djvu | 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83

General

Target

444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
Size

780KB
MD5

f4c37292b365c19e6d2feeb6a17c4049
SHA1

a7c201719a6c4e58f57baa2a88b110d72f3daefe
SHA256

444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83
SHA512

8436f1f96c2ea3487e1205d2f0dbf8db33fc622a9d863f39402802a8c16bb05897477ba58d57fcb7d7a6bb265c52a25331ac5505dd3ac2c6b3fc2823eb56f805
SSDEEP

12288:6DcWGLixjy0li5QMCgpMeahQ+siBwpBezGbkhvYesVmKiOAfc4Cz9fA1iqCD:6iily4i3CgeSKBtXKiMt9fa8D

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.bgjs
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
payload_url
http://sdfjhuz.com/dl/build2.exe

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

Signatures

Detected Djvu ransomware 9 IoCs

Processes:

resource	yara_rule
behavioral2/memory/864-2-0x0000000005DB0000-0x0000000005ECB000-memory.dmp	family_djvu
behavioral2/memory/2916-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2916-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2916-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2916-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4192-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4192-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2916-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4192-26-0x0000000000400000-0x0000000000537000-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:

444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

1188 icacls.exe

pid	process
1188	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\0addb413-5841-4228-959f-10e13c7048f2\\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe\" --AutoStart"	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.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

1 api.2ip.ua
2 api.2ip.ua

flow	ioc
1	api.2ip.ua
2	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe

description	pid	process	target process
PID 864 set thread context of 2916	864	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
PID 4012 set thread context of 4192	4012	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe

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 target process

4492 4192 WerFault.exe 444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe

pid	pid_target	process	target process
4492	4192	WerFault.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe

pid	process
2916	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
2916	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe

C:\Users\Admin\AppData\Local\Temp\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
"C:\Users\Admin\AppData\Local\Temp\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:864
- C:\Users\Admin\AppData\Local\Temp\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
  "C:\Users\Admin\AppData\Local\Temp\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2916
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\0addb413-5841-4228-959f-10e13c7048f2" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1188
- - C:\Users\Admin\AppData\Local\Temp\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
    "C:\Users\Admin\AppData\Local\Temp\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4012
  - - C:\Users\Admin\AppData\Local\Temp\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
      "C:\Users\Admin\AppData\Local\Temp\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:4192
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4192 -s 568
        5⤵
        Program crash
        
        PID:4492

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 4192 -ip 4192
1⤵
PID:2356

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4004 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:8
1⤵
PID:1772

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\0addb413-5841-4228-959f-10e13c7048f2\444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe

Filesize
780KB

MD5
f4c37292b365c19e6d2feeb6a17c4049

SHA1
a7c201719a6c4e58f57baa2a88b110d72f3daefe

SHA256
444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83

SHA512
8436f1f96c2ea3487e1205d2f0dbf8db33fc622a9d863f39402802a8c16bb05897477ba58d57fcb7d7a6bb265c52a25331ac5505dd3ac2c6b3fc2823eb56f805

Download Submit
memory/864-1-0x0000000004320000-0x00000000043B6000-memory.dmp

Filesize
600KB

Download
memory/864-2-0x0000000005DB0000-0x0000000005ECB000-memory.dmp

Filesize
1.1MB

Download
memory/2916-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2916-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2916-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2916-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2916-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4012-19-0x0000000004140000-0x00000000041E1000-memory.dmp

Filesize
644KB

Download
memory/4192-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4192-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4192-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 864 wrote to memory of 2916	864	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
PID 864 wrote to memory of 2916	864	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
PID 864 wrote to memory of 2916	864	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
PID 864 wrote to memory of 2916	864	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
PID 864 wrote to memory of 2916	864	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
PID 864 wrote to memory of 2916	864	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
PID 864 wrote to memory of 2916	864	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
PID 864 wrote to memory of 2916	864	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
PID 864 wrote to memory of 2916	864	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
PID 864 wrote to memory of 2916	864	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
PID 2916 wrote to memory of 1188	2916	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	icacls.exe
PID 2916 wrote to memory of 1188	2916	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	icacls.exe
PID 2916 wrote to memory of 1188	2916	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	icacls.exe
PID 2916 wrote to memory of 4012	2916	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
PID 2916 wrote to memory of 4012	2916	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
PID 2916 wrote to memory of 4012	2916	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
PID 4012 wrote to memory of 4192	4012	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
PID 4012 wrote to memory of 4192	4012	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
PID 4012 wrote to memory of 4192	4012	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
PID 4012 wrote to memory of 4192	4012	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
PID 4012 wrote to memory of 4192	4012	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
PID 4012 wrote to memory of 4192	4012	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
PID 4012 wrote to memory of 4192	4012	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
PID 4012 wrote to memory of 4192	4012	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
PID 4012 wrote to memory of 4192	4012	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe
PID 4012 wrote to memory of 4192	4012	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe	444cf71032e7c7be2a79255af4fb38bab0333fb0a060ecc3fe91473d26ebce83.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads