smokeloader | a48d767621acecbb12a31fbd4007a16e77e6a0155d255c056f2400d0b17cfeba

General

Target

a48d767621acecbb12a31fbd4007a16e77e6a0155d255c056f2400d0b17cfeba.exe
Size

174KB
MD5

df469e0a98c5be3dbbdee404268d491a
SHA1

17951c7c3b3dbb7769efa595298ac0183e000c77
SHA256

a48d767621acecbb12a31fbd4007a16e77e6a0155d255c056f2400d0b17cfeba
SHA512

8c90c9e5b57a854b38600946659d39519a222d5cc36008ef9617df74719e662d66445ca223cff7feffabbb50ecad6028d06d436c5d8fdb349b6bf9ddd1128dfc
SSDEEP

1536:+ngptcHx6TyxkuM39m/wrut+8IGA/75IVL0tQlfYvm/ivedMzcfknx9Xb5Wyq9R9:+nZZBMtjruMGA/lxtbvma2dGTb5Wyq9

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

1136
Executes dropped EXE 2 IoCs

Processes:

tcrubwhEB99.exe

pid process

2808 tcrubwh
2984 EB99.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:

EB99.exe

description ioc process

File opened for modification \??\PHYSICALDRIVE0 EB99.exe

pid	process
1136

pid	process
2808	tcrubwh
2984	EB99.exe

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

description	ioc	process
File opened for modification	\??\PHYSICALDRIVE0	EB99.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:

a48d767621acecbb12a31fbd4007a16e77e6a0155d255c056f2400d0b17cfeba.exetcrubwh

description	ioc	process
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	a48d767621acecbb12a31fbd4007a16e77e6a0155d255c056f2400d0b17cfeba.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	tcrubwh
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	tcrubwh
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	tcrubwh
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	a48d767621acecbb12a31fbd4007a16e77e6a0155d255c056f2400d0b17cfeba.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	a48d767621acecbb12a31fbd4007a16e77e6a0155d255c056f2400d0b17cfeba.exe

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\NodeSlots	explorer.exe
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

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

a48d767621acecbb12a31fbd4007a16e77e6a0155d255c056f2400d0b17cfeba.exe

pid	process
1584	a48d767621acecbb12a31fbd4007a16e77e6a0155d255c056f2400d0b17cfeba.exe
1584	a48d767621acecbb12a31fbd4007a16e77e6a0155d255c056f2400d0b17cfeba.exe
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136
1136

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

explorer.exe

pid process

2304 explorer.exe
Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

a48d767621acecbb12a31fbd4007a16e77e6a0155d255c056f2400d0b17cfeba.exetcrubwh

pid process

1584 a48d767621acecbb12a31fbd4007a16e77e6a0155d255c056f2400d0b17cfeba.exe
2808 tcrubwh

Suspicious use of AdjustPrivilegeToken 16 IoCs

Processes:

explorer.exeAUDIODG.EXE

description	pid	process
Token: SeShutdownPrivilege	2304	explorer.exe
Token: SeShutdownPrivilege	2304	explorer.exe
Token: SeShutdownPrivilege	2304	explorer.exe
Token: SeShutdownPrivilege	2304	explorer.exe
Token: SeShutdownPrivilege	2304	explorer.exe
Token: SeShutdownPrivilege	2304	explorer.exe
Token: SeShutdownPrivilege	2304	explorer.exe
Token: SeShutdownPrivilege	2304	explorer.exe
Token: SeShutdownPrivilege	2304	explorer.exe
Token: SeShutdownPrivilege	2304	explorer.exe
Token: 33	544	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	544	AUDIODG.EXE
Token: 33	544	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	544	AUDIODG.EXE
Token: SeShutdownPrivilege	2304	explorer.exe
Token: SeShutdownPrivilege	2304	explorer.exe

Suspicious use of FindShellTrayWindow 29 IoCs

Processes:

explorer.exe

pid	process
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe

Suspicious use of SendNotifyMessage 17 IoCs

Processes:

explorer.exe

pid	process
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe
2304	explorer.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

cmd.execmd.exetaskeng.exe

description	pid	process	target process
PID 1136 wrote to memory of 2584	1136		cmd.exe
PID 1136 wrote to memory of 2584	1136		cmd.exe
PID 1136 wrote to memory of 2584	1136		cmd.exe
PID 2584 wrote to memory of 2776	2584	cmd.exe	reg.exe
PID 2584 wrote to memory of 2776	2584	cmd.exe	reg.exe
PID 2584 wrote to memory of 2776	2584	cmd.exe	reg.exe
PID 1136 wrote to memory of 2496	1136		cmd.exe
PID 1136 wrote to memory of 2496	1136		cmd.exe
PID 1136 wrote to memory of 2496	1136		cmd.exe
PID 2496 wrote to memory of 2452	2496	cmd.exe	reg.exe
PID 2496 wrote to memory of 2452	2496	cmd.exe	reg.exe
PID 2496 wrote to memory of 2452	2496	cmd.exe	reg.exe
PID 2692 wrote to memory of 2808	2692	taskeng.exe	tcrubwh
PID 2692 wrote to memory of 2808	2692	taskeng.exe	tcrubwh
PID 2692 wrote to memory of 2808	2692	taskeng.exe	tcrubwh
PID 2692 wrote to memory of 2808	2692	taskeng.exe	tcrubwh
PID 1136 wrote to memory of 2984	1136		EB99.exe
PID 1136 wrote to memory of 2984	1136		EB99.exe
PID 1136 wrote to memory of 2984	1136		EB99.exe
PID 1136 wrote to memory of 2984	1136		EB99.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\a48d767621acecbb12a31fbd4007a16e77e6a0155d255c056f2400d0b17cfeba.exe
"C:\Users\Admin\AppData\Local\Temp\a48d767621acecbb12a31fbd4007a16e77e6a0155d255c056f2400d0b17cfeba.exe"
1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:1584

C:\Windows\system32\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\6BDD.bat" "
1⤵
- Suspicious use of WriteProcessMemory
PID:2584

C:\Windows\system32\reg.exe
reg add "HKEY_CURRENT_USER\Software\clicker\key" /v primary /t REG_DWORD /d 1
2⤵
PID:2776

C:\Windows\system32\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\7E74.bat" "
1⤵
- Suspicious use of WriteProcessMemory
PID:2496

C:\Windows\system32\reg.exe
reg add "HKEY_CURRENT_USER\Software\clicker\key" /v primary /t REG_DWORD /d 1
2⤵
PID:2452

C:\Windows\system32\taskeng.exe
taskeng.exe {E7E3F504-59A5-4831-81E9-2E574AD45E2E} S-1-5-21-2297530677-1229052932-2803917579-1000:HKULBIBU\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2692

C:\Users\Admin\AppData\Roaming\tcrubwh
C:\Users\Admin\AppData\Roaming\tcrubwh
2⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
PID:2808

C:\Users\Admin\AppData\Local\Temp\EB99.exe
C:\Users\Admin\AppData\Local\Temp\EB99.exe
1⤵
- Executes dropped EXE
- Writes to the Master Boot Record (MBR)
PID:2984

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:2304

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x1cc
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:544

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\6BDD.bat

Filesize
77B

MD5
55cc761bf3429324e5a0095cab002113

SHA1
2cc1ef4542a4e92d4158ab3978425d517fafd16d

SHA256
d6cceb3c71b80403364bf142f2fa4624ee0be36a49bac25ed45a497cf1ce9c3a

SHA512
33f9f5cad22d291077787c7df510806e4ac31f453d288712595af6debe579fabed6cdf4662e46e6fa94de135b161e739f55cfae05c36c87af85ed6a6ad1c9155

Download Submit
C:\Users\Admin\AppData\Local\Temp\EB99.exe

Filesize
421KB

MD5
9185b776b7a981d060b0bb0d7ffed201

SHA1
427982fb520c099e8d2e831ace18294ade871aff

SHA256
91a45c416324ed3a8c184e349214e7c82d6df0df4fe6d06f3c7818c0d322373b

SHA512
cb46ca0c3156dc7b177fdb73869e13b229cbab8918dbb4b61a854765313fc9526aa5d7b944aa4b9acb77717c5ffd8fe955ba4eb48d75e2528ec844bfcf4aa5e8

Download Submit
C:\Users\Admin\AppData\Roaming\tcrubwh

Filesize
174KB

MD5
df469e0a98c5be3dbbdee404268d491a

SHA1
17951c7c3b3dbb7769efa595298ac0183e000c77

SHA256
a48d767621acecbb12a31fbd4007a16e77e6a0155d255c056f2400d0b17cfeba

SHA512
8c90c9e5b57a854b38600946659d39519a222d5cc36008ef9617df74719e662d66445ca223cff7feffabbb50ecad6028d06d436c5d8fdb349b6bf9ddd1128dfc

Download Submit
memory/1136-4-0x0000000002D10000-0x0000000002D26000-memory.dmp

Filesize
88KB

Download
memory/1136-33-0x0000000002E30000-0x0000000002E46000-memory.dmp

Filesize
88KB

Download
memory/1136-45-0x0000000002620000-0x0000000002621000-memory.dmp

Filesize
4KB

Download
memory/1584-1-0x0000000002CC0000-0x0000000002DC0000-memory.dmp

Filesize
1024KB

Download
memory/1584-2-0x0000000000220000-0x000000000022B000-memory.dmp

Filesize
44KB

Download
memory/1584-3-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1584-8-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1584-5-0x0000000000400000-0x0000000002AE9000-memory.dmp

Filesize
38.9MB

Download
memory/2808-34-0x0000000000400000-0x0000000002AE9000-memory.dmp

Filesize
38.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads