smokeloader | 2b396ae1fa95ef655bb7b0eb45532a857d882bb601adeb8fb1b5d43dcff9ec31

General

Target

Fri0541e16ce794d258f.exe
Size

284KB
MD5

dec69c757ce1ae8454f97ef6966aa817
SHA1

160d556701a012ab18194aeecaa396e21727c9b2
SHA256

2b396ae1fa95ef655bb7b0eb45532a857d882bb601adeb8fb1b5d43dcff9ec31
SHA512

c6304aa1a5b762804c81461fb1db1bae9ba57120c279dfb1ad83c3bb2e3309563f15c90a1a04a9f3acb5aac3a527432a87d1bb7ba32846dc75bda961b162db16

Score

10^/10

smokeloader backdoor trojan

Malware Config

Extracted

Family

smokeloader

Version

2020

C2

http://directorycart.com/upload/

http://tierzahnarzt.at/upload/

http://streetofcards.com/upload/

http://ycdfzd.com/upload/

http://successcoachceo.com/upload/

http://uhvu.cn/upload/

http://japanarticle.com/upload/

rc4.i32

Signatures

SmokeLoader
Modular backdoor trojan in use since 2014.
trojan backdoor smokeloader
Executes dropped EXE 3 IoCs

Processes:

retahhhretahhhretahhh

pid process

856 retahhh
1072 retahhh
1672 retahhh
Deletes itself 1 IoCs

Processes:

pid process

1360

pid	process
856	retahhh
1072	retahhh
1672	retahhh

pid	process
1360

Checks SCSI registry key(s) 3 TTPs 12 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

retahhhretahhhretahhhFri0541e16ce794d258f.exe

description	ioc	process
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	retahhh
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	retahhh
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	retahhh
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	retahhh
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	Fri0541e16ce794d258f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	retahhh
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	retahhh
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	retahhh
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	retahhh
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	Fri0541e16ce794d258f.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	Fri0541e16ce794d258f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	retahhh

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

Fri0541e16ce794d258f.exe

pid	process
1288	Fri0541e16ce794d258f.exe
1288	Fri0541e16ce794d258f.exe
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360
1360

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

pid process

1360
Suspicious behavior: MapViewOfSection 4 IoCs

Processes:

Fri0541e16ce794d258f.exeretahhhretahhhretahhh

pid process

1288 Fri0541e16ce794d258f.exe
856 retahhh
1072 retahhh
1672 retahhh

pid	process
1360

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

description	pid	process
Token: SeShutdownPrivilege	1360
Token: SeShutdownPrivilege	1360
Token: SeShutdownPrivilege	1360
Token: SeShutdownPrivilege	1360
Token: SeShutdownPrivilege	1360
Token: SeShutdownPrivilege	1360

Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

pid process

1360
1360
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

pid process

1360
1360

pid	process
1360
1360

pid	process
1360
1360

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

taskeng.exetaskeng.exetaskeng.exe

description	pid	process	target process
PID 1728 wrote to memory of 856	1728	taskeng.exe	retahhh
PID 1728 wrote to memory of 856	1728	taskeng.exe	retahhh
PID 1728 wrote to memory of 856	1728	taskeng.exe	retahhh
PID 1728 wrote to memory of 856	1728	taskeng.exe	retahhh
PID 1728 wrote to memory of 1520	1728	taskeng.exe	default-browser-agent.exe
PID 1728 wrote to memory of 1520	1728	taskeng.exe	default-browser-agent.exe
PID 1728 wrote to memory of 1520	1728	taskeng.exe	default-browser-agent.exe
PID 1728 wrote to memory of 1740	1728	taskeng.exe	default-browser-agent.exe
PID 1728 wrote to memory of 1740	1728	taskeng.exe	default-browser-agent.exe
PID 1728 wrote to memory of 1740	1728	taskeng.exe	default-browser-agent.exe
PID 672 wrote to memory of 1072	672	taskeng.exe	retahhh
PID 672 wrote to memory of 1072	672	taskeng.exe	retahhh
PID 672 wrote to memory of 1072	672	taskeng.exe	retahhh
PID 672 wrote to memory of 1072	672	taskeng.exe	retahhh
PID 948 wrote to memory of 1672	948	taskeng.exe	retahhh
PID 948 wrote to memory of 1672	948	taskeng.exe	retahhh
PID 948 wrote to memory of 1672	948	taskeng.exe	retahhh
PID 948 wrote to memory of 1672	948	taskeng.exe	retahhh

C:\Users\Admin\AppData\Local\Temp\Fri0541e16ce794d258f.exe
"C:\Users\Admin\AppData\Local\Temp\Fri0541e16ce794d258f.exe"
1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:1288

C:\Windows\system32\taskeng.exe
taskeng.exe {4E28CDC7-A36E-4012-9CA9-315B17E7D889} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
PID:1168

C:\Windows\system32\taskeng.exe
taskeng.exe {93A37B5E-65CA-41E3-9E66-E818A05F3E03} S-1-5-21-2955169046-2371869340-1800780948-1000:UKNHJUQT\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1728

C:\Users\Admin\AppData\Roaming\retahhh
C:\Users\Admin\AppData\Roaming\retahhh
2⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
PID:856

C:\Program Files\Mozilla Firefox\default-browser-agent.exe
"C:\Program Files\Mozilla Firefox\default-browser-agent.exe" do-task
2⤵
PID:1520

C:\Program Files\Mozilla Firefox\default-browser-agent.exe
"C:\Program Files\Mozilla Firefox\default-browser-agent.exe" do-task
2⤵
PID:1740

C:\Windows\system32\taskeng.exe
taskeng.exe {0EAABEC2-F4CB-48B9-A013-FC5FE13B3038} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
PID:1412

C:\Windows\system32\taskeng.exe
taskeng.exe {92B421D0-09C5-46F2-B7B9-01BD8655506D} S-1-5-21-2955169046-2371869340-1800780948-1000:UKNHJUQT\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:672

C:\Users\Admin\AppData\Roaming\retahhh
C:\Users\Admin\AppData\Roaming\retahhh
2⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
PID:1072

C:\Windows\system32\taskeng.exe
taskeng.exe {FB6DA47D-80B0-4638-9248-6E375F16FB3F} S-1-5-21-2955169046-2371869340-1800780948-1000:UKNHJUQT\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:948

C:\Users\Admin\AppData\Roaming\retahhh
C:\Users\Admin\AppData\Roaming\retahhh
2⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious behavior: MapViewOfSection
PID:1672

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Peripheral Device Discovery

1

T1120

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\retahhh
MD5
dec69c757ce1ae8454f97ef6966aa817

SHA1
160d556701a012ab18194aeecaa396e21727c9b2

SHA256
2b396ae1fa95ef655bb7b0eb45532a857d882bb601adeb8fb1b5d43dcff9ec31

SHA512
c6304aa1a5b762804c81461fb1db1bae9ba57120c279dfb1ad83c3bb2e3309563f15c90a1a04a9f3acb5aac3a527432a87d1bb7ba32846dc75bda961b162db16

Download Submit
C:\Users\Admin\AppData\Roaming\retahhh
MD5
dec69c757ce1ae8454f97ef6966aa817

SHA1
160d556701a012ab18194aeecaa396e21727c9b2

SHA256
2b396ae1fa95ef655bb7b0eb45532a857d882bb601adeb8fb1b5d43dcff9ec31

SHA512
c6304aa1a5b762804c81461fb1db1bae9ba57120c279dfb1ad83c3bb2e3309563f15c90a1a04a9f3acb5aac3a527432a87d1bb7ba32846dc75bda961b162db16

Download Submit
C:\Users\Admin\AppData\Roaming\retahhh
MD5
dec69c757ce1ae8454f97ef6966aa817

SHA1
160d556701a012ab18194aeecaa396e21727c9b2

SHA256
2b396ae1fa95ef655bb7b0eb45532a857d882bb601adeb8fb1b5d43dcff9ec31

SHA512
c6304aa1a5b762804c81461fb1db1bae9ba57120c279dfb1ad83c3bb2e3309563f15c90a1a04a9f3acb5aac3a527432a87d1bb7ba32846dc75bda961b162db16

Download Submit
C:\Users\Admin\AppData\Roaming\retahhh
MD5
dec69c757ce1ae8454f97ef6966aa817

SHA1
160d556701a012ab18194aeecaa396e21727c9b2

SHA256
2b396ae1fa95ef655bb7b0eb45532a857d882bb601adeb8fb1b5d43dcff9ec31

SHA512
c6304aa1a5b762804c81461fb1db1bae9ba57120c279dfb1ad83c3bb2e3309563f15c90a1a04a9f3acb5aac3a527432a87d1bb7ba32846dc75bda961b162db16

Download Submit
memory/856-61-0x0000000000000000-mapping.dmp

Download
memory/856-65-0x0000000000400000-0x0000000000877000-memory.dmp

Filesize
4.5MB

Download
memory/856-63-0x0000000000918000-0x0000000000929000-memory.dmp

Filesize
68KB

Download
memory/1072-71-0x0000000000948000-0x0000000000959000-memory.dmp

Filesize
68KB

Download
memory/1072-69-0x0000000000000000-mapping.dmp

Download
memory/1072-73-0x0000000000400000-0x0000000000877000-memory.dmp

Filesize
4.5MB

Download
memory/1288-58-0x0000000000400000-0x0000000000877000-memory.dmp

Filesize
4.5MB

Download
memory/1288-56-0x0000000076AA1000-0x0000000076AA3000-memory.dmp

Filesize
8KB

Download
memory/1288-55-0x00000000009A9000-0x00000000009B9000-memory.dmp

Filesize
64KB

Download
memory/1288-57-0x0000000000020000-0x0000000000029000-memory.dmp

Filesize
36KB

Download
memory/1360-74-0x0000000003D90000-0x0000000003DA6000-memory.dmp

Filesize
88KB

Download
memory/1360-59-0x00000000025F0000-0x0000000002606000-memory.dmp

Filesize
88KB

Download
memory/1360-66-0x0000000004020000-0x0000000004036000-memory.dmp

Filesize
88KB

Download
memory/1360-80-0x0000000003DD0000-0x0000000003DE6000-memory.dmp

Filesize
88KB

Download
memory/1520-67-0x0000000000000000-mapping.dmp

Download
memory/1672-75-0x0000000000000000-mapping.dmp

Download
memory/1672-77-0x00000000009C8000-0x00000000009D9000-memory.dmp

Filesize
68KB

Download
memory/1672-79-0x0000000000400000-0x0000000000877000-memory.dmp

Filesize
4.5MB

Download
memory/1740-68-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads