xworm | 7c44a53d9f8a00b1440736ecfa20e898261d579bfd24020d8b2cccb0f97cf406

General

Target

XClient.exe
Size

62KB
MD5

339fbfd079c07fd3b199fe7e216a21e4
SHA1

0582ed5e783175e5bf852e6ed14c58c673e40635
SHA256

7c44a53d9f8a00b1440736ecfa20e898261d579bfd24020d8b2cccb0f97cf406
SHA512

6f734fd632974fa0f3fda9e0baa3ee41d8d3b3ba2a4680b2e42c45454a60e21af46eae9be7c2d2894e8d711c6ecd73efe079d1e012eb1045c2dd50335193743b
SSDEEP

1536:aGv+BxGsgr3+NF4YVAjkbjQrojT6qIPcOFsNB:ZQ4h3kbMruWcOaNB

Score

10^/10

xworm rat trojan

Malware Config

Extracted

Family

xworm

C2

funut-21066.portmap.io:47702

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/1908-0-0x0000000000070000-0x0000000000086000-memory.dmp	family_xworm

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

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-1-5-21-1712835645-2080934712-2142796781-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	XClient.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	XClient.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
4452	powershell.exe
4452	powershell.exe
4952	powershell.exe
4952	powershell.exe
1180	powershell.exe
1180	powershell.exe
1276	powershell.exe
1276	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1908	XClient.exe
Token: SeDebugPrivilege	4452	powershell.exe
Token: SeDebugPrivilege	4952	powershell.exe
Token: SeDebugPrivilege	1180	powershell.exe
Token: SeDebugPrivilege	1276	powershell.exe
Token: SeDebugPrivilege	1908	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1908 wrote to memory of 4452	1908	XClient.exe	91
PID 1908 wrote to memory of 4452	1908	XClient.exe	91
PID 1908 wrote to memory of 4952	1908	XClient.exe	94
PID 1908 wrote to memory of 4952	1908	XClient.exe	94
PID 1908 wrote to memory of 1180	1908	XClient.exe	96
PID 1908 wrote to memory of 1180	1908	XClient.exe	96
PID 1908 wrote to memory of 1276	1908	XClient.exe	98
PID 1908 wrote to memory of 1276	1908	XClient.exe	98

C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1908
- 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\XClient.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4452
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4952
- 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\XClient.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1180
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1276

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
2KB

MD5
440cb38dbee06645cc8b74d51f6e5f71

SHA1
d7e61da91dc4502e9ae83281b88c1e48584edb7c

SHA256
8ef7a682dfd99ff5b7e9de0e1be43f0016d68695a43c33c028af2635cc15ecfe

SHA512
3aab19578535e6ba0f6beb5690c87d970292100704209d2dcebddcdd46c6bead27588ef5d98729bfd50606a54cc1edf608b3d15bef42c13b9982aaaf15de7fd6

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

Filesize
944B

MD5
359d1e37a264703c99ebd01eed362de5

SHA1
a1122c8bf9848b3371cd191ba540864204d1d845

SHA256
5781f3046b0d978469415a059cf5ceae0e532869e69ab1dffb8ed878bd299b07

SHA512
ce3caa1d2205be8167b7cd48ebf538a9ce8c148643c26a20377894aa15cf00f90b2b5e2ebf35d40a0273c088abc11fe6f010e34691d7fbc4bef8d7e482f5087d

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

Filesize
944B

MD5
2d06ce10e4e5b9e174b5ebbdad300fad

SHA1
bcc1c231e22238cef02ae25331320060ada2f131

SHA256
87d1dd56f12a88907ba5aebca8d555443d6f77ed214497277cc8bcd31c669f2c

SHA512
38cfbeb59605854ae4fcfae8619a6b26bd916148acfb5636383672a3960b45ca41fed5c241f97465129e92eaf78c4c85dcf258f1ab501a2bf771287ce04f76a7

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

Filesize
944B

MD5
ce4540390cc4841c8973eb5a3e9f4f7d

SHA1
2293f30a6f4c9538bc5b06606c10a50ab4ecef8e

SHA256
e834e1da338b9644d538cefd70176768816da2556939c1255d386931bd085105

SHA512
2a3e466cb5a81d2b65256053b768a98321eb3e65ff46353eefc9864f14a391748116f050e7482ddd73a51575bf0a6fc5c673023dade62dbd8b174442bae1cc6b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_xaaaqrb1.1fh.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1180-47-0x0000021CA1530000-0x0000021CA1540000-memory.dmp

Filesize
64KB

Download
memory/1180-34-0x00007FFC0CEF0000-0x00007FFC0D9B1000-memory.dmp

Filesize
10.8MB

Download
memory/1180-49-0x00007FFC0CEF0000-0x00007FFC0D9B1000-memory.dmp

Filesize
10.8MB

Download
memory/1180-36-0x0000021CA1530000-0x0000021CA1540000-memory.dmp

Filesize
64KB

Download
memory/1180-35-0x0000021CA1530000-0x0000021CA1540000-memory.dmp

Filesize
64KB

Download
memory/1276-51-0x00000286F3AD0000-0x00000286F3AE0000-memory.dmp

Filesize
64KB

Download
memory/1276-63-0x00007FFC0CEF0000-0x00007FFC0D9B1000-memory.dmp

Filesize
10.8MB

Download
memory/1276-50-0x00007FFC0CEF0000-0x00007FFC0D9B1000-memory.dmp

Filesize
10.8MB

Download
memory/1908-0-0x0000000000070000-0x0000000000086000-memory.dmp

Filesize
88KB

Download
memory/1908-70-0x000000001AED0000-0x000000001AEE0000-memory.dmp

Filesize
64KB

Download
memory/1908-69-0x00007FFC0CEF0000-0x00007FFC0D9B1000-memory.dmp

Filesize
10.8MB

Download
memory/1908-68-0x000000001AED0000-0x000000001AEE0000-memory.dmp

Filesize
64KB

Download
memory/1908-1-0x00007FFC0CEF0000-0x00007FFC0D9B1000-memory.dmp

Filesize
10.8MB

Download
memory/4452-17-0x00007FFC0CEF0000-0x00007FFC0D9B1000-memory.dmp

Filesize
10.8MB

Download
memory/4452-3-0x0000023C6F8F0000-0x0000023C6F900000-memory.dmp

Filesize
64KB

Download
memory/4452-2-0x00007FFC0CEF0000-0x00007FFC0D9B1000-memory.dmp

Filesize
10.8MB

Download
memory/4452-10-0x0000023C574A0000-0x0000023C574C2000-memory.dmp

Filesize
136KB

Download
memory/4452-4-0x0000023C6F8F0000-0x0000023C6F900000-memory.dmp

Filesize
64KB

Download
memory/4952-28-0x00007FFC0CEF0000-0x00007FFC0D9B1000-memory.dmp

Filesize
10.8MB

Download
memory/4952-29-0x000001D6E8270000-0x000001D6E8280000-memory.dmp

Filesize
64KB

Download
memory/4952-33-0x00007FFC0CEF0000-0x00007FFC0D9B1000-memory.dmp

Filesize
10.8MB

Download
memory/4952-30-0x000001D6E8270000-0x000001D6E8280000-memory.dmp

Filesize
64KB

Download

Analysis

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