ece8a18ca4213a95ef9b7d6f9bf18b81572c159cf2c7a836d70e2716cc7253da

Analysis

max time kernel
120s
max time network
122s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
02-03-2024 12:40

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General

Target

$PLUGINSDIR/npcap-1.71.exe
Size

1.1MB
MD5

40cfea6d5a3ff15caf6dd4ae88a012b2
SHA1

287b229cecf54ea110a8b8422dcda20922bdf65e
SHA256

5ccb61296c48e3f8cd20db738784bd7bf0daf8fce630f89892678b6dda4e533c
SHA512

6ac4955286a4927ce43f7e85783631c9a801605c89a18ba95dde34d90eecbf4825b09e116890c8aca8defff767ad14843303dd557a67636bed1f1709b5399024
SSDEEP

24576:AsYWFL4QHgF62xcgglC74wf9M3pK/Sn0Oaz+yruSOnN:1L4QAF6CFhl1Msqn0Oaa7

Score

4^/10

Malware Config

Signatures

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\Npcap\install.log	npcap-1.71.exe

Loads dropped DLL 4 IoCs

pid	Process
2036	npcap-1.71.exe
2036	npcap-1.71.exe
2036	npcap-1.71.exe
2036	npcap-1.71.exe

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

System Information Discovery
T1082

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2036	npcap-1.71.exe

Suspicious use of AdjustPrivilegeToken 40 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2792	WMIC.exe
Token: SeSecurityPrivilege	2792	WMIC.exe
Token: SeTakeOwnershipPrivilege	2792	WMIC.exe
Token: SeLoadDriverPrivilege	2792	WMIC.exe
Token: SeSystemProfilePrivilege	2792	WMIC.exe
Token: SeSystemtimePrivilege	2792	WMIC.exe
Token: SeProfSingleProcessPrivilege	2792	WMIC.exe
Token: SeIncBasePriorityPrivilege	2792	WMIC.exe
Token: SeCreatePagefilePrivilege	2792	WMIC.exe
Token: SeBackupPrivilege	2792	WMIC.exe
Token: SeRestorePrivilege	2792	WMIC.exe
Token: SeShutdownPrivilege	2792	WMIC.exe
Token: SeDebugPrivilege	2792	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2792	WMIC.exe
Token: SeRemoteShutdownPrivilege	2792	WMIC.exe
Token: SeUndockPrivilege	2792	WMIC.exe
Token: SeManageVolumePrivilege	2792	WMIC.exe
Token: 33	2792	WMIC.exe
Token: 34	2792	WMIC.exe
Token: 35	2792	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2792	WMIC.exe
Token: SeSecurityPrivilege	2792	WMIC.exe
Token: SeTakeOwnershipPrivilege	2792	WMIC.exe
Token: SeLoadDriverPrivilege	2792	WMIC.exe
Token: SeSystemProfilePrivilege	2792	WMIC.exe
Token: SeSystemtimePrivilege	2792	WMIC.exe
Token: SeProfSingleProcessPrivilege	2792	WMIC.exe
Token: SeIncBasePriorityPrivilege	2792	WMIC.exe
Token: SeCreatePagefilePrivilege	2792	WMIC.exe
Token: SeBackupPrivilege	2792	WMIC.exe
Token: SeRestorePrivilege	2792	WMIC.exe
Token: SeShutdownPrivilege	2792	WMIC.exe
Token: SeDebugPrivilege	2792	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2792	WMIC.exe
Token: SeRemoteShutdownPrivilege	2792	WMIC.exe
Token: SeUndockPrivilege	2792	WMIC.exe
Token: SeManageVolumePrivilege	2792	WMIC.exe
Token: 33	2792	WMIC.exe
Token: 34	2792	WMIC.exe
Token: 35	2792	WMIC.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2036 wrote to memory of 2796	2036	npcap-1.71.exe	28
PID 2036 wrote to memory of 2796	2036	npcap-1.71.exe	28
PID 2036 wrote to memory of 2796	2036	npcap-1.71.exe	28
PID 2036 wrote to memory of 2796	2036	npcap-1.71.exe	28
PID 2796 wrote to memory of 2792	2796	cmd.exe	30
PID 2796 wrote to memory of 2792	2796	cmd.exe	30
PID 2796 wrote to memory of 2792	2796	cmd.exe	30
PID 2796 wrote to memory of 2792	2796	cmd.exe	30
PID 2796 wrote to memory of 2684	2796	cmd.exe	31
PID 2796 wrote to memory of 2684	2796	cmd.exe	31
PID 2796 wrote to memory of 2684	2796	cmd.exe	31
PID 2796 wrote to memory of 2684	2796	cmd.exe	31

C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\npcap-1.71.exe
"C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\npcap-1.71.exe"
1⤵
- Drops file in Program Files directory
- Loads dropped DLL
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2036
- C:\Windows\SysWOW64\cmd.exe
  cmd /Q /C "%SYSTEMROOT%\System32\wbem\wmic.exe qfe get hotfixid | %SYSTEMROOT%\System32\findstr.exe "^KB4474419""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2796
- - C:\Windows\SysWOW64\wbem\WMIC.exe
    C:\Windows\System32\wbem\wmic.exe qfe get hotfixid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2792
- - C:\Windows\SysWOW64\findstr.exe
    C:\Windows\System32\findstr.exe "^KB4474419"
    3⤵
    PID:2684

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nst15A5.tmp\InstallOptions.dll

Filesize
22KB

MD5
170c17ac80215d0a377b42557252ae10

SHA1
4cbab6cc189d02170dd3ba7c25aa492031679411

SHA256
61ea114d9d0cd1e884535095aa3527a6c28df55a4ecee733c8c398f50b84cc3d

SHA512
0fd65cad0fcaa98083c2021de3d6429e79978658809c62ae9e4ed630c016915ced36aa52f2f692986c3b600c92325e79fd6d757634e8e02d5e582ff03679163f

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\Users\Admin\AppData\Local\Temp\nst15A5.tmp\System.dll

Filesize
19KB

MD5
f020a8d9ede1fb2af3651ad6e0ac9cb1

SHA1
341f9345d669432b2a51d107cbd101e8b82e37b1

SHA256
7efe73a8d32ed1b01727ad4579e9eec49c9309f2cb7bf03c8afa80d70242d1c0

SHA512
408fa5a797d3ff4b917bb4107771687004ba507a33cb5944b1cc3155e0372cb3e04a147f73852b9134f138ff709af3b0fb493cd8fa816c59e9f3d9b5649c68c4

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\Users\Admin\AppData\Local\Temp\nst15A5.tmp\nsExec.dll

Filesize
14KB

MD5
f9e61a25016dcb49867477c1e71a704e

SHA1
c01dc1fa7475e4812d158d6c00533410c597b5d9

SHA256
274e53dc8c5ddc273a6f5683b71b882ef8917029e2eaf6c8dbee0c62d999225d

SHA512
b4a6289ef9e761e29dd5362fecb1707c97d7cb3e160f4180036a96f2f904b2c64a075b5bf0fea4a3bb94dea97f3cfa0d057d3d6865c68da65fdcb9c3070c33d8

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