smokeloader | bc113ed2bff68b7cf9dd805ec562bffc04fbadcf75a16df1ec6fcfa6b479f5ce

General

Target

bc113ed2bff68b7cf9dd805ec562bffc04fbadcf75a16df1ec6fcfa6b479f5ce.exe
Size

213KB
MD5

2c8f5e7a9e670c3850b2de0d2f3758b2
SHA1

42409c886411ce73c1d6f07bbae47bf8f2db713c
SHA256

bc113ed2bff68b7cf9dd805ec562bffc04fbadcf75a16df1ec6fcfa6b479f5ce
SHA512

1237d9fbc5cfd97e2377c56143a100daeeff8e71ffa90c4fa7227eab94b3edf841e8ca8b68a8ed8c18d9cc03457a4c246a98147ab317079650bcf88877211454
SSDEEP

3072:WztTEAEwLBu9QeT5Zpsnf26/5WSIKM4XLr2:WztTEAE4u9Qefp426kSIKM2Lr

Score

10^/10

smokeloader pub1 backdoor bootkit 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
Downloads MZ/PE file

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-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Active Setup\Installed Components	explorer.exe

Deletes itself 1 IoCs

Processes:

pid process

1212
Executes dropped EXE 2 IoCs

Processes:

eehvvebE60D.exe

pid process

1808 eehvveb
2136 E60D.exe
Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service
T1102

Processes:

flow ioc

15 drive.google.com
16 drive.google.com
Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
bootkit persistence

Bootkit
T1542.003

Processes:

E60D.exe

description ioc process

File opened for modification \??\PHYSICALDRIVE0 E60D.exe

pid	process
1212

pid	process
1808	eehvveb
2136	E60D.exe

flow	ioc
15	drive.google.com
16	drive.google.com

description	ioc	process
File opened for modification	\??\PHYSICALDRIVE0	E60D.exe

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:

bc113ed2bff68b7cf9dd805ec562bffc04fbadcf75a16df1ec6fcfa6b479f5ce.exeeehvveb

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	bc113ed2bff68b7cf9dd805ec562bffc04fbadcf75a16df1ec6fcfa6b479f5ce.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	bc113ed2bff68b7cf9dd805ec562bffc04fbadcf75a16df1ec6fcfa6b479f5ce.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	bc113ed2bff68b7cf9dd805ec562bffc04fbadcf75a16df1ec6fcfa6b479f5ce.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	eehvveb
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	eehvveb
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	eehvveb

Modifies registry class 5 IoCs

Processes:

explorer.exe

description	ioc	process
Set value (data)	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_Classes\Local Settings	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	explorer.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

bc113ed2bff68b7cf9dd805ec562bffc04fbadcf75a16df1ec6fcfa6b479f5ce.exe

pid	process
1756	bc113ed2bff68b7cf9dd805ec562bffc04fbadcf75a16df1ec6fcfa6b479f5ce.exe
1756	bc113ed2bff68b7cf9dd805ec562bffc04fbadcf75a16df1ec6fcfa6b479f5ce.exe
1212
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1212

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

explorer.exe

pid process

1704 explorer.exe
Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

bc113ed2bff68b7cf9dd805ec562bffc04fbadcf75a16df1ec6fcfa6b479f5ce.exeeehvveb

pid process

1756 bc113ed2bff68b7cf9dd805ec562bffc04fbadcf75a16df1ec6fcfa6b479f5ce.exe
1808 eehvveb

Suspicious use of AdjustPrivilegeToken 16 IoCs

Processes:

explorer.exeAUDIODG.EXE

description	pid	process
Token: SeShutdownPrivilege	1704	explorer.exe
Token: SeShutdownPrivilege	1704	explorer.exe
Token: SeShutdownPrivilege	1704	explorer.exe
Token: SeShutdownPrivilege	1704	explorer.exe
Token: SeShutdownPrivilege	1704	explorer.exe
Token: SeShutdownPrivilege	1704	explorer.exe
Token: SeShutdownPrivilege	1704	explorer.exe
Token: SeShutdownPrivilege	1704	explorer.exe
Token: SeShutdownPrivilege	1704	explorer.exe
Token: SeShutdownPrivilege	1704	explorer.exe
Token: 33	704	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	704	AUDIODG.EXE
Token: 33	704	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	704	AUDIODG.EXE
Token: SeShutdownPrivilege	1704	explorer.exe
Token: SeShutdownPrivilege	1704	explorer.exe

Suspicious use of FindShellTrayWindow 29 IoCs

Processes:

explorer.exe

pid	process
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe

Suspicious use of SendNotifyMessage 18 IoCs

Processes:

explorer.exe

pid	process
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe
1704	explorer.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

cmd.execmd.exetaskeng.exe

description	pid	process	target process
PID 1212 wrote to memory of 2572	1212		cmd.exe
PID 1212 wrote to memory of 2572	1212		cmd.exe
PID 1212 wrote to memory of 2572	1212		cmd.exe
PID 2572 wrote to memory of 2456	2572	cmd.exe	reg.exe
PID 2572 wrote to memory of 2456	2572	cmd.exe	reg.exe
PID 2572 wrote to memory of 2456	2572	cmd.exe	reg.exe
PID 1212 wrote to memory of 2476	1212		cmd.exe
PID 1212 wrote to memory of 2476	1212		cmd.exe
PID 1212 wrote to memory of 2476	1212		cmd.exe
PID 2476 wrote to memory of 2612	2476	cmd.exe	reg.exe
PID 2476 wrote to memory of 2612	2476	cmd.exe	reg.exe
PID 2476 wrote to memory of 2612	2476	cmd.exe	reg.exe
PID 2880 wrote to memory of 1808	2880	taskeng.exe	eehvveb
PID 2880 wrote to memory of 1808	2880	taskeng.exe	eehvveb
PID 2880 wrote to memory of 1808	2880	taskeng.exe	eehvveb
PID 2880 wrote to memory of 1808	2880	taskeng.exe	eehvveb
PID 1212 wrote to memory of 2136	1212		E60D.exe
PID 1212 wrote to memory of 2136	1212		E60D.exe
PID 1212 wrote to memory of 2136	1212		E60D.exe
PID 1212 wrote to memory of 2136	1212		E60D.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\bc113ed2bff68b7cf9dd805ec562bffc04fbadcf75a16df1ec6fcfa6b479f5ce.exe
"C:\Users\Admin\AppData\Local\Temp\bc113ed2bff68b7cf9dd805ec562bffc04fbadcf75a16df1ec6fcfa6b479f5ce.exe"
1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:1756

C:\Windows\system32\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\7BC5.bat" "
1⤵
- Suspicious use of WriteProcessMemory
PID:2572

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\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\8892.bat" "
1⤵
- Suspicious use of WriteProcessMemory
PID:2476

C:\Windows\system32\reg.exe
reg add "HKEY_CURRENT_USER\Software\clicker\key" /v primary /t REG_DWORD /d 1
2⤵
PID:2612

C:\Windows\system32\taskeng.exe
taskeng.exe {2DE0CAA3-873E-4E5B-94E0-2B022EA1D50D} S-1-5-21-2297530677-1229052932-2803917579-1000:HKULBIBU\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2880

C:\Users\Admin\AppData\Roaming\eehvveb
C:\Users\Admin\AppData\Roaming\eehvveb
2⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
PID:1808

C:\Users\Admin\AppData\Local\Temp\E60D.exe
C:\Users\Admin\AppData\Local\Temp\E60D.exe
1⤵
- Executes dropped EXE
- Writes to the Master Boot Record (MBR)
PID:2136

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:1704

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x13c
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:704

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

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Discovery

Query Registry

2

T1012

Peripheral Device Discovery

1

T1120

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

1

T1102

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\7BC5.bat
Filesize
77B

MD5
55cc761bf3429324e5a0095cab002113

SHA1
2cc1ef4542a4e92d4158ab3978425d517fafd16d

SHA256
d6cceb3c71b80403364bf142f2fa4624ee0be36a49bac25ed45a497cf1ce9c3a

SHA512
33f9f5cad22d291077787c7df510806e4ac31f453d288712595af6debe579fabed6cdf4662e46e6fa94de135b161e739f55cfae05c36c87af85ed6a6ad1c9155

Download Submit
C:\Users\Admin\AppData\Local\Temp\E60D.exe
Filesize
421KB

MD5
9185b776b7a981d060b0bb0d7ffed201

SHA1
427982fb520c099e8d2e831ace18294ade871aff

SHA256
91a45c416324ed3a8c184e349214e7c82d6df0df4fe6d06f3c7818c0d322373b

SHA512
cb46ca0c3156dc7b177fdb73869e13b229cbab8918dbb4b61a854765313fc9526aa5d7b944aa4b9acb77717c5ffd8fe955ba4eb48d75e2528ec844bfcf4aa5e8

Download Submit
C:\Users\Admin\AppData\Roaming\eehvveb
Filesize
213KB

MD5
2c8f5e7a9e670c3850b2de0d2f3758b2

SHA1
42409c886411ce73c1d6f07bbae47bf8f2db713c

SHA256
bc113ed2bff68b7cf9dd805ec562bffc04fbadcf75a16df1ec6fcfa6b479f5ce

SHA512
1237d9fbc5cfd97e2377c56143a100daeeff8e71ffa90c4fa7227eab94b3edf841e8ca8b68a8ed8c18d9cc03457a4c246a98147ab317079650bcf88877211454

Download Submit
memory/1212-4-0x0000000002EF0000-0x0000000002F06000-memory.dmp

Filesize
88KB

Download
memory/1212-33-0x0000000003E50000-0x0000000003E66000-memory.dmp

Filesize
88KB

Download
memory/1212-42-0x0000000002ED0000-0x0000000002ED1000-memory.dmp

Filesize
4KB

Download
memory/1704-51-0x0000000002960000-0x0000000002970000-memory.dmp

Filesize
64KB

Download
memory/1756-8-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1756-5-0x0000000000400000-0x0000000002AF3000-memory.dmp

Filesize
38.9MB

Download
memory/1756-2-0x0000000000220000-0x000000000022B000-memory.dmp

Filesize
44KB

Download
memory/1756-3-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1756-1-0x0000000002CD0000-0x0000000002DD0000-memory.dmp

Filesize
1024KB

Download
memory/1808-36-0x0000000000400000-0x0000000002AF3000-memory.dmp

Filesize
38.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads