smokeloader | d9b33203556fafab59ac2a86ffc481da83dab9a29293639098cefd15fd686628

Resubmissions

14/03/2025, 13:03

250314-qacneavkv5 10

Analysis

max time kernel
97s
max time network
110s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
14/03/2025, 13:03

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General

Target

client.exe
Size

103KB
MD5

b53bbcfca226226405217bba4f8b2532
SHA1

6a84eb91adb4ec5b3b18929fb5e0bfd39cc41fb2
SHA256

be09ac01404b9a32552b8bea765128a3e197a4bf77e909892d00aa2d157d6871
SHA512

f8b51680dbca520ed6877ca5cc1a003258a03bdd802c69985d658375562608c004084463363c9a2ed92b7552c36ba729b1863a1693990186e0f188ff3cc1ec86
SSDEEP

1536:KOhk60PnYkfH77Xcsg23bH/0cRDrKOyaxPoWvVVZ5ElaSePrpf3n3:HuJ/hRvg2TzEla3PVH

Score

10^/10

smokeloader backdoor discovery trojan

Malware Config

Signatures

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

.NET Reactor proctector 1 IoCs

Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.

resource	yara_rule
behavioral14/memory/1700-1-0x0000000000080000-0x00000000000A0000-memory.dmp	net_reactor

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1700 set thread context of 1552	1700	client.exe	83

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2484	1700	WerFault.exe	82

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	client.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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	client.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	client.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1700 wrote to memory of 1552	1700	client.exe	83
PID 1700 wrote to memory of 1552	1700	client.exe	83
PID 1700 wrote to memory of 1552	1700	client.exe	83
PID 1700 wrote to memory of 1552	1700	client.exe	83
PID 1700 wrote to memory of 1552	1700	client.exe	83
PID 1700 wrote to memory of 1552	1700	client.exe	83

C:\Users\Admin\AppData\Local\Temp\client.exe
"C:\Users\Admin\AppData\Local\Temp\client.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1700
- C:\Users\Admin\AppData\Local\Temp\client.exe
  "C:\Users\Admin\AppData\Local\Temp\client.exe"
  2⤵
  - Checks SCSI registry key(s)
  PID:1552
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1700 -s 812
  2⤵
  - Program crash
  PID:2484

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 1700 -ip 1700
1⤵
PID:3896

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1552-6-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1552-5-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1700-0-0x00000000750FE000-0x00000000750FF000-memory.dmp

Filesize
4KB

Download
memory/1700-1-0x0000000000080000-0x00000000000A0000-memory.dmp

Filesize
128KB

Download
memory/1700-3-0x00000000750F0000-0x00000000758A0000-memory.dmp

Filesize
7.7MB

Download
memory/1700-7-0x00000000750F0000-0x00000000758A0000-memory.dmp

Filesize
7.7MB

Download
memory/1700-2-0x0000000004F40000-0x00000000054E4000-memory.dmp

Filesize
5.6MB

Download