djvu | c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d

General

Target

c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe
Size

825KB
MD5

a396fe245f20167c4ca851964a04ed82
SHA1

649c7f054b8ea9ea85b2471e48c16256ff9bdb06
SHA256

c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d
SHA512

adf814dbdf0232f6fc600d80c8931a603807902ac64214fc1a6f7af4611f3a539edd9e08eb219b767f9e7693d8423e3943d0bccc9c10454b81a8a3529a2d519a
SSDEEP

12288:+e7f6+LF0YaGXLrS/Kxs/al3diVHJQqYmjXiHIqluOiwuvE1CDpPksEWo:+e7HKYafxilEVHJPYmioqluOUc2Zo

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://sajdfue.com/test2/get.php

Attributes

extension
.uazq
offline_id
Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://sajdfue.com/files/1/build3.exe
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral1/memory/4732-2-0x0000000004AC0000-0x0000000004BDB000-memory.dmp	family_djvu
behavioral1/memory/4288-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4288-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4288-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4288-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4288-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3636-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3636-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3636-23-0x0000000000400000-0x0000000000537000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\International\Geo\Nation	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
5048	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-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\21109f57-f652-48a3-a5e2-9d23166a34c6\\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe\" --AutoStart"	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.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
7	api.2ip.ua
8	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4732 set thread context of 4288	4732	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	88
PID 4380 set thread context of 3636	4380	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	94

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
1324	3636	WerFault.exe	94

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4288	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe
4288	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4732 wrote to memory of 4288	4732	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	88
PID 4732 wrote to memory of 4288	4732	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	88
PID 4732 wrote to memory of 4288	4732	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	88
PID 4732 wrote to memory of 4288	4732	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	88
PID 4732 wrote to memory of 4288	4732	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	88
PID 4732 wrote to memory of 4288	4732	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	88
PID 4732 wrote to memory of 4288	4732	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	88
PID 4732 wrote to memory of 4288	4732	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	88
PID 4732 wrote to memory of 4288	4732	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	88
PID 4732 wrote to memory of 4288	4732	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	88
PID 4288 wrote to memory of 5048	4288	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	89
PID 4288 wrote to memory of 5048	4288	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	89
PID 4288 wrote to memory of 5048	4288	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	89
PID 4288 wrote to memory of 4380	4288	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	90
PID 4288 wrote to memory of 4380	4288	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	90
PID 4288 wrote to memory of 4380	4288	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	90
PID 4380 wrote to memory of 3636	4380	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	94
PID 4380 wrote to memory of 3636	4380	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	94
PID 4380 wrote to memory of 3636	4380	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	94
PID 4380 wrote to memory of 3636	4380	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	94
PID 4380 wrote to memory of 3636	4380	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	94
PID 4380 wrote to memory of 3636	4380	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	94
PID 4380 wrote to memory of 3636	4380	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	94
PID 4380 wrote to memory of 3636	4380	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	94
PID 4380 wrote to memory of 3636	4380	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	94
PID 4380 wrote to memory of 3636	4380	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	94

C:\Users\Admin\AppData\Local\Temp\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe
"C:\Users\Admin\AppData\Local\Temp\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4732
- C:\Users\Admin\AppData\Local\Temp\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe
  "C:\Users\Admin\AppData\Local\Temp\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4288
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\21109f57-f652-48a3-a5e2-9d23166a34c6" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:5048
- - C:\Users\Admin\AppData\Local\Temp\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe
    "C:\Users\Admin\AppData\Local\Temp\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4380
  - - C:\Users\Admin\AppData\Local\Temp\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe
      "C:\Users\Admin\AppData\Local\Temp\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:3636
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3636 -s 568
        5⤵
        Program crash
        
        PID:1324

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 3636 -ip 3636
1⤵
PID:4984

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\21109f57-f652-48a3-a5e2-9d23166a34c6\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe

Filesize
825KB

MD5
a396fe245f20167c4ca851964a04ed82

SHA1
649c7f054b8ea9ea85b2471e48c16256ff9bdb06

SHA256
c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d

SHA512
adf814dbdf0232f6fc600d80c8931a603807902ac64214fc1a6f7af4611f3a539edd9e08eb219b767f9e7693d8423e3943d0bccc9c10454b81a8a3529a2d519a

Download Submit
memory/3636-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3636-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3636-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4288-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4288-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4288-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4288-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4288-15-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4380-18-0x00000000049C0000-0x0000000004A62000-memory.dmp

Filesize
648KB

Download
memory/4732-1-0x0000000004940000-0x00000000049E0000-memory.dmp

Filesize
640KB

Download
memory/4732-2-0x0000000004AC0000-0x0000000004BDB000-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