xworm | 20907e4fec14e561984b67cde5cb2b6d75a26ad02ffaa46f9ae0e23a678f6c86

General

Target

fix solve.exe
Size

59KB
MD5

673ce5105eb2c4838bdc2e43142d7e86
SHA1

8131bfe7235e112bc9a4178e656bfbff765748f3
SHA256

20907e4fec14e561984b67cde5cb2b6d75a26ad02ffaa46f9ae0e23a678f6c86
SHA512

2981be70bab43262fbc7ac62bfa880822179a9be14a9c9d0c2c9aff61650ce671d5aad9280e9cbadb1d9d509a24d32f4b97a3b2cc1f4eac3b90718208ff551a9
SSDEEP

1536:XN/QzTH6/AUaeNmHhKcSc99bleVh83w46EOg7635m:XpMoAU9IHhKcSw9blAhOw+Og7om

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

C2

america-depending.gl.at.ply.gg:22525

Attributes

Install_directory
%AppData%
install_file
fix solve.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/1400-1-0x00000000007E0000-0x00000000007F6000-memory.dmp	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
4164	powershell.exe
3288	powershell.exe
208	powershell.exe
4624	powershell.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	fix solve.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fix solve.lnk	fix solve.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fix solve.lnk	fix solve.exe

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

System Information Discovery
T1082

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1400	fix solve.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
208	powershell.exe
208	powershell.exe
4624	powershell.exe
4624	powershell.exe
4164	powershell.exe
4164	powershell.exe
3288	powershell.exe
3288	powershell.exe
1400	fix solve.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1400	fix solve.exe
Token: SeDebugPrivilege	208	powershell.exe
Token: SeDebugPrivilege	4624	powershell.exe
Token: SeDebugPrivilege	4164	powershell.exe
Token: SeDebugPrivilege	3288	powershell.exe
Token: SeDebugPrivilege	1400	fix solve.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1400	fix solve.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1400 wrote to memory of 208	1400	fix solve.exe	84
PID 1400 wrote to memory of 208	1400	fix solve.exe	84
PID 1400 wrote to memory of 4624	1400	fix solve.exe	86
PID 1400 wrote to memory of 4624	1400	fix solve.exe	86
PID 1400 wrote to memory of 4164	1400	fix solve.exe	88
PID 1400 wrote to memory of 4164	1400	fix solve.exe	88
PID 1400 wrote to memory of 3288	1400	fix solve.exe	90
PID 1400 wrote to memory of 3288	1400	fix solve.exe	90

C:\Users\Admin\AppData\Local\Temp\fix solve.exe
"C:\Users\Admin\AppData\Local\Temp\fix solve.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1400
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\fix solve.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:208
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'fix solve.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4624
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\fix solve.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4164
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'fix solve.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3288

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
2ea91e7d1b473f8290ae52d13e105194

SHA1
5e565d99a7733250427e70f5f6e1951a081deed6

SHA256
712db2b991a3c11ccd71b36cfe99fad0b5b1eb1026b12d28c35a43334128671a

SHA512
0d6e2f0f8963986cb27a5cb853c5a87af5d2b65142ff082b4a12681b467d4a72efbcaea71307513523915aa4f27e7b238c67f4ab563f69525938f38253599424

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
fd98baf5a9c30d41317663898985593b

SHA1
ea300b99f723d2429d75a6c40e0838bf60f17aad

SHA256
9d97a5bbc88fdcceac25f293383f7e5ce242675460ffbfb2ee9090870c034e96

SHA512
bf4dbbd671b5d7afb326622a7c781f150860294d3dba7160330046c258c84a15981c70e50d84dc7faaa7cc8b8c90bf8df818b3f2d3806a8a3671dfe5e38fe7b0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_n5fdwt3f.r43.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/208-13-0x00007FFFA2C70000-0x00007FFFA3731000-memory.dmp

Filesize
10.8MB

Download
memory/208-14-0x00007FFFA2C70000-0x00007FFFA3731000-memory.dmp

Filesize
10.8MB

Download
memory/208-17-0x00007FFFA2C70000-0x00007FFFA3731000-memory.dmp

Filesize
10.8MB

Download
memory/208-12-0x00007FFFA2C70000-0x00007FFFA3731000-memory.dmp

Filesize
10.8MB

Download
memory/208-7-0x0000021EADDE0000-0x0000021EADE02000-memory.dmp

Filesize
136KB

Download
memory/1400-0-0x00007FFFA2C73000-0x00007FFFA2C75000-memory.dmp

Filesize
8KB

Download
memory/1400-1-0x00000000007E0000-0x00000000007F6000-memory.dmp

Filesize
88KB

Download
memory/1400-56-0x00007FFFA2C73000-0x00007FFFA2C75000-memory.dmp

Filesize
8KB

Download
memory/1400-57-0x00007FFFA2C70000-0x00007FFFA3731000-memory.dmp

Filesize
10.8MB

Download
memory/1400-58-0x00007FFFA2C70000-0x00007FFFA3731000-memory.dmp

Filesize
10.8MB

Download

Analysis

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