plugx | 3f5c2045c0cdaab917b612ac86706d904912415c2485ec5801edf74a3a485154

General

Target

PS/RsTray.exe
Size

174KB
MD5

d65adc7ad95e88fab486707b8c228f17
SHA1

dfa0589b58a469e34695a22313d184e5352a3282
SHA256

a3674fef407c354e911a8a6c7d4b991802c47cf6409d6dc32dc84be6312159e2
SHA512

3c9114610dfc107adec6a6220356607c737499866eba965985bb1f6b9aedbfae529a5432abb8307ce0653580fab9c2580c66d96ef4cdb4319a0fde5ad3c3ac01
SSDEEP

3072:wq1/mmpPCL8OZwevvCRmvUGmeU1hbFZJslQLRzMaZ:wUmqCL8Oj3XZm5jNLRzVZ

Score

10^/10

plugx discovery trojan

Malware Config

Signatures

Detects PlugX payload 17 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1712-1-0x0000000000350000-0x0000000000381000-memory.dmp	family_plugx
behavioral1/memory/2456-20-0x0000000000340000-0x0000000000371000-memory.dmp	family_plugx
behavioral1/memory/2456-19-0x0000000000340000-0x0000000000371000-memory.dmp	family_plugx
behavioral1/memory/1712-30-0x0000000000350000-0x0000000000381000-memory.dmp	family_plugx
behavioral1/memory/264-26-0x00000000001B0000-0x00000000001E1000-memory.dmp	family_plugx
behavioral1/memory/264-45-0x00000000001B0000-0x00000000001E1000-memory.dmp	family_plugx
behavioral1/memory/264-44-0x00000000001B0000-0x00000000001E1000-memory.dmp	family_plugx
behavioral1/memory/264-43-0x00000000001B0000-0x00000000001E1000-memory.dmp	family_plugx
behavioral1/memory/264-32-0x00000000001B0000-0x00000000001E1000-memory.dmp	family_plugx
behavioral1/memory/264-49-0x00000000001B0000-0x00000000001E1000-memory.dmp	family_plugx
behavioral1/memory/2668-62-0x0000000000350000-0x0000000000381000-memory.dmp	family_plugx
behavioral1/memory/2668-68-0x0000000000350000-0x0000000000381000-memory.dmp	family_plugx
behavioral1/memory/2668-69-0x0000000000350000-0x0000000000381000-memory.dmp	family_plugx
behavioral1/memory/264-70-0x00000000001B0000-0x00000000001E1000-memory.dmp	family_plugx
behavioral1/memory/2668-71-0x0000000000350000-0x0000000000381000-memory.dmp	family_plugx
behavioral1/memory/264-74-0x00000000001B0000-0x00000000001E1000-memory.dmp	family_plugx
behavioral1/memory/264-75-0x00000000001B0000-0x00000000001E1000-memory.dmp	family_plugx

PlugX
PlugX is a RAT (Remote Access Trojan) that has been around since 2008.
trojan plugx
Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

264 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

RsTray.exe

pid process

2456 RsTray.exe
Loads dropped DLL 1 IoCs

Processes:

RsTray.exe

pid process

2456 RsTray.exe

pid	process
2456	RsTray.exe

pid	process
2456	RsTray.exe

System Location Discovery: System Language Discovery 1 TTPs 4 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

Processes:

RsTray.exesvchost.exemsiexec.exeRsTray.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RsTray.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msiexec.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RsTray.exe

Modifies data under HKEY_USERS 12 IoCs

Processes:

svchost.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{70E5B1AB-7DFF-4EAE-AB29-C004FC8AA0F1}	svchost.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{70E5B1AB-7DFF-4EAE-AB29-C004FC8AA0F1}\WpadDecisionReason = "1"	svchost.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{70E5B1AB-7DFF-4EAE-AB29-C004FC8AA0F1}\WpadDecisionTime = 70d9437bed04db01	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	svchost.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{70E5B1AB-7DFF-4EAE-AB29-C004FC8AA0F1}\WpadNetworkName = "Network 3"	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\32-0a-50-5a-5e-3f	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{70E5B1AB-7DFF-4EAE-AB29-C004FC8AA0F1}\32-0a-50-5a-5e-3f	svchost.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\32-0a-50-5a-5e-3f\WpadDecisionReason = "1"	svchost.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\32-0a-50-5a-5e-3f\WpadDecisionTime = 70d9437bed04db01	svchost.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\32-0a-50-5a-5e-3f\WpadDecision = "0"	svchost.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\32-0a-50-5a-5e-3f\WpadDetectedUrl	svchost.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{70E5B1AB-7DFF-4EAE-AB29-C004FC8AA0F1}\WpadDecision = "0"	svchost.exe

Modifies registry class 2 IoCs

Processes:

svchost.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\Software\CLASSES\FAST	svchost.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\FAST\CLSID = 37003300310030003300310031004200440033003400320044003300370044000000	svchost.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

svchost.exemsiexec.exe

pid	process
264	svchost.exe
264	svchost.exe
264	svchost.exe
264	svchost.exe
264	svchost.exe
264	svchost.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
264	svchost.exe
264	svchost.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
264	svchost.exe
264	svchost.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
264	svchost.exe
264	svchost.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
264	svchost.exe
264	svchost.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe
2668	msiexec.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

Processes:

svchost.exemsiexec.exe

pid process

264 svchost.exe
2668 msiexec.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

Processes:

RsTray.exeRsTray.exesvchost.exemsiexec.exe

description	pid	process
Token: SeDebugPrivilege	1712	RsTray.exe
Token: SeTcbPrivilege	1712	RsTray.exe
Token: SeDebugPrivilege	2456	RsTray.exe
Token: SeTcbPrivilege	2456	RsTray.exe
Token: SeDebugPrivilege	264	svchost.exe
Token: SeTcbPrivilege	264	svchost.exe
Token: SeDebugPrivilege	2668	msiexec.exe
Token: SeTcbPrivilege	2668	msiexec.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

RsTray.exesvchost.exe

description	pid	process	target process
PID 2456 wrote to memory of 264	2456	RsTray.exe	svchost.exe
PID 2456 wrote to memory of 264	2456	RsTray.exe	svchost.exe
PID 2456 wrote to memory of 264	2456	RsTray.exe	svchost.exe
PID 2456 wrote to memory of 264	2456	RsTray.exe	svchost.exe
PID 2456 wrote to memory of 264	2456	RsTray.exe	svchost.exe
PID 2456 wrote to memory of 264	2456	RsTray.exe	svchost.exe
PID 2456 wrote to memory of 264	2456	RsTray.exe	svchost.exe
PID 2456 wrote to memory of 264	2456	RsTray.exe	svchost.exe
PID 2456 wrote to memory of 264	2456	RsTray.exe	svchost.exe
PID 264 wrote to memory of 2668	264	svchost.exe	msiexec.exe
PID 264 wrote to memory of 2668	264	svchost.exe	msiexec.exe
PID 264 wrote to memory of 2668	264	svchost.exe	msiexec.exe
PID 264 wrote to memory of 2668	264	svchost.exe	msiexec.exe
PID 264 wrote to memory of 2668	264	svchost.exe	msiexec.exe
PID 264 wrote to memory of 2668	264	svchost.exe	msiexec.exe
PID 264 wrote to memory of 2668	264	svchost.exe	msiexec.exe
PID 264 wrote to memory of 2668	264	svchost.exe	msiexec.exe
PID 264 wrote to memory of 2668	264	svchost.exe	msiexec.exe
PID 264 wrote to memory of 2668	264	svchost.exe	msiexec.exe
PID 264 wrote to memory of 2668	264	svchost.exe	msiexec.exe
PID 264 wrote to memory of 2668	264	svchost.exe	msiexec.exe

C:\Users\Admin\AppData\Local\Temp\PS\RsTray.exe
"C:\Users\Admin\AppData\Local\Temp\PS\RsTray.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1712

C:\ProgramData\PS\RsTray.exe
C:\ProgramData\PS\RsTray.exe
1⤵
- Executes dropped EXE
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2456
- C:\Windows\SysWOW64\svchost.exe
  C:\Windows\system32\svchost.exe 201 0
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - Modifies data under HKEY_USERS
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:264
- - C:\Windows\SysWOW64\msiexec.exe
    C:\Windows\system32\msiexec.exe 209 264
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    PID:2668

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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:\ProgramData\PS\RsTray.exe

Filesize
174KB

MD5
d65adc7ad95e88fab486707b8c228f17

SHA1
dfa0589b58a469e34695a22313d184e5352a3282

SHA256
a3674fef407c354e911a8a6c7d4b991802c47cf6409d6dc32dc84be6312159e2

SHA512
3c9114610dfc107adec6a6220356607c737499866eba965985bb1f6b9aedbfae529a5432abb8307ce0653580fab9c2580c66d96ef4cdb4319a0fde5ad3c3ac01

Download Submit
C:\ProgramData\PS\comserv.dll.url

Filesize
122KB

MD5
fe14ef97d52c1c4f4764c36b76f18340

SHA1
60a931c6607ffe7dabdce33151f7d217b7581175

SHA256
d8c68c81908ca0b31a773cf78bc59b9d886ba72177b2b4f5a1d9ea46b95ce05e

SHA512
390366a82817d8e841084744cd879bd7be6ce1dff85e26e9fe4739b709c17718c4e836f2f543c1d84f47096230e2d9dbc6dab6c597acc8ae802c43b1d4ae7f0d

Download Submit
C:\ProgramData\SxS\bug.log

Filesize
980B

MD5
2ab1f40669ffeb04b653434eb2e66468

SHA1
6e6f31ae3ccda0f5b951899ddc0099d1c26df16a

SHA256
8fd63678dbd09e3c0a44607315240448e4ff458f378b1c7e9f51cb19625e149d

SHA512
e8dedd2a58c87d5d26ccb3083c73ffc32dcd99d180301e898fc5fbc2a036a41dad97cff2746b9ba2b8a5462ec06110647883026a7b0ff73dfb102a3bc9c03515

Download Submit
C:\ProgramData\SxS\bug.log

Filesize
1KB

MD5
9067e7e1034af43f1b40826032c9459e

SHA1
800721d32d008aa7ae1c46b9dc583b87a80a98a9

SHA256
0354af58726678fa4c450a01b21032d96b4dff920d6045cb82c0c49ddbfdecdb

SHA512
f9597148ba8070c6289637f40f76a8e2e6e7230811ec3b506fa2086e4bc9f81c45211101bc3a92b7c9798f95c1abae3499d86fd4fb3ec528239ead8a84f76730

Download Submit
\ProgramData\PS\comserv.dll

Filesize
2KB

MD5
6d54b4f07a1b92bd6fafe7160b2c887c

SHA1
6bf4a36e729a2c4156b1280db97252ba8ea7d9b4

SHA256
653fe0ab7b634e50ba09f962c6357bcf76ce633768aa41dd01d1a93ef83a0a54

SHA512
32c57ca7ce437fc7712948a6f30733112830ff570d89ca903e5a5bdec43277a19a453df8c027e0835ad1dff2f7927cf973e33efa1847ed608cb6eb534d8163a3

Download Submit
memory/264-26-0x00000000001B0000-0x00000000001E1000-memory.dmp

Filesize
196KB

Download
memory/264-44-0x00000000001B0000-0x00000000001E1000-memory.dmp

Filesize
196KB

Download
memory/264-74-0x00000000001B0000-0x00000000001E1000-memory.dmp

Filesize
196KB

Download
memory/264-25-0x00000000000C0000-0x00000000000C1000-memory.dmp

Filesize
4KB

Download
memory/264-23-0x00000000000E0000-0x00000000000FD000-memory.dmp

Filesize
116KB

Download
memory/264-24-0x0000000000100000-0x0000000000102000-memory.dmp

Filesize
8KB

Download
memory/264-21-0x00000000000C0000-0x00000000000C1000-memory.dmp

Filesize
4KB

Download
memory/264-75-0x00000000001B0000-0x00000000001E1000-memory.dmp

Filesize
196KB

Download
memory/264-45-0x00000000001B0000-0x00000000001E1000-memory.dmp

Filesize
196KB

Download
memory/264-70-0x00000000001B0000-0x00000000001E1000-memory.dmp

Filesize
196KB

Download
memory/264-43-0x00000000001B0000-0x00000000001E1000-memory.dmp

Filesize
196KB

Download
memory/264-42-0x0000000000020000-0x0000000000021000-memory.dmp

Filesize
4KB

Download
memory/264-32-0x00000000001B0000-0x00000000001E1000-memory.dmp

Filesize
196KB

Download
memory/264-49-0x00000000001B0000-0x00000000001E1000-memory.dmp

Filesize
196KB

Download
memory/1712-30-0x0000000000350000-0x0000000000381000-memory.dmp

Filesize
196KB

Download
memory/1712-1-0x0000000000350000-0x0000000000381000-memory.dmp

Filesize
196KB

Download
memory/1712-0-0x0000000001EA0000-0x0000000001FA0000-memory.dmp

Filesize
1024KB

Download
memory/2456-19-0x0000000000340000-0x0000000000371000-memory.dmp

Filesize
196KB

Download
memory/2456-20-0x0000000000340000-0x0000000000371000-memory.dmp

Filesize
196KB

Download
memory/2668-68-0x0000000000350000-0x0000000000381000-memory.dmp

Filesize
196KB

Download
memory/2668-69-0x0000000000350000-0x0000000000381000-memory.dmp

Filesize
196KB

Download
memory/2668-67-0x0000000000090000-0x0000000000091000-memory.dmp

Filesize
4KB

Download
memory/2668-71-0x0000000000350000-0x0000000000381000-memory.dmp

Filesize
196KB

Download
memory/2668-62-0x0000000000350000-0x0000000000381000-memory.dmp

Filesize
196KB

Download
memory/2668-61-0x0000000000090000-0x0000000000091000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads