djvu | 451d380bb89f747dfcb24e342766037643e38f0dfea566099f2361af51a555ad

General

Target

bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe
Size

793KB
MD5

9fcdf0cfe8478a37bcf45a7ccd97da47
SHA1

d164d00b0692b68574f12acde245f5e501b69628
SHA256

bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a
SHA512

9ed1ca3375634baa8f91700d4d6388423d61ad4cc274caca8a6a83d01051a54a1dae501534fb40eebca48b57511095eb5b95c5dfce90ea5ccfc248b6c85837b3
SSDEEP

12288:VxyQdjSLkWghFdms3TVGJbkwPnxZJKQTZyeFxIlKPHy9XuKaw6qypd+sSuRMH:VIwSWFdmsjOPn8yZ8mHeu4u8sSuc

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.udla
offline_id
qwVQoIsE2xLety0oNWloOilSDuIBXJGK86LM3ot1
payload_url
http://zerit.top/dl/build2.exe

http://fuyt.org/files/1/build3.exe
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral2/memory/3284-2-0x0000000002460000-0x000000000257B000-memory.dmp	family_djvu
behavioral2/memory/1904-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1904-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1904-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1904-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1904-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4880-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4880-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4880-26-0x0000000000400000-0x0000000000537000-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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1084	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-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\647e86c9-22de-4157-a43e-bae0cd2fa0cd\\bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe\" --AutoStart"	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.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
4	api.2ip.ua
5	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3284 set thread context of 1904	3284	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	82
PID 1500 set thread context of 4880	1500	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	86

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
4028	4880	WerFault.exe	86

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	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1904	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe
1904	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3284 wrote to memory of 1904	3284	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	82
PID 3284 wrote to memory of 1904	3284	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	82
PID 3284 wrote to memory of 1904	3284	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	82
PID 3284 wrote to memory of 1904	3284	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	82
PID 3284 wrote to memory of 1904	3284	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	82
PID 3284 wrote to memory of 1904	3284	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	82
PID 3284 wrote to memory of 1904	3284	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	82
PID 3284 wrote to memory of 1904	3284	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	82
PID 3284 wrote to memory of 1904	3284	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	82
PID 3284 wrote to memory of 1904	3284	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	82
PID 1904 wrote to memory of 1084	1904	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	83
PID 1904 wrote to memory of 1084	1904	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	83
PID 1904 wrote to memory of 1084	1904	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	83
PID 1904 wrote to memory of 1500	1904	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	84
PID 1904 wrote to memory of 1500	1904	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	84
PID 1904 wrote to memory of 1500	1904	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	84
PID 1500 wrote to memory of 4880	1500	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	86
PID 1500 wrote to memory of 4880	1500	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	86
PID 1500 wrote to memory of 4880	1500	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	86
PID 1500 wrote to memory of 4880	1500	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	86
PID 1500 wrote to memory of 4880	1500	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	86
PID 1500 wrote to memory of 4880	1500	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	86
PID 1500 wrote to memory of 4880	1500	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	86
PID 1500 wrote to memory of 4880	1500	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	86
PID 1500 wrote to memory of 4880	1500	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	86
PID 1500 wrote to memory of 4880	1500	bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe	86

C:\Users\Admin\AppData\Local\Temp\bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe
"C:\Users\Admin\AppData\Local\Temp\bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3284
- C:\Users\Admin\AppData\Local\Temp\bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe
  "C:\Users\Admin\AppData\Local\Temp\bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.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:1904
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\647e86c9-22de-4157-a43e-bae0cd2fa0cd" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:1084
- - C:\Users\Admin\AppData\Local\Temp\bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe
    "C:\Users\Admin\AppData\Local\Temp\bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1500
  - - C:\Users\Admin\AppData\Local\Temp\bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe
      "C:\Users\Admin\AppData\Local\Temp\bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      PID:4880
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4880 -s 568
        5⤵
        Program crash
        
        PID:4028

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4880 -ip 4880
1⤵
PID:2844

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\647e86c9-22de-4157-a43e-bae0cd2fa0cd\bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a.exe

Filesize
793KB

MD5
9fcdf0cfe8478a37bcf45a7ccd97da47

SHA1
d164d00b0692b68574f12acde245f5e501b69628

SHA256
bd1789026d6010f1849075e14a07f168349ac7e9bbe154358a0e96f0435e8d9a

SHA512
9ed1ca3375634baa8f91700d4d6388423d61ad4cc274caca8a6a83d01051a54a1dae501534fb40eebca48b57511095eb5b95c5dfce90ea5ccfc248b6c85837b3

Download Submit
memory/1500-27-0x0000000000400000-0x000000000050B000-memory.dmp

Filesize
1.0MB

Download
memory/1500-21-0x0000000000400000-0x000000000050B000-memory.dmp

Filesize
1.0MB

Download
memory/1904-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1904-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1904-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1904-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1904-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3284-1-0x00000000022D0000-0x0000000002365000-memory.dmp

Filesize
596KB

Download
memory/3284-2-0x0000000002460000-0x000000000257B000-memory.dmp

Filesize
1.1MB

Download
memory/4880-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4880-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4880-26-0x0000000000400000-0x0000000000537000-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