djvu | 552cbe78e8078850c89a8e4deb2bce9c503af2a7c340a299c76ff77e0d150e28

Analysis

max time kernel
39s
max time network
63s
platform
windows10-2004_x64
resource
win10v2004-20231130-en
resource tags

arch:x64arch:x86image:win10v2004-20231130-enlocale:en-usos:windows10-2004-x64system
submitted
14/12/2023, 16:37

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General

Target

552cbe78e8078850c89a8e4deb2bce9c503af2a7c340a299c76ff77e0d150e28.exe
Size

257KB
MD5

3b4a071bf4a6f6dc379dfd6420a37018
SHA1

947dcc9ef11aa072cea7a9adacde38b2e4955c3f
SHA256

552cbe78e8078850c89a8e4deb2bce9c503af2a7c340a299c76ff77e0d150e28
SHA512

97afc047d22466f80550c138482bffdd66bef25fa19d948149b3bdbfe9043b6764124d107a763403e78960741dbe83c76597f2c62ace972594ea27df8ea8fd86
SSDEEP

3072:5wBaC7pYLdt9geueoqby6boK56qF1KZTFX:5wBaC7a9g5eoqb/jPcT

Score

10^/10

djvu smokeloader up3 backdoor discovery persistence ransomware trojan

Malware Config

Extracted

Family

smokeloader

Botnet

up3

Extracted

Family

smokeloader

Version

2020

http://host-file-host6.com/

http://host-host-file8.com/

rc4.i32

Extracted

Family

djvu

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

Attributes

extension
.ljuy
offline_id
B5moRKh7Z0xwbuNave594QPrrx2R2HOTp49pUFt1
payload_url
http://brusuax.com/dl/build2.exe

http://zexeq.com/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-mFyI2phKff 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: 0836ASdw

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral1/memory/384-27-0x00000000025C0000-0x00000000026DB000-memory.dmp	family_djvu
behavioral1/memory/4072-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4072-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4072-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4072-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4072-42-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1552-48-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1552-51-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1552-49-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
SmokeLoader
Modular backdoor trojan in use since 2014.
trojan backdoor smokeloader
Downloads MZ/PE file

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-1-5-21-3936660601-1848837011-2142350499-1000\Control Panel\International\Geo\Nation	C49A.exe

Deletes itself 1 IoCs

pid	Process
3344	Process not Found

Executes dropped EXE 5 IoCs

pid	Process
384	C49A.exe
4072	C49A.exe
5052	C49A.exe
1552	C49A.exe
1148	D890.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3856	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-1-5-21-3936660601-1848837011-2142350499-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\6f080bd4-4317-4729-8a46-01213133ad27\\C49A.exe\" --AutoStart"	C49A.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
217	api.2ip.ua
219	api.2ip.ua

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4460 set thread context of 2956	4460	552cbe78e8078850c89a8e4deb2bce9c503af2a7c340a299c76ff77e0d150e28.exe	89
PID 384 set thread context of 4072	384	C49A.exe	115
PID 5052 set thread context of 1552	5052	C49A.exe	121

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

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
1420	2956	WerFault.exe	89
2780	1552	WerFault.exe

Checks SCSI registry key(s) 3 TTPs 3 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	552cbe78e8078850c89a8e4deb2bce9c503af2a7c340a299c76ff77e0d150e28.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	552cbe78e8078850c89a8e4deb2bce9c503af2a7c340a299c76ff77e0d150e28.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	552cbe78e8078850c89a8e4deb2bce9c503af2a7c340a299c76ff77e0d150e28.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2956	552cbe78e8078850c89a8e4deb2bce9c503af2a7c340a299c76ff77e0d150e28.exe
2956	552cbe78e8078850c89a8e4deb2bce9c503af2a7c340a299c76ff77e0d150e28.exe
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
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3344	Process not Found
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3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found
3344	Process not Found

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2956	552cbe78e8078850c89a8e4deb2bce9c503af2a7c340a299c76ff77e0d150e28.exe

Suspicious use of AdjustPrivilegeToken 10 IoCs

description	pid	Process
Token: SeShutdownPrivilege	3344	Process not Found
Token: SeCreatePagefilePrivilege	3344	Process not Found
Token: SeShutdownPrivilege	3344	Process not Found
Token: SeCreatePagefilePrivilege	3344	Process not Found
Token: SeShutdownPrivilege	3344	Process not Found
Token: SeCreatePagefilePrivilege	3344	Process not Found
Token: SeShutdownPrivilege	3344	Process not Found
Token: SeCreatePagefilePrivilege	3344	Process not Found
Token: SeShutdownPrivilege	3344	Process not Found
Token: SeCreatePagefilePrivilege	3344	Process not Found

Suspicious use of WriteProcessMemory 45 IoCs

description	pid	Process	procid_target
PID 4460 wrote to memory of 2956	4460	552cbe78e8078850c89a8e4deb2bce9c503af2a7c340a299c76ff77e0d150e28.exe	89
PID 4460 wrote to memory of 2956	4460	552cbe78e8078850c89a8e4deb2bce9c503af2a7c340a299c76ff77e0d150e28.exe	89
PID 4460 wrote to memory of 2956	4460	552cbe78e8078850c89a8e4deb2bce9c503af2a7c340a299c76ff77e0d150e28.exe	89
PID 4460 wrote to memory of 2956	4460	552cbe78e8078850c89a8e4deb2bce9c503af2a7c340a299c76ff77e0d150e28.exe	89
PID 4460 wrote to memory of 2956	4460	552cbe78e8078850c89a8e4deb2bce9c503af2a7c340a299c76ff77e0d150e28.exe	89
PID 4460 wrote to memory of 2956	4460	552cbe78e8078850c89a8e4deb2bce9c503af2a7c340a299c76ff77e0d150e28.exe	89
PID 3344 wrote to memory of 1420	3344	Process not Found	106
PID 3344 wrote to memory of 1420	3344	Process not Found	106
PID 1420 wrote to memory of 2736	1420	cmd.exe	108
PID 1420 wrote to memory of 2736	1420	cmd.exe	108
PID 3344 wrote to memory of 3244	3344	Process not Found	109
PID 3344 wrote to memory of 3244	3344	Process not Found	109
PID 3244 wrote to memory of 3656	3244	cmd.exe	111
PID 3244 wrote to memory of 3656	3244	cmd.exe	111
PID 3344 wrote to memory of 384	3344	Process not Found	114
PID 3344 wrote to memory of 384	3344	Process not Found	114
PID 3344 wrote to memory of 384	3344	Process not Found	114
PID 384 wrote to memory of 4072	384	C49A.exe	115
PID 384 wrote to memory of 4072	384	C49A.exe	115
PID 384 wrote to memory of 4072	384	C49A.exe	115
PID 384 wrote to memory of 4072	384	C49A.exe	115
PID 384 wrote to memory of 4072	384	C49A.exe	115
PID 384 wrote to memory of 4072	384	C49A.exe	115
PID 384 wrote to memory of 4072	384	C49A.exe	115
PID 384 wrote to memory of 4072	384	C49A.exe	115
PID 384 wrote to memory of 4072	384	C49A.exe	115
PID 384 wrote to memory of 4072	384	C49A.exe	115
PID 4072 wrote to memory of 3856	4072	C49A.exe	116
PID 4072 wrote to memory of 3856	4072	C49A.exe	116
PID 4072 wrote to memory of 3856	4072	C49A.exe	116
PID 4072 wrote to memory of 5052	4072	C49A.exe	118
PID 4072 wrote to memory of 5052	4072	C49A.exe	118
PID 4072 wrote to memory of 5052	4072	C49A.exe	118
PID 5052 wrote to memory of 1552	5052	C49A.exe	121
PID 5052 wrote to memory of 1552	5052	C49A.exe	121
PID 5052 wrote to memory of 1552	5052	C49A.exe	121
PID 5052 wrote to memory of 1552	5052	C49A.exe	121
PID 5052 wrote to memory of 1552	5052	C49A.exe	121
PID 5052 wrote to memory of 1552	5052	C49A.exe	121
PID 5052 wrote to memory of 1552	5052	C49A.exe	121
PID 5052 wrote to memory of 1552	5052	C49A.exe	121
PID 5052 wrote to memory of 1552	5052	C49A.exe	121
PID 5052 wrote to memory of 1552	5052	C49A.exe	121
PID 3344 wrote to memory of 1148	3344	Process not Found	122
PID 3344 wrote to memory of 1148	3344	Process not Found	122

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\552cbe78e8078850c89a8e4deb2bce9c503af2a7c340a299c76ff77e0d150e28.exe
"C:\Users\Admin\AppData\Local\Temp\552cbe78e8078850c89a8e4deb2bce9c503af2a7c340a299c76ff77e0d150e28.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4460
- C:\Users\Admin\AppData\Local\Temp\552cbe78e8078850c89a8e4deb2bce9c503af2a7c340a299c76ff77e0d150e28.exe
  "C:\Users\Admin\AppData\Local\Temp\552cbe78e8078850c89a8e4deb2bce9c503af2a7c340a299c76ff77e0d150e28.exe"
  2⤵
  - Checks SCSI registry key(s)
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  PID:2956
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2956 -s 332
    3⤵
    - Program crash
    PID:1420

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 2956 -ip 2956
1⤵
PID:2708

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\9347.bat" "
1⤵
- Suspicious use of WriteProcessMemory
PID:1420
- C:\Windows\system32\reg.exe
  reg add "HKEY_CURRENT_USER\Software\clicker\key" /v primary /t REG_DWORD /d 1
  2⤵
  PID:2736

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\9607.bat" "
1⤵
- Suspicious use of WriteProcessMemory
PID:3244
- C:\Windows\system32\reg.exe
  reg add "HKEY_CURRENT_USER\Software\clicker\key" /v primary /t REG_DWORD /d 1
  2⤵
  PID:3656

C:\Users\Admin\AppData\Local\Temp\C49A.exe
C:\Users\Admin\AppData\Local\Temp\C49A.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:384
- C:\Users\Admin\AppData\Local\Temp\C49A.exe
  C:\Users\Admin\AppData\Local\Temp\C49A.exe
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:4072
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\6f080bd4-4317-4729-8a46-01213133ad27" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3856
- - C:\Users\Admin\AppData\Local\Temp\C49A.exe
    "C:\Users\Admin\AppData\Local\Temp\C49A.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:5052
  - - C:\Users\Admin\AppData\Local\Temp\C49A.exe
      "C:\Users\Admin\AppData\Local\Temp\C49A.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Executes dropped EXE
      PID:1552

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 1552 -ip 1552
1⤵
PID:1280

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1552 -s 568
1⤵
- Program crash
PID:2780

C:\Users\Admin\AppData\Local\Temp\D890.exe
C:\Users\Admin\AppData\Local\Temp\D890.exe
1⤵
- Executes dropped EXE
PID:1148

C:\Users\Admin\AppData\Local\Temp\DC1C.exe
C:\Users\Admin\AppData\Local\Temp\DC1C.exe
1⤵
PID:4932

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

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\9347.bat

Filesize
77B

MD5
55cc761bf3429324e5a0095cab002113

SHA1
2cc1ef4542a4e92d4158ab3978425d517fafd16d

SHA256
d6cceb3c71b80403364bf142f2fa4624ee0be36a49bac25ed45a497cf1ce9c3a

SHA512
33f9f5cad22d291077787c7df510806e4ac31f453d288712595af6debe579fabed6cdf4662e46e6fa94de135b161e739f55cfae05c36c87af85ed6a6ad1c9155

Download Submit
C:\Users\Admin\AppData\Local\Temp\C49A.exe

Filesize
755KB

MD5
c30809212ca8cd14fd119555575d818e

SHA1
759de667c7bab5a9f981f9a421aac5c67472e05b

SHA256
34745f4ad1e13c378174c22890558cf93a2d10a0dffa3d5c2814184009b7c5b4

SHA512
2080d402a03cd1292f248a022555da4dbcd8697681ae2dd9457c4328d39f9691ee9565e45ee9247992ceac02e9503ea54087932c1f8ae6d50a5c988dededa644

Download Submit
C:\Users\Admin\AppData\Local\Temp\C49A.exe

Filesize
678KB

MD5
c31fa07cb5caed10c418720500bedc57

SHA1
86e9c421de49eb1deaf92fde938a29f831aa86e4

SHA256
309c2b36c7772aff2ef1f0e11cfb8e83592ccfc3a5317cd87d750a4edd25c47f

SHA512
d919cb045de75c0d1d52986e38d5010c903542aa4a97bb49713126b359629970572e5dd8ca392e16ea1aba3b00fb0fbb71c2d2872f4a51f9b81bcef95a95b48e

Download Submit
C:\Users\Admin\AppData\Local\Temp\D890.exe

Filesize
1.4MB

MD5
8866dbe499087e8f36e22e1eb91e09ef

SHA1
c6739275abdcc272199d256a4ab01a705997ae9a

SHA256
a7ca43592a0e8effd5ce13b2c93b38acef8808f31fbd5d014dda2ff5d7906cd7

SHA512
0dee701ba93d5be87df7305b88b4319d6d456415bac3b2f49d73ff688b2b3946cefe49a3a0bae3a32de9bec8152a80762d5f19c1aa39b88c157fa6f8a69778da

Download Submit
memory/384-27-0x00000000025C0000-0x00000000026DB000-memory.dmp

Filesize
1.1MB

Download
memory/384-26-0x0000000000AF0000-0x0000000000B8B000-memory.dmp

Filesize
620KB

Download
memory/1148-61-0x000001BC7EDE0000-0x000001BC7EDF0000-memory.dmp

Filesize
64KB

Download
memory/1148-59-0x000001BC7F9F0000-0x000001BC7FB1E000-memory.dmp

Filesize
1.2MB

Download
memory/1148-60-0x00007FF8184F0000-0x00007FF818FB1000-memory.dmp

Filesize
10.8MB

Download
memory/1148-58-0x000001BC7E8A0000-0x000001BC7EA14000-memory.dmp

Filesize
1.5MB

Download
memory/1552-49-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1552-51-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1552-48-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2956-4-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2956-8-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2956-3-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/3344-5-0x00000000034C0000-0x00000000034D6000-memory.dmp

Filesize
88KB

Download
memory/4072-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4072-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4072-42-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4072-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4072-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4460-1-0x0000000000A40000-0x0000000000B40000-memory.dmp

Filesize
1024KB

Download
memory/4460-2-0x00000000009C0000-0x00000000009C9000-memory.dmp

Filesize
36KB

Download
memory/5052-45-0x0000000002430000-0x00000000024D2000-memory.dmp

Filesize
648KB

Download