djvu | 8f3920415bc1e2728e3d705fd33d1253b1df26297b1760e2433fe9db94081692

Analysis

max time kernel
142s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
16/04/2024, 15:14

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General

Target
f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe
Size 744KB
Sample240416-smnybaeh21
SHA256 8f3920415bc1e2728e3d705fd33d1253b1df26297b1760e2433fe9db94081692
MD5 f3c104803643ed3d8a244ef51d90595c
SHA1 23ab76f6332e7e84630e8b97646386734dc9e441
SHA512 ad2996df5a7d01e8808df5d2a0025b6bde720a7068ac89a63d7b648b8b5b3716571a28743277b09bbc884992864e0ca6602e3958268f79269526276a88423932
SSDEEP 12288:44oCvP5Z8jGnrxdLaP24G2sdX/bKiuuxRNhYALUg3w+jFRbTD6f38LPLSgzknmwB:7fFrxdBFdWPuzYyUg3wafD6yB
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://astdg.top/fhsgtsspen6/get.php

Attributes

extension
.nooa
offline_id
PLtnD1U6oAmgxgJ2nJik1mY9SwUQg07CiN0zSet1
payload_url
http://securebiz.org/dl/build2.exe

http://astdg.top/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-CnI3tI6Ktv 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: 0322gDrgo

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral2/memory/372-2-0x0000000004B80000-0x0000000004C9B000-memory.dmp	family_djvu
behavioral2/memory/3128-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3128-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3128-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3128-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3128-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2356-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2356-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2356-23-0x0000000000400000-0x0000000000537000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1900	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-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\ab73db55-b064-43ac-b39f-2d8f87789c58\\f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe\" --AutoStart"	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.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 372 set thread context of 3128	372	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	91
PID 4732 set thread context of 2356	4732	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	100

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
3864	2356	WerFault.exe	100

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3128	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe
3128	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 372 wrote to memory of 3128	372	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	91
PID 372 wrote to memory of 3128	372	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	91
PID 372 wrote to memory of 3128	372	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	91
PID 372 wrote to memory of 3128	372	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	91
PID 372 wrote to memory of 3128	372	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	91
PID 372 wrote to memory of 3128	372	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	91
PID 372 wrote to memory of 3128	372	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	91
PID 372 wrote to memory of 3128	372	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	91
PID 372 wrote to memory of 3128	372	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	91
PID 372 wrote to memory of 3128	372	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	91
PID 3128 wrote to memory of 1900	3128	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	92
PID 3128 wrote to memory of 1900	3128	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	92
PID 3128 wrote to memory of 1900	3128	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	92
PID 3128 wrote to memory of 4732	3128	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	95
PID 3128 wrote to memory of 4732	3128	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	95
PID 3128 wrote to memory of 4732	3128	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	95
PID 4732 wrote to memory of 2356	4732	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	100
PID 4732 wrote to memory of 2356	4732	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	100
PID 4732 wrote to memory of 2356	4732	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	100
PID 4732 wrote to memory of 2356	4732	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	100
PID 4732 wrote to memory of 2356	4732	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	100
PID 4732 wrote to memory of 2356	4732	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	100
PID 4732 wrote to memory of 2356	4732	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	100
PID 4732 wrote to memory of 2356	4732	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	100
PID 4732 wrote to memory of 2356	4732	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	100
PID 4732 wrote to memory of 2356	4732	f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe	100

C:\Users\Admin\AppData\Local\Temp\f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:372
- C:\Users\Admin\AppData\Local\Temp\f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3128
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\ab73db55-b064-43ac-b39f-2d8f87789c58" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1900
- - C:\Users\Admin\AppData\Local\Temp\f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4732
  - - C:\Users\Admin\AppData\Local\Temp\f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe
      "C:\Users\Admin\AppData\Local\Temp\f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:2356
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2356 -s 568
        5⤵
        Program crash
        
        PID:3864

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 2356 -ip 2356
1⤵
PID:3952

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=1424 --field-trial-handle=2180,i,12780723798465539942,12010519452607841069,262144 --variations-seed-version /prefetch:8
1⤵
PID:1188

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

File and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe

Path C:\Users\Admin\AppData\Local\ab73db55-b064-43ac-b39f-2d8f87789c58\f3c104803643ed3d8a244ef51d90595c_JaffaCakes118.exe
Size 744KB
SHA256 8f3920415bc1e2728e3d705fd33d1253b1df26297b1760e2433fe9db94081692
MD5 f3c104803643ed3d8a244ef51d90595c
SHA1 23ab76f6332e7e84630e8b97646386734dc9e441
SHA512 ad2996df5a7d01e8808df5d2a0025b6bde720a7068ac89a63d7b648b8b5b3716571a28743277b09bbc884992864e0ca6602e3958268f79269526276a88423932
SSDEEP 12288:44oCvP5Z8jGnrxdLaP24G2sdX/bKiuuxRNhYALUg3w+jFRbTD6f38LPLSgzknmwB:7fFrxdBFdWPuzYyUg3wafD6yB
MD5 SHA1 SHA512 SSDEEP

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memory/372-1-0x0000000004A40000-0x0000000004AD7000-memory.dmp

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memory/372-2-0x0000000004B80000-0x0000000004C9B000-memory.dmp

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memory/2356-20-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2356-21-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2356-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3128-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3128-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3128-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3128-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3128-15-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4732-18-0x0000000004970000-0x0000000004A11000-memory.dmp

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