djvu | b57ca5f02071e18577f753660484a394b4a63186576e0348e56f6d95b7b6f2d2

General

Target

8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe
Size

820KB
MD5

c4967a7c3dbbd5ef935c0107222c8595
SHA1

c680d5bb7eef9d21d63f77728f8e164d486b6cb0
SHA256

8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d
SHA512

406af4dfab24c1f9c0725dab6b692c2600f0d2b75b1f5a219427495e0f8513d03af663ba468ce4cd96803face4692a8876eae331688cdd8d9bb5efcbfe796f04
SSDEEP

12288:Vb8IWTR2ndRD9wFYnPAdBcW/xnVr87w14XcFvjFFYqSYBMgmi:V9sAv2uIo2hVGG3FfYjY+gmi

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://acacaca.org/test1/get.php

Attributes

extension
.aawt
offline_id
MyudhIExJux2oRQXw95TT1oAPu7mvqRMzxr1eet1
payload_url
http://rgyui.top/dl/build2.exe

http://acacaca.org/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-4Xcf4IX21n 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: 0562Jhyjd

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral2/memory/3756-2-0x0000000002400000-0x000000000251B000-memory.dmp	family_djvu
behavioral2/memory/4248-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4248-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4248-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4248-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4248-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2768-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2768-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2768-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Djvu family
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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1752	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-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\85247ef3-0ac7-4472-b0df-d205e7a4fe78\\8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe\" --AutoStart"	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.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
14	api.2ip.ua
15	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3756 set thread context of 4248	3756	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	83
PID 1472 set thread context of 2768	1472	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	89

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
840	2768	WerFault.exe	89

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4248	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe
4248	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3756 wrote to memory of 4248	3756	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	83
PID 3756 wrote to memory of 4248	3756	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	83
PID 3756 wrote to memory of 4248	3756	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	83
PID 3756 wrote to memory of 4248	3756	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	83
PID 3756 wrote to memory of 4248	3756	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	83
PID 3756 wrote to memory of 4248	3756	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	83
PID 3756 wrote to memory of 4248	3756	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	83
PID 3756 wrote to memory of 4248	3756	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	83
PID 3756 wrote to memory of 4248	3756	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	83
PID 3756 wrote to memory of 4248	3756	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	83
PID 4248 wrote to memory of 1752	4248	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	85
PID 4248 wrote to memory of 1752	4248	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	85
PID 4248 wrote to memory of 1752	4248	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	85
PID 4248 wrote to memory of 1472	4248	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	86
PID 4248 wrote to memory of 1472	4248	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	86
PID 4248 wrote to memory of 1472	4248	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	86
PID 1472 wrote to memory of 2768	1472	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	89
PID 1472 wrote to memory of 2768	1472	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	89
PID 1472 wrote to memory of 2768	1472	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	89
PID 1472 wrote to memory of 2768	1472	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	89
PID 1472 wrote to memory of 2768	1472	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	89
PID 1472 wrote to memory of 2768	1472	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	89
PID 1472 wrote to memory of 2768	1472	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	89
PID 1472 wrote to memory of 2768	1472	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	89
PID 1472 wrote to memory of 2768	1472	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	89
PID 1472 wrote to memory of 2768	1472	8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe	89

C:\Users\Admin\AppData\Local\Temp\8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe
"C:\Users\Admin\AppData\Local\Temp\8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3756
- C:\Users\Admin\AppData\Local\Temp\8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe
  "C:\Users\Admin\AppData\Local\Temp\8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4248
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\85247ef3-0ac7-4472-b0df-d205e7a4fe78" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:1752
- - C:\Users\Admin\AppData\Local\Temp\8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe
    "C:\Users\Admin\AppData\Local\Temp\8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1472
  - - C:\Users\Admin\AppData\Local\Temp\8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe
      "C:\Users\Admin\AppData\Local\Temp\8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      PID:2768
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2768 -s 568
        5⤵
        Program crash
        
        PID:840

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2768 -ip 2768
1⤵
PID:3380

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\85247ef3-0ac7-4472-b0df-d205e7a4fe78\8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d.exe

Filesize
820KB

MD5
c4967a7c3dbbd5ef935c0107222c8595

SHA1
c680d5bb7eef9d21d63f77728f8e164d486b6cb0

SHA256
8e6ac7d17a31abf450dda741a65bef6ab53462954607b458c91bd3006740923d

SHA512
406af4dfab24c1f9c0725dab6b692c2600f0d2b75b1f5a219427495e0f8513d03af663ba468ce4cd96803face4692a8876eae331688cdd8d9bb5efcbfe796f04

Download Submit
memory/1472-22-0x0000000000400000-0x00000000004D3000-memory.dmp

Filesize
844KB

Download
memory/1472-19-0x0000000000400000-0x00000000004D3000-memory.dmp

Filesize
844KB

Download
memory/2768-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2768-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2768-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3756-1-0x0000000002220000-0x00000000022BD000-memory.dmp

Filesize
628KB

Download
memory/3756-2-0x0000000002400000-0x000000000251B000-memory.dmp

Filesize
1.1MB

Download
memory/4248-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4248-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4248-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4248-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4248-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads