xworm | 198f82a2b491cb5c769d25c03ea7908161e20a9b51b585099f7088cef5c4323e

General

Target

XwormV5.6.exe
Size

15.0MB
MD5

2ff4c5a7eff1d9f19e23156dceeca4d0
SHA1

d8c175bb2b968713d48b37e1d018c8736a34ea6d
SHA256

198f82a2b491cb5c769d25c03ea7908161e20a9b51b585099f7088cef5c4323e
SHA512

2c839576c2a9ce47b4d37325417a4055e4f8674323b6b1a558fac35628eaf32e354271936ceb8dc6a38ccc24b170cc17c08e74a994e8363831b410810d676a05
SSDEEP

3072:LJKhDbtkb2D7wyOQnxZd+xYoPdLa5a47Qnx5RUUOMlv1s8W:LJKhDSbFGExYoPJatsjtlv1s8

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

C2

193.161.193.99:63603

37.4.250.173:63603

Attributes

Install_directory
%AppData%
install_file
XwormV6.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/3996-1-0x0000000000CF0000-0x0000000000D14000-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
3100	powershell.exe
1612	powershell.exe
1028	powershell.exe
3980	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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	XwormV5.6.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XwormV6.lnk	XwormV5.6.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XwormV6.lnk	XwormV5.6.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3100	powershell.exe
3100	powershell.exe
1612	powershell.exe
1612	powershell.exe
1028	powershell.exe
1028	powershell.exe
3980	powershell.exe
3980	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	3996	XwormV5.6.exe
Token: SeDebugPrivilege	3100	powershell.exe
Token: SeDebugPrivilege	1612	powershell.exe
Token: SeDebugPrivilege	1028	powershell.exe
Token: SeDebugPrivilege	3980	powershell.exe
Token: SeDebugPrivilege	3996	XwormV5.6.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3996 wrote to memory of 3100	3996	XwormV5.6.exe	89
PID 3996 wrote to memory of 3100	3996	XwormV5.6.exe	89
PID 3996 wrote to memory of 1612	3996	XwormV5.6.exe	92
PID 3996 wrote to memory of 1612	3996	XwormV5.6.exe	92
PID 3996 wrote to memory of 1028	3996	XwormV5.6.exe	95
PID 3996 wrote to memory of 1028	3996	XwormV5.6.exe	95
PID 3996 wrote to memory of 3980	3996	XwormV5.6.exe	97
PID 3996 wrote to memory of 3980	3996	XwormV5.6.exe	97

C:\Users\Admin\AppData\Local\Temp\XwormV5.6.exe
"C:\Users\Admin\AppData\Local\Temp\XwormV5.6.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3996
- 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\XwormV5.6.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3100
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XwormV5.6.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1612
- 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\XwormV6.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1028
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XwormV6.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3980

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
62623d22bd9e037191765d5083ce16a3

SHA1
4a07da6872672f715a4780513d95ed8ddeefd259

SHA256
95d79fd575bbd21540e378fcbc1cd00d16f51af62ce15bae7080bb72c24e2010

SHA512
9a448b7a0d867466c2ea04ab84d2a9485d5fd20ab53b2b854f491831ee3f1d781b94d2635f7b0b35cb9f2d373cd52c67570879a56a42ed66bc9db06962ed4992

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

Filesize
944B

MD5
af86c421e1710d6edec3667d3c235f9a

SHA1
8457a14f6894c4d80597101a228e637f761f440e

SHA256
ac56dd276d368076ac4ddbdc63a7a20eac0d03f2acdaff2bff99eb248a95ccb7

SHA512
626daaaa888f4ebbe922e0f3ec39fd4315346ad77a9fcbca9a88dec611f9ad905e233823b14432623244c0d54b772f80622d38c8f02cf7d2cf4f7df6418e76be

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

Filesize
944B

MD5
15dde0683cd1ca19785d7262f554ba93

SHA1
d039c577e438546d10ac64837b05da480d06bf69

SHA256
d6fa39eab7ee36f44dc3f9f2839d098433db95c1eba924e4bcf4e5c0d268d961

SHA512
57c0e1b87bc1c136f0d39f3ce64bb8f8274a0491e4ca6e45e5c7f9070aa9d9370c6f590ce37cd600b252df2638d870205249a514c43245ca7ed49017024a4672

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_0c35y55v.bgj.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3100-2-0x00000159D5270000-0x00000159D5292000-memory.dmp

Filesize
136KB

Download
memory/3100-14-0x00007FFDF1470000-0x00007FFDF1F31000-memory.dmp

Filesize
10.8MB

Download
memory/3100-17-0x00007FFDF1470000-0x00007FFDF1F31000-memory.dmp

Filesize
10.8MB

Download
memory/3100-13-0x00007FFDF1470000-0x00007FFDF1F31000-memory.dmp

Filesize
10.8MB

Download
memory/3100-12-0x00007FFDF1470000-0x00007FFDF1F31000-memory.dmp

Filesize
10.8MB

Download
memory/3996-0-0x00007FFDF1473000-0x00007FFDF1475000-memory.dmp

Filesize
8KB

Download
memory/3996-1-0x0000000000CF0000-0x0000000000D14000-memory.dmp

Filesize
144KB

Download
memory/3996-52-0x00007FFDF1473000-0x00007FFDF1475000-memory.dmp

Filesize
8KB

Download
memory/3996-57-0x00007FFDF1470000-0x00007FFDF1F31000-memory.dmp

Filesize
10.8MB

Download
memory/3996-58-0x00007FFDF1470000-0x00007FFDF1F31000-memory.dmp

Filesize
10.8MB

Download

Analysis

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