orcus | 5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d

Analysis

max time kernel
149s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
24-12-2024 01:07

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General

Target

5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe
Size

924KB
MD5

62d70f8671fd2008fc9f0e17d57d809c
SHA1

8b743631a6ea12f7c00a3b586ebdc4e81d0cd892
SHA256

5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d
SHA512

58bf0a6e47079c3d38380966ac5216249e6eadff1c4d867cf72af1becde10de3ce5e75a4b0b59e832ab4983b65f1af1cd8c855620b744c33aee3c55debee14f4
SSDEEP

24576:ZGbU4MROxnFE3idc1RlrZlI0AilFEvxHiaj:ZGbHMiudblrZlI0AilFEvxHi

Score

10^/10

orcus testbuild1 discovery persistence rat spyware stealer

Malware Config

Extracted

Family

orcus

Botnet

testbuild1

127.0.0.1:1268

Mutex

979c2ee9d7ff48d0a2e4e2df3c2c864d

Attributes

autostart_method
Registry
enable_keylogger
true
install_path
%programfiles%\Common Files\System\HD Audio\HDAudio.exe
reconnect_delay
10000
registry_keyname
HDAudioDriver
taskscheduler_taskname
HDAudioDriver
watchdog_path
AppData\HDAudioWatchdog.exe

Signatures

Orcus
Orcus is a Remote Access Trojan that is being sold on underground forums.
rat spyware stealer orcus
Orcus family
orcus

Orcus main payload 1 IoCs

resource	yara_rule
behavioral1/files/0x0008000000015f81-44.dat	family_orcus

Orcurs Rat Executable 2 IoCs

resource	yara_rule
behavioral1/files/0x0008000000015f81-44.dat	orcus
behavioral1/memory/2696-47-0x00000000008C0000-0x00000000009AE000-memory.dmp	orcus

Executes dropped EXE 6 IoCs

pid	Process
2756	WindowsInput.exe
2916	WindowsInput.exe
2696	HDAudio.exe
600	HDAudio.exe
2872	HDAudioWatchdog.exe
2880	HDAudioWatchdog.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\HDAudioDriver = "\"C:\\Program Files\\Common Files\\System\\HD Audio\\HDAudio.exe\""	HDAudio.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\WindowsInput.exe.config	5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe
File created	C:\Windows\SysWOW64\WindowsInput.InstallState	WindowsInput.exe
File created	C:\Windows\SysWOW64\WindowsInput.exe	5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\Common Files\System\HD Audio\HDAudio.exe	5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe
File created	C:\Program Files\Common Files\System\HD Audio\HDAudio.exe.config	5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe
File created	C:\Program Files\Common Files\System\HD Audio\HDAudio.exe	5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe

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 2 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	HDAudioWatchdog.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	HDAudioWatchdog.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2696	HDAudio.exe
2696	HDAudio.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2880	HDAudioWatchdog.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe
2696	HDAudio.exe
2880	HDAudioWatchdog.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2696	HDAudio.exe
Token: SeDebugPrivilege	2872	HDAudioWatchdog.exe
Token: SeDebugPrivilege	2880	HDAudioWatchdog.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2696	HDAudio.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2160 wrote to memory of 1876	2160	5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe	30
PID 2160 wrote to memory of 1876	2160	5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe	30
PID 2160 wrote to memory of 1876	2160	5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe	30
PID 1876 wrote to memory of 2472	1876	csc.exe	32
PID 1876 wrote to memory of 2472	1876	csc.exe	32
PID 1876 wrote to memory of 2472	1876	csc.exe	32
PID 2160 wrote to memory of 2756	2160	5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe	34
PID 2160 wrote to memory of 2756	2160	5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe	34
PID 2160 wrote to memory of 2756	2160	5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe	34
PID 2160 wrote to memory of 2696	2160	5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe	36
PID 2160 wrote to memory of 2696	2160	5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe	36
PID 2160 wrote to memory of 2696	2160	5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe	36
PID 1060 wrote to memory of 600	1060	taskeng.exe	38
PID 1060 wrote to memory of 600	1060	taskeng.exe	38
PID 1060 wrote to memory of 600	1060	taskeng.exe	38
PID 2696 wrote to memory of 2872	2696	HDAudio.exe	39
PID 2696 wrote to memory of 2872	2696	HDAudio.exe	39
PID 2696 wrote to memory of 2872	2696	HDAudio.exe	39
PID 2696 wrote to memory of 2872	2696	HDAudio.exe	39
PID 2872 wrote to memory of 2880	2872	HDAudioWatchdog.exe	40
PID 2872 wrote to memory of 2880	2872	HDAudioWatchdog.exe	40
PID 2872 wrote to memory of 2880	2872	HDAudioWatchdog.exe	40
PID 2872 wrote to memory of 2880	2872	HDAudioWatchdog.exe	40

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\5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe
"C:\Users\Admin\AppData\Local\Temp\5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d.exe"
1⤵
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:2160
- C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe
  "C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\i7phxfbl.cmdline"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1876
- - C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe
    C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESB07C.tmp" "c:\Users\Admin\AppData\Local\Temp\CSCB06B.tmp"
    3⤵
    PID:2472
- C:\Windows\SysWOW64\WindowsInput.exe
  "C:\Windows\SysWOW64\WindowsInput.exe" --install
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  PID:2756
- C:\Program Files\Common Files\System\HD Audio\HDAudio.exe
  "C:\Program Files\Common Files\System\HD Audio\HDAudio.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2696
- - C:\Users\Admin\AppData\Roaming\HDAudioWatchdog.exe
    "C:\Users\Admin\AppData\Roaming\HDAudioWatchdog.exe" /launchSelfAndExit "C:\Program Files\Common Files\System\HD Audio\HDAudio.exe" 2696
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2872
  - - C:\Users\Admin\AppData\Roaming\HDAudioWatchdog.exe
      "C:\Users\Admin\AppData\Roaming\HDAudioWatchdog.exe" /watchProcess "C:\Program Files\Common Files\System\HD Audio\HDAudio.exe" 2696
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2880

C:\Windows\SysWOW64\WindowsInput.exe
"C:\Windows\SysWOW64\WindowsInput.exe"
1⤵
- Executes dropped EXE
PID:2916

C:\Windows\system32\taskeng.exe
taskeng.exe {96AEB256-4D76-4A22-92D8-9646755A6DFA} S-1-5-21-1846800975-3917212583-2893086201-1000:ZQABOPWE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1060
- C:\Program Files\Common Files\System\HD Audio\HDAudio.exe
  "C:\Program Files\Common Files\System\HD Audio\HDAudio.exe"
  2⤵
  - Executes dropped EXE
  PID:600

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files\Common Files\System\HD Audio\HDAudio.exe

Filesize
924KB

MD5
62d70f8671fd2008fc9f0e17d57d809c

SHA1
8b743631a6ea12f7c00a3b586ebdc4e81d0cd892

SHA256
5420d84bccd4b32b628fa06aba8d0ad2e8da6e3c8c79a1f7ecc248033c9e4e3d

SHA512
58bf0a6e47079c3d38380966ac5216249e6eadff1c4d867cf72af1becde10de3ce5e75a4b0b59e832ab4983b65f1af1cd8c855620b744c33aee3c55debee14f4

Download Submit
C:\Users\Admin\AppData\Local\Temp\RESB07C.tmp

Filesize
1KB

MD5
2d91e4ba30bf639818fead76a577324e

SHA1
6f5fec9517819c0ff01e15e85aa0c63245d95707

SHA256
d469595b5afe784956e88eda889194bac7b2cb548fa4561e7c60ce8bfc1932af

SHA512
750ff2080d36268c4d1cc6453a5b901c4324d78e943375aead0d170de1422cf89aa42a112d11049bd9bc5bd393069f469dc322c4555e660d40aac0147faa159a

Download Submit
C:\Users\Admin\AppData\Local\Temp\i7phxfbl.dll

Filesize
76KB

MD5
a3b7819ecddaa7d3c19f2f71d4b7b366

SHA1
6ed5791302382c82e2147ba4a12dd89480b190c7

SHA256
a23b3dd273b454c8dd168f42d68f6884c643b2574b9228775723ad0e30eaedd8

SHA512
7bf990422a2f1cf2f0ab1d289c18addfea61964c531d2fedc73f07624db6bdb6713e0d7b41c61b1e552335ad83f7d4b88a11e07006eb409073db69eb9e947183

Download Submit
C:\Users\Admin\AppData\Roaming\HDAudioDriver\err_979c2ee9d7ff48d0a2e4e2df3c2c864d.dat

Filesize
1KB

MD5
0e5accb75917405f78844969109d6576

SHA1
e93f58a182fe3eb9a33a0e4f72c597b09bbc354c

SHA256
01ab4022be1f58d27bc8cb1c49fa20d39fe814c57d3a3de20cda2a32b9b30ce1

SHA512
9ce5db57a0bae8bf9218547bcd2e88c8f6b37982644ec76a6f4a63a820df6e9629570717c647ca852c3cd34ad8fe8dd75447e3a2af55c7efb760e52021d60c0d

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

Filesize
9KB

MD5
913967b216326e36a08010fb70f9dba3

SHA1
7b6f8c2eb5b443e03c212b85c2f0edb9c76ad2bf

SHA256
8d880758549220154d2ff4ee578f2b49527c5fb76a07d55237b61e30bcc09e3a

SHA512
c6fcb98d9fd509e9834fc3fba143bd36d41869cc104fbce5354951f0a6756156e34a30796baaa130dd45de3ed96e039ec14716716f6da4569915c7ef2d2b6c33

Download Submit
C:\Windows\SysWOW64\WindowsInput.exe

Filesize
21KB

MD5
e6fcf516d8ed8d0d4427f86e08d0d435

SHA1
c7691731583ab7890086635cb7f3e4c22ca5e409

SHA256
8dbe814359391ed6b0b5b182039008cf1d00964da9fbc4747f46242a95c24337

SHA512
c496cf8e2e222fe1e19051b291e6860f31aae39f54369c1c5e8c9758c4b56e8af904e3e536e743a0a6fdbbf8478afba4baee92e13fc1b3073376ac6bf4a7948e

Download Submit
C:\Windows\SysWOW64\WindowsInput.exe.config

Filesize
357B

MD5
a2b76cea3a59fa9af5ea21ff68139c98

SHA1
35d76475e6a54c168f536e30206578babff58274

SHA256
f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

SHA512
b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\CSCB06B.tmp

Filesize
676B

MD5
c17f114e81d07a0cf73de4bef595c595

SHA1
f5ded8cab4536ef77de89b7bcd1e69b6e4db55b5

SHA256
cea254aaecdd269a861147ab81b267ff214b0a42e5bd7971a9ec87b77acb1ace

SHA512
f0e3bb4e9f0fe149db5c81ffb63b3a213c37a6f2b46cab7ce5d07ee1923693fff90fd85b3f25258ef3311a3f2c5b803bd56e4a5455b4a4720126c1e44e5da3b0

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\i7phxfbl.0.cs

Filesize
208KB

MD5
250321226bbc2a616d91e1c82cb4ab2b

SHA1
7cffd0b2e9c842865d8961386ab8fcfac8d04173

SHA256
ef2707f83a0c0927cfd46b115641b9cae52a41123e4826515b9eeb561785218d

SHA512
bda59ca04cdf254f837f2cec6da55eff5c3d2af00da66537b9ebaa3601c502ae63772f082fd12663b63d537d2e03efe87a3b5746ef25e842aaf1c7d88245b4e1

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\i7phxfbl.cmdline

Filesize
349B

MD5
97d1418617ac9504b1533fbf929cd9b1

SHA1
1b30ad7570b1fa65b3c286bcdbc0abedcef1f973

SHA256
fbc1ae6afa453e03abeef2de7fba9ad68c184384dd13c82a571983e92cf6c482

SHA512
e702a310424104dc4de9d5eb88f84ce6140b1cf91e4db60de2569c5b3151c6f1bd9d5952f1d0b1d4b9001aed9f54039b77cfe82dd9cd2fc0117ad36dace17a76

Download Submit
memory/1876-17-0x000007FEF5B70000-0x000007FEF650D000-memory.dmp

Filesize
9.6MB

Download
memory/1876-10-0x000007FEF5B70000-0x000007FEF650D000-memory.dmp

Filesize
9.6MB

Download
memory/2160-22-0x0000000000610000-0x0000000000618000-memory.dmp

Filesize
32KB

Download
memory/2160-1-0x0000000001F50000-0x0000000001FAC000-memory.dmp

Filesize
368KB

Download
memory/2160-0-0x000007FEF5E2E000-0x000007FEF5E2F000-memory.dmp

Filesize
4KB

Download
memory/2160-23-0x0000000000640000-0x0000000000648000-memory.dmp

Filesize
32KB

Download
memory/2160-24-0x000007FEF5B70000-0x000007FEF650D000-memory.dmp

Filesize
9.6MB

Download
memory/2160-19-0x00000000008B0000-0x00000000008C6000-memory.dmp

Filesize
88KB

Download
memory/2160-4-0x000007FEF5B70000-0x000007FEF650D000-memory.dmp

Filesize
9.6MB

Download
memory/2160-31-0x000007FEF5B70000-0x000007FEF650D000-memory.dmp

Filesize
9.6MB

Download
memory/2160-2-0x0000000000410000-0x000000000041E000-memory.dmp

Filesize
56KB

Download
memory/2160-21-0x0000000000440000-0x0000000000452000-memory.dmp

Filesize
72KB

Download
memory/2160-3-0x000007FEF5B70000-0x000007FEF650D000-memory.dmp

Filesize
9.6MB

Download
memory/2160-48-0x000007FEF5B70000-0x000007FEF650D000-memory.dmp

Filesize
9.6MB

Download
memory/2696-47-0x00000000008C0000-0x00000000009AE000-memory.dmp

Filesize
952KB

Download
memory/2696-51-0x0000000000870000-0x00000000008BE000-memory.dmp

Filesize
312KB

Download
memory/2696-52-0x0000000002270000-0x0000000002288000-memory.dmp

Filesize
96KB

Download
memory/2696-53-0x00000000022A0000-0x00000000022B0000-memory.dmp

Filesize
64KB

Download
memory/2756-34-0x0000000000F60000-0x0000000000F6C000-memory.dmp

Filesize
48KB

Download
memory/2872-63-0x00000000013A0000-0x00000000013A8000-memory.dmp

Filesize
32KB

Download
memory/2916-38-0x0000000001320000-0x000000000132C000-memory.dmp

Filesize
48KB

Download