njrat | dfa041441341667ccad6f97423727d8f0d345e4af967ed8b389d472285d9151b

General

Target

dfa041441341667ccad6f97423727d8f0d345e4af967ed8b389d472285d9151b.exe
Size

23KB
MD5

8385e62092d6cc0e2c901a7b1f1b0770
SHA1

3dd182bdda0786a58053c1ede1113e9440fcad2c
SHA256

dfa041441341667ccad6f97423727d8f0d345e4af967ed8b389d472285d9151b
SHA512

3ed2da81dc9c8ea429da04e3b1c1499333dd6749d31026d6461dbe5332551a7f4d7c0f4ff751ee1696587e9e9e1f22610df4ceec1b3db095edfecfa01ec9e5ba
SSDEEP

384:DweXCQIreJig/8Z7SS1fEBpng6tgL2IBPZVmRvR6JZlbw8hqIusZzZB3:ULq411eRpcnuS

Score

10^/10

njrat hack evasion persistence trojan

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

hack

C2

fuck10.no-ip.biz:50000

Mutex

219f889719b292a44f79b3e5d6ea87d4

Attributes

reg_key
219f889719b292a44f79b3e5d6ea87d4
splitter
|'|'|

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
3928	cours.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
5076	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	dfa041441341667ccad6f97423727d8f0d345e4af967ed8b389d472285d9151b.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\219f889719b292a44f79b3e5d6ea87d4.exe	cours.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\219f889719b292a44f79b3e5d6ea87d4.exe	cours.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\219f889719b292a44f79b3e5d6ea87d4 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\cours.exe\" .."	cours.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\219f889719b292a44f79b3e5d6ea87d4 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\cours.exe\" .."	cours.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 35 IoCs

description	pid	Process
Token: SeDebugPrivilege	3928	cours.exe
Token: 33	3928	cours.exe
Token: SeIncBasePriorityPrivilege	3928	cours.exe
Token: 33	3928	cours.exe
Token: SeIncBasePriorityPrivilege	3928	cours.exe
Token: 33	3928	cours.exe
Token: SeIncBasePriorityPrivilege	3928	cours.exe
Token: 33	3928	cours.exe
Token: SeIncBasePriorityPrivilege	3928	cours.exe
Token: 33	3928	cours.exe
Token: SeIncBasePriorityPrivilege	3928	cours.exe
Token: 33	3928	cours.exe
Token: SeIncBasePriorityPrivilege	3928	cours.exe
Token: 33	3928	cours.exe
Token: SeIncBasePriorityPrivilege	3928	cours.exe
Token: 33	3928	cours.exe
Token: SeIncBasePriorityPrivilege	3928	cours.exe
Token: 33	3928	cours.exe
Token: SeIncBasePriorityPrivilege	3928	cours.exe
Token: 33	3928	cours.exe
Token: SeIncBasePriorityPrivilege	3928	cours.exe
Token: 33	3928	cours.exe
Token: SeIncBasePriorityPrivilege	3928	cours.exe
Token: 33	3928	cours.exe
Token: SeIncBasePriorityPrivilege	3928	cours.exe
Token: 33	3928	cours.exe
Token: SeIncBasePriorityPrivilege	3928	cours.exe
Token: 33	3928	cours.exe
Token: SeIncBasePriorityPrivilege	3928	cours.exe
Token: 33	3928	cours.exe
Token: SeIncBasePriorityPrivilege	3928	cours.exe
Token: 33	3928	cours.exe
Token: SeIncBasePriorityPrivilege	3928	cours.exe
Token: 33	3928	cours.exe
Token: SeIncBasePriorityPrivilege	3928	cours.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4100 wrote to memory of 3928	4100	dfa041441341667ccad6f97423727d8f0d345e4af967ed8b389d472285d9151b.exe	83
PID 4100 wrote to memory of 3928	4100	dfa041441341667ccad6f97423727d8f0d345e4af967ed8b389d472285d9151b.exe	83
PID 4100 wrote to memory of 3928	4100	dfa041441341667ccad6f97423727d8f0d345e4af967ed8b389d472285d9151b.exe	83
PID 3928 wrote to memory of 5076	3928	cours.exe	84
PID 3928 wrote to memory of 5076	3928	cours.exe	84
PID 3928 wrote to memory of 5076	3928	cours.exe	84

C:\Users\Admin\AppData\Local\Temp\dfa041441341667ccad6f97423727d8f0d345e4af967ed8b389d472285d9151b.exe
"C:\Users\Admin\AppData\Local\Temp\dfa041441341667ccad6f97423727d8f0d345e4af967ed8b389d472285d9151b.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4100
- C:\Users\Admin\AppData\Local\Temp\cours.exe
  "C:\Users\Admin\AppData\Local\Temp\cours.exe"
  2⤵
  - Executes dropped EXE
  - Drops startup file
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3928
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\cours.exe" "cours.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    PID:5076

Network

MITRE ATT&CK Enterprise 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

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
23KB

MD5
8385e62092d6cc0e2c901a7b1f1b0770

SHA1
3dd182bdda0786a58053c1ede1113e9440fcad2c

SHA256
dfa041441341667ccad6f97423727d8f0d345e4af967ed8b389d472285d9151b

SHA512
3ed2da81dc9c8ea429da04e3b1c1499333dd6749d31026d6461dbe5332551a7f4d7c0f4ff751ee1696587e9e9e1f22610df4ceec1b3db095edfecfa01ec9e5ba

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

Filesize
23KB

MD5
8385e62092d6cc0e2c901a7b1f1b0770

SHA1
3dd182bdda0786a58053c1ede1113e9440fcad2c

SHA256
dfa041441341667ccad6f97423727d8f0d345e4af967ed8b389d472285d9151b

SHA512
3ed2da81dc9c8ea429da04e3b1c1499333dd6749d31026d6461dbe5332551a7f4d7c0f4ff751ee1696587e9e9e1f22610df4ceec1b3db095edfecfa01ec9e5ba

Download Submit
memory/3928-137-0x00000000753C0000-0x0000000075971000-memory.dmp

Filesize
5.7MB

Download
memory/3928-139-0x00000000753C0000-0x0000000075971000-memory.dmp

Filesize
5.7MB

Download
memory/4100-132-0x00000000753C0000-0x0000000075971000-memory.dmp

Filesize
5.7MB

Download
memory/4100-136-0x00000000753C0000-0x0000000075971000-memory.dmp

Filesize
5.7MB

Download

Analysis

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