xworm | ccc8b0785fbfe6d9e9aeb55db3d61eda595b21567c12a06a4c15f48b2923baa2

General

Target

ccc8b0785fbfe6d9e9aeb55db3d61eda595b21567c12a06a4c15f48b2923baa2.exe
Size

1.7MB
MD5

a378359637b5d95388debc25f568ce9f
SHA1

1d88e287db2b9bb659688d8b79e418d7504c3145
SHA256

ccc8b0785fbfe6d9e9aeb55db3d61eda595b21567c12a06a4c15f48b2923baa2
SHA512

b500368c49228ff68e5537bd6b743461d111e8eb2ca87020b86c2973a65163787db95dede3a4bbf9b6771159322a37f8112253a356d622a0ed9adfb7e1431fa1
SSDEEP

49152:1Djlabwz9Om4Yd3cY6nbdoQi5i1kpMWQQx8:Zqw/4wKoQpWW

Score

10^/10

xworm discovery rat trojan

Malware Config

Extracted

Family

xworm

C2

set-reduces.gl.at.ply.gg:28950

Attributes

Install_directory
%ProgramData%
install_file
svchost.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/3636-22-0x0000000000270000-0x00000000005F2000-memory.dmp	family_xworm
behavioral2/memory/3636-26-0x0000000000270000-0x00000000005F2000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

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-1-5-21-3181990009-820930284-137514597-1000\Control Panel\International\Geo\Nation	ccc8b0785fbfe6d9e9aeb55db3d61eda595b21567c12a06a4c15f48b2923baa2.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3181990009-820930284-137514597-1000\Control Panel\International\Geo\Nation	Bootstraper.exe

Executes dropped EXE 2 IoCs

pid	Process
3352	Bootstraper.exe
3636	BootstraperNew_protected.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
28	ip-api.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3636	BootstraperNew_protected.exe
3636	BootstraperNew_protected.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4772	3636	WerFault.exe	90

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BootstraperNew_protected.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3636	BootstraperNew_protected.exe
3636	BootstraperNew_protected.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3636	BootstraperNew_protected.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3636	BootstraperNew_protected.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1972 wrote to memory of 3352	1972	ccc8b0785fbfe6d9e9aeb55db3d61eda595b21567c12a06a4c15f48b2923baa2.exe	88
PID 1972 wrote to memory of 3352	1972	ccc8b0785fbfe6d9e9aeb55db3d61eda595b21567c12a06a4c15f48b2923baa2.exe	88
PID 3352 wrote to memory of 3636	3352	Bootstraper.exe	90
PID 3352 wrote to memory of 3636	3352	Bootstraper.exe	90
PID 3352 wrote to memory of 3636	3352	Bootstraper.exe	90

C:\Users\Admin\AppData\Local\Temp\ccc8b0785fbfe6d9e9aeb55db3d61eda595b21567c12a06a4c15f48b2923baa2.exe
"C:\Users\Admin\AppData\Local\Temp\ccc8b0785fbfe6d9e9aeb55db3d61eda595b21567c12a06a4c15f48b2923baa2.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1972
- C:\Users\Admin\AppData\Local\Temp\Windows\System32\Bootstraper.exe
  "C:\Users\Admin\AppData\Local\Temp\Windows\System32\Bootstraper.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:3352
- - C:\Users\Admin\AppData\Local\Temp\BootstraperNew_protected.exe
    "C:\Users\Admin\AppData\Local\Temp\BootstraperNew_protected.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:3636
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3636 -s 1832
      4⤵
      Program crash
      PID:4772

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 3636 -ip 3636
1⤵
PID:3428

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\BootstraperNew_protected.exe

Filesize
1.1MB

MD5
2a1de04ba5a824f8ac57894935bc6d27

SHA1
7cf6f2d735ba9f1a536fc8453f87e77d34c1a5be

SHA256
ba3b1c382e24ebd6d37d2c7734720c6aa764f562a25d7dcbc7e3a1595afaa1d4

SHA512
3c62fa6792b1480ac0f3c200628992425616873d70ffcf675952adb7e4d9f77d034087148d5e2cd45871ec12fb6825a751d70d2e58302ce4843ac9f0def24378

Download Submit
C:\Users\Admin\AppData\Local\Temp\Windows\System32\Bootstraper.exe

Filesize
1.5MB

MD5
3ae688a1356c87103f12f78f36d44c7d

SHA1
2e4d0a10a3b00f6effa14fba95a075bcaae217fb

SHA256
b2249f5105cc208e95d559ef92783eb1dc824fb6fca9a3596e6a0139161af502

SHA512
29e6790c775dfbf31fd9b347b70dad61a2693bfbfa9fda75cb71922e9fd8900f451deb3fb02241b2992c93b24f1d10eb65fdd7e4f6a49948f35cc349ca269fb1

Download Submit
memory/3636-21-0x0000000000270000-0x00000000005F2000-memory.dmp

Filesize
3.5MB

Download
memory/3636-22-0x0000000000270000-0x00000000005F2000-memory.dmp

Filesize
3.5MB

Download
memory/3636-23-0x00000000057B0000-0x000000000584C000-memory.dmp

Filesize
624KB

Download
memory/3636-24-0x0000000005850000-0x00000000058B6000-memory.dmp

Filesize
408KB

Download
memory/3636-26-0x0000000000270000-0x00000000005F2000-memory.dmp

Filesize
3.5MB

Download

Analysis

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