systembc | e5506d058204729a5126b16e5984840c681df000f034602cf2fba314f327f5f1

General

Target

cf1c390eeb26fbff647586a1a05e4fe11957af00a4098258e841e18a1d421f15.exe
Size

662KB
MD5

d031aae0c4b488067297beb2dc26460f
SHA1

7a2fa90c458468651846532d2876eefc7fe15ea2
SHA256

cf1c390eeb26fbff647586a1a05e4fe11957af00a4098258e841e18a1d421f15
SHA512

4c7538977edf03602b9b4c29acf4e428850a46cfd9bb448dbc39277d75b4536977baa3c0f370ec2065a837af49d049be14a0fd936b06955dcfb352d6ce3ab3d0
SSDEEP

12288:GubsNSOetfARQAPyGUu7zhubsNSOetfARQAPyGUfT+tkrnC/bv8:GubsnafAPyjSzhubsnafAPyjZrnEL8

Score

10^/10

systembc trojan

Malware Config

Extracted

Family

systembc

C2

cobusabobus.cam:4001

Signatures

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

Executes dropped EXE 4 IoCs

pid	Process
2564	work.exe
2456	pgdrad.exe
2424	uqia.exe
2692	uqia.exe

Loads dropped DLL 5 IoCs

pid	Process
1668	cmd.exe
2564	work.exe
2564	work.exe
2564	work.exe
2564	work.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\uqia.job	pgdrad.exe
File opened for modification	C:\Windows\Tasks\uqia.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 1 IoCs

pid	Process
2456	pgdrad.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1656 wrote to memory of 1668	1656	cf1c390eeb26fbff647586a1a05e4fe11957af00a4098258e841e18a1d421f15.exe	28
PID 1656 wrote to memory of 1668	1656	cf1c390eeb26fbff647586a1a05e4fe11957af00a4098258e841e18a1d421f15.exe	28
PID 1656 wrote to memory of 1668	1656	cf1c390eeb26fbff647586a1a05e4fe11957af00a4098258e841e18a1d421f15.exe	28
PID 1656 wrote to memory of 1668	1656	cf1c390eeb26fbff647586a1a05e4fe11957af00a4098258e841e18a1d421f15.exe	28
PID 1668 wrote to memory of 2564	1668	cmd.exe	30
PID 1668 wrote to memory of 2564	1668	cmd.exe	30
PID 1668 wrote to memory of 2564	1668	cmd.exe	30
PID 1668 wrote to memory of 2564	1668	cmd.exe	30
PID 2564 wrote to memory of 2456	2564	work.exe	31
PID 2564 wrote to memory of 2456	2564	work.exe	31
PID 2564 wrote to memory of 2456	2564	work.exe	31
PID 2564 wrote to memory of 2456	2564	work.exe	31
PID 2408 wrote to memory of 2424	2408	taskeng.exe	33
PID 2408 wrote to memory of 2424	2408	taskeng.exe	33
PID 2408 wrote to memory of 2424	2408	taskeng.exe	33
PID 2408 wrote to memory of 2424	2408	taskeng.exe	33
PID 2408 wrote to memory of 2692	2408	taskeng.exe	36
PID 2408 wrote to memory of 2692	2408	taskeng.exe	36
PID 2408 wrote to memory of 2692	2408	taskeng.exe	36
PID 2408 wrote to memory of 2692	2408	taskeng.exe	36

C:\Users\Admin\AppData\Local\Temp\cf1c390eeb26fbff647586a1a05e4fe11957af00a4098258e841e18a1d421f15.exe
"C:\Users\Admin\AppData\Local\Temp\cf1c390eeb26fbff647586a1a05e4fe11957af00a4098258e841e18a1d421f15.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1656
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\RarSFX0\1.bat" "
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1668
- - C:\Users\Admin\AppData\Local\Temp\RarSFX0\work.exe
    work.exe -priverdD
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:2564
  - - 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:2456

C:\Windows\system32\taskeng.exe
taskeng.exe {E7F2E39D-F454-4BEE-AA4E-92D404199092} S-1-5-21-2248906074-2862704502-246302768-1000:GHPZRGFC\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2408
- C:\ProgramData\bclteu\uqia.exe
  C:\ProgramData\bclteu\uqia.exe start2
  2⤵
  - Executes dropped EXE
  PID:2424
- C:\ProgramData\bclteu\uqia.exe
  C:\ProgramData\bclteu\uqia.exe start2
  2⤵
  - Executes dropped EXE
  PID:2692

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\RarSFX0\1.bat

Filesize
35B

MD5
ff59d999beb970447667695ce3273f75

SHA1
316fa09f467ba90ac34a054daf2e92e6e2854ff8

SHA256
065d2b17ad499587dc9de7ee9ecda4938b45da1df388bc72e6627dff220f64d2

SHA512
d5ac72cb065a3cd3cb118a69a2f356314eeed24dcb4880751e1a3683895e66cedc62607967e29f77a0c27adf1c9fe0efd86e804f693f0a63a5b51b0bf0056b5d

Download Submit
\Users\Admin\AppData\Local\Temp\RarSFX0\work.exe

Filesize
335KB

MD5
2f87330674e2681d5e8dfb1bc792fca7

SHA1
d84b9e206c7c403f13054a2e7f959d184426da72

SHA256
b6fd1fdecdf771cf1bb62bb80fa412bb06602143ac81af349ba3b18a46fd05b9

SHA512
156403f26617380bc0f3a710411d626e14a386922495832d5cb3eeb17fa558da4217bcf5e6a253d6b12ea86bf83648d1a8c7824fcf1e4a6036a6ed21e7f35bf1

Download Submit
\Users\Admin\AppData\Local\Temp\RarSFX1\pgdrad.exe

Filesize
16KB

MD5
4f01c3d7439dde153ff0110a26e2a71c

SHA1
40d7203ad4e1fd40e13a56e6f747ee480740873c

SHA256
cfb1fd0adf528fcf14647cf3fcd85fb7e4fddd2167b36f9e8b2424b62453df28

SHA512
513d09b80e1ac80813bc691e71cdf5348478157350e43b9daed27741b7f5a7a16b2ae4d88ee9951395747c7f2a93ff0c1f2c3753a9e3bad2e2607767a1e3d28e

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Analysis

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