smokeloader | f24a559e79ba3121c7e0fed4ac995da056fe6a0dac71b2360f9e340b97117d05

Resubmissions

26-08-2021 21:12

210826-flswvxb8js 10

13-08-2021 07:22

210813-9241gpvrbs 10

Analysis

max time kernel
1802s
max time network
1529s
platform
windows7_x64
resource
win7v20210410
submitted
26-08-2021 21:12

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General

Target

06a029882deabf229f62728afe3baf4f.exe
Size

319KB
MD5

06a029882deabf229f62728afe3baf4f
SHA1

33a5953fbcce8761af1e68df9c9f4ad153c4a536
SHA256

f24a559e79ba3121c7e0fed4ac995da056fe6a0dac71b2360f9e340b97117d05
SHA512

a81631eef6163f437e5bdf83156d26856653411dc6b9becc5580a83b9a4123faec5855d625beec15b1f71c3155624187f776f56b4f58e5f87e9f39bd8b61ba88

Score

10^/10

smokeloader backdoor trojan

Malware Config

Extracted

Family

smokeloader

Version

2020

http://readinglistforjuly1.xyz/

http://readinglistforjuly2.xyz/

http://readinglistforjuly3.xyz/

http://readinglistforjuly4.xyz/

http://readinglistforjuly5.xyz/

http://readinglistforjuly6.xyz/

http://readinglistforjuly7.xyz/

http://readinglistforjuly8.xyz/

http://readinglistforjuly9.xyz/

http://readinglistforjuly10.xyz/

http://readinglistforjuly1.site/

http://readinglistforjuly2.site/

http://readinglistforjuly3.site/

http://readinglistforjuly4.site/

http://readinglistforjuly5.site/

http://readinglistforjuly6.site/

http://readinglistforjuly7.site/

http://readinglistforjuly8.site/

http://readinglistforjuly9.site/

http://readinglistforjuly10.site/

rc4.i32

Signatures

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

Executes dropped EXE 6 IoCs

Processes:

igsbjfwigsbjfwigsbjfwigsbjfwigsbjfwigsbjfw

pid	Process
1892	igsbjfw
432	igsbjfw
1364	igsbjfw
1220	igsbjfw
1476	igsbjfw
572	igsbjfw

Deletes itself 1 IoCs

Processes:

pid	Process
1256

Suspicious use of SetThreadContext 4 IoCs

Processes:

06a029882deabf229f62728afe3baf4f.exeigsbjfwigsbjfwigsbjfw

description	pid	Process	procid_target
PID 2028 set thread context of 1884	2028	06a029882deabf229f62728afe3baf4f.exe	27
PID 1892 set thread context of 432	1892	igsbjfw	32
PID 1364 set thread context of 1220	1364	igsbjfw	35
PID 1476 set thread context of 572	1476	igsbjfw	38

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:

igsbjfwigsbjfwigsbjfw06a029882deabf229f62728afe3baf4f.exe

description	ioc	Process
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	igsbjfw
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	igsbjfw
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	igsbjfw
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	igsbjfw
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	igsbjfw
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	06a029882deabf229f62728afe3baf4f.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	06a029882deabf229f62728afe3baf4f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	igsbjfw
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	igsbjfw
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	06a029882deabf229f62728afe3baf4f.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	igsbjfw
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	igsbjfw

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

06a029882deabf229f62728afe3baf4f.exe

pid	Process
1884	06a029882deabf229f62728afe3baf4f.exe
1884	06a029882deabf229f62728afe3baf4f.exe
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256
1256

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

pid	Process
1256

Suspicious behavior: MapViewOfSection 4 IoCs

Processes:

06a029882deabf229f62728afe3baf4f.exeigsbjfwigsbjfwigsbjfw

pid	Process
1884	06a029882deabf229f62728afe3baf4f.exe
432	igsbjfw
1220	igsbjfw
572	igsbjfw

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

description	pid	Process
Token: SeShutdownPrivilege	1256
Token: SeShutdownPrivilege	1256
Token: SeShutdownPrivilege	1256
Token: SeShutdownPrivilege	1256
Token: SeShutdownPrivilege	1256

Suspicious use of FindShellTrayWindow 6 IoCs

Processes:

pid	Process
1256
1256
1256
1256
1256
1256

Suspicious use of SendNotifyMessage 6 IoCs

Processes:

pid	Process
1256
1256
1256
1256
1256
1256

Suspicious use of WriteProcessMemory 40 IoCs

Processes:

06a029882deabf229f62728afe3baf4f.exetaskeng.exeigsbjfwtaskeng.exeigsbjfwtaskeng.exeigsbjfw

description	pid	Process	procid_target
PID 2028 wrote to memory of 1884	2028	06a029882deabf229f62728afe3baf4f.exe	27
PID 2028 wrote to memory of 1884	2028	06a029882deabf229f62728afe3baf4f.exe	27
PID 2028 wrote to memory of 1884	2028	06a029882deabf229f62728afe3baf4f.exe	27
PID 2028 wrote to memory of 1884	2028	06a029882deabf229f62728afe3baf4f.exe	27
PID 2028 wrote to memory of 1884	2028	06a029882deabf229f62728afe3baf4f.exe	27
PID 2028 wrote to memory of 1884	2028	06a029882deabf229f62728afe3baf4f.exe	27
PID 2028 wrote to memory of 1884	2028	06a029882deabf229f62728afe3baf4f.exe	27
PID 1064 wrote to memory of 1892	1064	taskeng.exe	31
PID 1064 wrote to memory of 1892	1064	taskeng.exe	31
PID 1064 wrote to memory of 1892	1064	taskeng.exe	31
PID 1064 wrote to memory of 1892	1064	taskeng.exe	31
PID 1892 wrote to memory of 432	1892	igsbjfw	32
PID 1892 wrote to memory of 432	1892	igsbjfw	32
PID 1892 wrote to memory of 432	1892	igsbjfw	32
PID 1892 wrote to memory of 432	1892	igsbjfw	32
PID 1892 wrote to memory of 432	1892	igsbjfw	32
PID 1892 wrote to memory of 432	1892	igsbjfw	32
PID 1892 wrote to memory of 432	1892	igsbjfw	32
PID 1836 wrote to memory of 1364	1836	taskeng.exe	34
PID 1836 wrote to memory of 1364	1836	taskeng.exe	34
PID 1836 wrote to memory of 1364	1836	taskeng.exe	34
PID 1836 wrote to memory of 1364	1836	taskeng.exe	34
PID 1364 wrote to memory of 1220	1364	igsbjfw	35
PID 1364 wrote to memory of 1220	1364	igsbjfw	35
PID 1364 wrote to memory of 1220	1364	igsbjfw	35
PID 1364 wrote to memory of 1220	1364	igsbjfw	35
PID 1364 wrote to memory of 1220	1364	igsbjfw	35
PID 1364 wrote to memory of 1220	1364	igsbjfw	35
PID 1364 wrote to memory of 1220	1364	igsbjfw	35
PID 1960 wrote to memory of 1476	1960	taskeng.exe	37
PID 1960 wrote to memory of 1476	1960	taskeng.exe	37
PID 1960 wrote to memory of 1476	1960	taskeng.exe	37
PID 1960 wrote to memory of 1476	1960	taskeng.exe	37
PID 1476 wrote to memory of 572	1476	igsbjfw	38
PID 1476 wrote to memory of 572	1476	igsbjfw	38
PID 1476 wrote to memory of 572	1476	igsbjfw	38
PID 1476 wrote to memory of 572	1476	igsbjfw	38
PID 1476 wrote to memory of 572	1476	igsbjfw	38
PID 1476 wrote to memory of 572	1476	igsbjfw	38
PID 1476 wrote to memory of 572	1476	igsbjfw	38

C:\Users\Admin\AppData\Local\Temp\06a029882deabf229f62728afe3baf4f.exe
"C:\Users\Admin\AppData\Local\Temp\06a029882deabf229f62728afe3baf4f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2028
- C:\Users\Admin\AppData\Local\Temp\06a029882deabf229f62728afe3baf4f.exe
  "C:\Users\Admin\AppData\Local\Temp\06a029882deabf229f62728afe3baf4f.exe"
  2⤵
  - Checks SCSI registry key(s)
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  PID:1884

C:\Windows\system32\taskeng.exe
taskeng.exe {23F95815-4725-43B7-B569-6A4E0501AD15} S-1-5-21-2513283230-931923277-594887482-1000:MRBKYMNO\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1064
- C:\Users\Admin\AppData\Roaming\igsbjfw
  C:\Users\Admin\AppData\Roaming\igsbjfw
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:1892
- - C:\Users\Admin\AppData\Roaming\igsbjfw
    C:\Users\Admin\AppData\Roaming\igsbjfw
    3⤵
    - Executes dropped EXE
    - Checks SCSI registry key(s)
    - Suspicious behavior: MapViewOfSection
    PID:432

C:\Windows\system32\taskeng.exe
taskeng.exe {0C5E7FB4-C9BA-40C4-859C-796B96D8B13D} S-1-5-21-2513283230-931923277-594887482-1000:MRBKYMNO\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1836
- C:\Users\Admin\AppData\Roaming\igsbjfw
  C:\Users\Admin\AppData\Roaming\igsbjfw
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:1364
- - C:\Users\Admin\AppData\Roaming\igsbjfw
    C:\Users\Admin\AppData\Roaming\igsbjfw
    3⤵
    - Executes dropped EXE
    - Checks SCSI registry key(s)
    - Suspicious behavior: MapViewOfSection
    PID:1220

C:\Windows\system32\taskeng.exe
taskeng.exe {1D9E910F-31B5-4A9D-8A99-6F5899CA82AF} S-1-5-21-2513283230-931923277-594887482-1000:MRBKYMNO\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1960
- C:\Users\Admin\AppData\Roaming\igsbjfw
  C:\Users\Admin\AppData\Roaming\igsbjfw
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:1476
- - C:\Users\Admin\AppData\Roaming\igsbjfw
    C:\Users\Admin\AppData\Roaming\igsbjfw
    3⤵
    - Executes dropped EXE
    - Checks SCSI registry key(s)
    - Suspicious behavior: MapViewOfSection
    PID:572

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\igsbjfw

MD5
06a029882deabf229f62728afe3baf4f

SHA1
33a5953fbcce8761af1e68df9c9f4ad153c4a536

SHA256
f24a559e79ba3121c7e0fed4ac995da056fe6a0dac71b2360f9e340b97117d05

SHA512
a81631eef6163f437e5bdf83156d26856653411dc6b9becc5580a83b9a4123faec5855d625beec15b1f71c3155624187f776f56b4f58e5f87e9f39bd8b61ba88

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

MD5
06a029882deabf229f62728afe3baf4f

SHA1
33a5953fbcce8761af1e68df9c9f4ad153c4a536

SHA256
f24a559e79ba3121c7e0fed4ac995da056fe6a0dac71b2360f9e340b97117d05

SHA512
a81631eef6163f437e5bdf83156d26856653411dc6b9becc5580a83b9a4123faec5855d625beec15b1f71c3155624187f776f56b4f58e5f87e9f39bd8b61ba88

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

MD5
06a029882deabf229f62728afe3baf4f

SHA1
33a5953fbcce8761af1e68df9c9f4ad153c4a536

SHA256
f24a559e79ba3121c7e0fed4ac995da056fe6a0dac71b2360f9e340b97117d05

SHA512
a81631eef6163f437e5bdf83156d26856653411dc6b9becc5580a83b9a4123faec5855d625beec15b1f71c3155624187f776f56b4f58e5f87e9f39bd8b61ba88

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

MD5
06a029882deabf229f62728afe3baf4f

SHA1
33a5953fbcce8761af1e68df9c9f4ad153c4a536

SHA256
f24a559e79ba3121c7e0fed4ac995da056fe6a0dac71b2360f9e340b97117d05

SHA512
a81631eef6163f437e5bdf83156d26856653411dc6b9becc5580a83b9a4123faec5855d625beec15b1f71c3155624187f776f56b4f58e5f87e9f39bd8b61ba88

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

MD5
06a029882deabf229f62728afe3baf4f

SHA1
33a5953fbcce8761af1e68df9c9f4ad153c4a536

SHA256
f24a559e79ba3121c7e0fed4ac995da056fe6a0dac71b2360f9e340b97117d05

SHA512
a81631eef6163f437e5bdf83156d26856653411dc6b9becc5580a83b9a4123faec5855d625beec15b1f71c3155624187f776f56b4f58e5f87e9f39bd8b61ba88

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

MD5
06a029882deabf229f62728afe3baf4f

SHA1
33a5953fbcce8761af1e68df9c9f4ad153c4a536

SHA256
f24a559e79ba3121c7e0fed4ac995da056fe6a0dac71b2360f9e340b97117d05

SHA512
a81631eef6163f437e5bdf83156d26856653411dc6b9becc5580a83b9a4123faec5855d625beec15b1f71c3155624187f776f56b4f58e5f87e9f39bd8b61ba88

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

MD5
06a029882deabf229f62728afe3baf4f

SHA1
33a5953fbcce8761af1e68df9c9f4ad153c4a536

SHA256
f24a559e79ba3121c7e0fed4ac995da056fe6a0dac71b2360f9e340b97117d05

SHA512
a81631eef6163f437e5bdf83156d26856653411dc6b9becc5580a83b9a4123faec5855d625beec15b1f71c3155624187f776f56b4f58e5f87e9f39bd8b61ba88

Download Submit
memory/432-69-0x0000000000402E1A-mapping.dmp

Download
memory/572-83-0x0000000000402E1A-mapping.dmp

Download
memory/1220-76-0x0000000000402E1A-mapping.dmp

Download
memory/1256-72-0x0000000002AA0000-0x0000000002AB6000-memory.dmp

Filesize
88KB

Download
memory/1256-64-0x0000000002210000-0x0000000002226000-memory.dmp

Filesize
88KB

Download
memory/1256-79-0x00000000038A0000-0x00000000038B6000-memory.dmp

Filesize
88KB

Download
memory/1256-86-0x0000000002B60000-0x0000000002B76000-memory.dmp

Filesize
88KB

Download
memory/1364-73-0x0000000000000000-mapping.dmp

Download
memory/1476-80-0x0000000000000000-mapping.dmp

Download
memory/1884-60-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/1884-62-0x00000000765F1000-0x00000000765F3000-memory.dmp

Filesize
8KB

Download
memory/1884-61-0x0000000000402E1A-mapping.dmp

Download
memory/1892-66-0x0000000000000000-mapping.dmp

Download
memory/2028-63-0x0000000000020000-0x000000000002A000-memory.dmp

Filesize
40KB

Download