njrat | 3a3303bb8761484ee722c492b61c43793b64926e42bb3c90112765ae1cfe3406

General

Target

Steam.Upgreyd.exe
Size

43KB
MD5

f0aabba97f470b9a61755d9dfa2a3ff8
SHA1

059523a98fca16f9211881c2bc3d8257f6cba0ed
SHA256

3a3303bb8761484ee722c492b61c43793b64926e42bb3c90112765ae1cfe3406
SHA512

5e1b52211cdfefaedc405825ba58dade787de82d1cfe789236c6b75b9273fe6896c44151dc775397438c269ea0a8edab7b9abfccab777a22f988e3843d634825
SSDEEP

384:wZyM8Yz/wpa9GP4Uy29FDRZ448UEISFhqzIIij+ZsNO3PlpJKkkjh/TzF7pWnQ8W:2b8KR4gh29FDT4FUSQuXQ/o98U+L

Score

10^/10

njrat [email protected]discovery persistence trojan

Malware Config

Extracted

Family

njrat

Version

Njrat 0.7 Golden By Hassan Amiri

Botnet

[email protected]

C2

sayrich.ddns.net:7777

Mutex

Yandex. Update

Attributes

reg_key
Yandex. Update
splitter
|Hassan|

Signatures

Njrat family
njrat
njRAT/Bladabindi
Widely used RAT written in .NET.
trojan njrat

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Steam. update.exe	Steam.Upgreyd.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Steam. update.exe	Steam.Upgreyd.exe

Executes dropped EXE 2 IoCs

pid	Process
3564	Server.exe
3648	Server.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Yandex. Update = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Steam.Upgreyd.exe\" .."	Steam.Upgreyd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Yandex. Update = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Steam.Upgreyd.exe\" .."	Steam.Upgreyd.exe

System Location Discovery: System Language Discovery 1 TTPs 4 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	Steam.Upgreyd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Server.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Server.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
1028	schtasks.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1768	Steam.Upgreyd.exe

Suspicious use of AdjustPrivilegeToken 33 IoCs

description	pid	Process
Token: SeDebugPrivilege	1768	Steam.Upgreyd.exe
Token: 33	1768	Steam.Upgreyd.exe
Token: SeIncBasePriorityPrivilege	1768	Steam.Upgreyd.exe
Token: 33	1768	Steam.Upgreyd.exe
Token: SeIncBasePriorityPrivilege	1768	Steam.Upgreyd.exe
Token: 33	1768	Steam.Upgreyd.exe
Token: SeIncBasePriorityPrivilege	1768	Steam.Upgreyd.exe
Token: 33	1768	Steam.Upgreyd.exe
Token: SeIncBasePriorityPrivilege	1768	Steam.Upgreyd.exe
Token: 33	1768	Steam.Upgreyd.exe
Token: SeIncBasePriorityPrivilege	1768	Steam.Upgreyd.exe
Token: 33	1768	Steam.Upgreyd.exe
Token: SeIncBasePriorityPrivilege	1768	Steam.Upgreyd.exe
Token: 33	1768	Steam.Upgreyd.exe
Token: SeIncBasePriorityPrivilege	1768	Steam.Upgreyd.exe
Token: 33	1768	Steam.Upgreyd.exe
Token: SeIncBasePriorityPrivilege	1768	Steam.Upgreyd.exe
Token: 33	1768	Steam.Upgreyd.exe
Token: SeIncBasePriorityPrivilege	1768	Steam.Upgreyd.exe
Token: 33	1768	Steam.Upgreyd.exe
Token: SeIncBasePriorityPrivilege	1768	Steam.Upgreyd.exe
Token: 33	1768	Steam.Upgreyd.exe
Token: SeIncBasePriorityPrivilege	1768	Steam.Upgreyd.exe
Token: 33	1768	Steam.Upgreyd.exe
Token: SeIncBasePriorityPrivilege	1768	Steam.Upgreyd.exe
Token: 33	1768	Steam.Upgreyd.exe
Token: SeIncBasePriorityPrivilege	1768	Steam.Upgreyd.exe
Token: 33	1768	Steam.Upgreyd.exe
Token: SeIncBasePriorityPrivilege	1768	Steam.Upgreyd.exe
Token: 33	1768	Steam.Upgreyd.exe
Token: SeIncBasePriorityPrivilege	1768	Steam.Upgreyd.exe
Token: 33	1768	Steam.Upgreyd.exe
Token: SeIncBasePriorityPrivilege	1768	Steam.Upgreyd.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1768 wrote to memory of 1028	1768	Steam.Upgreyd.exe	85
PID 1768 wrote to memory of 1028	1768	Steam.Upgreyd.exe	85
PID 1768 wrote to memory of 1028	1768	Steam.Upgreyd.exe	85

C:\Users\Admin\AppData\Local\Temp\Steam.Upgreyd.exe
"C:\Users\Admin\AppData\Local\Temp\Steam.Upgreyd.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1768
- C:\Windows\SysWOW64\schtasks.exe
  schtasks /create /sc minute /mo 1 /tn Server /tr C:\Users\Admin\AppData\Local\Temp/Server.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:1028

C:\Users\Admin\AppData\Local\Temp\Server.exe
C:\Users\Admin\AppData\Local\Temp/Server.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:3564

C:\Users\Admin\AppData\Local\Temp\Server.exe
C:\Users\Admin\AppData\Local\Temp/Server.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:3648

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
507B

MD5
25d1b50e7c0d451f3d850eb54d27ca05

SHA1
a238807715c70a335f54e80d4855644b21a9e870

SHA256
650faa13e983c9046c9030f63a5fa1c33900432ec7cb3762e015da2e7c5b34a5

SHA512
4223a26b2fabefdf1c01443ccc7bd887464d27f02694379895a040c66db472d541218d501f1c01e1bd31012d079a31baf24e20882c32cf652a09a74e3bf385f5

Download Submit
C:\Users\Admin\AppData\Local\Temp\Server.exe

Filesize
43KB

MD5
f0aabba97f470b9a61755d9dfa2a3ff8

SHA1
059523a98fca16f9211881c2bc3d8257f6cba0ed

SHA256
3a3303bb8761484ee722c492b61c43793b64926e42bb3c90112765ae1cfe3406

SHA512
5e1b52211cdfefaedc405825ba58dade787de82d1cfe789236c6b75b9273fe6896c44151dc775397438c269ea0a8edab7b9abfccab777a22f988e3843d634825

Download Submit
memory/1768-10-0x0000000005190000-0x000000000519A000-memory.dmp

Filesize
40KB

Download
memory/1768-2-0x0000000004D90000-0x0000000004E2C000-memory.dmp

Filesize
624KB

Download
memory/1768-4-0x00000000051D0000-0x0000000005262000-memory.dmp

Filesize
584KB

Download
memory/1768-5-0x0000000074C70000-0x0000000075420000-memory.dmp

Filesize
7.7MB

Download
memory/1768-8-0x0000000074C7E000-0x0000000074C7F000-memory.dmp

Filesize
4KB

Download
memory/1768-9-0x0000000074C70000-0x0000000075420000-memory.dmp

Filesize
7.7MB

Download
memory/1768-0-0x0000000074C7E000-0x0000000074C7F000-memory.dmp

Filesize
4KB

Download
memory/1768-3-0x00000000056E0000-0x0000000005C84000-memory.dmp

Filesize
5.6MB

Download
memory/1768-1-0x00000000003C0000-0x00000000003D2000-memory.dmp

Filesize
72KB

Download
memory/3564-14-0x0000000074C70000-0x0000000075420000-memory.dmp

Filesize
7.7MB

Download
memory/3564-16-0x0000000074C70000-0x0000000075420000-memory.dmp

Filesize
7.7MB

Download
memory/3564-13-0x0000000074C70000-0x0000000075420000-memory.dmp

Filesize
7.7MB

Download
memory/3648-18-0x0000000074C70000-0x0000000075420000-memory.dmp

Filesize
7.7MB

Download
memory/3648-20-0x0000000074C70000-0x0000000075420000-memory.dmp

Filesize
7.7MB

Download
memory/3648-21-0x0000000074C70000-0x0000000075420000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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