orcus | 790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32

General

Target

790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32.exe
Size

3.0MB
MD5

a5c760e458503463ed3902bdbf605e4e
SHA1

2fb83c914783070267e42dbad89fd2c7afc9d9af
SHA256

790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32
SHA512

5b905facc4db2afb1dec0460b965c705c2566d91e2db7a95bc23cbd7dc8cbdb9414d4b4a6306e7a57d5ff4eb658910f12497608d5442cc5d8c740dc5be446b5b
SSDEEP

49152:XP7p1EZKMnkmWg8LX5prviYDyKS5AypQxbRQAo9JnCmpiu/nRFfjI7L0qb:XPHTPJg8z1mKnypSbRxo9JCm

Score

10^/10

orcus mamont discovery rat spyware stealer

Malware Config

Extracted

Family

orcus

Botnet

Mamont

C2

31.44.184.52:38135

Mutex

sudo_hukjod904skbxj09l4njrec7guj3gu0r

Attributes

autostart_method
Disable
enable_keylogger
false
install_path
C:\ProgramData\$77RegAsm.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/0x000c000000023b4f-13.dat	family_orcus

Orcurs Rat Executable 2 IoCs

resource	yara_rule
behavioral2/memory/1920-1-0x0000000000980000-0x0000000000C7E000-memory.dmp	orcus
behavioral2/files/0x000c000000023b4f-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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32.exe

Executes dropped EXE 4 IoCs

pid	Process
4692	$77RegAsm.exe
1136	$77RegAsm.exe
3536	$77RegAsm.exe
4744	$77RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4692 set thread context of 1300	4692	$77RegAsm.exe	87

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	$77RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	$77RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	$77RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	$77RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	caspol.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1920	790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32.exe
4692	$77RegAsm.exe
4692	$77RegAsm.exe
4692	$77RegAsm.exe
4692	$77RegAsm.exe
4692	$77RegAsm.exe
4692	$77RegAsm.exe
1300	caspol.exe
1300	caspol.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1920	790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32.exe
Token: SeDebugPrivilege	4692	$77RegAsm.exe
Token: SeDebugPrivilege	1300	caspol.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1920 wrote to memory of 4692	1920	790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32.exe	83
PID 1920 wrote to memory of 4692	1920	790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32.exe	83
PID 1920 wrote to memory of 4692	1920	790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32.exe	83
PID 4692 wrote to memory of 4340	4692	$77RegAsm.exe	85
PID 4692 wrote to memory of 4340	4692	$77RegAsm.exe	85
PID 4692 wrote to memory of 4340	4692	$77RegAsm.exe	85
PID 4692 wrote to memory of 2024	4692	$77RegAsm.exe	86
PID 4692 wrote to memory of 2024	4692	$77RegAsm.exe	86
PID 4692 wrote to memory of 2024	4692	$77RegAsm.exe	86
PID 4692 wrote to memory of 1300	4692	$77RegAsm.exe	87
PID 4692 wrote to memory of 1300	4692	$77RegAsm.exe	87
PID 4692 wrote to memory of 1300	4692	$77RegAsm.exe	87
PID 4692 wrote to memory of 1300	4692	$77RegAsm.exe	87
PID 4692 wrote to memory of 1300	4692	$77RegAsm.exe	87
PID 4692 wrote to memory of 1300	4692	$77RegAsm.exe	87
PID 4692 wrote to memory of 1300	4692	$77RegAsm.exe	87
PID 4692 wrote to memory of 1300	4692	$77RegAsm.exe	87

C:\Users\Admin\AppData\Local\Temp\790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32.exe
"C:\Users\Admin\AppData\Local\Temp\790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1920
- C:\ProgramData\$77RegAsm.exe
  "C:\ProgramData\$77RegAsm.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:4692
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"
    3⤵
    PID:4340
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"
    3⤵
    PID:2024
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1300

C:\ProgramData\$77RegAsm.exe
C:\ProgramData\$77RegAsm.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:1136

C:\ProgramData\$77RegAsm.exe
C:\ProgramData\$77RegAsm.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:3536

C:\ProgramData\$77RegAsm.exe
C:\ProgramData\$77RegAsm.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:4744

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\ProgramData\$77RegAsm.exe

Filesize
3.0MB

MD5
a5c760e458503463ed3902bdbf605e4e

SHA1
2fb83c914783070267e42dbad89fd2c7afc9d9af

SHA256
790c0d272971a137154f73bb6cb829ac88a9fa9dceaee1e656392dc8bc1e0c32

SHA512
5b905facc4db2afb1dec0460b965c705c2566d91e2db7a95bc23cbd7dc8cbdb9414d4b4a6306e7a57d5ff4eb658910f12497608d5442cc5d8c740dc5be446b5b

Download Submit
C:\ProgramData\$77RegAsm.exe.config

Filesize
357B

MD5
a2b76cea3a59fa9af5ea21ff68139c98

SHA1
35d76475e6a54c168f536e30206578babff58274

SHA256
f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

SHA512
b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\$77RegAsm.exe.log

Filesize
1KB

MD5
663b8d5469caa4489d463aa9bc18124f

SHA1
e57123a7d969115853ea631a3b33826335025d28

SHA256
7b4fa505452f0b8ac74bb31f5a03b13342836318018fb18d224ae2ff11b1a7e8

SHA512
45e373295125a629fcc0b19609608d969c9106514918bfac5d6b8e340e407434577b825741b8fa6a043c8f3f5c1a030ba8857da5f4e8ef15a551ce3c5fe03b55

Download Submit
memory/1136-43-0x0000000075410000-0x0000000075BC0000-memory.dmp

Filesize
7.7MB

Download
memory/1136-29-0x0000000075410000-0x0000000075BC0000-memory.dmp

Filesize
7.7MB

Download
memory/1300-45-0x0000000007670000-0x000000000777A000-memory.dmp

Filesize
1.0MB

Download
memory/1300-44-0x00000000074E0000-0x000000000752C000-memory.dmp

Filesize
304KB

Download
memory/1300-42-0x00000000074A0000-0x00000000074DC000-memory.dmp

Filesize
240KB

Download
memory/1300-34-0x0000000005DD0000-0x0000000005DE8000-memory.dmp

Filesize
96KB

Download
memory/1300-46-0x0000000007FE0000-0x00000000081A2000-memory.dmp

Filesize
1.8MB

Download
memory/1300-41-0x0000000007440000-0x0000000007452000-memory.dmp

Filesize
72KB

Download
memory/1300-40-0x00000000079C0000-0x0000000007FD8000-memory.dmp

Filesize
6.1MB

Download
memory/1300-39-0x0000000007330000-0x0000000007396000-memory.dmp

Filesize
408KB

Download
memory/1300-36-0x0000000006A90000-0x0000000006A9A000-memory.dmp

Filesize
40KB

Download
memory/1300-35-0x0000000005E00000-0x0000000005E10000-memory.dmp

Filesize
64KB

Download
memory/1300-47-0x0000000007620000-0x000000000762E000-memory.dmp

Filesize
56KB

Download
memory/1300-48-0x0000000008200000-0x0000000008250000-memory.dmp

Filesize
320KB

Download
memory/1920-7-0x0000000005750000-0x0000000005762000-memory.dmp

Filesize
72KB

Download
memory/1920-4-0x0000000005770000-0x00000000057CC000-memory.dmp

Filesize
368KB

Download
memory/1920-1-0x0000000000980000-0x0000000000C7E000-memory.dmp

Filesize
3.0MB

Download
memory/1920-2-0x0000000002E20000-0x0000000002E2E000-memory.dmp

Filesize
56KB

Download
memory/1920-3-0x0000000075410000-0x0000000075BC0000-memory.dmp

Filesize
7.7MB

Download
memory/1920-6-0x00000000058C0000-0x0000000005952000-memory.dmp

Filesize
584KB

Download
memory/1920-22-0x0000000075410000-0x0000000075BC0000-memory.dmp

Filesize
7.7MB

Download
memory/1920-0-0x000000007541E000-0x000000007541F000-memory.dmp

Filesize
4KB

Download
memory/1920-5-0x0000000005E70000-0x0000000006414000-memory.dmp

Filesize
5.6MB

Download
memory/4692-24-0x0000000075410000-0x0000000075BC0000-memory.dmp

Filesize
7.7MB

Download
memory/4692-33-0x0000000075410000-0x0000000075BC0000-memory.dmp

Filesize
7.7MB

Download
memory/4692-25-0x0000000075410000-0x0000000075BC0000-memory.dmp

Filesize
7.7MB

Download
memory/4692-26-0x0000000005BB0000-0x0000000005BFE000-memory.dmp

Filesize
312KB

Download
memory/4692-28-0x00000000064F0000-0x000000000658C000-memory.dmp

Filesize
624KB

Download

Analysis

Sharing