orcus | 83ac16bba801faed474b5c2bdd3580f0a71f06d4ac1137dd7469ef0304e268a4

General

Target

83ac16bba801faed474b5c2bdd3580f0a71f06d4ac1137dd7469ef0304e268a4.exe
Size

3.0MB
MD5

ac76227a45da223c1248bfba2e0a05a5
SHA1

f6666bdab8dfa1b9fe2e868f009eaeb53b94e075
SHA256

83ac16bba801faed474b5c2bdd3580f0a71f06d4ac1137dd7469ef0304e268a4
SHA512

6cb7710f318d5b825bf70aa8e295ef1685d99ec014940c43866380615ab96e0e26941f15363c2f5723bd82d49c239d0ae57297f9f84722e616052c216e126c84
SSDEEP

49152:ZGX87p1EZKMnkmWg8LX5prviYDyKS5AypQxbRQAo9JnCmpKu/nRFfjI7L0qb:ZLHTPJg8z1mKnypSbRxo9JCm

Score

10^/10

orcus solara discovery rat spyware stealer

Malware Config

Extracted

Family

orcus

Botnet

Solara

C2

31.44.184.52:61350

Mutex

sudo_j5pcejzfqw2c1rqa7jo5gb6vecolgm7g

Attributes

autostart_method
Disable
enable_keylogger
false
install_path
%appdata%\serverphpapi\multiauth.exe
reconnect_delay
10000
registry_keyname
Sudik
taskscheduler_taskname
sudik
watchdog_path
AppData\aga.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
behavioral2/files/0x000b000000023b8f-13.dat	family_orcus

Orcurs Rat Executable 2 IoCs

resource	yara_rule
behavioral2/memory/4036-1-0x0000000000330000-0x000000000062E000-memory.dmp	orcus
behavioral2/files/0x000b000000023b8f-13.dat	orcus

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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	83ac16bba801faed474b5c2bdd3580f0a71f06d4ac1137dd7469ef0304e268a4.exe

Executes dropped EXE 4 IoCs

pid	Process
4760	multiauth.exe
2364	multiauth.exe
3112	multiauth.exe
2808	multiauth.exe

Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
spyware stealer

Data from Local System
T1005

Credentials in Registry
T1552.002
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4760 set thread context of 3616	4760	multiauth.exe	89

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 6 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	multiauth.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	multiauth.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	83ac16bba801faed474b5c2bdd3580f0a71f06d4ac1137dd7469ef0304e268a4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	multiauth.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regasm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	multiauth.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
4036	83ac16bba801faed474b5c2bdd3580f0a71f06d4ac1137dd7469ef0304e268a4.exe
4760	multiauth.exe
4760	multiauth.exe
3616	regasm.exe
3616	regasm.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4036	83ac16bba801faed474b5c2bdd3580f0a71f06d4ac1137dd7469ef0304e268a4.exe
Token: SeDebugPrivilege	4760	multiauth.exe
Token: SeDebugPrivilege	3616	regasm.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 4036 wrote to memory of 4760	4036	83ac16bba801faed474b5c2bdd3580f0a71f06d4ac1137dd7469ef0304e268a4.exe	87
PID 4036 wrote to memory of 4760	4036	83ac16bba801faed474b5c2bdd3580f0a71f06d4ac1137dd7469ef0304e268a4.exe	87
PID 4036 wrote to memory of 4760	4036	83ac16bba801faed474b5c2bdd3580f0a71f06d4ac1137dd7469ef0304e268a4.exe	87
PID 4760 wrote to memory of 3616	4760	multiauth.exe	89
PID 4760 wrote to memory of 3616	4760	multiauth.exe	89
PID 4760 wrote to memory of 3616	4760	multiauth.exe	89
PID 4760 wrote to memory of 3616	4760	multiauth.exe	89
PID 4760 wrote to memory of 3616	4760	multiauth.exe	89
PID 4760 wrote to memory of 3616	4760	multiauth.exe	89
PID 4760 wrote to memory of 3616	4760	multiauth.exe	89
PID 4760 wrote to memory of 3616	4760	multiauth.exe	89

C:\Users\Admin\AppData\Local\Temp\83ac16bba801faed474b5c2bdd3580f0a71f06d4ac1137dd7469ef0304e268a4.exe
"C:\Users\Admin\AppData\Local\Temp\83ac16bba801faed474b5c2bdd3580f0a71f06d4ac1137dd7469ef0304e268a4.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4036
- C:\Users\Admin\AppData\Roaming\serverphpapi\multiauth.exe
  "C:\Users\Admin\AppData\Roaming\serverphpapi\multiauth.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4760
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3616

C:\Users\Admin\AppData\Roaming\serverphpapi\multiauth.exe
C:\Users\Admin\AppData\Roaming\serverphpapi\multiauth.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:2364

C:\Users\Admin\AppData\Roaming\serverphpapi\multiauth.exe
C:\Users\Admin\AppData\Roaming\serverphpapi\multiauth.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:3112

