xworm | dd19ff97a15200e02ab698fe1087c4a6bfe89ac8852a057615b574bcbee961c2

General

Target

illict.gg.exe
Size

56KB
MD5

cc470d318018b2de7d43f6f17073016c
SHA1

109d25fae3c9bd01a10d816d1db1c3c93c66c7c5
SHA256

dd19ff97a15200e02ab698fe1087c4a6bfe89ac8852a057615b574bcbee961c2
SHA512

036e7528e149a81cadf2185b99b63ca481b05bd909b462a6bc8daf4ccf4279a7c5cff99dfbe6e90df0b96a041aa99c4948384e207db916b093a166e92b8fea4f
SSDEEP

1536:9j2/3YNHXwTyQl0RHskb0UlqXN+xD6QtGOxWq:xXw/8Mkb0Ux2OxWq

Score

10^/10

xworm bootkit defense_evasion discovery execution persistence rat trojan upx

Malware Config

Extracted

Family

xworm

C2

80.76.49.15:1111

Attributes

Install_directory
%AppData%
install_file
Xclient.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/3892-1-0x00000000009E0000-0x00000000009F4000-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
644	powershell.exe
4696	powershell.exe
1724	powershell.exe
2440	powershell.exe

Disables RegEdit via registry modification 1 IoCs

defense_evasion

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-1294999112-580688058-1763548717-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	lwyffu.exe

Disables Task Manager via registry modification
defense_evasion

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-1-5-21-1294999112-580688058-1763548717-1000\Control Panel\International\Geo\Nation	illict.gg.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
4248	lwyffu.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\A:	lwyffu.exe
File opened (read-only)	\??\L:	lwyffu.exe
File opened (read-only)	\??\P:	lwyffu.exe
File opened (read-only)	\??\S:	lwyffu.exe
File opened (read-only)	\??\X:	lwyffu.exe
File opened (read-only)	\??\M:	lwyffu.exe
File opened (read-only)	\??\U:	lwyffu.exe
File opened (read-only)	\??\V:	lwyffu.exe
File opened (read-only)	\??\E:	lwyffu.exe
File opened (read-only)	\??\G:	lwyffu.exe
File opened (read-only)	\??\J:	lwyffu.exe
File opened (read-only)	\??\N:	lwyffu.exe
File opened (read-only)	\??\O:	lwyffu.exe
File opened (read-only)	\??\W:	lwyffu.exe
File opened (read-only)	\??\Y:	lwyffu.exe
File opened (read-only)	\??\B:	lwyffu.exe
File opened (read-only)	\??\H:	lwyffu.exe
File opened (read-only)	\??\I:	lwyffu.exe
File opened (read-only)	\??\K:	lwyffu.exe
File opened (read-only)	\??\R:	lwyffu.exe
File opened (read-only)	\??\T:	lwyffu.exe
File opened (read-only)	\??\Z:	lwyffu.exe
File opened (read-only)	\??\Q:	lwyffu.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	lwyffu.exe

UPX packed file 23 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/files/0x0008000000023cb0-62.dat	upx
behavioral2/memory/4248-68-0x00000000004E0000-0x0000000000614000-memory.dmp	upx
behavioral2/memory/4248-71-0x00000000004E0000-0x0000000000614000-memory.dmp	upx
behavioral2/memory/4248-75-0x00000000004E0000-0x0000000000614000-memory.dmp	upx
behavioral2/memory/4248-76-0x00000000004E0000-0x0000000000614000-memory.dmp	upx
behavioral2/memory/4248-77-0x00000000004E0000-0x0000000000614000-memory.dmp	upx
behavioral2/memory/4248-80-0x00000000004E0000-0x0000000000614000-memory.dmp	upx
behavioral2/memory/4248-81-0x00000000004E0000-0x0000000000614000-memory.dmp	upx
behavioral2/memory/4248-82-0x00000000004E0000-0x0000000000614000-memory.dmp	upx
behavioral2/memory/4248-83-0x00000000004E0000-0x0000000000614000-memory.dmp	upx
behavioral2/memory/4248-84-0x00000000004E0000-0x0000000000614000-memory.dmp	upx
behavioral2/memory/4248-85-0x00000000004E0000-0x0000000000614000-memory.dmp	upx
behavioral2/memory/4248-86-0x00000000004E0000-0x0000000000614000-memory.dmp	upx
behavioral2/memory/4248-87-0x00000000004E0000-0x0000000000614000-memory.dmp	upx
behavioral2/memory/4248-88-0x00000000004E0000-0x0000000000614000-memory.dmp	upx
behavioral2/memory/4248-89-0x00000000004E0000-0x0000000000614000-memory.dmp	upx
behavioral2/memory/4248-90-0x00000000004E0000-0x0000000000614000-memory.dmp	upx
behavioral2/memory/4248-91-0x00000000004E0000-0x0000000000614000-memory.dmp	upx
behavioral2/memory/4248-92-0x00000000004E0000-0x0000000000614000-memory.dmp	upx
behavioral2/memory/4248-93-0x00000000004E0000-0x0000000000614000-memory.dmp	upx
behavioral2/memory/4248-94-0x00000000004E0000-0x0000000000614000-memory.dmp	upx
behavioral2/memory/4248-95-0x00000000004E0000-0x0000000000614000-memory.dmp	upx
behavioral2/memory/4248-97-0x00000000004E0000-0x0000000000614000-memory.dmp	upx

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

System Information Discovery
T1082

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	lwyffu.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
644	powershell.exe
644	powershell.exe
4696	powershell.exe
4696	powershell.exe
1724	powershell.exe
1724	powershell.exe
2440	powershell.exe
2440	powershell.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	3892	illict.gg.exe
Token: SeDebugPrivilege	644	powershell.exe
Token: SeDebugPrivilege	4696	powershell.exe
Token: SeDebugPrivilege	1724	powershell.exe
Token: SeDebugPrivilege	2440	powershell.exe
Token: SeDebugPrivilege	3892	illict.gg.exe
Token: 33	456	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	456	AUDIODG.EXE

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3892 wrote to memory of 644	3892	illict.gg.exe	91
PID 3892 wrote to memory of 644	3892	illict.gg.exe	91
PID 3892 wrote to memory of 4696	3892	illict.gg.exe	94
PID 3892 wrote to memory of 4696	3892	illict.gg.exe	94
PID 3892 wrote to memory of 1724	3892	illict.gg.exe	98
PID 3892 wrote to memory of 1724	3892	illict.gg.exe	98
PID 3892 wrote to memory of 2440	3892	illict.gg.exe	100
PID 3892 wrote to memory of 2440	3892	illict.gg.exe	100
PID 3892 wrote to memory of 4248	3892	illict.gg.exe	107
PID 3892 wrote to memory of 4248	3892	illict.gg.exe	107
PID 3892 wrote to memory of 4248	3892	illict.gg.exe	107

C:\Users\Admin\AppData\Local\Temp\illict.gg.exe
"C:\Users\Admin\AppData\Local\Temp\illict.gg.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3892
- 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\illict.gg.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:644
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'illict.gg.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4696
- 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⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1724
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Xclient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2440
- C:\Users\Admin\AppData\Local\Temp\lwyffu.exe
  "C:\Users\Admin\AppData\Local\Temp\lwyffu.exe"
  2⤵
  - Disables RegEdit via registry modification
  - Executes dropped EXE
  - Enumerates connected drives
  - Writes to the Master Boot Record (MBR)
  - System Location Discovery: System Language Discovery
  PID:4248

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x47c 0x3c8
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:456

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

3

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

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
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
bd5940f08d0be56e65e5f2aaf47c538e

SHA1
d7e31b87866e5e383ab5499da64aba50f03e8443

SHA256
2d2f364c75bd2897504249f42cdf1d19374f5230aad68fa9154ea3d03e3031a6

SHA512
c34d10c7e07da44a180fae9889b61f08903aa84e8ddfa80c31c272b1ef9d491b8cec6b8a4c836c3cb1583fe8f4955c6a8db872515de3a9e10eae09610c959406

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

Filesize
944B

MD5
22310ad6749d8cc38284aa616efcd100

SHA1
440ef4a0a53bfa7c83fe84326a1dff4326dcb515

SHA256
55b1d8021c4eb4c3c0d75e3ed7a4eb30cd0123e3d69f32eeb596fe4ffec05abf

SHA512
2ef08e2ee15bb86695fe0c10533014ffed76ececc6e579d299d3365fafb7627f53e32e600bb6d872b9f58aca94f8cb7e1e94cdfd14777527f7f0aa019d9c6def

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

Filesize
944B

MD5
ba169f4dcbbf147fe78ef0061a95e83b

SHA1
92a571a6eef49fff666e0f62a3545bcd1cdcda67

SHA256
5ef1421e19fde4bc03cd825dd7d6c0e7863f85fd8f0aa4a4d4f8d555dc7606d1

SHA512
8d2e5e552210dcda684682538bc964fdd8a8ff5b24cc2cc8af813729f0202191f98eb42d38d2355df17ae620fe401aad6ceaedaed3b112fdacd32485a3a0c07c

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_c4tjzk2p.3ze.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
188KB

MD5
14acdf9be02d33d3674041fb82fb1df4

SHA1
0191ae0a905df04be2771c4591d9847c15eb0fa3

SHA256
094d9b5aa73c4eee432d3b3e87b4ba55428f7a2064c5e7c79223bf7f4739ac17

SHA512
5215222472ff7049571d2e28316b0edadac18f27faef89ec6652c0de696403dbfd0f9b45a5af08012f4a96d72301790ce28787e7a3b65151e79120f8f3a2c18d

Download Submit
memory/644-13-0x00007FFCD1AD0000-0x00007FFCD2591000-memory.dmp

Filesize
10.8MB

Download
memory/644-16-0x00007FFCD1AD0000-0x00007FFCD2591000-memory.dmp

Filesize
10.8MB

Download
memory/644-12-0x00007FFCD1AD0000-0x00007FFCD2591000-memory.dmp

Filesize
10.8MB

Download
memory/644-2-0x00000177574C0000-0x00000177574E2000-memory.dmp

Filesize
136KB

Download
memory/3892-0-0x00007FFCD1AD3000-0x00007FFCD1AD5000-memory.dmp

Filesize
8KB

Download
memory/3892-1-0x00000000009E0000-0x00000000009F4000-memory.dmp

Filesize
80KB

Download
memory/3892-55-0x00007FFCD1AD0000-0x00007FFCD2591000-memory.dmp

Filesize
10.8MB

Download
memory/3892-56-0x00007FFCD1AD3000-0x00007FFCD1AD5000-memory.dmp

Filesize
8KB

Download
memory/3892-57-0x00007FFCD1AD0000-0x00007FFCD2591000-memory.dmp

Filesize
10.8MB

Download
memory/4248-76-0x00000000004E0000-0x0000000000614000-memory.dmp

Filesize
1.2MB

Download
memory/4248-86-0x00000000004E0000-0x0000000000614000-memory.dmp

Filesize
1.2MB

Download
memory/4248-75-0x00000000004E0000-0x0000000000614000-memory.dmp

Filesize
1.2MB

Download
memory/4248-68-0x00000000004E0000-0x0000000000614000-memory.dmp

Filesize
1.2MB

Download
memory/4248-77-0x00000000004E0000-0x0000000000614000-memory.dmp

Filesize
1.2MB

Download
memory/4248-80-0x00000000004E0000-0x0000000000614000-memory.dmp

Filesize
1.2MB

Download
memory/4248-81-0x00000000004E0000-0x0000000000614000-memory.dmp

Filesize
1.2MB

Download
memory/4248-82-0x00000000004E0000-0x0000000000614000-memory.dmp

Filesize
1.2MB

Download
memory/4248-83-0x00000000004E0000-0x0000000000614000-memory.dmp

Filesize
1.2MB

Download
memory/4248-84-0x00000000004E0000-0x0000000000614000-memory.dmp

Filesize
1.2MB

Download
memory/4248-85-0x00000000004E0000-0x0000000000614000-memory.dmp

Filesize
1.2MB

Download
memory/4248-71-0x00000000004E0000-0x0000000000614000-memory.dmp

Filesize
1.2MB

Download
memory/4248-87-0x00000000004E0000-0x0000000000614000-memory.dmp

Filesize
1.2MB

Download
memory/4248-88-0x00000000004E0000-0x0000000000614000-memory.dmp

Filesize
1.2MB

Download
memory/4248-89-0x00000000004E0000-0x0000000000614000-memory.dmp

Filesize
1.2MB

Download
memory/4248-90-0x00000000004E0000-0x0000000000614000-memory.dmp

Filesize
1.2MB

Download
memory/4248-91-0x00000000004E0000-0x0000000000614000-memory.dmp

Filesize
1.2MB

Download
memory/4248-92-0x00000000004E0000-0x0000000000614000-memory.dmp

Filesize
1.2MB

Download
memory/4248-93-0x00000000004E0000-0x0000000000614000-memory.dmp

Filesize
1.2MB

Download
memory/4248-94-0x00000000004E0000-0x0000000000614000-memory.dmp

Filesize
1.2MB

Download
memory/4248-95-0x00000000004E0000-0x0000000000614000-memory.dmp

Filesize
1.2MB

Download
memory/4248-97-0x00000000004E0000-0x0000000000614000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads