smokeloader | 7b99c632ab84f20275e3e843fea6c977e4b067bbb9793a8ec1fd70dfcd7c0655

General

Target

7b99c632ab84f20275e3e843fea6c977e4b067bbb9793a8ec1fd70dfcd7c0655.exe
Size

179KB
MD5

9fd9c907502c996750546de517da033f
SHA1

ed4a00b0a408d69434c6b4a06571d43a8bb48fe6
SHA256

7b99c632ab84f20275e3e843fea6c977e4b067bbb9793a8ec1fd70dfcd7c0655
SHA512

285456a65835536e842ab9f79ca0008ac35eb79dfc47abaab78d847403f9a2edfb6bdd1ad322be529979f2140b4c8100b2f585ebfbbf79fc561a170aac81d360
SSDEEP

3072:DZYKT/Hp36WRurj0XDftvjlq50kCzI0+4M:qwvp36frj0Xb7kCzIdX

Score

10^/10

smokeloader pub1 backdoor persistence 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

Signatures

SmokeLoader
Modular backdoor trojan in use since 2014.
trojan backdoor smokeloader

Modifies Installed Components in the registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

explorer.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Active Setup\Installed Components	explorer.exe

Deletes itself 1 IoCs

Processes:

pid process

1196
Executes dropped EXE 1 IoCs

Processes:

tchwihc

pid process

1636 tchwihc

pid	process
1196

pid	process
1636	tchwihc

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

Processes:

7b99c632ab84f20275e3e843fea6c977e4b067bbb9793a8ec1fd70dfcd7c0655.exetchwihc

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	7b99c632ab84f20275e3e843fea6c977e4b067bbb9793a8ec1fd70dfcd7c0655.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	7b99c632ab84f20275e3e843fea6c977e4b067bbb9793a8ec1fd70dfcd7c0655.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	7b99c632ab84f20275e3e843fea6c977e4b067bbb9793a8ec1fd70dfcd7c0655.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	tchwihc
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	tchwihc
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	tchwihc

Modifies registry class 5 IoCs

Processes:

explorer.exe

description	ioc	process
Set value (data)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_Classes\Local Settings	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	explorer.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

7b99c632ab84f20275e3e843fea6c977e4b067bbb9793a8ec1fd70dfcd7c0655.exe

pid	process
2176	7b99c632ab84f20275e3e843fea6c977e4b067bbb9793a8ec1fd70dfcd7c0655.exe
2176	7b99c632ab84f20275e3e843fea6c977e4b067bbb9793a8ec1fd70dfcd7c0655.exe
1196
1196
1196
1196
1196
1196
1196
1196
1196
1196
1196
1196
1196
1196
1196
1196
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1196
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1196
1196

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

explorer.exe

pid process

2752 explorer.exe
Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

7b99c632ab84f20275e3e843fea6c977e4b067bbb9793a8ec1fd70dfcd7c0655.exetchwihc

pid process

2176 7b99c632ab84f20275e3e843fea6c977e4b067bbb9793a8ec1fd70dfcd7c0655.exe
1636 tchwihc

Suspicious use of AdjustPrivilegeToken 12 IoCs

Processes:

explorer.exe

description	pid	process
Token: SeShutdownPrivilege	2752	explorer.exe
Token: SeShutdownPrivilege	2752	explorer.exe
Token: SeShutdownPrivilege	2752	explorer.exe
Token: SeShutdownPrivilege	2752	explorer.exe
Token: SeShutdownPrivilege	2752	explorer.exe
Token: SeShutdownPrivilege	2752	explorer.exe
Token: SeShutdownPrivilege	2752	explorer.exe
Token: SeShutdownPrivilege	2752	explorer.exe
Token: SeShutdownPrivilege	2752	explorer.exe
Token: SeShutdownPrivilege	2752	explorer.exe
Token: SeShutdownPrivilege	2752	explorer.exe
Token: SeShutdownPrivilege	2752	explorer.exe

Suspicious use of FindShellTrayWindow 28 IoCs

Processes:

explorer.exe

pid	process
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe

Suspicious use of SendNotifyMessage 18 IoCs

Processes:

explorer.exe

pid	process
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe
2752	explorer.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

cmd.execmd.exetaskeng.exe

description	pid	process	target process
PID 1196 wrote to memory of 2656	1196		cmd.exe
PID 1196 wrote to memory of 2656	1196		cmd.exe
PID 1196 wrote to memory of 2656	1196		cmd.exe
PID 2656 wrote to memory of 2588	2656	cmd.exe	reg.exe
PID 2656 wrote to memory of 2588	2656	cmd.exe	reg.exe
PID 2656 wrote to memory of 2588	2656	cmd.exe	reg.exe
PID 1196 wrote to memory of 2748	1196		cmd.exe
PID 1196 wrote to memory of 2748	1196		cmd.exe
PID 1196 wrote to memory of 2748	1196		cmd.exe
PID 2748 wrote to memory of 2456	2748	cmd.exe	reg.exe
PID 2748 wrote to memory of 2456	2748	cmd.exe	reg.exe
PID 2748 wrote to memory of 2456	2748	cmd.exe	reg.exe
PID 2264 wrote to memory of 1636	2264	taskeng.exe	tchwihc
PID 2264 wrote to memory of 1636	2264	taskeng.exe	tchwihc
PID 2264 wrote to memory of 1636	2264	taskeng.exe	tchwihc
PID 2264 wrote to memory of 1636	2264	taskeng.exe	tchwihc

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\7b99c632ab84f20275e3e843fea6c977e4b067bbb9793a8ec1fd70dfcd7c0655.exe
"C:\Users\Admin\AppData\Local\Temp\7b99c632ab84f20275e3e843fea6c977e4b067bbb9793a8ec1fd70dfcd7c0655.exe"
1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:2176

C:\Windows\system32\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\61CF.bat" "
1⤵
- Suspicious use of WriteProcessMemory
PID:2656

C:\Windows\system32\reg.exe
reg add "HKEY_CURRENT_USER\Software\clicker\key" /v primary /t REG_DWORD /d 1
2⤵
PID:2588

C:\Windows\system32\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\7263.bat" "
1⤵
- Suspicious use of WriteProcessMemory
PID:2748

C:\Windows\system32\reg.exe
reg add "HKEY_CURRENT_USER\Software\clicker\key" /v primary /t REG_DWORD /d 1
2⤵
PID:2456

C:\Windows\system32\taskeng.exe
taskeng.exe {BA45F8D6-BD05-44B9-A08D-C7570658952B} S-1-5-21-2721934792-624042501-2768869379-1000:BISMIZHX\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2264

C:\Users\Admin\AppData\Roaming\tchwihc
C:\Users\Admin\AppData\Roaming\tchwihc
2⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
PID:1636

C:\Windows\explorer.exe
explorer.exe
1⤵
- Modifies Installed Components in the registry
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:2752

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

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

Peripheral Device Discovery

1

T1120

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\61CF.bat
Filesize
77B

MD5
55cc761bf3429324e5a0095cab002113

SHA1
2cc1ef4542a4e92d4158ab3978425d517fafd16d

SHA256
d6cceb3c71b80403364bf142f2fa4624ee0be36a49bac25ed45a497cf1ce9c3a

SHA512
33f9f5cad22d291077787c7df510806e4ac31f453d288712595af6debe579fabed6cdf4662e46e6fa94de135b161e739f55cfae05c36c87af85ed6a6ad1c9155

Download Submit
C:\Users\Admin\AppData\Roaming\tchwihc
Filesize
179KB

MD5
9fd9c907502c996750546de517da033f

SHA1
ed4a00b0a408d69434c6b4a06571d43a8bb48fe6

SHA256
7b99c632ab84f20275e3e843fea6c977e4b067bbb9793a8ec1fd70dfcd7c0655

SHA512
285456a65835536e842ab9f79ca0008ac35eb79dfc47abaab78d847403f9a2edfb6bdd1ad322be529979f2140b4c8100b2f585ebfbbf79fc561a170aac81d360

Download Submit
memory/1196-4-0x0000000002560000-0x0000000002576000-memory.dmp

Filesize
88KB

Download
memory/1196-33-0x0000000003EC0000-0x0000000003ED6000-memory.dmp

Filesize
88KB

Download
memory/1196-42-0x0000000002530000-0x0000000002531000-memory.dmp

Filesize
4KB

Download
memory/1636-36-0x0000000000400000-0x0000000002349000-memory.dmp

Filesize
31.3MB

Download
memory/2176-1-0x00000000023C0000-0x00000000024C0000-memory.dmp

Filesize
1024KB

Download
memory/2176-2-0x00000000002A0000-0x00000000002AB000-memory.dmp

Filesize
44KB

Download
memory/2176-3-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2176-8-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2176-5-0x0000000000400000-0x0000000002349000-memory.dmp

Filesize
31.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads