djvu | 596be482747a9c9fe559196b0a389de92eeeea2b305777c2d1800f9c014c22ce

Analysis

max time kernel
39s
max time network
49s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
19/12/2023, 21:16

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General

Target

3edbc9c7553dad54925210b7f9ece36c.exe
Size

301KB
MD5

3edbc9c7553dad54925210b7f9ece36c
SHA1

57014d3163d27b21075c37d993c14a56cf7208da
SHA256

596be482747a9c9fe559196b0a389de92eeeea2b305777c2d1800f9c014c22ce
SHA512

2944c936c953478fdc496b90428296080f49f91de136b36c88ef95b330ad8300d560291d7d14b98e168b8f589482e6f4cb0ad08102c2f16721d0d54f7c1773b1
SSDEEP

6144:jTisyjd2Gdq45dCnn0jiXXg/RHnpVeVs4:/VGYGs45dCnnFXkVeu

Score

10^/10

djvu smokeloader pub1 backdoor discovery persistence ransomware trojan

Malware Config

Extracted

Family

smokeloader

Botnet

pub1

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
.loqw
offline_id
NrqpaQRhQqq5l2tBPp1QS34I3ME2IKsAlZ0A9pt1
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-MhbiRFXgXD 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: 0838ASdw

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral2/memory/4100-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4828-37-0x0000000004150000-0x000000000426B000-memory.dmp	family_djvu
behavioral2/memory/4100-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4100-41-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4100-42-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4100-52-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1360-61-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1360-62-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1360-64-0x0000000000400000-0x0000000000537000-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-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation	FF51.exe

Deletes itself 1 IoCs

pid	Process
3428	Process not Found

Executes dropped EXE 7 IoCs

pid	Process
1688	E81E.exe
3688	E81E.exe
4828	FF51.exe
4100	FF51.exe
4884	FF51.exe
3468	ABC.exe
1360	FF51.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4660	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-1-5-21-996941297-2279405024-2328152752-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\b838bee8-ca3a-4746-a576-61108fcec3eb\\FF51.exe\" --AutoStart"	FF51.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
83	api.2ip.ua
81	api.2ip.ua

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 5092 set thread context of 644	5092	3edbc9c7553dad54925210b7f9ece36c.exe	87
PID 1688 set thread context of 3688	1688	E81E.exe	96
PID 4828 set thread context of 4100	4828	FF51.exe	100
PID 4884 set thread context of 1360	4884	FF51.exe	105

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

System Information Discovery
T1082

Checks SCSI registry key(s) 3 TTPs 6 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	3edbc9c7553dad54925210b7f9ece36c.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	3edbc9c7553dad54925210b7f9ece36c.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	3edbc9c7553dad54925210b7f9ece36c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	E81E.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	E81E.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	E81E.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
644	3edbc9c7553dad54925210b7f9ece36c.exe
644	3edbc9c7553dad54925210b7f9ece36c.exe
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found
3428	Process not Found

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
644	3edbc9c7553dad54925210b7f9ece36c.exe
3688	E81E.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeShutdownPrivilege	3428	Process not Found
Token: SeCreatePagefilePrivilege	3428	Process not Found
Token: SeShutdownPrivilege	3428	Process not Found
Token: SeCreatePagefilePrivilege	3428	Process not Found
Token: SeShutdownPrivilege	3428	Process not Found
Token: SeCreatePagefilePrivilege	3428	Process not Found
Token: SeShutdownPrivilege	3428	Process not Found
Token: SeCreatePagefilePrivilege	3428	Process not Found

Suspicious use of WriteProcessMemory 51 IoCs

description	pid	Process	procid_target
PID 5092 wrote to memory of 644	5092	3edbc9c7553dad54925210b7f9ece36c.exe	87
PID 5092 wrote to memory of 644	5092	3edbc9c7553dad54925210b7f9ece36c.exe	87
PID 5092 wrote to memory of 644	5092	3edbc9c7553dad54925210b7f9ece36c.exe	87
PID 5092 wrote to memory of 644	5092	3edbc9c7553dad54925210b7f9ece36c.exe	87
PID 5092 wrote to memory of 644	5092	3edbc9c7553dad54925210b7f9ece36c.exe	87
PID 5092 wrote to memory of 644	5092	3edbc9c7553dad54925210b7f9ece36c.exe	87
PID 3428 wrote to memory of 1688	3428	Process not Found	92
PID 3428 wrote to memory of 1688	3428	Process not Found	92
PID 3428 wrote to memory of 1688	3428	Process not Found	92
PID 3428 wrote to memory of 2364	3428	Process not Found	93
PID 3428 wrote to memory of 2364	3428	Process not Found	93
PID 2364 wrote to memory of 3296	2364	cmd.exe	95
PID 2364 wrote to memory of 3296	2364	cmd.exe	95
PID 1688 wrote to memory of 3688	1688	E81E.exe	96
PID 1688 wrote to memory of 3688	1688	E81E.exe	96
PID 1688 wrote to memory of 3688	1688	E81E.exe	96
PID 1688 wrote to memory of 3688	1688	E81E.exe	96
PID 1688 wrote to memory of 3688	1688	E81E.exe	96
PID 1688 wrote to memory of 3688	1688	E81E.exe	96
PID 3428 wrote to memory of 4828	3428	Process not Found	99
PID 3428 wrote to memory of 4828	3428	Process not Found	99
PID 3428 wrote to memory of 4828	3428	Process not Found	99
PID 4828 wrote to memory of 4100	4828	FF51.exe	100
PID 4828 wrote to memory of 4100	4828	FF51.exe	100
PID 4828 wrote to memory of 4100	4828	FF51.exe	100
PID 4828 wrote to memory of 4100	4828	FF51.exe	100
PID 4828 wrote to memory of 4100	4828	FF51.exe	100
PID 4828 wrote to memory of 4100	4828	FF51.exe	100
PID 4828 wrote to memory of 4100	4828	FF51.exe	100
PID 4828 wrote to memory of 4100	4828	FF51.exe	100
PID 4828 wrote to memory of 4100	4828	FF51.exe	100
PID 4828 wrote to memory of 4100	4828	FF51.exe	100
PID 4100 wrote to memory of 4660	4100	FF51.exe	101
PID 4100 wrote to memory of 4660	4100	FF51.exe	101
PID 4100 wrote to memory of 4660	4100	FF51.exe	101
PID 4100 wrote to memory of 4884	4100	FF51.exe	102
PID 4100 wrote to memory of 4884	4100	FF51.exe	102
PID 4100 wrote to memory of 4884	4100	FF51.exe	102
PID 3428 wrote to memory of 3468	3428	Process not Found	104
PID 3428 wrote to memory of 3468	3428	Process not Found	104
PID 3428 wrote to memory of 3468	3428	Process not Found	104
PID 4884 wrote to memory of 1360	4884	FF51.exe	105
PID 4884 wrote to memory of 1360	4884	FF51.exe	105
PID 4884 wrote to memory of 1360	4884	FF51.exe	105
PID 4884 wrote to memory of 1360	4884	FF51.exe	105
PID 4884 wrote to memory of 1360	4884	FF51.exe	105
PID 4884 wrote to memory of 1360	4884	FF51.exe	105
PID 4884 wrote to memory of 1360	4884	FF51.exe	105
PID 4884 wrote to memory of 1360	4884	FF51.exe	105
PID 4884 wrote to memory of 1360	4884	FF51.exe	105
PID 4884 wrote to memory of 1360	4884	FF51.exe	105

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\3edbc9c7553dad54925210b7f9ece36c.exe
"C:\Users\Admin\AppData\Local\Temp\3edbc9c7553dad54925210b7f9ece36c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5092
- C:\Users\Admin\AppData\Local\Temp\3edbc9c7553dad54925210b7f9ece36c.exe
  "C:\Users\Admin\AppData\Local\Temp\3edbc9c7553dad54925210b7f9ece36c.exe"
  2⤵
  - Checks SCSI registry key(s)
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  PID:644

C:\Users\Admin\AppData\Local\Temp\E81E.exe
C:\Users\Admin\AppData\Local\Temp\E81E.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1688
- C:\Users\Admin\AppData\Local\Temp\E81E.exe
  C:\Users\Admin\AppData\Local\Temp\E81E.exe
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious behavior: MapViewOfSection
  PID:3688

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\E9A5.bat" "
1⤵
- Suspicious use of WriteProcessMemory
PID:2364
- C:\Windows\system32\reg.exe
  reg add "HKEY_CURRENT_USER\Software\clicker\key" /v primary /t REG_DWORD /d 1
  2⤵
  PID:3296

C:\Users\Admin\AppData\Local\Temp\FF51.exe
C:\Users\Admin\AppData\Local\Temp\FF51.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4828
- C:\Users\Admin\AppData\Local\Temp\FF51.exe
  C:\Users\Admin\AppData\Local\Temp\FF51.exe
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:4100
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\b838bee8-ca3a-4746-a576-61108fcec3eb" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4660
- - C:\Users\Admin\AppData\Local\Temp\FF51.exe
    "C:\Users\Admin\AppData\Local\Temp\FF51.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4884
  - - C:\Users\Admin\AppData\Local\Temp\FF51.exe
      "C:\Users\Admin\AppData\Local\Temp\FF51.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Executes dropped EXE
      PID:1360

C:\Users\Admin\AppData\Local\Temp\ABC.exe
C:\Users\Admin\AppData\Local\Temp\ABC.exe
1⤵
- Executes dropped EXE
PID:3468

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 356 -p 1360 -ip 1360
1⤵
PID:4644

C:\Users\Admin\AppData\Local\Temp\1452.exe
C:\Users\Admin\AppData\Local\Temp\1452.exe
1⤵
PID:2872

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\ABC.exe

Filesize
2.7MB

MD5
b354abdb8c17beeae07b9418535f4bdc

SHA1
cb4fb26e9c00426cf3d1c70f99e72fd36d6c22b9

SHA256
f688fb7b4cf19a4760138e7625915815f4acc23732456a3540f76f39aed90417

SHA512
21a37e78fff981ba88cab5e92b5c61216af93fc8a44bffdc33a3fcb16875d271790d18d6a0247367594965bae0ee0ee8e56994f02db0df5dbd5179a8dd0d613f

Download Submit
C:\Users\Admin\AppData\Local\Temp\E81E.exe

Filesize
301KB

MD5
3edbc9c7553dad54925210b7f9ece36c

SHA1
57014d3163d27b21075c37d993c14a56cf7208da

SHA256
596be482747a9c9fe559196b0a389de92eeeea2b305777c2d1800f9c014c22ce

SHA512
2944c936c953478fdc496b90428296080f49f91de136b36c88ef95b330ad8300d560291d7d14b98e168b8f589482e6f4cb0ad08102c2f16721d0d54f7c1773b1

Download Submit
C:\Users\Admin\AppData\Local\Temp\E9A5.bat

Filesize
77B

MD5
55cc761bf3429324e5a0095cab002113

SHA1
2cc1ef4542a4e92d4158ab3978425d517fafd16d

SHA256
d6cceb3c71b80403364bf142f2fa4624ee0be36a49bac25ed45a497cf1ce9c3a

SHA512
33f9f5cad22d291077787c7df510806e4ac31f453d288712595af6debe579fabed6cdf4662e46e6fa94de135b161e739f55cfae05c36c87af85ed6a6ad1c9155

Download Submit
C:\Users\Admin\AppData\Local\Temp\FF51.exe

Filesize
810KB

MD5
c108826f0555d4e9d6f1fcd7f0b872cd

SHA1
3f25f209b69a8b95c03292c165e97ca6ed38a102

SHA256
b590920e6bd30cbbc602a47a86db121a1d781c98943c8d2e968fa3ad7cfc7cd9

SHA512
e9c9944866e878955e69c9520812f3a6cef0f355081c425086be5ae81c9ead9b1847ab9088a30c86ccaea3c704f1e961b05279c9ce29f44d4d5d5ab25979f04f

Download Submit
memory/644-4-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/644-3-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/644-6-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/1360-61-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1360-64-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1360-62-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1688-23-0x00000000025F0000-0x00000000026F0000-memory.dmp

Filesize
1024KB

Download
memory/3428-5-0x00000000027D0000-0x00000000027E6000-memory.dmp

Filesize
88KB

Download
memory/3428-26-0x00000000070B0000-0x00000000070C6000-memory.dmp

Filesize
88KB

Download
memory/3688-25-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/3688-27-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/4100-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4100-40-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4100-41-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4100-42-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4100-52-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4828-37-0x0000000004150000-0x000000000426B000-memory.dmp

Filesize
1.1MB

Download
memory/4828-36-0x00000000026D0000-0x0000000002767000-memory.dmp

Filesize
604KB

Download
memory/4884-58-0x0000000003F10000-0x0000000003FAF000-memory.dmp

Filesize
636KB

Download
memory/5092-2-0x0000000003FC0000-0x0000000003FC9000-memory.dmp

Filesize
36KB

Download
memory/5092-1-0x00000000024E0000-0x00000000025E0000-memory.dmp

Filesize
1024KB

Download