bitrat | aee478258bbebf0a4cb76eb703c210fa363edbb22d484fe3e6fbcf5f2c3d1af4

Resubmissions

03/03/2025, 05:49

250303-gjhrcayxf1 10

26/04/2021, 22:57

210426-27fq4xrdvx 10

Analysis

max time kernel
151s
max time network
154s
platform
windows7_x64
resource
win7v20210408
submitted
26/04/2021, 22:57

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General

Target

6c2934d4_by_Libranalysis.exe
Size

3.5MB
MD5

6c2934d437e948bf2727a4358edb9a59
SHA1

f5a10d17ebb6c2bd247156387d19accc6819cd3f
SHA256

aee478258bbebf0a4cb76eb703c210fa363edbb22d484fe3e6fbcf5f2c3d1af4
SHA512

ccb7c83a5c4f9f96aeeb03ee1460d964bae698e7a0d6b3aec1ab96af0ca7230173023c5c3b1cef29283053153181c69aec3a96bb027e3b39a94fd50ccdf5c246

Score

10^/10

bitrat persistence trojan upx

Malware Config

Signatures

BitRAT
BitRAT is a remote access tool written in C++ and uses leaked source code from other families.
trojan bitrat

BitRAT Payload 1 IoCs

resource	yara_rule
behavioral1/memory/1620-67-0x00000000007E2370-mapping.dmp	family_bitrat

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "\"C:\\Users\\Admin\\AppData\\Roaming\\nDlv4j2nb6r0yUVx\\U3Ctpd3uDnvI.exe\",explorer.exe"	6c2934d4_by_Libranalysis.exe

Executes dropped EXE 5 IoCs

pid	Process
1672	KTf5bkmR3LyzkcSt.exe
1912	wsappx.exe
1376	sihost32.exe
1040	steamgfx.exe
860	sihost32.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/1620-66-0x0000000000400000-0x00000000007E4000-memory.dmp	upx
behavioral1/memory/1620-70-0x0000000000400000-0x00000000007E4000-memory.dmp	upx

Loads dropped DLL 5 IoCs

pid	Process
1948	6c2934d4_by_Libranalysis.exe
1672	KTf5bkmR3LyzkcSt.exe
1912	wsappx.exe
1912	wsappx.exe
1040	steamgfx.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 4 IoCs

pid	Process
1620	cvtres.exe
1620	cvtres.exe
1620	cvtres.exe
1620	cvtres.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1948 set thread context of 1620	1948	6c2934d4_by_Libranalysis.exe	30
PID 1040 set thread context of 1296	1040	steamgfx.exe	42

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 2 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
964	schtasks.exe
848	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1948	6c2934d4_by_Libranalysis.exe
1948	6c2934d4_by_Libranalysis.exe
1912	wsappx.exe
1912	wsappx.exe
1040	steamgfx.exe
1040	steamgfx.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1948	6c2934d4_by_Libranalysis.exe
Token: SeDebugPrivilege	1620	cvtres.exe
Token: SeShutdownPrivilege	1620	cvtres.exe
Token: SeDebugPrivilege	1912	wsappx.exe
Token: SeDebugPrivilege	1040	steamgfx.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1620	cvtres.exe
1620	cvtres.exe

Suspicious use of WriteProcessMemory 50 IoCs

description	pid	Process	procid_target
PID 1948 wrote to memory of 1672	1948	6c2934d4_by_Libranalysis.exe	29
PID 1948 wrote to memory of 1672	1948	6c2934d4_by_Libranalysis.exe	29
PID 1948 wrote to memory of 1672	1948	6c2934d4_by_Libranalysis.exe	29
PID 1948 wrote to memory of 1672	1948	6c2934d4_by_Libranalysis.exe	29
PID 1948 wrote to memory of 1620	1948	6c2934d4_by_Libranalysis.exe	30
PID 1948 wrote to memory of 1620	1948	6c2934d4_by_Libranalysis.exe	30
PID 1948 wrote to memory of 1620	1948	6c2934d4_by_Libranalysis.exe	30
PID 1948 wrote to memory of 1620	1948	6c2934d4_by_Libranalysis.exe	30
PID 1948 wrote to memory of 1620	1948	6c2934d4_by_Libranalysis.exe	30
PID 1948 wrote to memory of 1620	1948	6c2934d4_by_Libranalysis.exe	30
PID 1948 wrote to memory of 1620	1948	6c2934d4_by_Libranalysis.exe	30
PID 1948 wrote to memory of 1620	1948	6c2934d4_by_Libranalysis.exe	30
PID 1672 wrote to memory of 1912	1672	KTf5bkmR3LyzkcSt.exe	31
PID 1672 wrote to memory of 1912	1672	KTf5bkmR3LyzkcSt.exe	31
PID 1672 wrote to memory of 1912	1672	KTf5bkmR3LyzkcSt.exe	31
PID 1672 wrote to memory of 1912	1672	KTf5bkmR3LyzkcSt.exe	31
PID 1912 wrote to memory of 1624	1912	wsappx.exe	32
PID 1912 wrote to memory of 1624	1912	wsappx.exe	32
PID 1912 wrote to memory of 1624	1912	wsappx.exe	32
PID 1624 wrote to memory of 964	1624	cmd.exe	34
PID 1624 wrote to memory of 964	1624	cmd.exe	34
PID 1624 wrote to memory of 964	1624	cmd.exe	34
PID 1912 wrote to memory of 1376	1912	wsappx.exe	35
PID 1912 wrote to memory of 1376	1912	wsappx.exe	35
PID 1912 wrote to memory of 1376	1912	wsappx.exe	35
PID 1912 wrote to memory of 1040	1912	wsappx.exe	36
PID 1912 wrote to memory of 1040	1912	wsappx.exe	36
PID 1912 wrote to memory of 1040	1912	wsappx.exe	36
PID 1040 wrote to memory of 944	1040	steamgfx.exe	37
PID 1040 wrote to memory of 944	1040	steamgfx.exe	37
PID 1040 wrote to memory of 944	1040	steamgfx.exe	37
PID 944 wrote to memory of 848	944	cmd.exe	39
PID 944 wrote to memory of 848	944	cmd.exe	39
PID 944 wrote to memory of 848	944	cmd.exe	39
PID 1040 wrote to memory of 860	1040	steamgfx.exe	41
PID 1040 wrote to memory of 860	1040	steamgfx.exe	41
PID 1040 wrote to memory of 860	1040	steamgfx.exe	41
PID 1040 wrote to memory of 1296	1040	steamgfx.exe	42
PID 1040 wrote to memory of 1296	1040	steamgfx.exe	42
PID 1040 wrote to memory of 1296	1040	steamgfx.exe	42
PID 1040 wrote to memory of 1296	1040	steamgfx.exe	42
PID 1040 wrote to memory of 1296	1040	steamgfx.exe	42
PID 1040 wrote to memory of 1296	1040	steamgfx.exe	42
PID 1040 wrote to memory of 1296	1040	steamgfx.exe	42
PID 1040 wrote to memory of 1296	1040	steamgfx.exe	42
PID 1040 wrote to memory of 1296	1040	steamgfx.exe	42
PID 1040 wrote to memory of 1296	1040	steamgfx.exe	42
PID 1040 wrote to memory of 1296	1040	steamgfx.exe	42
PID 1040 wrote to memory of 1296	1040	steamgfx.exe	42
PID 1040 wrote to memory of 1296	1040	steamgfx.exe	42

C:\Users\Admin\AppData\Local\Temp\6c2934d4_by_Libranalysis.exe
"C:\Users\Admin\AppData\Local\Temp\6c2934d4_by_Libranalysis.exe"
1⤵
- Modifies WinLogon for persistence
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1948
- C:\Users\Admin\AppData\Local\Temp\KTf5bkmR3LyzkcSt.exe
  "C:\Users\Admin\AppData\Local\Temp\KTf5bkmR3LyzkcSt.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1672
- - C:\Users\Admin\AppData\Local\Temp\RarSFX0\wsappx.exe
    "C:\Users\Admin\AppData\Local\Temp\RarSFX0\wsappx.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1912
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "steamgfx" /tr '"C:\Users\Admin\AppData\Local\Temp\steamgfx.exe"' & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1624
    - - C:\Windows\system32\schtasks.exe
        
        schtasks /create /f /sc onlogon /rl highest /tn "steamgfx" /tr '"C:\Users\Admin\AppData\Local\Temp\steamgfx.exe"'
        5⤵
        Creates scheduled task(s)
        
        PID:964
  - - C:\Users\Admin\AppData\Roaming\Microsoft\inc\sihost32.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\inc\sihost32.exe"
      4⤵
      Executes dropped EXE
      PID:1376
  - - C:\Users\Admin\AppData\Local\Temp\steamgfx.exe
      "C:\Users\Admin\AppData\Local\Temp\steamgfx.exe"
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1040
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "steamgfx" /tr '"C:\Users\Admin\AppData\Local\Temp\steamgfx.exe"' & exit
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:944
      - C:\Windows\system32\schtasks.exe
        
        schtasks /create /f /sc onlogon /rl highest /tn "steamgfx" /tr '"C:\Users\Admin\AppData\Local\Temp\steamgfx.exe"'
        6⤵
        Creates scheduled task(s)
        
        PID:848
    - - C:\Users\Admin\AppData\Roaming\Microsoft\inc\sihost32.exe
        
        "C:\Users\Admin\AppData\Roaming\Microsoft\inc\sihost32.exe"
        5⤵
        Executes dropped EXE
        
        PID:860
    - - C:\Windows\explorer.exe
        
        C:\Windows\explorer.exe --response-timeout=30 --farm-retries=30 --pool stratum://`0x687ac23d19389af7925d29280d17be81f33b06c5`@eth-us-east1.nanopool.org:9999 --unam-stealth
        5⤵
        
        PID:1296
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:1620

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Winlogon Helper DLL

T1004

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/860-100-0x0000000000360000-0x0000000000361000-memory.dmp

Filesize
4KB

Download
memory/860-104-0x000000001BEE0000-0x000000001BEE2000-memory.dmp

Filesize
8KB

Download
memory/1040-93-0x000000001C090000-0x000000001C092000-memory.dmp

Filesize
8KB

Download
memory/1040-102-0x0000000002540000-0x000000000254A000-memory.dmp

Filesize
40KB

Download
memory/1040-90-0x00000000001B0000-0x00000000001B1000-memory.dmp

Filesize
4KB

Download
memory/1296-106-0x0000000140000000-0x000000014038E000-memory.dmp

Filesize
3.6MB

Download
memory/1296-103-0x0000000140000000-0x000000014038E000-memory.dmp

Filesize
3.6MB

Download
memory/1376-84-0x0000000000970000-0x0000000000971000-memory.dmp

Filesize
4KB

Download
memory/1376-92-0x0000000002340000-0x0000000002342000-memory.dmp

Filesize
8KB

Download
memory/1620-66-0x0000000000400000-0x00000000007E4000-memory.dmp

Filesize
3.9MB

Download
memory/1620-70-0x0000000000400000-0x00000000007E4000-memory.dmp

Filesize
3.9MB

Download
memory/1912-75-0x0000000000940000-0x0000000000941000-memory.dmp

Filesize
4KB

Download
memory/1912-77-0x000000001BE60000-0x000000001BE62000-memory.dmp

Filesize
8KB

Download
memory/1948-61-0x00000000001F0000-0x00000000001F1000-memory.dmp

Filesize
4KB

Download
memory/1948-60-0x0000000075511000-0x0000000075513000-memory.dmp

Filesize
8KB

Download