C:\Users\Admin\AppData\Roaming\serverphpapi\multiauth.exe
C:\Users\Admin\AppData\Roaming\serverphpapi\multiauth.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:2808

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

3

T1552

Credentials In Files

2

T1552.001

Credentials in Registry

1

T1552.002

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\multiauth.exe.log

Filesize
1KB

MD5
663b8d5469caa4489d463aa9bc18124f

SHA1
e57123a7d969115853ea631a3b33826335025d28

SHA256
7b4fa505452f0b8ac74bb31f5a03b13342836318018fb18d224ae2ff11b1a7e8

SHA512
45e373295125a629fcc0b19609608d969c9106514918bfac5d6b8e340e407434577b825741b8fa6a043c8f3f5c1a030ba8857da5f4e8ef15a551ce3c5fe03b55

Download Submit
C:\Users\Admin\AppData\Roaming\serverphpapi\multiauth.exe

Filesize
3.0MB

MD5
ac76227a45da223c1248bfba2e0a05a5

SHA1
f6666bdab8dfa1b9fe2e868f009eaeb53b94e075

SHA256
83ac16bba801faed474b5c2bdd3580f0a71f06d4ac1137dd7469ef0304e268a4

SHA512
6cb7710f318d5b825bf70aa8e295ef1685d99ec014940c43866380615ab96e0e26941f15363c2f5723bd82d49c239d0ae57297f9f84722e616052c216e126c84

Download Submit
C:\Users\Admin\AppData\Roaming\serverphpapi\multiauth.exe.config

Filesize
357B

MD5
a2b76cea3a59fa9af5ea21ff68139c98

SHA1
35d76475e6a54c168f536e30206578babff58274

SHA256
f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

SHA512
b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

Download Submit
memory/3616-45-0x0000000008000000-0x00000000081C2000-memory.dmp

Filesize
1.8MB

Download
memory/3616-44-0x0000000007620000-0x000000000772A000-memory.dmp

Filesize
1.0MB

Download
memory/3616-43-0x0000000007490000-0x00000000074DC000-memory.dmp

Filesize
304KB

Download
memory/3616-42-0x0000000007450000-0x000000000748C000-memory.dmp

Filesize
240KB

Download
memory/3616-41-0x00000000073F0000-0x0000000007402000-memory.dmp

Filesize
72KB

Download
memory/3616-46-0x00000000075E0000-0x00000000075EE000-memory.dmp

Filesize
56KB

Download
memory/3616-47-0x0000000008470000-0x00000000084C0000-memory.dmp

Filesize
320KB

Download
memory/3616-40-0x00000000079E0000-0x0000000007FF8000-memory.dmp

Filesize
6.1MB

Download
memory/3616-39-0x0000000007350000-0x00000000073B6000-memory.dmp

Filesize
408KB

Download
memory/3616-36-0x0000000006CC0000-0x0000000006CCA000-memory.dmp

Filesize
40KB

Download
memory/3616-35-0x0000000005E30000-0x0000000005E40000-memory.dmp

Filesize
64KB

Download
memory/3616-34-0x0000000005D80000-0x0000000005D98000-memory.dmp

Filesize
96KB

Download
memory/4036-7-0x00000000052A0000-0x00000000052B2000-memory.dmp

Filesize
72KB

Download
memory/4036-6-0x0000000005390000-0x0000000005422000-memory.dmp

Filesize
584KB

Download
memory/4036-1-0x0000000000330000-0x000000000062E000-memory.dmp

Filesize
3.0MB

Download
memory/4036-2-0x00000000028E0000-0x00000000028EE000-memory.dmp

Filesize
56KB

Download
memory/4036-3-0x0000000074560000-0x0000000074D10000-memory.dmp

Filesize
7.7MB

Download
memory/4036-4-0x0000000004FF0000-0x000000000504C000-memory.dmp

Filesize
368KB

Download
memory/4036-24-0x0000000074560000-0x0000000074D10000-memory.dmp

Filesize
7.7MB

Download
memory/4036-5-0x0000000005940000-0x0000000005EE4000-memory.dmp

Filesize
5.6MB

Download
memory/4036-0-0x000000007456E000-0x000000007456F000-memory.dmp

Filesize
4KB

Download
memory/4760-27-0x00000000061D0000-0x000000000621E000-memory.dmp

Filesize
312KB

Download
memory/4760-23-0x0000000074560000-0x0000000074D10000-memory.dmp

Filesize
7.7MB

Download
memory/4760-25-0x0000000074560000-0x0000000074D10000-memory.dmp

Filesize
7.7MB

Download
memory/4760-32-0x0000000074560000-0x0000000074D10000-memory.dmp

Filesize
7.7MB

Download
memory/4760-26-0x00000000061B0000-0x00000000061C2000-memory.dmp

Filesize
72KB

Download
memory/4760-29-0x0000000006B30000-0x0000000006BCC000-memory.dmp

Filesize
624KB

Download

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