systembc | 42a191ee4f9593db8f514cce85ad8b9d6533bc71983a9529e7a5d68764d21679

Resubmissions

15/04/2024, 11:31

240415-nmzycsff4y10

10/04/2024, 04:57

10/04/2024, 04:57

10/04/2024, 04:57

10/04/2024, 04:57

19/12/2023, 13:06

Analysis

max time kernel
1800s
max time network
1805s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
10/04/2024, 04:57

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General

Target
2d3ba7dd14b9a579b2626fa5baee19bd.exe
Size 209KB
Sample240410-flcsfadc82
SHA256 42a191ee4f9593db8f514cce85ad8b9d6533bc71983a9529e7a5d68764d21679
MD5 2d3ba7dd14b9a579b2626fa5baee19bd
SHA1 dd365103583cfb3c10b73efc6592f8b80c1d75e0
SHA512 29efd1035df73572efea0d96017772481b9858855c12d1bb96fc6a4ccd49443a4bb0d1bd86c69dda4218f04e8855ec37c4515157b75a240a530792232c4f03c0
SSDEEP 6144:YDnLgI91y1UkT57iJz/DpURWPSvHuUiYphu1UY:cnLh9yn52rpUR5vHuRYpM+Y
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

systembc trojan upx

Malware Config

Extracted

Family

systembc

yan0212.com:4039
yan0212.net:4039

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
4604	lcalvsh.exe

UPX packed file 1 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral3/files/0x0004000000022ea3-7.dat	upx

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
20	api.ipify.org
21	api.ipify.org

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

Proxy
T1090

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\lcalvsh.job	2d3ba7dd14b9a579b2626fa5baee19bd.exe
File opened for modification	C:\Windows\Tasks\lcalvsh.job	2d3ba7dd14b9a579b2626fa5baee19bd.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4900	4512	WerFault.exe	92

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4512	2d3ba7dd14b9a579b2626fa5baee19bd.exe
4512	2d3ba7dd14b9a579b2626fa5baee19bd.exe

C:\Users\Admin\AppData\Local\Temp\2d3ba7dd14b9a579b2626fa5baee19bd.exe
"C:\Users\Admin\AppData\Local\Temp\2d3ba7dd14b9a579b2626fa5baee19bd.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:4512
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4512 -s 936
  2⤵
  - Program crash
  PID:4900

C:\ProgramData\vmqtejt\lcalvsh.exe
C:\ProgramData\vmqtejt\lcalvsh.exe start
1⤵
- Executes dropped EXE
PID:4604

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=4092 --field-trial-handle=2276,i,11674642242468042059,14711253743544118298,262144 --variations-seed-version /prefetch:8
1⤵
PID:1964

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4512 -ip 4512
1⤵
PID:2468

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=3988 --field-trial-handle=2276,i,11674642242468042059,14711253743544118298,262144 --variations-seed-version /prefetch:8
1⤵
PID:2600

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Proxy

T1090

Exfiltration

Impact

Replay Monitor

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Downloads

lcalvsh.exe

Path C:\ProgramData\vmqtejt\lcalvsh.exe
Size 209KB
SHA256 42a191ee4f9593db8f514cce85ad8b9d6533bc71983a9529e7a5d68764d21679
MD5 2d3ba7dd14b9a579b2626fa5baee19bd
SHA1 dd365103583cfb3c10b73efc6592f8b80c1d75e0
SHA512 29efd1035df73572efea0d96017772481b9858855c12d1bb96fc6a4ccd49443a4bb0d1bd86c69dda4218f04e8855ec37c4515157b75a240a530792232c4f03c0
SSDEEP 6144:YDnLgI91y1UkT57iJz/DpURWPSvHuUiYphu1UY:cnLh9yn52rpUR5vHuRYpM+Y
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/4512-1-0x0000000004600000-0x0000000004700000-memory.dmp

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memory/4512-2-0x00000000001C0000-0x00000000001C9000-memory.dmp

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memory/4512-3-0x0000000000400000-0x00000000045F0000-memory.dmp

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memory/4512-12-0x0000000004600000-0x0000000004700000-memory.dmp

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memory/4512-13-0x00000000001C0000-0x00000000001C9000-memory.dmp

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memory/4512-25-0x0000000000400000-0x00000000045F0000-memory.dmp

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memory/4604-10-0x0000000004680000-0x0000000004780000-memory.dmp

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memory/4604-14-0x0000000000400000-0x00000000045F0000-memory.dmp

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memory/4604-18-0x0000000004680000-0x0000000004780000-memory.dmp

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