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
1197s
max time network
1201s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-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 4 IoCs

pid	Process
3136	smebvhe.exe
4128	smebvhe.exe
4460	smebvhe.exe
3028	smebvhe.exe

Loads dropped DLL 3 IoCs

pid	Process
2488	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe
3136	smebvhe.exe
4460	smebvhe.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
4	api.ipify.org
5	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 2 IoCs

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

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2488 set thread context of 208	2488	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe	73
PID 3136 set thread context of 4128	3136	smebvhe.exe	75
PID 4460 set thread context of 3028	4460	smebvhe.exe	77

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\smebvhe.job	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe
File opened for modification	C:\Windows\Tasks\smebvhe.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
behavioral3/files/0x000700000001abbf-13.dat	nsis_installer_1
behavioral3/files/0x000700000001abbf-13.dat	nsis_installer_2

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
208	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe
208	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
2488	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe
3136	smebvhe.exe
4460	smebvhe.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2488 wrote to memory of 208	2488	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe	73
PID 2488 wrote to memory of 208	2488	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe	73
PID 2488 wrote to memory of 208	2488	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe	73
PID 2488 wrote to memory of 208	2488	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe	73
PID 3136 wrote to memory of 4128	3136	smebvhe.exe	75
PID 3136 wrote to memory of 4128	3136	smebvhe.exe	75
PID 3136 wrote to memory of 4128	3136	smebvhe.exe	75
PID 3136 wrote to memory of 4128	3136	smebvhe.exe	75
PID 4460 wrote to memory of 3028	4460	smebvhe.exe	77
PID 4460 wrote to memory of 3028	4460	smebvhe.exe	77
PID 4460 wrote to memory of 3028	4460	smebvhe.exe	77
PID 4460 wrote to memory of 3028	4460	smebvhe.exe	77

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:2488
- 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:208

C:\ProgramData\xnddiii\smebvhe.exe
C:\ProgramData\xnddiii\smebvhe.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:3136
- C:\ProgramData\xnddiii\smebvhe.exe
  C:\ProgramData\xnddiii\smebvhe.exe start
  2⤵
  - Executes dropped EXE
  PID:4128

C:\ProgramData\xnddiii\smebvhe.exe
C:\ProgramData\xnddiii\smebvhe.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:4460
- C:\ProgramData\xnddiii\smebvhe.exe
  C:\ProgramData\xnddiii\smebvhe.exe start
  2⤵
  - Executes dropped EXE
  PID:3028

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

smebvhe.exe

Path C:\ProgramData\xnddiii\smebvhe.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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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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System.dll

Path \Users\Admin\AppData\Local\Temp\nsyCD73.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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memory/208-6-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/208-8-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/208-21-0x0000000000400000-0x000000000040B000-memory.dmp

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