xworm | c352c942b6df33510094c7100fb9d48e36b8e1e2af40a60ccc360b58721c2390

General

Target

15415145.exe
Size

59KB
MD5

6c091ad6fae0fa76f44870d1a1b05cb4
SHA1

040f60c0ee3f4902f919025057e34ab4d11b1abd
SHA256

c352c942b6df33510094c7100fb9d48e36b8e1e2af40a60ccc360b58721c2390
SHA512

3a414f40f99e5847d9631c4ac1143c76e77db7ae42dd8c7aed2ebf1742ec73bb802d54d6cbde3b04f6b894a4cf731aa4e9dbad95166bade13f787b489d8e8d86
SSDEEP

1536:skyZtyUQ8sBkROLW+UzbTH3gfm2qt0OgSko7:skItfQ8sBkROUzbTQf+6OgK7

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

C2

known-savage.gl.at.ply.gg:45116

association-lectures.gl.at.ply.gg:32463

Attributes

Install_directory
%AppData%
install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2248-1-0x0000000000870000-0x0000000000886000-memory.dmp	family_xworm
behavioral1/files/0x000f000000023b2c-8.dat	family_xworm
behavioral1/files/0x000f000000023b5a-24.dat	family_xworm
behavioral1/memory/2116-31-0x00000000007B0000-0x00000000007BE000-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 3 IoCs

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

execution

PowerShell

T1059.001

pid	Process
1664	powershell.exe
4484	powershell.exe
2992	powershell.exe

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-1-5-21-250031470-1197856012-2659781506-1000\Control Panel\International\Geo\Nation	15415145.exe
Key value queried	\REGISTRY\USER\S-1-5-21-250031470-1197856012-2659781506-1000\Control Panel\International\Geo\Nation	wpeqkb.exe

Drops startup file 4 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\15415145.lnk	15415145.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\15415145.lnk	15415145.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\wpeqkb.lnk	wpeqkb.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\wpeqkb.lnk	wpeqkb.exe

Executes dropped EXE 5 IoCs

pid	Process
3464	15415145.exe
4976	15415145.exe
2116	wpeqkb.exe
2032	xfnbvp.exe
844	keiize.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-250031470-1197856012-2659781506-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\15415145 = "C:\\Users\\Admin\\AppData\\Roaming\\15415145.exe"	15415145.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-250031470-1197856012-2659781506-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\wpeqkb = "C:\\Users\\Admin\\AppData\\Roaming\\wpeqkb.exe"	wpeqkb.exe

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
1140	schtasks.exe
2832	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1664	powershell.exe
1664	powershell.exe
4484	powershell.exe
4484	powershell.exe
2992	powershell.exe
2992	powershell.exe

Suspicious use of AdjustPrivilegeToken 11 IoCs

description	pid	Process
Token: SeDebugPrivilege	2248	15415145.exe
Token: SeDebugPrivilege	2248	15415145.exe
Token: SeDebugPrivilege	3464	15415145.exe
Token: SeDebugPrivilege	4976	15415145.exe
Token: SeDebugPrivilege	2116	wpeqkb.exe
Token: SeDebugPrivilege	1664	powershell.exe
Token: SeDebugPrivilege	2032	xfnbvp.exe
Token: SeDebugPrivilege	4484	powershell.exe
Token: SeDebugPrivilege	2992	powershell.exe
Token: SeDebugPrivilege	844	keiize.exe
Token: SeDebugPrivilege	2116	wpeqkb.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2248 wrote to memory of 1140	2248	15415145.exe	94
PID 2248 wrote to memory of 1140	2248	15415145.exe	94
PID 2248 wrote to memory of 2116	2248	15415145.exe	115
PID 2248 wrote to memory of 2116	2248	15415145.exe	115
PID 2116 wrote to memory of 1664	2116	wpeqkb.exe	116
PID 2116 wrote to memory of 1664	2116	wpeqkb.exe	116
PID 2248 wrote to memory of 2032	2248	15415145.exe	118
PID 2248 wrote to memory of 2032	2248	15415145.exe	118
PID 2116 wrote to memory of 4484	2116	wpeqkb.exe	119
PID 2116 wrote to memory of 4484	2116	wpeqkb.exe	119
PID 2116 wrote to memory of 2992	2116	wpeqkb.exe	121
PID 2116 wrote to memory of 2992	2116	wpeqkb.exe	121
PID 2116 wrote to memory of 2832	2116	wpeqkb.exe	123
PID 2116 wrote to memory of 2832	2116	wpeqkb.exe	123
PID 2248 wrote to memory of 844	2248	15415145.exe	125
PID 2248 wrote to memory of 844	2248	15415145.exe	125

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\15415145.exe
"C:\Users\Admin\AppData\Local\Temp\15415145.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2248
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "15415145" /tr "C:\Users\Admin\AppData\Roaming\15415145.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1140
- C:\Users\Admin\AppData\Local\Temp\wpeqkb.exe
  "C:\Users\Admin\AppData\Local\Temp\wpeqkb.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2116
- - 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\wpeqkb.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1664
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'wpeqkb.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4484
- - 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\wpeqkb.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2992
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "wpeqkb" /tr "C:\Users\Admin\AppData\Roaming\wpeqkb.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2832
- C:\Users\Admin\AppData\Local\Temp\xfnbvp.exe
  "C:\Users\Admin\AppData\Local\Temp\xfnbvp.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2032
- C:\Users\Admin\AppData\Local\Temp\keiize.exe
  "C:\Users\Admin\AppData\Local\Temp\keiize.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:844

C:\Users\Admin\AppData\Roaming\15415145.exe
C:\Users\Admin\AppData\Roaming\15415145.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3464

C:\Users\Admin\AppData\Roaming\15415145.exe
C:\Users\Admin\AppData\Roaming\15415145.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4976

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

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\15415145.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
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
cadef9abd087803c630df65264a6c81c

SHA1
babbf3636c347c8727c35f3eef2ee643dbcc4bd2

SHA256
cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438

SHA512
7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085

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

Filesize
944B

MD5
05b1e52b445582c060c505f3d89bc540

SHA1
acb74be5e672dc409bd265a30e7ae2df96bfa975

SHA256
50184106d36bc22f8856534b64698338a0d7a4813d1b5802f0ae09ec9d995c7a

SHA512
1040f2ebea0cfc242d64a3ef36a8aa212bd7b2d45ecf518599f89cb2799568ba8d2361f900b61d753606bf5035d7340b47de13cf1de21ad29cceb76e0f194bf6

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lj2vwxxa.eo5.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\wpeqkb.exe

Filesize
34KB

MD5
950d739da650457fab6a225545794238

SHA1
e965286161ecda1b8c0072d8a2d80c191bb15705

SHA256
a571fcac5384158c4927e7c7cf07182b68eccf67845ba927beae44cd9835e3f8

SHA512
b7b91343176c5a7f6408b21fbc96c23d0b02c080b846e29f304ba91de1d0f37a772953e7ab65d1d627cb3490fbef3b85681564e878d8dcda57c0897dbad1d19b

Download Submit
C:\Users\Admin\AppData\Roaming\15415145.exe

Filesize
59KB

MD5
6c091ad6fae0fa76f44870d1a1b05cb4

SHA1
040f60c0ee3f4902f919025057e34ab4d11b1abd

SHA256
c352c942b6df33510094c7100fb9d48e36b8e1e2af40a60ccc360b58721c2390

SHA512
3a414f40f99e5847d9631c4ac1143c76e77db7ae42dd8c7aed2ebf1742ec73bb802d54d6cbde3b04f6b894a4cf731aa4e9dbad95166bade13f787b489d8e8d86

Download Submit
memory/1664-33-0x000001914A5A0000-0x000001914A5C2000-memory.dmp

Filesize
136KB

Download
memory/2116-31-0x00000000007B0000-0x00000000007BE000-memory.dmp

Filesize
56KB

Download
memory/2248-10-0x00007FFD16F50000-0x00007FFD17A11000-memory.dmp

Filesize
10.8MB

Download
memory/2248-11-0x00007FFD16F50000-0x00007FFD17A11000-memory.dmp

Filesize
10.8MB

Download
memory/2248-0-0x00007FFD16F53000-0x00007FFD16F55000-memory.dmp

Filesize
8KB

Download
memory/2248-1-0x0000000000870000-0x0000000000886000-memory.dmp

Filesize
88KB

Download
memory/3464-16-0x00007FFD16F50000-0x00007FFD17A11000-memory.dmp

Filesize
10.8MB

Download
memory/3464-14-0x00007FFD16F50000-0x00007FFD17A11000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads