systembc | 06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77

Resubmissions

18/04/2024, 11:46

240418-nxbcraca3410

18/04/2024, 11:45

18/04/2024, 11:45

18/04/2024, 11:45

18/04/2024, 11:45

18/04/2024, 10:00

Analysis

max time kernel
1198s
max time network
1204s
platform
windows11-21h2_x64
resource
win11-20240412-en
resource tags

arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
submitted
18/04/2024, 11:45

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General

Target
06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe
Size 192KB
Sample240418-nw8a4adb71
SHA256 06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77
MD5 610b4e85369410c52cd2c1f1c1b304ae
SHA1 1a1288380b4abddb9830ff22541583ba66f76f2c
SHA512 46deda3922aff6aed04591aac09be1408798fc8e6d58ace5f9dca92ec33583b86ecf4b1fe52696f8128fd50cc27f14485cdc1bd51339788964d39f323d171c3a
SSDEEP 3072:rf1BDZ0kVB67Duw9AMc+bP1Yf0wK8F78CrLFOmvJfnah+vbkWS90tqNu/mOspgI:r9X0GgP1k0I84Loafnah+TJqNfppJ
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

systembc trojan

Malware Config

Extracted

Family

systembc

172.104.63.157:4001

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc

Executes dropped EXE 22 IoCs

pid	Process
3756	asfj.exe
2448	asfj.exe
3536	asfj.exe
864	asfj.exe
3104	asfj.exe
3316	asfj.exe
360	asfj.exe
4756	asfj.exe
3996	asfj.exe
3844	asfj.exe
3792	asfj.exe
3720	asfj.exe
508	asfj.exe
3560	asfj.exe
4664	asfj.exe
2112	asfj.exe
3080	asfj.exe
1580	asfj.exe
600	asfj.exe
4888	asfj.exe
2936	asfj.exe
2972	asfj.exe

Loads dropped DLL 12 IoCs

pid	Process
3880	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe
3756	asfj.exe
3536	asfj.exe
3104	asfj.exe
360	asfj.exe
3996	asfj.exe
3792	asfj.exe
508	asfj.exe
4664	asfj.exe
3080	asfj.exe
600	asfj.exe
2936	asfj.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
13	api.ipify.org
1	api.ipify.org

Uses Tor communications 1 TTPs
Malware can proxy its traffic through Tor for more anonymity.

Proxy
T1090

Drops file in System32 directory 11 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\528123	asfj.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\528123	asfj.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\528123	asfj.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\528123	asfj.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\528123	asfj.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\528123	asfj.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\528123	asfj.exe
File created	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\528123	asfj.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\528123	asfj.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\528123	asfj.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\528123	asfj.exe

Suspicious use of SetThreadContext 12 IoCs

description	pid	Process	procid_target
PID 3880 set thread context of 232	3880	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe	81
PID 3756 set thread context of 2448	3756	asfj.exe	83
PID 3536 set thread context of 864	3536	asfj.exe	86
PID 3104 set thread context of 3316	3104	asfj.exe	88
PID 360 set thread context of 4756	360	asfj.exe	90
PID 3996 set thread context of 3844	3996	asfj.exe	92
PID 3792 set thread context of 3720	3792	asfj.exe	94
PID 508 set thread context of 3560	508	asfj.exe	96
PID 4664 set thread context of 2112	4664	asfj.exe	98
PID 3080 set thread context of 1580	3080	asfj.exe	100
PID 600 set thread context of 4888	600	asfj.exe	102
PID 2936 set thread context of 2972	2936	asfj.exe	104

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\asfj.job	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe
File opened for modification	C:\Windows\Tasks\asfj.job	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

NSIS installer 2 IoCs

installer

resource	yara_rule
behavioral5/files/0x000200000002aa46-14.dat	nsis_installer_1
behavioral5/files/0x000200000002aa46-14.dat	nsis_installer_2

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
232	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe
232	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe

Suspicious behavior: MapViewOfSection 12 IoCs

pid	Process
3880	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe
3756	asfj.exe
3536	asfj.exe
3104	asfj.exe
360	asfj.exe
3996	asfj.exe
3792	asfj.exe
508	asfj.exe
4664	asfj.exe
3080	asfj.exe
600	asfj.exe
2936	asfj.exe

Suspicious use of WriteProcessMemory 48 IoCs

description	pid	Process	procid_target
PID 3880 wrote to memory of 232	3880	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe	81
PID 3880 wrote to memory of 232	3880	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe	81
PID 3880 wrote to memory of 232	3880	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe	81
PID 3880 wrote to memory of 232	3880	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe	81
PID 3756 wrote to memory of 2448	3756	asfj.exe	83
PID 3756 wrote to memory of 2448	3756	asfj.exe	83
PID 3756 wrote to memory of 2448	3756	asfj.exe	83
PID 3756 wrote to memory of 2448	3756	asfj.exe	83
PID 3536 wrote to memory of 864	3536	asfj.exe	86
PID 3536 wrote to memory of 864	3536	asfj.exe	86
PID 3536 wrote to memory of 864	3536	asfj.exe	86
PID 3536 wrote to memory of 864	3536	asfj.exe	86
PID 3104 wrote to memory of 3316	3104	asfj.exe	88
PID 3104 wrote to memory of 3316	3104	asfj.exe	88
PID 3104 wrote to memory of 3316	3104	asfj.exe	88
PID 3104 wrote to memory of 3316	3104	asfj.exe	88
PID 360 wrote to memory of 4756	360	asfj.exe	90
PID 360 wrote to memory of 4756	360	asfj.exe	90
PID 360 wrote to memory of 4756	360	asfj.exe	90
PID 360 wrote to memory of 4756	360	asfj.exe	90
PID 3996 wrote to memory of 3844	3996	asfj.exe	92
PID 3996 wrote to memory of 3844	3996	asfj.exe	92
PID 3996 wrote to memory of 3844	3996	asfj.exe	92
PID 3996 wrote to memory of 3844	3996	asfj.exe	92
PID 3792 wrote to memory of 3720	3792	asfj.exe	94
PID 3792 wrote to memory of 3720	3792	asfj.exe	94
PID 3792 wrote to memory of 3720	3792	asfj.exe	94
PID 3792 wrote to memory of 3720	3792	asfj.exe	94
PID 508 wrote to memory of 3560	508	asfj.exe	96
PID 508 wrote to memory of 3560	508	asfj.exe	96
PID 508 wrote to memory of 3560	508	asfj.exe	96
PID 508 wrote to memory of 3560	508	asfj.exe	96
PID 4664 wrote to memory of 2112	4664	asfj.exe	98
PID 4664 wrote to memory of 2112	4664	asfj.exe	98
PID 4664 wrote to memory of 2112	4664	asfj.exe	98
PID 4664 wrote to memory of 2112	4664	asfj.exe	98
PID 3080 wrote to memory of 1580	3080	asfj.exe	100
PID 3080 wrote to memory of 1580	3080	asfj.exe	100
PID 3080 wrote to memory of 1580	3080	asfj.exe	100
PID 3080 wrote to memory of 1580	3080	asfj.exe	100
PID 600 wrote to memory of 4888	600	asfj.exe	102
PID 600 wrote to memory of 4888	600	asfj.exe	102
PID 600 wrote to memory of 4888	600	asfj.exe	102
PID 600 wrote to memory of 4888	600	asfj.exe	102
PID 2936 wrote to memory of 2972	2936	asfj.exe	104
PID 2936 wrote to memory of 2972	2936	asfj.exe	104
PID 2936 wrote to memory of 2972	2936	asfj.exe	104
PID 2936 wrote to memory of 2972	2936	asfj.exe	104

C:\Users\Admin\AppData\Local\Temp\06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe
"C:\Users\Admin\AppData\Local\Temp\06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3880
- C:\Users\Admin\AppData\Local\Temp\06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe
  "C:\Users\Admin\AppData\Local\Temp\06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe"
  2⤵
  - Drops file in Windows directory
  - Suspicious behavior: EnumeratesProcesses
  PID:232

C:\ProgramData\rmoq\asfj.exe
C:\ProgramData\rmoq\asfj.exe start
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3756
- C:\ProgramData\rmoq\asfj.exe
  C:\ProgramData\rmoq\asfj.exe start
  2⤵
  - Executes dropped EXE
  PID:2448

C:\ProgramData\rmoq\asfj.exe
C:\ProgramData\rmoq\asfj.exe start
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3536
- C:\ProgramData\rmoq\asfj.exe
  C:\ProgramData\rmoq\asfj.exe start
  2⤵
  - Executes dropped EXE
  PID:864

C:\ProgramData\rmoq\asfj.exe
C:\ProgramData\rmoq\asfj.exe start
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3104
- C:\ProgramData\rmoq\asfj.exe
  C:\ProgramData\rmoq\asfj.exe start
  2⤵
  - Executes dropped EXE
  PID:3316

C:\ProgramData\rmoq\asfj.exe
C:\ProgramData\rmoq\asfj.exe start
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:360
- C:\ProgramData\rmoq\asfj.exe
  C:\ProgramData\rmoq\asfj.exe start
  2⤵
  - Executes dropped EXE
  PID:4756

C:\ProgramData\rmoq\asfj.exe
C:\ProgramData\rmoq\asfj.exe start
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3996
- C:\ProgramData\rmoq\asfj.exe
  C:\ProgramData\rmoq\asfj.exe start
  2⤵
  - Executes dropped EXE
  PID:3844

C:\ProgramData\rmoq\asfj.exe
C:\ProgramData\rmoq\asfj.exe start
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3792
- C:\ProgramData\rmoq\asfj.exe
  C:\ProgramData\rmoq\asfj.exe start
  2⤵
  - Executes dropped EXE
  PID:3720

C:\ProgramData\rmoq\asfj.exe
C:\ProgramData\rmoq\asfj.exe start
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:508
- C:\ProgramData\rmoq\asfj.exe
  C:\ProgramData\rmoq\asfj.exe start
  2⤵
  - Executes dropped EXE
  PID:3560

C:\ProgramData\rmoq\asfj.exe
C:\ProgramData\rmoq\asfj.exe start
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4664
- C:\ProgramData\rmoq\asfj.exe
  C:\ProgramData\rmoq\asfj.exe start
  2⤵
  - Executes dropped EXE
  PID:2112

C:\ProgramData\rmoq\asfj.exe
C:\ProgramData\rmoq\asfj.exe start
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3080
- C:\ProgramData\rmoq\asfj.exe
  C:\ProgramData\rmoq\asfj.exe start
  2⤵
  - Executes dropped EXE
  PID:1580

C:\ProgramData\rmoq\asfj.exe
C:\ProgramData\rmoq\asfj.exe start
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:600
- C:\ProgramData\rmoq\asfj.exe
  C:\ProgramData\rmoq\asfj.exe start
  2⤵
  - Executes dropped EXE
  PID:4888

C:\ProgramData\rmoq\asfj.exe
C:\ProgramData\rmoq\asfj.exe start
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2936
- C:\ProgramData\rmoq\asfj.exe
  C:\ProgramData\rmoq\asfj.exe start
  2⤵
  - Executes dropped EXE
  PID:2972

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Proxy

T1090

Exfiltration

Impact

Replay Monitor

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Downloads

asfj.exe

Path C:\ProgramData\rmoq\asfj.exe
Size 192KB
SHA256 06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77
MD5 610b4e85369410c52cd2c1f1c1b304ae
SHA1 1a1288380b4abddb9830ff22541583ba66f76f2c
SHA512 46deda3922aff6aed04591aac09be1408798fc8e6d58ace5f9dca92ec33583b86ecf4b1fe52696f8128fd50cc27f14485cdc1bd51339788964d39f323d171c3a
SSDEEP 3072:rf1BDZ0kVB67Duw9AMc+bP1Yf0wK8F78CrLFOmvJfnah+vbkWS90tqNu/mOspgI:r9X0GgP1k0I84Loafnah+TJqNfppJ
MD5 SHA1 SHA512 SSDEEP

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System.dll

Path C:\Users\Admin\AppData\Local\Temp\nsuAC1F.tmp\System.dll
Size 11KB
SHA256 6fcea34c8666b06368379c6c402b5321202c11b00889401c743fb96c516c679e
MD5 fccff8cb7a1067e23fd2e2b63971a8e1
SHA1 30e2a9e137c1223a78a0f7b0bf96a1c361976d91
SHA512 f4335e84e6f8d70e462a22f1c93d2998673a7616c868177cac3e8784a3be1d7d0bb96f2583fa0ed82f4f2b6b8f5d9b33521c279a42e055d80a94b4f3f1791e0c
SSDEEP 192:xPtkiQJr7V9r3HcU17S8g1w5xzWxy6j2V7i77blbTc4v:g7VpNo8gmOyRsVc4
MD5 SHA1 SHA512 SSDEEP

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528123

Path C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\528123
Size 79KB
SHA256 ad73fe27a27f6a9312bba56950898ef4bd23ba512b368a58b652e97f8346eb2b
MD5 ee40d796e288ef140dae1d135290d39f
SHA1 58b5efe9d6778d3b91b6fc238a03ef4df7053115
SHA512 f3a017bfb30c9112dee146e7396ecb918eb6f8159885b5d78d2e52c38dca1d83f9ab385fd24930ed78b721b2ae11f783b77ce05659cda508c03d59ea6b9a8e5c
SSDEEP 1536:NoJga8MhLf0YNyb8W478Cr7i+9FO5M5HsfP+kkJfkrKb:91Yf0wK8/78CrLFOmnJfnb
MD5 SHA1 SHA512 SSDEEP

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528123

Path C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\528123
Size 150KB
SHA256 cd2eb21478199118d1f113b8a5c36b3d3a7e19a4a7d963f48b8df14eba6ea10c
MD5 b76e1d1a677d5ab98d816c5fd5874e9e
SHA1 f7482d1b6b5e446f5d11848d40872f790ef671e3
SHA512 1ab74e04671abe7d685b6e7100a0a12b78cae00c3bd24c68f0ceebaf8924ee28bb582d4ef74bcd08c1f5e3a309e0468a845a630e118baf0f324a41c663d2a4be
SSDEEP 3072:91Yf0wK8/78CrLFOmnJfnah+vbF5jwl/qCkkMbVwgGcdvNu/mOA:91k0o84Logfnah+TF5jwXM6g3vNfP
MD5 SHA1 SHA512 SSDEEP

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memory/232-6-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/232-8-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/232-10-0x0000000000400000-0x000000000040B000-memory.dmp

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