njrat | 723d4e16788b240cd61087fe9b70d3f6e60117d0b7af0e242457a77541e277ce

Analysis

max time kernel
145s
max time network
151s
platform
windows7_x64
resource
win7-20230621-en
resource tags

arch:x64arch:x86image:win7-20230621-enlocale:en-usos:windows7-x64system
submitted
30/06/2023, 10:56

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General

Target

dobro.exe
Size

151KB
MD5

a443234e456bbc4a78605ab336e7d7f6
SHA1

3ce499b7866a684755ae6b38980438719bff784b
SHA256

723d4e16788b240cd61087fe9b70d3f6e60117d0b7af0e242457a77541e277ce
SHA512

4fdfb874d9db98058709ce72bb7ca8b9dad2307f168ee2aae225ecc26fec33f5c41ceaa67d61ad6617181ccb85a237283e75cb6f43a74051155ec8c0d7fdbcd1
SSDEEP

3072:klgjq8s+yJueAjVd1nut+uV2mTVDjFwkWl176jZ1hCagdgvPW:WgjqARVdRQ/vqkg1gEagdgH

Score

10^/10

njrat hacked_crosss evasion trojan

Malware Config

Extracted

Family

njrat

Version

im523

Botnet

HacKed_CrosSs

5.101.21.20:1555

Mutex

4742a84879c01b0661392ad95615a345

Attributes

reg_key
4742a84879c01b0661392ad95615a345
splitter
|'|'|

Signatures

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

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
568	netsh.exe

Executes dropped EXE 1 IoCs

pid	Process
1704	spoolsv.exe

Loads dropped DLL 1 IoCs

pid	Process
1956	dobro.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
672	taskkill.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1704	spoolsv.exe

Suspicious use of AdjustPrivilegeToken 22 IoCs

description	pid	Process
Token: SeDebugPrivilege	672	taskkill.exe
Token: SeDebugPrivilege	1704	spoolsv.exe
Token: 33	1704	spoolsv.exe
Token: SeIncBasePriorityPrivilege	1704	spoolsv.exe
Token: 33	1704	spoolsv.exe
Token: SeIncBasePriorityPrivilege	1704	spoolsv.exe
Token: 33	1704	spoolsv.exe
Token: SeIncBasePriorityPrivilege	1704	spoolsv.exe
Token: 33	1704	spoolsv.exe
Token: SeIncBasePriorityPrivilege	1704	spoolsv.exe
Token: 33	1704	spoolsv.exe
Token: SeIncBasePriorityPrivilege	1704	spoolsv.exe
Token: 33	1704	spoolsv.exe
Token: SeIncBasePriorityPrivilege	1704	spoolsv.exe
Token: 33	1704	spoolsv.exe
Token: SeIncBasePriorityPrivilege	1704	spoolsv.exe
Token: 33	1704	spoolsv.exe
Token: SeIncBasePriorityPrivilege	1704	spoolsv.exe
Token: 33	1704	spoolsv.exe
Token: SeIncBasePriorityPrivilege	1704	spoolsv.exe
Token: 33	1704	spoolsv.exe
Token: SeIncBasePriorityPrivilege	1704	spoolsv.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1956 wrote to memory of 1704	1956	dobro.exe	27
PID 1956 wrote to memory of 1704	1956	dobro.exe	27
PID 1956 wrote to memory of 1704	1956	dobro.exe	27
PID 1956 wrote to memory of 1704	1956	dobro.exe	27
PID 1704 wrote to memory of 568	1704	spoolsv.exe	28
PID 1704 wrote to memory of 568	1704	spoolsv.exe	28
PID 1704 wrote to memory of 568	1704	spoolsv.exe	28
PID 1704 wrote to memory of 568	1704	spoolsv.exe	28
PID 1704 wrote to memory of 672	1704	spoolsv.exe	29
PID 1704 wrote to memory of 672	1704	spoolsv.exe	29
PID 1704 wrote to memory of 672	1704	spoolsv.exe	29
PID 1704 wrote to memory of 672	1704	spoolsv.exe	29

C:\Users\Admin\AppData\Local\Temp\dobro.exe
"C:\Users\Admin\AppData\Local\Temp\dobro.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1956
- C:\Users\Admin\AppData\Local\Temp\spoolsv.exe
  "C:\Users\Admin\AppData\Local\Temp\spoolsv.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1704
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\spoolsv.exe" "spoolsv.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    PID:568
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /F /IM explorer.exe
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:672

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\spoolsv.exe

Filesize
151KB

MD5
a443234e456bbc4a78605ab336e7d7f6

SHA1
3ce499b7866a684755ae6b38980438719bff784b

SHA256
723d4e16788b240cd61087fe9b70d3f6e60117d0b7af0e242457a77541e277ce

SHA512
4fdfb874d9db98058709ce72bb7ca8b9dad2307f168ee2aae225ecc26fec33f5c41ceaa67d61ad6617181ccb85a237283e75cb6f43a74051155ec8c0d7fdbcd1

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

Filesize
151KB

MD5
a443234e456bbc4a78605ab336e7d7f6

SHA1
3ce499b7866a684755ae6b38980438719bff784b

SHA256
723d4e16788b240cd61087fe9b70d3f6e60117d0b7af0e242457a77541e277ce

SHA512
4fdfb874d9db98058709ce72bb7ca8b9dad2307f168ee2aae225ecc26fec33f5c41ceaa67d61ad6617181ccb85a237283e75cb6f43a74051155ec8c0d7fdbcd1

Download Submit
\Users\Admin\AppData\Local\Temp\spoolsv.exe

Filesize
151KB

MD5
a443234e456bbc4a78605ab336e7d7f6

SHA1
3ce499b7866a684755ae6b38980438719bff784b

SHA256
723d4e16788b240cd61087fe9b70d3f6e60117d0b7af0e242457a77541e277ce

SHA512
4fdfb874d9db98058709ce72bb7ca8b9dad2307f168ee2aae225ecc26fec33f5c41ceaa67d61ad6617181ccb85a237283e75cb6f43a74051155ec8c0d7fdbcd1

Download Submit
memory/1704-62-0x00000000001B0000-0x00000000001F0000-memory.dmp

Filesize
256KB

Download
memory/1956-54-0x0000000000990000-0x00000000009D0000-memory.dmp

Filesize
256KB

Download