  2⤵
  PID:4240

C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
1⤵
PID:3608
- C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
  C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
  2⤵
  PID:1616

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe

Filesize
299KB

MD5
41b883a061c95e9b9cb17d4ca50de770

SHA1
1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad

SHA256
fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

SHA512
cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319

Download Submit
memory/396-64-0x00000000008C0000-0x00000000008EA000-memory.dmp

Filesize
168KB

Download
memory/396-54-0x00000000008C0000-0x00000000008EA000-memory.dmp

Filesize
168KB

Download
memory/396-52-0x0000000000970000-0x0000000000A70000-memory.dmp

Filesize
1024KB

Download
memory/804-131-0x0000000000970000-0x0000000000A70000-memory.dmp

Filesize
1024KB

Download
memory/1148-83-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1148-88-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1148-90-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1148-91-0x0000000000410000-0x00000000004D5000-memory.dmp

Filesize
788KB

Download
memory/1512-20-0x00000000023D0000-0x0000000002465000-memory.dmp

Filesize
596KB

Download
memory/1596-55-0x0000000000400000-0x000000000063D000-memory.dmp

Filesize
2.2MB

Download
memory/1596-63-0x0000000000400000-0x000000000063D000-memory.dmp

Filesize
2.2MB

Download
memory/1596-61-0x0000000000400000-0x000000000063D000-memory.dmp

Filesize
2.2MB

Download
memory/1596-49-0x0000000000400000-0x000000000063D000-memory.dmp

Filesize
2.2MB

Download
memory/1596-53-0x0000000000400000-0x000000000063D000-memory.dmp

Filesize
2.2MB

Download
memory/2212-3-0x0000000002600000-0x000000000271B000-memory.dmp

Filesize
1.1MB

Download
memory/2212-1-0x0000000002500000-0x0000000002595000-memory.dmp

Filesize
596KB

Download
memory/3112-87-0x0000000000810000-0x0000000000814000-memory.dmp

Filesize
16KB

Download
memory/3112-86-0x00000000009F9000-0x0000000000A0A000-memory.dmp

Filesize
68KB

Download
memory/3568-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3568-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3568-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3568-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3568-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3568-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3568-75-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3568-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3568-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3568-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3608-157-0x000000000088E000-0x000000000089E000-memory.dmp

Filesize
64KB

Download
memory/3980-107-0x00000000008C0000-0x00000000009C0000-memory.dmp

Filesize
1024KB

Download
memory/4764-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4764-2-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4764-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4764-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4764-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads