orcus | 90fb58399388db6e22f44e41a7c2d25e61f7ae9565b8a1b775e10a3dee0fb7ea

Analysis

max time kernel
126s
max time network
126s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
01-08-2024 20:25

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General

Target

Nursultan.exe
Size

3.4MB
MD5

0f9f82607781767d36bb032b09260847
SHA1

92996f91d7ed53466dd3edc6c543d5b1b9e8c1cf
SHA256

90fb58399388db6e22f44e41a7c2d25e61f7ae9565b8a1b775e10a3dee0fb7ea
SHA512

033bd502642c0f0fb89e8399aee7ca5027cb5a19530ca9f88b9594e7404faec78b7a3eaeced5cf2ff4fa5ae5c74da148cbbacabc657f9b6f70bfe073e63e6123
SSDEEP

49152:5GX87p1EZKMnkmWg8LX5prviYDyKS5AypQxbRQAo9JnCmpKu/nRFfjI7L0qbq:5LHTPJg8z1mKnypSbRxo9JCmD

Score

10^/10

orcus nursultan credential_access discovery rat spyware stealer

Malware Config

Extracted

Family

orcus

Botnet

Nursultan

31.44.184.52:54370

Mutex

sudo_jdu3yd4dgo4y8e1pp6azrvrqmxk9e5mb

Attributes

autostart_method
Disable
enable_keylogger
false
install_path
%appdata%\linecdnimage\secureuploads.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 main payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/files/0x00070000000186de-10.dat	family_orcus

Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Orcurs Rat Executable 11 IoCs

Processes:

resource	yara_rule
behavioral1/memory/836-1-0x00000000001B0000-0x0000000000518000-memory.dmp	orcus
behavioral1/files/0x00070000000186de-10.dat	orcus
behavioral1/memory/2524-18-0x0000000000310000-0x0000000000678000-memory.dmp	orcus
behavioral1/memory/2820-31-0x0000000000400000-0x0000000000768000-memory.dmp	orcus
behavioral1/memory/2820-33-0x0000000000400000-0x0000000000768000-memory.dmp	orcus
behavioral1/memory/2820-28-0x0000000000400000-0x0000000000768000-memory.dmp	orcus
behavioral1/memory/2820-26-0x0000000000400000-0x0000000000768000-memory.dmp	orcus
behavioral1/memory/2820-32-0x0000000000400000-0x0000000000768000-memory.dmp	orcus
behavioral1/memory/2784-36-0x00000000012A0000-0x0000000001608000-memory.dmp	orcus
behavioral1/memory/2588-59-0x00000000002E0000-0x0000000000648000-memory.dmp	orcus
behavioral1/memory/2220-61-0x0000000000170000-0x00000000004D8000-memory.dmp	orcus

Executes dropped EXE 4 IoCs

Processes:

secureuploads.exesecureuploads.exesecureuploads.exesecureuploads.exe

pid	Process
2524	secureuploads.exe
2784	secureuploads.exe
2588	secureuploads.exe
2220	secureuploads.exe

Loads dropped DLL 1 IoCs

Processes:

Nursultan.exe

pid	Process
836	Nursultan.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

secureuploads.exe

description	pid	Process	procid_target
PID 2524 set thread context of 2820	2524	secureuploads.exe	32

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

Processes:

secureuploads.exesecureuploads.exesecureuploads.exeNursultan.exesecureuploads.exeinstallutil.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	secureuploads.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	secureuploads.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	secureuploads.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Nursultan.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	secureuploads.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	installutil.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

Nursultan.exesecureuploads.exeinstallutil.exe

pid	Process
836	Nursultan.exe
2524	secureuploads.exe
2524	secureuploads.exe
2820	installutil.exe
2820	installutil.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Nursultan.exesecureuploads.exeinstallutil.exe

description	pid	Process
Token: SeDebugPrivilege	836	Nursultan.exe
Token: SeDebugPrivilege	2524	secureuploads.exe
Token: SeDebugPrivilege	2820	installutil.exe

Suspicious use of WriteProcessMemory 28 IoCs

Processes:

Nursultan.exesecureuploads.exetaskeng.exe

description	pid	Process	procid_target
PID 836 wrote to memory of 2524	836	Nursultan.exe	30
PID 836 wrote to memory of 2524	836	Nursultan.exe	30
PID 836 wrote to memory of 2524	836	Nursultan.exe	30
PID 836 wrote to memory of 2524	836	Nursultan.exe	30
PID 2524 wrote to memory of 2820	2524	secureuploads.exe	32
PID 2524 wrote to memory of 2820	2524	secureuploads.exe	32
PID 2524 wrote to memory of 2820	2524	secureuploads.exe	32
PID 2524 wrote to memory of 2820	2524	secureuploads.exe	32
PID 2524 wrote to memory of 2820	2524	secureuploads.exe	32
PID 2524 wrote to memory of 2820	2524	secureuploads.exe	32
PID 2524 wrote to memory of 2820	2524	secureuploads.exe	32
PID 2524 wrote to memory of 2820	2524	secureuploads.exe	32
PID 2524 wrote to memory of 2820	2524	secureuploads.exe	32
PID 2524 wrote to memory of 2820	2524	secureuploads.exe	32
PID 2524 wrote to memory of 2820	2524	secureuploads.exe	32
PID 2524 wrote to memory of 2820	2524	secureuploads.exe	32
PID 2812 wrote to memory of 2784	2812	taskeng.exe	33
PID 2812 wrote to memory of 2784	2812	taskeng.exe	33
PID 2812 wrote to memory of 2784	2812	taskeng.exe	33
PID 2812 wrote to memory of 2784	2812	taskeng.exe	33
PID 2812 wrote to memory of 2588	2812	taskeng.exe	36
PID 2812 wrote to memory of 2588	2812	taskeng.exe	36
PID 2812 wrote to memory of 2588	2812	taskeng.exe	36
PID 2812 wrote to memory of 2588	2812	taskeng.exe	36
PID 2812 wrote to memory of 2220	2812	taskeng.exe	37
PID 2812 wrote to memory of 2220	2812	taskeng.exe	37
PID 2812 wrote to memory of 2220	2812	taskeng.exe	37
PID 2812 wrote to memory of 2220	2812	taskeng.exe	37

C:\Users\Admin\AppData\Local\Temp\Nursultan.exe
"C:\Users\Admin\AppData\Local\Temp\Nursultan.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:836
- C:\Users\Admin\AppData\Roaming\linecdnimage\secureuploads.exe
  "C:\Users\Admin\AppData\Roaming\linecdnimage\secureuploads.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:2524
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2820

C:\Windows\system32\taskeng.exe
taskeng.exe {5E9DA41D-F21E-46BE-915B-678AD61A10B1} S-1-5-21-3294248377-1418901787-4083263181-1000:FMEDFXFE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2812
- C:\Users\Admin\AppData\Roaming\linecdnimage\secureuploads.exe
  C:\Users\Admin\AppData\Roaming\linecdnimage\secureuploads.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2784
- C:\Users\Admin\AppData\Roaming\linecdnimage\secureuploads.exe
  C:\Users\Admin\AppData\Roaming\linecdnimage\secureuploads.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2588
- C:\Users\Admin\AppData\Roaming\linecdnimage\secureuploads.exe
  C:\Users\Admin\AppData\Roaming\linecdnimage\secureuploads.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2220

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Discovery

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:\Users\Admin\AppData\Local\Temp\CabC296.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Roaming\linecdnimage\secureuploads.exe.config

Filesize
357B

MD5
a2b76cea3a59fa9af5ea21ff68139c98

SHA1
35d76475e6a54c168f536e30206578babff58274

SHA256
f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

SHA512
b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

Download Submit
\Users\Admin\AppData\Roaming\linecdnimage\secureuploads.exe

Filesize
3.4MB

MD5
0f9f82607781767d36bb032b09260847

SHA1
92996f91d7ed53466dd3edc6c543d5b1b9e8c1cf

SHA256
90fb58399388db6e22f44e41a7c2d25e61f7ae9565b8a1b775e10a3dee0fb7ea

SHA512
033bd502642c0f0fb89e8399aee7ca5027cb5a19530ca9f88b9594e7404faec78b7a3eaeced5cf2ff4fa5ae5c74da148cbbacabc657f9b6f70bfe073e63e6123

Download Submit
memory/836-1-0x00000000001B0000-0x0000000000518000-memory.dmp

Filesize
3.4MB

Download
memory/836-2-0x0000000000720000-0x000000000072E000-memory.dmp

Filesize
56KB

Download
memory/836-3-0x00000000742D0000-0x00000000749BE000-memory.dmp

Filesize
6.9MB

Download
memory/836-4-0x0000000000980000-0x00000000009DC000-memory.dmp

Filesize
368KB

Download
memory/836-5-0x0000000000910000-0x0000000000922000-memory.dmp

Filesize
72KB

Download
memory/836-15-0x00000000742D0000-0x00000000749BE000-memory.dmp

Filesize
6.9MB

Download
memory/836-0-0x00000000742DE000-0x00000000742DF000-memory.dmp

Filesize
4KB

Download
memory/2220-61-0x0000000000170000-0x00000000004D8000-memory.dmp

Filesize
3.4MB

Download
memory/2524-17-0x00000000742D0000-0x00000000749BE000-memory.dmp

Filesize
6.9MB

Download
memory/2524-20-0x0000000000300000-0x0000000000312000-memory.dmp

Filesize
72KB

Download
memory/2524-21-0x0000000000E90000-0x0000000000EDE000-memory.dmp

Filesize
312KB

Download
memory/2524-18-0x0000000000310000-0x0000000000678000-memory.dmp

Filesize
3.4MB

Download
memory/2524-19-0x00000000742D0000-0x00000000749BE000-memory.dmp

Filesize
6.9MB

Download
memory/2524-34-0x00000000742D0000-0x00000000749BE000-memory.dmp

Filesize
6.9MB

Download
memory/2588-59-0x00000000002E0000-0x0000000000648000-memory.dmp

Filesize
3.4MB

Download
memory/2784-36-0x00000000012A0000-0x0000000001608000-memory.dmp

Filesize
3.4MB

Download
memory/2820-33-0x0000000000400000-0x0000000000768000-memory.dmp

Filesize
3.4MB

Download
memory/2820-26-0x0000000000400000-0x0000000000768000-memory.dmp

Filesize
3.4MB

Download
memory/2820-24-0x0000000000400000-0x0000000000768000-memory.dmp

Filesize
3.4MB

Download
memory/2820-32-0x0000000000400000-0x0000000000768000-memory.dmp

Filesize
3.4MB

Download
memory/2820-39-0x0000000000F50000-0x0000000000F60000-memory.dmp

Filesize
64KB

Download
memory/2820-38-0x0000000000B50000-0x0000000000B68000-memory.dmp

Filesize
96KB

Download
memory/2820-37-0x0000000000840000-0x0000000000852000-memory.dmp

Filesize
72KB

Download
memory/2820-28-0x0000000000400000-0x0000000000768000-memory.dmp

Filesize
3.4MB

Download
memory/2820-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2820-56-0x0000000004860000-0x000000000486E000-memory.dmp

Filesize
56KB

Download
memory/2820-57-0x0000000004A20000-0x0000000004A22000-memory.dmp

Filesize
8KB

Download
memory/2820-31-0x0000000000400000-0x0000000000768000-memory.dmp

Filesize
3.4MB

Download
memory/2820-22-0x0000000000400000-0x0000000000768000-memory.dmp

Filesize
3.4MB

Download