orcus | 98cf24d2820d87e587ce0073fb303066192dede2b2a3b319f9d15d7949a25eab

Analysis

max time kernel
149s
max time network
199s
platform
windows7_x64
resource
win7v20210408
submitted
29-06-2021 06:11

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General

Target

98cf24d2820d87e587ce0073fb303066192dede2b2a3b319f9d15d7949a25eab.exe
Size

1.3MB
MD5

fb71ff3ffdd50950d58e5d74f0cb4d36
SHA1

fd0882a725e4ade9b3d5a75a0f1cde65cfb16961
SHA256

98cf24d2820d87e587ce0073fb303066192dede2b2a3b319f9d15d7949a25eab
SHA512

fc594764ffc45d83907c2aaefb76290803f16c341501784e3d716825d613ec95e469da44954b1beac47d8c1d3ffc6f1bff8cbf21b3766a942a29c1611b44dfbf

Score

10^/10

orcus persistence rat spyware stealer

Malware Config

Extracted

Family

orcus

178.5.71.180:80

Mutex

a4d505b115fc4401a4572b6a21933126

Attributes

autostart_method
Registry
enable_keylogger
true
install_path
%programfiles%\HD Audio\HD Audio.exe
reconnect_delay
10000
registry_keyname
Hd Audio
taskscheduler_taskname
Hd audio
watchdog_path
AppData\Yourphone.exe

Signatures

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

Orcus Main Payload 4 IoCs

resource	yara_rule
behavioral1/files/0x00030000000130c0-78.dat	family_orcus
behavioral1/files/0x00030000000130c0-80.dat	family_orcus
behavioral1/files/0x00030000000130c0-82.dat	family_orcus
behavioral1/files/0x00030000000130c0-93.dat	family_orcus

Orcurs Rat Executable 4 IoCs

resource	yara_rule
behavioral1/files/0x00030000000130c0-78.dat	orcus
behavioral1/files/0x00030000000130c0-80.dat	orcus
behavioral1/files/0x00030000000130c0-82.dat	orcus
behavioral1/files/0x00030000000130c0-93.dat	orcus

Executes dropped EXE 6 IoCs

pid	Process
868	WindowsInput.exe
624	WindowsInput.exe
2032	HD Audio.exe
1888	HD Audio.exe
1500	Yourphone.exe
1592	Yourphone.exe

Loads dropped DLL 3 IoCs

pid	Process
1988	98cf24d2820d87e587ce0073fb303066192dede2b2a3b319f9d15d7949a25eab.exe
1988	98cf24d2820d87e587ce0073fb303066192dede2b2a3b319f9d15d7949a25eab.exe
2032	HD Audio.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run\Hd Audio = "\"C:\\Program Files (x86)\\HD Audio\\HD Audio.exe\""	HD Audio.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\WindowsInput.exe	98cf24d2820d87e587ce0073fb303066192dede2b2a3b319f9d15d7949a25eab.exe
File created	C:\Windows\SysWOW64\WindowsInput.exe.config	98cf24d2820d87e587ce0073fb303066192dede2b2a3b319f9d15d7949a25eab.exe
File created	C:\Windows\SysWOW64\WindowsInput.InstallState	WindowsInput.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\HD Audio\HD Audio.exe	98cf24d2820d87e587ce0073fb303066192dede2b2a3b319f9d15d7949a25eab.exe
File opened for modification	C:\Program Files (x86)\HD Audio\HD Audio.exe	98cf24d2820d87e587ce0073fb303066192dede2b2a3b319f9d15d7949a25eab.exe
File created	C:\Program Files (x86)\HD Audio\HD Audio.exe.config	98cf24d2820d87e587ce0073fb303066192dede2b2a3b319f9d15d7949a25eab.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1592	Yourphone.exe
1592	Yourphone.exe
2032	HD Audio.exe
1592	Yourphone.exe
2032	HD Audio.exe
2032	HD Audio.exe
2032	HD Audio.exe
1592	Yourphone.exe
1592	Yourphone.exe
2032	HD Audio.exe
2032	HD Audio.exe
1592	Yourphone.exe
2032	HD Audio.exe
1592	Yourphone.exe
1592	Yourphone.exe
2032	HD Audio.exe
2032	HD Audio.exe
1592	Yourphone.exe
2032	HD Audio.exe
1592	Yourphone.exe
2032	HD Audio.exe
1592	Yourphone.exe
2032	HD Audio.exe
1592	Yourphone.exe
1592	Yourphone.exe
2032	HD Audio.exe
2032	HD Audio.exe
1592	Yourphone.exe
2032	HD Audio.exe
1592	Yourphone.exe
2032	HD Audio.exe
1592	Yourphone.exe
2032	HD Audio.exe
1592	Yourphone.exe
2032	HD Audio.exe
1592	Yourphone.exe
2032	HD Audio.exe
1592	Yourphone.exe
2032	HD Audio.exe
1592	Yourphone.exe
2032	HD Audio.exe
1592	Yourphone.exe
2032	HD Audio.exe
1592	Yourphone.exe
2032	HD Audio.exe
1592	Yourphone.exe
1592	Yourphone.exe
2032	HD Audio.exe
2032	HD Audio.exe
1592	Yourphone.exe
2032	HD Audio.exe
1592	Yourphone.exe
2032	HD Audio.exe
1592	Yourphone.exe
1592	Yourphone.exe
2032	HD Audio.exe
2032	HD Audio.exe
1592	Yourphone.exe
1592	Yourphone.exe
2032	HD Audio.exe
2032	HD Audio.exe
1592	Yourphone.exe
2032	HD Audio.exe
1592	Yourphone.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2032	HD Audio.exe
Token: SeDebugPrivilege	1500	Yourphone.exe
Token: SeDebugPrivilege	1592	Yourphone.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2032	HD Audio.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2032	HD Audio.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2032	HD Audio.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1988 wrote to memory of 868	1988	98cf24d2820d87e587ce0073fb303066192dede2b2a3b319f9d15d7949a25eab.exe	29
PID 1988 wrote to memory of 868	1988	98cf24d2820d87e587ce0073fb303066192dede2b2a3b319f9d15d7949a25eab.exe	29
PID 1988 wrote to memory of 868	1988	98cf24d2820d87e587ce0073fb303066192dede2b2a3b319f9d15d7949a25eab.exe	29
PID 1988 wrote to memory of 868	1988	98cf24d2820d87e587ce0073fb303066192dede2b2a3b319f9d15d7949a25eab.exe	29
PID 1988 wrote to memory of 2032	1988	98cf24d2820d87e587ce0073fb303066192dede2b2a3b319f9d15d7949a25eab.exe	31
PID 1988 wrote to memory of 2032	1988	98cf24d2820d87e587ce0073fb303066192dede2b2a3b319f9d15d7949a25eab.exe	31
PID 1988 wrote to memory of 2032	1988	98cf24d2820d87e587ce0073fb303066192dede2b2a3b319f9d15d7949a25eab.exe	31
PID 1988 wrote to memory of 2032	1988	98cf24d2820d87e587ce0073fb303066192dede2b2a3b319f9d15d7949a25eab.exe	31
PID 860 wrote to memory of 1888	860	taskeng.exe	33
PID 860 wrote to memory of 1888	860	taskeng.exe	33
PID 860 wrote to memory of 1888	860	taskeng.exe	33
PID 860 wrote to memory of 1888	860	taskeng.exe	33
PID 2032 wrote to memory of 1500	2032	HD Audio.exe	34
PID 2032 wrote to memory of 1500	2032	HD Audio.exe	34
PID 2032 wrote to memory of 1500	2032	HD Audio.exe	34
PID 2032 wrote to memory of 1500	2032	HD Audio.exe	34
PID 1500 wrote to memory of 1592	1500	Yourphone.exe	35
PID 1500 wrote to memory of 1592	1500	Yourphone.exe	35
PID 1500 wrote to memory of 1592	1500	Yourphone.exe	35
PID 1500 wrote to memory of 1592	1500	Yourphone.exe	35

C:\Users\Admin\AppData\Local\Temp\98cf24d2820d87e587ce0073fb303066192dede2b2a3b319f9d15d7949a25eab.exe
"C:\Users\Admin\AppData\Local\Temp\98cf24d2820d87e587ce0073fb303066192dede2b2a3b319f9d15d7949a25eab.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:1988
- C:\Windows\SysWOW64\WindowsInput.exe
  "C:\Windows\SysWOW64\WindowsInput.exe" --install
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  PID:868
- C:\Program Files (x86)\HD Audio\HD Audio.exe
  "C:\Program Files (x86)\HD Audio\HD Audio.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2032
- - C:\Users\Admin\AppData\Roaming\Yourphone.exe
    "C:\Users\Admin\AppData\Roaming\Yourphone.exe" /launchSelfAndExit "C:\Program Files (x86)\HD Audio\HD Audio.exe" 2032 /protectFile
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1500
  - - C:\Users\Admin\AppData\Roaming\Yourphone.exe
      "C:\Users\Admin\AppData\Roaming\Yourphone.exe" /watchProcess "C:\Program Files (x86)\HD Audio\HD Audio.exe" 2032 "/protectFile"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1592

C:\Windows\SysWOW64\WindowsInput.exe
"C:\Windows\SysWOW64\WindowsInput.exe"
1⤵
- Executes dropped EXE
PID:624

C:\Windows\system32\taskeng.exe
taskeng.exe {515B80A9-A6DB-43F4-B668-B38033060C6B} S-1-5-21-2455352368-1077083310-2879168483-1000:QWOCTUPM\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:860
- C:\Program Files (x86)\HD Audio\HD Audio.exe
  "C:\Program Files (x86)\HD Audio\HD Audio.exe"
  2⤵
  - Executes dropped EXE
  PID:1888

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/624-75-0x00000000002F0000-0x00000000002F1000-memory.dmp

Filesize
4KB

Download
memory/624-77-0x0000000019DA0000-0x0000000019DA2000-memory.dmp

Filesize
8KB

Download
memory/868-70-0x0000000000AD0000-0x0000000000AD1000-memory.dmp

Filesize
4KB

Download
memory/868-73-0x000000001B110000-0x000000001B112000-memory.dmp

Filesize
8KB

Download
memory/1500-104-0x00000000011C0000-0x00000000011C1000-memory.dmp

Filesize
4KB

Download
memory/1888-98-0x0000000004AD0000-0x0000000004AD1000-memory.dmp

Filesize
4KB

Download
memory/1988-61-0x00000000002B0000-0x00000000002BC000-memory.dmp

Filesize
48KB

Download
memory/1988-63-0x0000000004870000-0x0000000004871000-memory.dmp

Filesize
4KB

Download
memory/1988-62-0x00000000047C0000-0x000000000481A000-memory.dmp

Filesize
360KB

Download
memory/1988-59-0x0000000001180000-0x0000000001181000-memory.dmp

Filesize
4KB

Download
memory/1988-64-0x0000000000540000-0x0000000000550000-memory.dmp

Filesize
64KB

Download
memory/2032-91-0x0000000000E60000-0x0000000000E6C000-memory.dmp

Filesize
48KB

Download
memory/2032-90-0x0000000000CF0000-0x0000000000D05000-memory.dmp

Filesize
84KB

Download
memory/2032-89-0x0000000000D20000-0x0000000000D21000-memory.dmp

Filesize
4KB

Download
memory/2032-88-0x00000000009E0000-0x0000000000A28000-memory.dmp

Filesize
288KB

Download
memory/2032-83-0x0000000000EE0000-0x0000000000EE1000-memory.dmp

Filesize
4KB

Download
memory/2032-110-0x0000000000D25000-0x0000000000D36000-memory.dmp

Filesize
68KB

Download