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/2948-1-0x0000000001DE0000-0x0000000001E11000-memory.dmp	family_plugx
behavioral1/memory/3004-19-0x0000000000340000-0x0000000000371000-memory.dmp	family_plugx
behavioral1/memory/3048-26-0x00000000001D0000-0x0000000000201000-memory.dmp	family_plugx
behavioral1/memory/3004-28-0x0000000000340000-0x0000000000371000-memory.dmp	family_plugx
behavioral1/memory/2948-35-0x0000000001DE0000-0x0000000001E11000-memory.dmp	family_plugx
behavioral1/memory/3048-53-0x00000000001D0000-0x0000000000201000-memory.dmp	family_plugx
behavioral1/memory/3048-49-0x00000000001D0000-0x0000000000201000-memory.dmp	family_plugx
behavioral1/memory/3048-47-0x00000000001D0000-0x0000000000201000-memory.dmp	family_plugx
behavioral1/memory/3048-48-0x00000000001D0000-0x0000000000201000-memory.dmp	family_plugx
behavioral1/memory/3048-36-0x00000000001D0000-0x0000000000201000-memory.dmp	family_plugx
behavioral1/memory/2536-66-0x00000000002C0000-0x00000000002F1000-memory.dmp	family_plugx
behavioral1/memory/2536-73-0x00000000002C0000-0x00000000002F1000-memory.dmp	family_plugx
behavioral1/memory/2536-72-0x00000000002C0000-0x00000000002F1000-memory.dmp	family_plugx
behavioral1/memory/3048-74-0x00000000001D0000-0x0000000000201000-memory.dmp	family_plugx
behavioral1/memory/2536-75-0x00000000002C0000-0x00000000002F1000-memory.dmp	family_plugx
behavioral1/memory/3048-78-0x00000000001D0000-0x0000000000201000-memory.dmp	family_plugx
behavioral1/memory/3048-79-0x00000000001D0000-0x0000000000201000-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

3048 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

RsTray.exe

pid process

3004 RsTray.exe
Loads dropped DLL 1 IoCs

Processes:

RsTray.exe

pid process

3004 RsTray.exe

pid	process
3004	RsTray.exe

pid	process
3004	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.exeRsTray.exesvchost.exemsiexec.exe

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

Modifies data under HKEY_USERS 12 IoCs

Processes:

svchost.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{ECCB368C-2ACD-4C95-8D23-3AE13CFBD4A1}\WpadDecisionReason = "1"	svchost.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{ECCB368C-2ACD-4C95-8D23-3AE13CFBD4A1}\WpadDecisionTime = 70dff2ba2a05db01	svchost.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{ECCB368C-2ACD-4C95-8D23-3AE13CFBD4A1}\WpadNetworkName = "Network 3"	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{ECCB368C-2ACD-4C95-8D23-3AE13CFBD4A1}\ce-8d-06-b5-65-54	svchost.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\ce-8d-06-b5-65-54\WpadDecisionReason = "1"	svchost.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\ce-8d-06-b5-65-54\WpadDecision = "0"	svchost.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\ce-8d-06-b5-65-54\WpadDetectedUrl	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{ECCB368C-2ACD-4C95-8D23-3AE13CFBD4A1}	svchost.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{ECCB368C-2ACD-4C95-8D23-3AE13CFBD4A1}\WpadDecision = "0"	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\ce-8d-06-b5-65-54	svchost.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\ce-8d-06-b5-65-54\WpadDecisionTime = 70dff2ba2a05db01	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	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 = 35003800380044004200350036003000460032003900300032003800330042000000	svchost.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

svchost.exemsiexec.exe

pid	process
3048	svchost.exe
3048	svchost.exe
3048	svchost.exe
3048	svchost.exe
3048	svchost.exe
3048	svchost.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
3048	svchost.exe
3048	svchost.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
3048	svchost.exe
3048	svchost.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
3048	svchost.exe
3048	svchost.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
3048	svchost.exe
3048	svchost.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe
2536	msiexec.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

Processes:

svchost.exemsiexec.exe

pid process

3048 svchost.exe
2536 msiexec.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

Processes:

RsTray.exeRsTray.exesvchost.exemsiexec.exe

description	pid	process
Token: SeDebugPrivilege	2948	RsTray.exe
Token: SeTcbPrivilege	2948	RsTray.exe
Token: SeDebugPrivilege	3004	RsTray.exe
Token: SeTcbPrivilege	3004	RsTray.exe
Token: SeDebugPrivilege	3048	svchost.exe
Token: SeTcbPrivilege	3048	svchost.exe
Token: SeDebugPrivilege	2536	msiexec.exe
Token: SeTcbPrivilege	2536	msiexec.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

RsTray.exesvchost.exe

description	pid	process	target process
PID 3004 wrote to memory of 3048	3004	RsTray.exe	svchost.exe
PID 3004 wrote to memory of 3048	3004	RsTray.exe	svchost.exe
PID 3004 wrote to memory of 3048	3004	RsTray.exe	svchost.exe
PID 3004 wrote to memory of 3048	3004	RsTray.exe	svchost.exe
PID 3004 wrote to memory of 3048	3004	RsTray.exe	svchost.exe
PID 3004 wrote to memory of 3048	3004	RsTray.exe	svchost.exe
PID 3004 wrote to memory of 3048	3004	RsTray.exe	svchost.exe
PID 3004 wrote to memory of 3048	3004	RsTray.exe	svchost.exe
PID 3004 wrote to memory of 3048	3004	RsTray.exe	svchost.exe
PID 3048 wrote to memory of 2536	3048	svchost.exe	msiexec.exe
PID 3048 wrote to memory of 2536	3048	svchost.exe	msiexec.exe
PID 3048 wrote to memory of 2536	3048	svchost.exe	msiexec.exe
PID 3048 wrote to memory of 2536	3048	svchost.exe	msiexec.exe
PID 3048 wrote to memory of 2536	3048	svchost.exe	msiexec.exe
PID 3048 wrote to memory of 2536	3048	svchost.exe	msiexec.exe
PID 3048 wrote to memory of 2536	3048	svchost.exe	msiexec.exe
PID 3048 wrote to memory of 2536	3048	svchost.exe	msiexec.exe
PID 3048 wrote to memory of 2536	3048	svchost.exe	msiexec.exe
PID 3048 wrote to memory of 2536	3048	svchost.exe	msiexec.exe
PID 3048 wrote to memory of 2536	3048	svchost.exe	msiexec.exe
PID 3048 wrote to memory of 2536	3048	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:2948

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:3004
- 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:3048
- - C:\Windows\SysWOW64\msiexec.exe
    C:\Windows\system32\msiexec.exe 209 3048
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    PID:2536

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

Filesize
2KB

MD5
6d54b4f07a1b92bd6fafe7160b2c887c

SHA1
6bf4a36e729a2c4156b1280db97252ba8ea7d9b4

SHA256
653fe0ab7b634e50ba09f962c6357bcf76ce633768aa41dd01d1a93ef83a0a54

SHA512
32c57ca7ce437fc7712948a6f30733112830ff570d89ca903e5a5bdec43277a19a453df8c027e0835ad1dff2f7927cf973e33efa1847ed608cb6eb534d8163a3

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
782B

MD5
a6867dd99428722d3f814601082c0e29

SHA1
690746c6c9622fc188fd115a8627cc435747a28a

SHA256
116916cd4346fc94ac2c785b64077527defb80be59090ce5fbfaee8716374071

SHA512
9264ee43457c168046e73f08a788686f2b7a78f1eca36b2b002f7b7aad24b39e383195861ccefe16143e4306cdf6a794c75287d9c72c9682cf493a21e356bc82

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

Filesize
1KB

MD5
230800a41ca47fe983c23b3fd6cc75c7

SHA1
93c3b7029384f81437334eb7b98485a5c7408acc

SHA256
5c602b5d7aa272d4803a3dba6e73082d39728831c2f9c2930314ffef962f53c0

SHA512
cf271e74de9184086280855a2d478496e79eda914738edbb74e14a9fa02413dac953028171cc7e8f21044b29bdc1c76eb7a73f74d09808982c81d4c9d9bef7ae

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

Filesize
1KB

MD5
8fbed73bbccf2de04e92c67cfe395d2a

SHA1
391e3dc99feb62811af2c4f67dfddd6715f6424a

SHA256
7e26ac0ee46294946dcec627412282a8ff459be3db2778dba15e834a46bfc599

SHA512
9ca0bc9137d3c02c118a4becfa83119b9e36d580ce12d44639f4407e15fdf57cf154d07b96829de835fc1cb4d0d194abd38aeca0191a9b5e1d8e77873b6c0c07

Download Submit
memory/2536-75-0x00000000002C0000-0x00000000002F1000-memory.dmp

Filesize
196KB

Download
memory/2536-66-0x00000000002C0000-0x00000000002F1000-memory.dmp

Filesize
196KB

Download
memory/2536-71-0x0000000000070000-0x0000000000071000-memory.dmp

Filesize
4KB

Download
memory/2536-72-0x00000000002C0000-0x00000000002F1000-memory.dmp

Filesize
196KB

Download
memory/2536-73-0x00000000002C0000-0x00000000002F1000-memory.dmp

Filesize
196KB

Download
memory/2536-65-0x0000000000110000-0x0000000000111000-memory.dmp

Filesize
4KB

Download
memory/2948-1-0x0000000001DE0000-0x0000000001E11000-memory.dmp

Filesize
196KB

Download
memory/2948-35-0x0000000001DE0000-0x0000000001E11000-memory.dmp

Filesize
196KB

Download
memory/2948-0-0x0000000001C80000-0x0000000001D80000-memory.dmp

Filesize
1024KB

Download
memory/3004-19-0x0000000000340000-0x0000000000371000-memory.dmp

Filesize
196KB

Download
memory/3004-28-0x0000000000340000-0x0000000000371000-memory.dmp

Filesize
196KB

Download
memory/3048-23-0x00000000000A0000-0x00000000000BD000-memory.dmp

Filesize
116KB

Download
memory/3048-48-0x00000000001D0000-0x0000000000201000-memory.dmp

Filesize
196KB

Download
memory/3048-36-0x00000000001D0000-0x0000000000201000-memory.dmp

Filesize
196KB

Download
memory/3048-46-0x0000000000020000-0x0000000000021000-memory.dmp

Filesize
4KB

Download
memory/3048-47-0x00000000001D0000-0x0000000000201000-memory.dmp

Filesize
196KB

Download
memory/3048-49-0x00000000001D0000-0x0000000000201000-memory.dmp

Filesize
196KB

Download
memory/3048-53-0x00000000001D0000-0x0000000000201000-memory.dmp

Filesize
196KB

Download
memory/3048-26-0x00000000001D0000-0x0000000000201000-memory.dmp

Filesize
196KB

Download
memory/3048-21-0x0000000000080000-0x0000000000081000-memory.dmp

Filesize
4KB

Download
memory/3048-74-0x00000000001D0000-0x0000000000201000-memory.dmp

Filesize
196KB

Download
memory/3048-25-0x0000000000080000-0x0000000000081000-memory.dmp

Filesize
4KB

Download
memory/3048-24-0x00000000000C0000-0x00000000000C2000-memory.dmp

Filesize
8KB

Download
memory/3048-78-0x00000000001D0000-0x0000000000201000-memory.dmp

Filesize
196KB

Download
memory/3048-79-0x00000000001D0000-0x0000000000201000-memory.dmp

Filesize
196KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads