systembc | cf1c390eeb26fbff647586a1a05e4fe11957af00a4098258e841e18a1d421f15

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
17/05/2024, 10:43

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
cf1c390eeb26fbff647586a1a05e4fe11957af00a4098258e841e18a1d421f15.exe
Size 662KB
Sample240517-msfagaee36
SHA256 cf1c390eeb26fbff647586a1a05e4fe11957af00a4098258e841e18a1d421f15
MD5 d031aae0c4b488067297beb2dc26460f
SHA1 7a2fa90c458468651846532d2876eefc7fe15ea2
SHA512 4c7538977edf03602b9b4c29acf4e428850a46cfd9bb448dbc39277d75b4536977baa3c0f370ec2065a837af49d049be14a0fd936b06955dcfb352d6ce3ab3d0
SSDEEP 12288:GubsNSOetfARQAPyGUu7zhubsNSOetfARQAPyGUfT+tkrnC/bv8:GubsnafAPyjSzhubsnafAPyjZrnEL8
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

systembc trojan

Malware Config

Signatures

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

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	cf1c390eeb26fbff647586a1a05e4fe11957af00a4098258e841e18a1d421f15.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	work.exe

Executes dropped EXE 4 IoCs

pid	Process
4552	work.exe
3440	pgdrad.exe
4820	nvrsma.exe
4512	nvrsma.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\nvrsma.job	pgdrad.exe
File opened for modification	C:\Windows\Tasks\nvrsma.job	pgdrad.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3440	pgdrad.exe
3440	pgdrad.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1900 wrote to memory of 1148	1900	cf1c390eeb26fbff647586a1a05e4fe11957af00a4098258e841e18a1d421f15.exe	84
PID 1900 wrote to memory of 1148	1900	cf1c390eeb26fbff647586a1a05e4fe11957af00a4098258e841e18a1d421f15.exe	84
PID 1900 wrote to memory of 1148	1900	cf1c390eeb26fbff647586a1a05e4fe11957af00a4098258e841e18a1d421f15.exe	84
PID 1148 wrote to memory of 4552	1148	cmd.exe	87
PID 1148 wrote to memory of 4552	1148	cmd.exe	87
PID 1148 wrote to memory of 4552	1148	cmd.exe	87
PID 4552 wrote to memory of 3440	4552	work.exe	89
PID 4552 wrote to memory of 3440	4552	work.exe	89
PID 4552 wrote to memory of 3440	4552	work.exe	89

C:\Users\Admin\AppData\Local\Temp\cf1c390eeb26fbff647586a1a05e4fe11957af00a4098258e841e18a1d421f15.exe
"C:\Users\Admin\AppData\Local\Temp\cf1c390eeb26fbff647586a1a05e4fe11957af00a4098258e841e18a1d421f15.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1900
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\RarSFX0\1.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1148
- - C:\Users\Admin\AppData\Local\Temp\RarSFX0\work.exe
    work.exe -priverdD
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:4552
  - - C:\Users\Admin\AppData\Local\Temp\RarSFX1\pgdrad.exe
      "C:\Users\Admin\AppData\Local\Temp\RarSFX1\pgdrad.exe"
      4⤵
      Executes dropped EXE
      Drops file in Windows directory
      Suspicious behavior: EnumeratesProcesses
      PID:3440

C:\ProgramData\thths\nvrsma.exe
C:\ProgramData\thths\nvrsma.exe start2
1⤵
- Executes dropped EXE
PID:4820

C:\ProgramData\thths\nvrsma.exe
C:\ProgramData\thths\nvrsma.exe start2
1⤵
- Executes dropped EXE
PID:4512

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

1.bat

Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\1.bat
Size 35B
SHA256 065d2b17ad499587dc9de7ee9ecda4938b45da1df388bc72e6627dff220f64d2
MD5 ff59d999beb970447667695ce3273f75
SHA1 316fa09f467ba90ac34a054daf2e92e6e2854ff8
SHA512 d5ac72cb065a3cd3cb118a69a2f356314eeed24dcb4880751e1a3683895e66cedc62607967e29f77a0c27adf1c9fe0efd86e804f693f0a63a5b51b0bf0056b5d
MD5 SHA1 SHA512

Submit Download

work.exe

Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\work.exe
Size 335KB
SHA256 b6fd1fdecdf771cf1bb62bb80fa412bb06602143ac81af349ba3b18a46fd05b9
MD5 2f87330674e2681d5e8dfb1bc792fca7
SHA1 d84b9e206c7c403f13054a2e7f959d184426da72
SHA512 156403f26617380bc0f3a710411d626e14a386922495832d5cb3eeb17fa558da4217bcf5e6a253d6b12ea86bf83648d1a8c7824fcf1e4a6036a6ed21e7f35bf1
SSDEEP 6144:PiubWrNSOetO6cprlQAOWizGLIoSdRT+tkrnC/bvC:qubsNSOetfARQAPyGUfT+tkrnC/bvC
MD5 SHA1 SHA512 SSDEEP

Submit Download

pgdrad.exe

Path C:\Users\Admin\AppData\Local\Temp\RarSFX1\pgdrad.exe
Size 16KB
SHA256 cfb1fd0adf528fcf14647cf3fcd85fb7e4fddd2167b36f9e8b2424b62453df28
MD5 4f01c3d7439dde153ff0110a26e2a71c
SHA1 40d7203ad4e1fd40e13a56e6f747ee480740873c
SHA512 513d09b80e1ac80813bc691e71cdf5348478157350e43b9daed27741b7f5a7a16b2ae4d88ee9951395747c7f2a93ff0c1f2c3753a9e3bad2e2607767a1e3d28e
SSDEEP 384:rC+AHNZw/WnlrobdglGbLMoy+yG+yir1dV:r0gklrydgQP1yO67V
MD5 SHA1 SHA512 SSDEEP

Submit Download