smokeloader | fe2a9057323a5a5d47a4ab3cf9f4f9f86037b395c440da7bfb1e4164bc10abc3

General

Target

tmp.exe
Size

37KB
MD5

b5930c6fbf0ecde4de2ba77415b97e18
SHA1

67cab99dc14822289f9b8d1f0fb0e9d73ff45825
SHA256

fe2a9057323a5a5d47a4ab3cf9f4f9f86037b395c440da7bfb1e4164bc10abc3
SHA512

63140881d7b03db395608b1fe095b0989aa2d87d017ae63eea34c8b3e04c3274ccc7ee31a4505c8334af1300844c4aec30a6a25dc692a34ec699b728a85620ea
SSDEEP

384:O9kt7+7uIb00ERLA6m8KXAX3H3JGm9bN1v5N9EJqgxWUrxMKQ4XyY:vNTIcI8tX9B55gqgxWFKQiH

Score

10^/10

smokeloader backdoor persistence trojan

Malware Config

Signatures

Detects Smokeloader packer 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1504-65-0x0000000000400000-0x0000000000409000-memory.dmp	family_smokeloader
behavioral1/memory/1504-66-0x0000000000402E0F-mapping.dmp	family_smokeloader
behavioral1/memory/1504-68-0x0000000000400000-0x0000000000409000-memory.dmp	family_smokeloader
behavioral1/memory/1504-69-0x0000000000400000-0x0000000000409000-memory.dmp	family_smokeloader

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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

tmp.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\Amkufwqq = "\"C:\\Users\\Admin\\AppData\\Roaming\\Zsiicjamy\\Amkufwqq.exe\""	tmp.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

tmp.exe

description pid process target process

PID 1600 set thread context of 1504 1600 tmp.exe InstallUtil.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	pid	process	target process
PID 1600 set thread context of 1504	1600	tmp.exe	InstallUtil.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:

InstallUtil.exe

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

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

powershell.exeInstallUtil.exe

pid	process
780	powershell.exe
1504	InstallUtil.exe
1504	InstallUtil.exe
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Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

pid process

1208
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

InstallUtil.exe

pid process

1504 InstallUtil.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

tmp.exepowershell.exe

description pid process

Token: SeDebugPrivilege 1600 tmp.exe
Token: SeDebugPrivilege 780 powershell.exe

pid	process
1208

pid	process
1504	InstallUtil.exe

description	pid	process
Token: SeDebugPrivilege	1600	tmp.exe
Token: SeDebugPrivilege	780	powershell.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

tmp.exe

description	pid	process	target process
PID 1600 wrote to memory of 780	1600	tmp.exe	powershell.exe
PID 1600 wrote to memory of 780	1600	tmp.exe	powershell.exe
PID 1600 wrote to memory of 780	1600	tmp.exe	powershell.exe
PID 1600 wrote to memory of 780	1600	tmp.exe	powershell.exe
PID 1600 wrote to memory of 1504	1600	tmp.exe	InstallUtil.exe
PID 1600 wrote to memory of 1504	1600	tmp.exe	InstallUtil.exe
PID 1600 wrote to memory of 1504	1600	tmp.exe	InstallUtil.exe
PID 1600 wrote to memory of 1504	1600	tmp.exe	InstallUtil.exe
PID 1600 wrote to memory of 1504	1600	tmp.exe	InstallUtil.exe
PID 1600 wrote to memory of 1504	1600	tmp.exe	InstallUtil.exe
PID 1600 wrote to memory of 1504	1600	tmp.exe	InstallUtil.exe
PID 1600 wrote to memory of 1504	1600	tmp.exe	InstallUtil.exe
PID 1600 wrote to memory of 1504	1600	tmp.exe	InstallUtil.exe
PID 1600 wrote to memory of 1504	1600	tmp.exe	InstallUtil.exe

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1600

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMgAwAA==
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:780

C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
2⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:1504

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/780-61-0x000000006ED70000-0x000000006F31B000-memory.dmp

Filesize
5.7MB

Download
memory/780-57-0x0000000000000000-mapping.dmp

Download
memory/780-59-0x000000006ED70000-0x000000006F31B000-memory.dmp

Filesize
5.7MB

Download
memory/780-60-0x000000006ED70000-0x000000006F31B000-memory.dmp

Filesize
5.7MB

Download
memory/1208-70-0x000007FEFA860000-0x000007FEFA9A3000-memory.dmp

Filesize
1.3MB

Download
memory/1208-71-0x000007FF31EF0000-0x000007FF31EFA000-memory.dmp

Filesize
40KB

Download
memory/1504-63-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/1504-62-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/1504-65-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/1504-66-0x0000000000402E0F-mapping.dmp

Download
memory/1504-68-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/1504-69-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/1600-54-0x0000000000C60000-0x0000000000C6E000-memory.dmp

Filesize
56KB

Download
memory/1600-55-0x00000000752B1000-0x00000000752B3000-memory.dmp

Filesize
8KB

Download
memory/1600-56-0x0000000005AC0000-0x0000000005CF4000-memory.dmp

Filesize
2.2MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads