djvu | 2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84

General

Target

66d5df681876c_file010924.exe
Size

812KB
MD5

7972b08246e568495d9d116fc2d0b159
SHA1

3e12225494f08369858453fd9fc7481b4f788165
SHA256

2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84
SHA512

f0ead246f31d1badb3cd5fd67cb5b3081f027fdad44dd50364734d61722f1bc2cacb1ad5d842ca3f7000a2699e7bdf059a508b54a95f5e155ae274d70e833ff7
SSDEEP

24576:60oeRhL4Zihw/WaRupypku1ADMH0h0kT:60J482RuRuQMm

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.watz
offline_id
Lc3VTezPWbMhuVAQFzJUdeA68PwI7UDpc5aKHYt1
payload_url
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

Processes:

resource	yara_rule
behavioral3/memory/4516-2-0x0000000002360000-0x000000000247B000-memory.dmp	family_djvu
behavioral3/memory/4396-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral3/memory/4396-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral3/memory/4396-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral3/memory/4396-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral3/memory/4396-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral3/memory/2880-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral3/memory/2880-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral3/memory/2880-22-0x0000000000400000-0x0000000000537000-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

Processes:

66d5df681876c_file010924.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation	66d5df681876c_file010924.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

Processes:

icacls.exe

pid	Process
4232	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

66d5df681876c_file010924.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-945322488-2060912225-3527527000-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\49a9bca0-ea70-4562-9abd-b532c502e7d0\\66d5df681876c_file010924.exe\" --AutoStart"	66d5df681876c_file010924.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.

Processes:

flow	ioc
13	api.2ip.ua
12	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

66d5df681876c_file010924.exe66d5df681876c_file010924.exe

description	pid	Process	procid_target
PID 4516 set thread context of 4396	4516	66d5df681876c_file010924.exe	86
PID 2644 set thread context of 2880	2644	66d5df681876c_file010924.exe	93

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

System Information Discovery
T1082

Program crash 1 IoCs

Processes:

WerFault.exe

pid	pid_target	Process	procid_target
840	2880	WerFault.exe	93

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

Processes:

66d5df681876c_file010924.exe66d5df681876c_file010924.exe66d5df681876c_file010924.exe66d5df681876c_file010924.exeicacls.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	66d5df681876c_file010924.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	66d5df681876c_file010924.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	66d5df681876c_file010924.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	66d5df681876c_file010924.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

66d5df681876c_file010924.exe

pid	Process
4396	66d5df681876c_file010924.exe
4396	66d5df681876c_file010924.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

66d5df681876c_file010924.exe66d5df681876c_file010924.exe66d5df681876c_file010924.exe

description	pid	Process	procid_target
PID 4516 wrote to memory of 4396	4516	66d5df681876c_file010924.exe	86
PID 4516 wrote to memory of 4396	4516	66d5df681876c_file010924.exe	86
PID 4516 wrote to memory of 4396	4516	66d5df681876c_file010924.exe	86
PID 4516 wrote to memory of 4396	4516	66d5df681876c_file010924.exe	86
PID 4516 wrote to memory of 4396	4516	66d5df681876c_file010924.exe	86
PID 4516 wrote to memory of 4396	4516	66d5df681876c_file010924.exe	86
PID 4516 wrote to memory of 4396	4516	66d5df681876c_file010924.exe	86
PID 4516 wrote to memory of 4396	4516	66d5df681876c_file010924.exe	86
PID 4516 wrote to memory of 4396	4516	66d5df681876c_file010924.exe	86
PID 4516 wrote to memory of 4396	4516	66d5df681876c_file010924.exe	86
PID 4396 wrote to memory of 4232	4396	66d5df681876c_file010924.exe	88
PID 4396 wrote to memory of 4232	4396	66d5df681876c_file010924.exe	88
PID 4396 wrote to memory of 4232	4396	66d5df681876c_file010924.exe	88
PID 4396 wrote to memory of 2644	4396	66d5df681876c_file010924.exe	89
PID 4396 wrote to memory of 2644	4396	66d5df681876c_file010924.exe	89
PID 4396 wrote to memory of 2644	4396	66d5df681876c_file010924.exe	89
PID 2644 wrote to memory of 2880	2644	66d5df681876c_file010924.exe	93
PID 2644 wrote to memory of 2880	2644	66d5df681876c_file010924.exe	93
PID 2644 wrote to memory of 2880	2644	66d5df681876c_file010924.exe	93
PID 2644 wrote to memory of 2880	2644	66d5df681876c_file010924.exe	93
PID 2644 wrote to memory of 2880	2644	66d5df681876c_file010924.exe	93
PID 2644 wrote to memory of 2880	2644	66d5df681876c_file010924.exe	93
PID 2644 wrote to memory of 2880	2644	66d5df681876c_file010924.exe	93
PID 2644 wrote to memory of 2880	2644	66d5df681876c_file010924.exe	93
PID 2644 wrote to memory of 2880	2644	66d5df681876c_file010924.exe	93
PID 2644 wrote to memory of 2880	2644	66d5df681876c_file010924.exe	93

C:\Users\Admin\AppData\Local\Temp\66d5df681876c_file010924.exe
"C:\Users\Admin\AppData\Local\Temp\66d5df681876c_file010924.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4516
- C:\Users\Admin\AppData\Local\Temp\66d5df681876c_file010924.exe
  "C:\Users\Admin\AppData\Local\Temp\66d5df681876c_file010924.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:4396
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\49a9bca0-ea70-4562-9abd-b532c502e7d0" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:4232
- - C:\Users\Admin\AppData\Local\Temp\66d5df681876c_file010924.exe
    "C:\Users\Admin\AppData\Local\Temp\66d5df681876c_file010924.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2644
  - - C:\Users\Admin\AppData\Local\Temp\66d5df681876c_file010924.exe
      "C:\Users\Admin\AppData\Local\Temp\66d5df681876c_file010924.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      PID:2880
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2880 -s 568
        5⤵
        Program crash
        
        PID:840

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2880 -ip 2880
1⤵
PID:3744

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\49a9bca0-ea70-4562-9abd-b532c502e7d0\66d5df681876c_file010924.exe

Filesize
812KB

MD5
7972b08246e568495d9d116fc2d0b159

SHA1
3e12225494f08369858453fd9fc7481b4f788165

SHA256
2a6c90c8db27e6ac04c7e339dfe4b3c2d47a292bcf6fc1c5b4e0ae62fc81ff84

SHA512
f0ead246f31d1badb3cd5fd67cb5b3081f027fdad44dd50364734d61722f1bc2cacb1ad5d842ca3f7000a2699e7bdf059a508b54a95f5e155ae274d70e833ff7

Download Submit
memory/2644-25-0x0000000000400000-0x000000000065D000-memory.dmp

Filesize
2.4MB

Download
memory/2644-19-0x0000000000400000-0x000000000065D000-memory.dmp

Filesize
2.4MB

Download
memory/2880-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2880-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2880-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4396-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4396-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4396-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4396-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4396-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4516-1-0x0000000002280000-0x0000000002313000-memory.dmp

Filesize
588KB

Download
memory/4516-2-0x0000000002360000-0x000000000247B000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads