systembc | 06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77

Resubmissions

18-04-2024 11:46

240418-nxbcraca34 10

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
602s
max time network
605s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
18-04-2024 11:45

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General

Target

06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe
Size

192KB
MD5

610b4e85369410c52cd2c1f1c1b304ae
SHA1

1a1288380b4abddb9830ff22541583ba66f76f2c
SHA256

06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77
SHA512

46deda3922aff6aed04591aac09be1408798fc8e6d58ace5f9dca92ec33583b86ecf4b1fe52696f8128fd50cc27f14485cdc1bd51339788964d39f323d171c3a
SSDEEP

3072:rf1BDZ0kVB67Duw9AMc+bP1Yf0wK8F78CrLFOmvJfnah+vbkWS90tqNu/mOspgI:r9X0GgP1k0I84Loafnah+TJqNfppJ

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 12 IoCs

pid	Process
2404	crxsob.exe
1084	crxsob.exe
1256	crxsob.exe
5004	crxsob.exe
4228	crxsob.exe
4348	crxsob.exe
3868	crxsob.exe
4284	crxsob.exe
1324	crxsob.exe
3116	crxsob.exe
4912	crxsob.exe
3408	crxsob.exe

Loads dropped DLL 7 IoCs

pid	Process
1108	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe
2404	crxsob.exe
1256	crxsob.exe
4228	crxsob.exe
3868	crxsob.exe
1324	crxsob.exe
4912	crxsob.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
44	api.ipify.org
45	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 6 IoCs

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

Suspicious use of SetThreadContext 7 IoCs

description	pid	Process	procid_target
PID 1108 set thread context of 3564	1108	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe	95
PID 2404 set thread context of 1084	2404	crxsob.exe	101
PID 1256 set thread context of 5004	1256	crxsob.exe	104
PID 4228 set thread context of 4348	4228	crxsob.exe	106
PID 3868 set thread context of 4284	3868	crxsob.exe	108
PID 1324 set thread context of 3116	1324	crxsob.exe	110
PID 4912 set thread context of 3408	4912	crxsob.exe	113

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\crxsob.job	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe
File opened for modification	C:\Windows\Tasks\crxsob.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
behavioral4/files/0x0007000000023274-13.dat	nsis_installer_1
behavioral4/files/0x0007000000023274-13.dat	nsis_installer_2

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3564	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe
3564	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
1108	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe
2404	crxsob.exe
1256	crxsob.exe
4228	crxsob.exe
3868	crxsob.exe
1324	crxsob.exe
4912	crxsob.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 1108 wrote to memory of 3564	1108	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe	95
PID 1108 wrote to memory of 3564	1108	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe	95
PID 1108 wrote to memory of 3564	1108	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe	95
PID 1108 wrote to memory of 3564	1108	06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77.exe	95
PID 2404 wrote to memory of 1084	2404	crxsob.exe	101
PID 2404 wrote to memory of 1084	2404	crxsob.exe	101
PID 2404 wrote to memory of 1084	2404	crxsob.exe	101
PID 2404 wrote to memory of 1084	2404	crxsob.exe	101
PID 1256 wrote to memory of 5004	1256	crxsob.exe	104
PID 1256 wrote to memory of 5004	1256	crxsob.exe	104
PID 1256 wrote to memory of 5004	1256	crxsob.exe	104
PID 1256 wrote to memory of 5004	1256	crxsob.exe	104
PID 4228 wrote to memory of 4348	4228	crxsob.exe	106
PID 4228 wrote to memory of 4348	4228	crxsob.exe	106
PID 4228 wrote to memory of 4348	4228	crxsob.exe	106
PID 4228 wrote to memory of 4348	4228	crxsob.exe	106
PID 3868 wrote to memory of 4284	3868	crxsob.exe	108
PID 3868 wrote to memory of 4284	3868	crxsob.exe	108
PID 3868 wrote to memory of 4284	3868	crxsob.exe	108
PID 3868 wrote to memory of 4284	3868	crxsob.exe	108
PID 1324 wrote to memory of 3116	1324	crxsob.exe	110
PID 1324 wrote to memory of 3116	1324	crxsob.exe	110
PID 1324 wrote to memory of 3116	1324	crxsob.exe	110
PID 1324 wrote to memory of 3116	1324	crxsob.exe	110
PID 4912 wrote to memory of 3408	4912	crxsob.exe	113
PID 4912 wrote to memory of 3408	4912	crxsob.exe	113
PID 4912 wrote to memory of 3408	4912	crxsob.exe	113
PID 4912 wrote to memory of 3408	4912	crxsob.exe	113

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:1108
- 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:3564

C:\ProgramData\bpmh\crxsob.exe
C:\ProgramData\bpmh\crxsob.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:2404
- C:\ProgramData\bpmh\crxsob.exe
  C:\ProgramData\bpmh\crxsob.exe start
  2⤵
  - Executes dropped EXE
  PID:1084

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3996 --field-trial-handle=3084,i,4016110471176367543,14287608422419064331,262144 --variations-seed-version /prefetch:8
1⤵
PID:884

C:\ProgramData\bpmh\crxsob.exe
C:\ProgramData\bpmh\crxsob.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:1256
- C:\ProgramData\bpmh\crxsob.exe
  C:\ProgramData\bpmh\crxsob.exe start
  2⤵
  - Executes dropped EXE
  PID:5004

C:\ProgramData\bpmh\crxsob.exe
C:\ProgramData\bpmh\crxsob.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:4228
- C:\ProgramData\bpmh\crxsob.exe
  C:\ProgramData\bpmh\crxsob.exe start
  2⤵
  - Executes dropped EXE
  PID:4348

C:\ProgramData\bpmh\crxsob.exe
C:\ProgramData\bpmh\crxsob.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:3868
- C:\ProgramData\bpmh\crxsob.exe
  C:\ProgramData\bpmh\crxsob.exe start
  2⤵
  - Executes dropped EXE
  PID:4284

C:\ProgramData\bpmh\crxsob.exe
C:\ProgramData\bpmh\crxsob.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:1324
- C:\ProgramData\bpmh\crxsob.exe
  C:\ProgramData\bpmh\crxsob.exe start
  2⤵
  - Executes dropped EXE
  PID:3116

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4136 --field-trial-handle=3084,i,4016110471176367543,14287608422419064331,262144 --variations-seed-version /prefetch:8
1⤵
PID:2904

C:\ProgramData\bpmh\crxsob.exe
C:\ProgramData\bpmh\crxsob.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:4912
- C:\ProgramData\bpmh\crxsob.exe
  C:\ProgramData\bpmh\crxsob.exe start
  2⤵
  - Executes dropped EXE
  PID:3408

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

C:\ProgramData\bpmh\crxsob.exe

Filesize
192KB

MD5
610b4e85369410c52cd2c1f1c1b304ae

SHA1
1a1288380b4abddb9830ff22541583ba66f76f2c

SHA256
06063b690db71cc96cc36b528e7a8fa599046491f976e94615392975b96b0d77

SHA512
46deda3922aff6aed04591aac09be1408798fc8e6d58ace5f9dca92ec33583b86ecf4b1fe52696f8128fd50cc27f14485cdc1bd51339788964d39f323d171c3a

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsp1D0A.tmp\System.dll

Filesize
11KB

MD5
fccff8cb7a1067e23fd2e2b63971a8e1

SHA1
30e2a9e137c1223a78a0f7b0bf96a1c361976d91

SHA256
6fcea34c8666b06368379c6c402b5321202c11b00889401c743fb96c516c679e

SHA512
f4335e84e6f8d70e462a22f1c93d2998673a7616c868177cac3e8784a3be1d7d0bb96f2583fa0ed82f4f2b6b8f5d9b33521c279a42e055d80a94b4f3f1791e0c

Download Submit
C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\528123

Filesize
150KB

MD5
b76e1d1a677d5ab98d816c5fd5874e9e

SHA1
f7482d1b6b5e446f5d11848d40872f790ef671e3

SHA256
cd2eb21478199118d1f113b8a5c36b3d3a7e19a4a7d963f48b8df14eba6ea10c

SHA512
1ab74e04671abe7d685b6e7100a0a12b78cae00c3bd24c68f0ceebaf8924ee28bb582d4ef74bcd08c1f5e3a309e0468a845a630e118baf0f324a41c663d2a4be

Download Submit
memory/3564-6-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3564-8-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3564-21-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download