njrat | 4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779

General

Target

4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe
Size

96KB
MD5

2ca52f3cc07363063db01a026b273a80
SHA1

a8428bf7a28e6c8daad18d4604c22ad4fe4eedf2
SHA256

4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779
SHA512

d9efc481fd07fc7bed353dfdb472b5ed06a64a64f60263380bc66ff5cfcbb8a16bbab0fec12e825e4d6d5765ba8be0f73ded53bf338cf85615c29e920502d700
SSDEEP

1536:r1/F8CpxMCAgF9DLi+DOGL2NJJhVHYb9:JH2+DOGKJvs9

Score

10^/10

njrat hkrooz evasion persistence trojan

Malware Config

Extracted

Family

njrat

Version

0.6.4

Botnet

hkrooz

C2

hkrooz.no-ip.biz:999

Mutex

75b91df45b7ea5f1132228db5d247dde

Attributes

reg_key
75b91df45b7ea5f1132228db5d247dde
splitter
|'|'|

Signatures

njRAT/Bladabindi
Widely used RAT written in .NET.
trojan njrat
Executes dropped EXE 2 IoCs

Processes:

system32.exesystem32.exe

pid process

3360 system32.exe
1448 system32.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

2948 netsh.exe

pid	process
3360	system32.exe
1448	system32.exe

pid	process
2948	netsh.exe

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

Processes:

4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe

Drops startup file 2 IoCs

Processes:

system32.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\75b91df45b7ea5f1132228db5d247dde.exe	system32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\75b91df45b7ea5f1132228db5d247dde.exe	system32.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

system32.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\75b91df45b7ea5f1132228db5d247dde = "\"C:\\Users\\Admin\\system32.exe\" .."	system32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\75b91df45b7ea5f1132228db5d247dde = "\"C:\\Users\\Admin\\system32.exe\" .."	system32.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exesystem32.exe

description	pid	process	target process
PID 4980 set thread context of 1176	4980	4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe	4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe
PID 3360 set thread context of 1448	3360	system32.exe	system32.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 45 IoCs

Processes:

system32.exe

pid	process
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe
1448	system32.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exesystem32.exesystem32.exe

description	pid	process
Token: SeDebugPrivilege	4980	4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe
Token: SeDebugPrivilege	3360	system32.exe
Token: SeDebugPrivilege	1448	system32.exe

Suspicious use of WriteProcessMemory 22 IoCs

Processes:

4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exesystem32.exesystem32.exe

description	pid	process	target process
PID 4980 wrote to memory of 1176	4980	4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe	4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe
PID 4980 wrote to memory of 1176	4980	4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe	4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe
PID 4980 wrote to memory of 1176	4980	4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe	4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe
PID 4980 wrote to memory of 1176	4980	4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe	4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe
PID 4980 wrote to memory of 1176	4980	4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe	4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe
PID 4980 wrote to memory of 1176	4980	4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe	4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe
PID 4980 wrote to memory of 1176	4980	4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe	4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe
PID 4980 wrote to memory of 1176	4980	4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe	4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe
PID 1176 wrote to memory of 3360	1176	4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe	system32.exe
PID 1176 wrote to memory of 3360	1176	4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe	system32.exe
PID 1176 wrote to memory of 3360	1176	4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe	system32.exe
PID 3360 wrote to memory of 1448	3360	system32.exe	system32.exe
PID 3360 wrote to memory of 1448	3360	system32.exe	system32.exe
PID 3360 wrote to memory of 1448	3360	system32.exe	system32.exe
PID 3360 wrote to memory of 1448	3360	system32.exe	system32.exe
PID 3360 wrote to memory of 1448	3360	system32.exe	system32.exe
PID 3360 wrote to memory of 1448	3360	system32.exe	system32.exe
PID 3360 wrote to memory of 1448	3360	system32.exe	system32.exe
PID 3360 wrote to memory of 1448	3360	system32.exe	system32.exe
PID 1448 wrote to memory of 2948	1448	system32.exe	netsh.exe
PID 1448 wrote to memory of 2948	1448	system32.exe	netsh.exe
PID 1448 wrote to memory of 2948	1448	system32.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe
"C:\Users\Admin\AppData\Local\Temp\4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4980

C:\Users\Admin\AppData\Local\Temp\4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe
C:\Users\Admin\AppData\Local\Temp\4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe
2⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1176

C:\Users\Admin\system32.exe
"C:\Users\Admin\system32.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3360

C:\Users\Admin\system32.exe
C:\Users\Admin\system32.exe
4⤵
- Executes dropped EXE
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1448

C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\system32.exe" "system32.exe" ENABLE
5⤵
- Modifies Windows Firewall
PID:2948

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779.exe.log
Filesize
319B

MD5
91046f2e147049d3e53cd9bf9d4d95ed

SHA1
228e347d062840b2edcbd16904475aacad414c62

SHA256
ea92f8291b86440b98162409b1f9f04470455c22be01a1480ea5ebc37eb168dc

SHA512
071a9c6e17760a726c3a4519cf8006f36f17f50946af0129e0e1f3e480f6b7fcc804a7614b044247f2420a8b2b46bec5b8493e4869bb918bc7c0f6aa1346c3e0

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\system32.exe.log
Filesize
319B

MD5
91046f2e147049d3e53cd9bf9d4d95ed

SHA1
228e347d062840b2edcbd16904475aacad414c62

SHA256
ea92f8291b86440b98162409b1f9f04470455c22be01a1480ea5ebc37eb168dc

SHA512
071a9c6e17760a726c3a4519cf8006f36f17f50946af0129e0e1f3e480f6b7fcc804a7614b044247f2420a8b2b46bec5b8493e4869bb918bc7c0f6aa1346c3e0

Download Submit
C:\Users\Admin\system32.exe
Filesize
96KB

MD5
2ca52f3cc07363063db01a026b273a80

SHA1
a8428bf7a28e6c8daad18d4604c22ad4fe4eedf2

SHA256
4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779

SHA512
d9efc481fd07fc7bed353dfdb472b5ed06a64a64f60263380bc66ff5cfcbb8a16bbab0fec12e825e4d6d5765ba8be0f73ded53bf338cf85615c29e920502d700

Download Submit
C:\Users\Admin\system32.exe
Filesize
96KB

MD5
2ca52f3cc07363063db01a026b273a80

SHA1
a8428bf7a28e6c8daad18d4604c22ad4fe4eedf2

SHA256
4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779

SHA512
d9efc481fd07fc7bed353dfdb472b5ed06a64a64f60263380bc66ff5cfcbb8a16bbab0fec12e825e4d6d5765ba8be0f73ded53bf338cf85615c29e920502d700

Download Submit
C:\Users\Admin\system32.exe
Filesize
96KB

MD5
2ca52f3cc07363063db01a026b273a80

SHA1
a8428bf7a28e6c8daad18d4604c22ad4fe4eedf2

SHA256
4c9712069db7e8568caed8023e3742676cc7aecda48ac6f2422ad6fefdd8c779

SHA512
d9efc481fd07fc7bed353dfdb472b5ed06a64a64f60263380bc66ff5cfcbb8a16bbab0fec12e825e4d6d5765ba8be0f73ded53bf338cf85615c29e920502d700

Download Submit
memory/1176-136-0x0000000074770000-0x0000000074D21000-memory.dmp

Filesize
5.7MB

Download
memory/1176-141-0x0000000074770000-0x0000000074D21000-memory.dmp

Filesize
5.7MB

Download
memory/1176-134-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1176-133-0x0000000000000000-mapping.dmp

Download
memory/1448-142-0x0000000000000000-mapping.dmp

Download
memory/1448-148-0x0000000074770000-0x0000000074D21000-memory.dmp

Filesize
5.7MB

Download
memory/1448-149-0x0000000074770000-0x0000000074D21000-memory.dmp

Filesize
5.7MB

Download
memory/2948-147-0x0000000000000000-mapping.dmp

Download
memory/3360-137-0x0000000000000000-mapping.dmp

Download
memory/3360-146-0x0000000074770000-0x0000000074D21000-memory.dmp

Filesize
5.7MB

Download
memory/4980-132-0x0000000074770000-0x0000000074D21000-memory.dmp

Filesize
5.7MB

Download
memory/4980-135-0x0000000074770000-0x0000000074D21000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads