smokeloader | f403e5db7055c16c5608a7c5c5e8d72541f88a83720b84f6ee2a8ed7212f75a8

Analysis

max time kernel
171s
max time network
178s
platform
windows10-2004_x64
resource
win10v2004-en-20220112
submitted
20-01-2022 18:11

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General

Target

7zS850A099E/61e74fd41f841_Tue2365aa82b7.exe
Size

267KB
MD5

9e967a473010b430f5bde8d23b0cb9a6
SHA1

eed882f8ff642d0da9e89371e3ce75c1be317ad2
SHA256

66b03cc7950fb0df8607d07c4bdd45c74d2da333dcdbd97c5192c8b36b5ce039
SHA512

8916a36c24da3ef89066e226179e32ac3714ad72965e42f14fd38c6387c61c82118e519633f3ba628f5d3d5a45d237bdca7d6325d22599b2948503b0f2866fb7

Score

10^/10

smokeloader backdoor persistence trojan

Malware Config

Extracted

Family

smokeloader

Version

2020

http://host-data-coin-11.com/

http://file-coin-host-12.com/

rc4.i32

Signatures

SmokeLoader
Modular backdoor trojan in use since 2014.
trojan backdoor smokeloader
Sets service image path in registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112
Suspicious use of SetThreadContext 1 IoCs

Processes:

61e74fd41f841_Tue2365aa82b7.exe

description pid process target process

PID 3500 set thread context of 3092 3500 61e74fd41f841_Tue2365aa82b7.exe 61e74fd41f841_Tue2365aa82b7.exe

description	pid	process	target process
PID 3500 set thread context of 3092	3500	61e74fd41f841_Tue2365aa82b7.exe	61e74fd41f841_Tue2365aa82b7.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:

61e74fd41f841_Tue2365aa82b7.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	61e74fd41f841_Tue2365aa82b7.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	61e74fd41f841_Tue2365aa82b7.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	61e74fd41f841_Tue2365aa82b7.exe

Modifies data under HKEY_USERS 41 IoCs

Processes:

WaaSMedicAgent.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates	WaaSMedicAgent.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

61e74fd41f841_Tue2365aa82b7.exe

pid	process
3092	61e74fd41f841_Tue2365aa82b7.exe
3092	61e74fd41f841_Tue2365aa82b7.exe
2412
2412
2412
2412
2412
2412
2412
2412
2412
2412
2412
2412
2412
2412
2412
2412
2412
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2412
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2412
2412
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2412
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2412
2412
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2412
2412
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2412
2412
2412
2412
2412
2412
2412
2412
2412
2412
2412
2412
2412
2412
2412

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

pid process

2412
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

61e74fd41f841_Tue2365aa82b7.exe

pid process

3092 61e74fd41f841_Tue2365aa82b7.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

description pid process

Token: SeShutdownPrivilege 2412
Token: SeCreatePagefilePrivilege 2412
Suspicious use of UnmapMainImage 1 IoCs

Processes:

pid process

2412

pid	process
2412

description	pid	process
Token: SeShutdownPrivilege	2412
Token: SeCreatePagefilePrivilege	2412

pid	process
2412

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

61e74fd41f841_Tue2365aa82b7.exe

description	pid	process	target process
PID 3500 wrote to memory of 3092	3500	61e74fd41f841_Tue2365aa82b7.exe	61e74fd41f841_Tue2365aa82b7.exe
PID 3500 wrote to memory of 3092	3500	61e74fd41f841_Tue2365aa82b7.exe	61e74fd41f841_Tue2365aa82b7.exe
PID 3500 wrote to memory of 3092	3500	61e74fd41f841_Tue2365aa82b7.exe	61e74fd41f841_Tue2365aa82b7.exe
PID 3500 wrote to memory of 3092	3500	61e74fd41f841_Tue2365aa82b7.exe	61e74fd41f841_Tue2365aa82b7.exe
PID 3500 wrote to memory of 3092	3500	61e74fd41f841_Tue2365aa82b7.exe	61e74fd41f841_Tue2365aa82b7.exe
PID 3500 wrote to memory of 3092	3500	61e74fd41f841_Tue2365aa82b7.exe	61e74fd41f841_Tue2365aa82b7.exe

C:\Users\Admin\AppData\Local\Temp\7zS850A099E\61e74fd41f841_Tue2365aa82b7.exe
"C:\Users\Admin\AppData\Local\Temp\7zS850A099E\61e74fd41f841_Tue2365aa82b7.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3500

C:\Users\Admin\AppData\Local\Temp\7zS850A099E\61e74fd41f841_Tue2365aa82b7.exe
"C:\Users\Admin\AppData\Local\Temp\7zS850A099E\61e74fd41f841_Tue2365aa82b7.exe"
2⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:3092

C:\Windows\System32\WaaSMedicAgent.exe
C:\Windows\System32\WaaSMedicAgent.exe 896e9bb9b2dcae226a917e29853acbab Lvb1gL9tqkCSSd897/dWMA.0.1.0.0.0
1⤵
- Modifies data under HKEY_USERS
PID:3652

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/2412-137-0x0000000000C40000-0x0000000000C56000-memory.dmp

Filesize
88KB

Download
memory/3092-135-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/3092-136-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/3500-133-0x0000000000030000-0x0000000000039000-memory.dmp

Filesize
36KB

Download
memory/3500-134-0x0000000000490000-0x0000000000499000-memory.dmp

Filesize
36KB

Download