djvu | 23b0b1c7d69d4fd12bdbea87bee294d99af2378dfa79fdaaf3d6e6e4f2d8628a

General

Target

23b0b1c7d69d4fd12bdbea87bee294d99af2378dfa79fdaaf3d6e6e4f2d8628a.exe
Size

277KB
MD5

0a4050b41baf35977e32749d092364dc
SHA1

e86798879b46d78b80442390e3bf16576597bbd0
SHA256

23b0b1c7d69d4fd12bdbea87bee294d99af2378dfa79fdaaf3d6e6e4f2d8628a
SHA512

baf663684dcdce2e39c18ebe22bbfb6c649200ab2a72269b5fba6d263c2eba5bafa12455d5bc569810f538e2f8b9bd05185536509897255da49dfefcdea8c4a9
SSDEEP

3072:MOGWS6M7qGfIDp+pwZXhmnuJqkQt5LxxCNGZyAEr2vnV1cywTBlMTKa:MOYeKEpdrhQhfkXqvnHUBCT

Score

10^/10

djvu smokeloader pub1 backdoor discovery persistence ransomware trojan

Malware Config

Extracted

Family

smokeloader

Botnet

pub1

Extracted

Family

smokeloader

Version

2022

C2

http://trad-einmyus.com/index.php

http://tradein-myus.com/index.php

http://trade-inmyus.com/index.php

rc4.i32

Extracted

Family

djvu

C2

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

Attributes

extension
.vook
offline_id
1eSPzWRaNslCgtjBZfL5pzvovoiaVI4IZSnvAwt1
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

Processes:

resource	yara_rule
behavioral2/memory/1152-21-0x0000000004B90000-0x0000000004CAB000-memory.dmp	family_djvu
behavioral2/memory/4108-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4108-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4108-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4108-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4108-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4924-44-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4924-45-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4924-47-0x0000000000400000-0x0000000000537000-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
Deletes itself 1 IoCs

Processes:

pid process

3356
Executes dropped EXE 5 IoCs

Processes:

BC2D.exeBC2D.exeBC2D.exeBC2D.exeF138.exe

pid process

1152 BC2D.exe
4108 BC2D.exe
3240 BC2D.exe
4924 BC2D.exe
3756 F138.exe
Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

1460 icacls.exe

pid	process
3356

pid	process
1152	BC2D.exe
4108	BC2D.exe
3240	BC2D.exe
4924	BC2D.exe
3756	F138.exe

pid	process
1460	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

BC2D.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3594324687-1993884830-4019639329-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f3ecdc10-b64f-4389-87e6-b5ba77853c88\\BC2D.exe\" --AutoStart"	BC2D.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

15 api.2ip.ua
1 api.2ip.ua
Suspicious use of SetThreadContext 2 IoCs

Processes:

BC2D.exeBC2D.exe

description pid process target process

PID 1152 set thread context of 4108 1152 BC2D.exe BC2D.exe
PID 3240 set thread context of 4924 3240 BC2D.exe BC2D.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

4812 4924 WerFault.exe BC2D.exe

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

description	pid	process	target process
PID 1152 set thread context of 4108	1152	BC2D.exe	BC2D.exe
PID 3240 set thread context of 4924	3240	BC2D.exe	BC2D.exe

pid	pid_target	process	target process
4812	4924	WerFault.exe	BC2D.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

Processes:

23b0b1c7d69d4fd12bdbea87bee294d99af2378dfa79fdaaf3d6e6e4f2d8628a.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	23b0b1c7d69d4fd12bdbea87bee294d99af2378dfa79fdaaf3d6e6e4f2d8628a.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	23b0b1c7d69d4fd12bdbea87bee294d99af2378dfa79fdaaf3d6e6e4f2d8628a.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	23b0b1c7d69d4fd12bdbea87bee294d99af2378dfa79fdaaf3d6e6e4f2d8628a.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

23b0b1c7d69d4fd12bdbea87bee294d99af2378dfa79fdaaf3d6e6e4f2d8628a.exe

pid	process
4448	23b0b1c7d69d4fd12bdbea87bee294d99af2378dfa79fdaaf3d6e6e4f2d8628a.exe
4448	23b0b1c7d69d4fd12bdbea87bee294d99af2378dfa79fdaaf3d6e6e4f2d8628a.exe
3356
3356
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3356
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3356
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3356
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3356
3356
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3356
3356
3356
3356
3356
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3356
3356
3356
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3356
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3356
3356
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3356
3356

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

23b0b1c7d69d4fd12bdbea87bee294d99af2378dfa79fdaaf3d6e6e4f2d8628a.exe

pid process

4448 23b0b1c7d69d4fd12bdbea87bee294d99af2378dfa79fdaaf3d6e6e4f2d8628a.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

Processes:

description	pid	process
Token: SeShutdownPrivilege	3356
Token: SeCreatePagefilePrivilege	3356
Token: SeShutdownPrivilege	3356
Token: SeCreatePagefilePrivilege	3356
Token: SeShutdownPrivilege	3356
Token: SeCreatePagefilePrivilege	3356
Token: SeShutdownPrivilege	3356
Token: SeCreatePagefilePrivilege	3356

Suspicious use of WriteProcessMemory 36 IoCs

Processes:

cmd.exeBC2D.exeBC2D.exeBC2D.exe

description	pid	process	target process
PID 3356 wrote to memory of 3984	3356		cmd.exe
PID 3356 wrote to memory of 3984	3356		cmd.exe
PID 3984 wrote to memory of 3348	3984	cmd.exe	reg.exe
PID 3984 wrote to memory of 3348	3984	cmd.exe	reg.exe
PID 3356 wrote to memory of 1152	3356		BC2D.exe
PID 3356 wrote to memory of 1152	3356		BC2D.exe
PID 3356 wrote to memory of 1152	3356		BC2D.exe
PID 1152 wrote to memory of 4108	1152	BC2D.exe	BC2D.exe
PID 1152 wrote to memory of 4108	1152	BC2D.exe	BC2D.exe
PID 1152 wrote to memory of 4108	1152	BC2D.exe	BC2D.exe
PID 1152 wrote to memory of 4108	1152	BC2D.exe	BC2D.exe
PID 1152 wrote to memory of 4108	1152	BC2D.exe	BC2D.exe
PID 1152 wrote to memory of 4108	1152	BC2D.exe	BC2D.exe
PID 1152 wrote to memory of 4108	1152	BC2D.exe	BC2D.exe
PID 1152 wrote to memory of 4108	1152	BC2D.exe	BC2D.exe
PID 1152 wrote to memory of 4108	1152	BC2D.exe	BC2D.exe
PID 1152 wrote to memory of 4108	1152	BC2D.exe	BC2D.exe
PID 4108 wrote to memory of 1460	4108	BC2D.exe	icacls.exe
PID 4108 wrote to memory of 1460	4108	BC2D.exe	icacls.exe
PID 4108 wrote to memory of 1460	4108	BC2D.exe	icacls.exe
PID 4108 wrote to memory of 3240	4108	BC2D.exe	BC2D.exe
PID 4108 wrote to memory of 3240	4108	BC2D.exe	BC2D.exe
PID 4108 wrote to memory of 3240	4108	BC2D.exe	BC2D.exe
PID 3240 wrote to memory of 4924	3240	BC2D.exe	BC2D.exe
PID 3240 wrote to memory of 4924	3240	BC2D.exe	BC2D.exe
PID 3240 wrote to memory of 4924	3240	BC2D.exe	BC2D.exe
PID 3240 wrote to memory of 4924	3240	BC2D.exe	BC2D.exe
PID 3240 wrote to memory of 4924	3240	BC2D.exe	BC2D.exe
PID 3240 wrote to memory of 4924	3240	BC2D.exe	BC2D.exe
PID 3240 wrote to memory of 4924	3240	BC2D.exe	BC2D.exe
PID 3240 wrote to memory of 4924	3240	BC2D.exe	BC2D.exe
PID 3240 wrote to memory of 4924	3240	BC2D.exe	BC2D.exe
PID 3240 wrote to memory of 4924	3240	BC2D.exe	BC2D.exe
PID 3356 wrote to memory of 3756	3356		F138.exe
PID 3356 wrote to memory of 3756	3356		F138.exe
PID 3356 wrote to memory of 3756	3356		F138.exe

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\23b0b1c7d69d4fd12bdbea87bee294d99af2378dfa79fdaaf3d6e6e4f2d8628a.exe
"C:\Users\Admin\AppData\Local\Temp\23b0b1c7d69d4fd12bdbea87bee294d99af2378dfa79fdaaf3d6e6e4f2d8628a.exe"
1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:4448

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\89A2.bat" "
1⤵
- Suspicious use of WriteProcessMemory
PID:3984

C:\Windows\system32\reg.exe
reg add "HKEY_CURRENT_USER\Software\clicker\key" /v primary /t REG_DWORD /d 1
2⤵
PID:3348

C:\Users\Admin\AppData\Local\Temp\BC2D.exe
C:\Users\Admin\AppData\Local\Temp\BC2D.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1152

C:\Users\Admin\AppData\Local\Temp\BC2D.exe
C:\Users\Admin\AppData\Local\Temp\BC2D.exe
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4108

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\f3ecdc10-b64f-4389-87e6-b5ba77853c88" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:1460

C:\Users\Admin\AppData\Local\Temp\BC2D.exe
"C:\Users\Admin\AppData\Local\Temp\BC2D.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3240

C:\Users\Admin\AppData\Local\Temp\BC2D.exe
"C:\Users\Admin\AppData\Local\Temp\BC2D.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Executes dropped EXE
PID:4924

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4924 -s 600
5⤵
- Program crash
PID:4812

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4924 -ip 4924
1⤵
PID:864

C:\Users\Admin\AppData\Local\Temp\F138.exe
C:\Users\Admin\AppData\Local\Temp\F138.exe
1⤵
- Executes dropped EXE
PID:3756

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\F3F8.bat" "
1⤵
PID:124

C:\Windows\system32\reg.exe
reg add "HKEY_CURRENT_USER\Software\clicker\key" /v primary /t REG_DWORD /d 1
2⤵
PID:1776

Network

MITRE ATT&CK Matrix ATT&CK v13

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

1

T1222

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

2

T1082

Query Registry

2

T1012

Peripheral Device Discovery

1

T1120

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\89A2.bat
Filesize
77B

MD5
55cc761bf3429324e5a0095cab002113

SHA1
2cc1ef4542a4e92d4158ab3978425d517fafd16d

SHA256
d6cceb3c71b80403364bf142f2fa4624ee0be36a49bac25ed45a497cf1ce9c3a

SHA512
33f9f5cad22d291077787c7df510806e4ac31f453d288712595af6debe579fabed6cdf4662e46e6fa94de135b161e739f55cfae05c36c87af85ed6a6ad1c9155

Download Submit
C:\Users\Admin\AppData\Local\Temp\BC2D.exe
Filesize
775KB

MD5
0bce94914b6f342ca9d88f651a8f0288

SHA1
05c05ed36c5b04aa64eaf420d9e418f85dd8fd8a

SHA256
7ced079f6b9a845d2d0cc88a14bc09cab9221b9d56fa99932271942fd42c8ce0

SHA512
77c9c96a61027b60b398f6a57db6423624624673327b5da3d19c5d0dd956ee2b32befcf65e8dc5d4aa5086e52c3997c18e9cda143e6cfacb3b7f43fdc871cd10

Download Submit
C:\Users\Admin\AppData\Local\Temp\F138.exe
Filesize
6.5MB

MD5
9e52aa572f0afc888c098db4c0f687ff

SHA1
ef7c2bb222e69ad0e10c8686eb03dcbee7933c2b

SHA256
4a40f9d491f09521f4b0c6076a0eb488f6d8e1cf4b67aa6569c2ccce13556443

SHA512
d0991e682ae8c954721e905753b56c01f91b85313beb9996331793c3efa8acc13d574ef5ba44853ecc3e05822931ed655bad1924fa11b774a43e015f42185f62

Download Submit
memory/1152-20-0x0000000004990000-0x0000000004A2C000-memory.dmp

Filesize
624KB

Download
memory/1152-21-0x0000000004B90000-0x0000000004CAB000-memory.dmp

Filesize
1.1MB

Download
memory/3240-41-0x00000000049B0000-0x0000000004A43000-memory.dmp

Filesize
588KB

Download
memory/3356-4-0x0000000000A80000-0x0000000000A96000-memory.dmp

Filesize
88KB

Download
memory/3756-67-0x0000000000E30000-0x0000000000E31000-memory.dmp

Filesize
4KB

Download
memory/3756-69-0x0000000001C40000-0x0000000001C41000-memory.dmp

Filesize
4KB

Download
memory/3756-72-0x0000000001C50000-0x0000000001C90000-memory.dmp

Filesize
256KB

Download
memory/3756-76-0x0000000001C50000-0x0000000001C90000-memory.dmp

Filesize
256KB

Download
memory/3756-73-0x0000000001C50000-0x0000000001C90000-memory.dmp

Filesize
256KB

Download
memory/3756-75-0x0000000001C50000-0x0000000001C90000-memory.dmp

Filesize
256KB

Download
memory/3756-74-0x0000000001C50000-0x0000000001C90000-memory.dmp

Filesize
256KB

Download
memory/3756-71-0x0000000001C50000-0x0000000001C90000-memory.dmp

Filesize
256KB

Download
memory/3756-68-0x0000000001C30000-0x0000000001C31000-memory.dmp

Filesize
4KB

Download
memory/3756-66-0x0000000000E20000-0x0000000000E21000-memory.dmp

Filesize
4KB

Download
memory/3756-65-0x0000000000E40000-0x0000000001B25000-memory.dmp

Filesize
12.9MB

Download
memory/3756-64-0x0000000000DF0000-0x0000000000DF1000-memory.dmp

Filesize
4KB

Download
memory/3756-54-0x0000000000E40000-0x0000000001B25000-memory.dmp

Filesize
12.9MB

Download
memory/3756-63-0x0000000000DE0000-0x0000000000DE1000-memory.dmp

Filesize
4KB

Download
memory/4108-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4108-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4108-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4108-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4108-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4448-2-0x0000000002E50000-0x0000000002E5B000-memory.dmp

Filesize
44KB

Download
memory/4448-1-0x0000000003020000-0x0000000003120000-memory.dmp

Filesize
1024KB

Download
memory/4448-5-0x0000000000400000-0x0000000002D44000-memory.dmp

Filesize
41.3MB

Download
memory/4448-3-0x0000000000400000-0x0000000002D44000-memory.dmp

Filesize
41.3MB

Download
memory/4924-47-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4924-45-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4924-44-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads