bitrat | 23e10e6ce7df576f68283f2ceb00b0975170a3ef778161b35e3bbb578b4c7416

General

Target

mrkbkdFdag.exe
Size

1.6MB
MD5

cf6e51ffe0d98c19e74880e8ce170a9a
SHA1

2709d62f268d92c5d43aece4bd2089dace55c1ad
SHA256

23e10e6ce7df576f68283f2ceb00b0975170a3ef778161b35e3bbb578b4c7416
SHA512

25ff5c51aea16dc4f2ae5eb70f403eb2d386018297b86d0ccf4fe4dce6929d1409ae831c2721c404e9f58472873ce6e6b87a419b2355aee7fda7773366aab03a

Score

10^/10

bitrat trojan upx

Malware Config

Extracted

Family

bitrat

Version

1.38

C2

bitrat9400.duckdns.org:9400

Attributes

communication_password
e10adc3949ba59abbe56e057f20f883e
tor_process
tor

Signatures

BitRAT
BitRAT is a remote access tool written in C++ and uses leaked source code from other families.
trojan bitrat
Executes dropped EXE 2 IoCs

Processes:

casr.execasr.exe

pid process

536 casr.exe
1980 casr.exe

pid	process
536	casr.exe
1980	casr.exe

UPX packed file 11 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/880-61-0x0000000000400000-0x00000000007E4000-memory.dmp	upx
behavioral1/memory/880-63-0x0000000000400000-0x00000000007E4000-memory.dmp	upx
behavioral1/memory/880-64-0x0000000000400000-0x00000000007E4000-memory.dmp	upx
behavioral1/memory/880-67-0x0000000000400000-0x00000000007E4000-memory.dmp	upx
behavioral1/memory/880-66-0x0000000000400000-0x00000000007E4000-memory.dmp	upx
behavioral1/memory/880-70-0x0000000000400000-0x00000000007E4000-memory.dmp	upx
behavioral1/memory/880-71-0x0000000000400000-0x00000000007E4000-memory.dmp	upx
behavioral1/memory/880-72-0x0000000000400000-0x00000000007E4000-memory.dmp	upx
behavioral1/memory/880-75-0x0000000000400000-0x00000000007E4000-memory.dmp	upx
behavioral1/memory/2032-98-0x0000000000400000-0x00000000007E4000-memory.dmp	upx
behavioral1/memory/2032-99-0x0000000000400000-0x00000000007E4000-memory.dmp	upx

Suspicious use of NtSetInformationThreadHideFromDebugger 7 IoCs

Processes:

RegAsm.exeRegAsm.exe

pid process

880 RegAsm.exe
880 RegAsm.exe
880 RegAsm.exe
880 RegAsm.exe
880 RegAsm.exe
2032 RegAsm.exe
880 RegAsm.exe

pid	process
880	RegAsm.exe
880	RegAsm.exe
880	RegAsm.exe
880	RegAsm.exe
880	RegAsm.exe
2032	RegAsm.exe
880	RegAsm.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

mrkbkdFdag.execasr.exe

description	pid	process	target process
PID 1464 set thread context of 880	1464	mrkbkdFdag.exe	RegAsm.exe
PID 536 set thread context of 2032	536	casr.exe	RegAsm.exe

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

Processes:

schtasks.exeschtasks.exe

pid process

316 schtasks.exe
1792 schtasks.exe

pid	process
316	schtasks.exe
1792	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

RegAsm.exeRegAsm.exe

description	pid	process
Token: SeDebugPrivilege	880	RegAsm.exe
Token: SeShutdownPrivilege	880	RegAsm.exe
Token: SeDebugPrivilege	2032	RegAsm.exe
Token: SeShutdownPrivilege	2032	RegAsm.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

RegAsm.exe

pid process

880 RegAsm.exe
880 RegAsm.exe

pid	process
880	RegAsm.exe
880	RegAsm.exe

Suspicious use of WriteProcessMemory 54 IoCs

Processes:

mrkbkdFdag.execmd.exetaskeng.execasr.execmd.exe

description	pid	process	target process
PID 1464 wrote to memory of 640	1464	mrkbkdFdag.exe	cmd.exe
PID 1464 wrote to memory of 640	1464	mrkbkdFdag.exe	cmd.exe
PID 1464 wrote to memory of 640	1464	mrkbkdFdag.exe	cmd.exe
PID 1464 wrote to memory of 640	1464	mrkbkdFdag.exe	cmd.exe
PID 640 wrote to memory of 316	640	cmd.exe	schtasks.exe
PID 640 wrote to memory of 316	640	cmd.exe	schtasks.exe
PID 640 wrote to memory of 316	640	cmd.exe	schtasks.exe
PID 640 wrote to memory of 316	640	cmd.exe	schtasks.exe
PID 1464 wrote to memory of 1804	1464	mrkbkdFdag.exe	cmd.exe
PID 1464 wrote to memory of 1804	1464	mrkbkdFdag.exe	cmd.exe
PID 1464 wrote to memory of 1804	1464	mrkbkdFdag.exe	cmd.exe
PID 1464 wrote to memory of 1804	1464	mrkbkdFdag.exe	cmd.exe
PID 1464 wrote to memory of 880	1464	mrkbkdFdag.exe	RegAsm.exe
PID 1464 wrote to memory of 880	1464	mrkbkdFdag.exe	RegAsm.exe
PID 1464 wrote to memory of 880	1464	mrkbkdFdag.exe	RegAsm.exe
PID 1464 wrote to memory of 880	1464	mrkbkdFdag.exe	RegAsm.exe
PID 1464 wrote to memory of 880	1464	mrkbkdFdag.exe	RegAsm.exe
PID 1464 wrote to memory of 880	1464	mrkbkdFdag.exe	RegAsm.exe
PID 1464 wrote to memory of 880	1464	mrkbkdFdag.exe	RegAsm.exe
PID 1464 wrote to memory of 880	1464	mrkbkdFdag.exe	RegAsm.exe
PID 1464 wrote to memory of 880	1464	mrkbkdFdag.exe	RegAsm.exe
PID 1464 wrote to memory of 880	1464	mrkbkdFdag.exe	RegAsm.exe
PID 1464 wrote to memory of 880	1464	mrkbkdFdag.exe	RegAsm.exe
PID 684 wrote to memory of 536	684	taskeng.exe	casr.exe
PID 684 wrote to memory of 536	684	taskeng.exe	casr.exe
PID 684 wrote to memory of 536	684	taskeng.exe	casr.exe
PID 684 wrote to memory of 536	684	taskeng.exe	casr.exe
PID 536 wrote to memory of 1952	536	casr.exe	cmd.exe
PID 536 wrote to memory of 1952	536	casr.exe	cmd.exe
PID 536 wrote to memory of 1952	536	casr.exe	cmd.exe
PID 536 wrote to memory of 1952	536	casr.exe	cmd.exe
PID 1952 wrote to memory of 1792	1952	cmd.exe	schtasks.exe
PID 1952 wrote to memory of 1792	1952	cmd.exe	schtasks.exe
PID 1952 wrote to memory of 1792	1952	cmd.exe	schtasks.exe
PID 1952 wrote to memory of 1792	1952	cmd.exe	schtasks.exe
PID 536 wrote to memory of 560	536	casr.exe	cmd.exe
PID 536 wrote to memory of 560	536	casr.exe	cmd.exe
PID 536 wrote to memory of 560	536	casr.exe	cmd.exe
PID 536 wrote to memory of 560	536	casr.exe	cmd.exe
PID 536 wrote to memory of 2032	536	casr.exe	RegAsm.exe
PID 536 wrote to memory of 2032	536	casr.exe	RegAsm.exe
PID 536 wrote to memory of 2032	536	casr.exe	RegAsm.exe
PID 536 wrote to memory of 2032	536	casr.exe	RegAsm.exe
PID 536 wrote to memory of 2032	536	casr.exe	RegAsm.exe
PID 536 wrote to memory of 2032	536	casr.exe	RegAsm.exe
PID 536 wrote to memory of 2032	536	casr.exe	RegAsm.exe
PID 536 wrote to memory of 2032	536	casr.exe	RegAsm.exe
PID 536 wrote to memory of 2032	536	casr.exe	RegAsm.exe
PID 536 wrote to memory of 2032	536	casr.exe	RegAsm.exe
PID 536 wrote to memory of 2032	536	casr.exe	RegAsm.exe
PID 684 wrote to memory of 1980	684	taskeng.exe	casr.exe
PID 684 wrote to memory of 1980	684	taskeng.exe	casr.exe
PID 684 wrote to memory of 1980	684	taskeng.exe	casr.exe
PID 684 wrote to memory of 1980	684	taskeng.exe	casr.exe

C:\Users\Admin\AppData\Local\Temp\mrkbkdFdag.exe
"C:\Users\Admin\AppData\Local\Temp\mrkbkdFdag.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1464

C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /C schtasks /create /sc minute /mo 1 /tn "Nafdnasia" /tr "'C:\Users\Admin\AppData\Roaming\casr.exe'" /f
2⤵
- Suspicious use of WriteProcessMemory
PID:640

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /sc minute /mo 1 /tn "Nafdnasia" /tr "'C:\Users\Admin\AppData\Roaming\casr.exe'" /f
3⤵
- Creates scheduled task(s)
PID:316

C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /C copy "C:\Users\Admin\AppData\Local\Temp\mrkbkdFdag.exe" "C:\Users\Admin\AppData\Roaming\casr.exe"
2⤵
PID:1804

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
2⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:880

C:\Windows\system32\taskeng.exe
taskeng.exe {2179B07D-C19B-47CC-B64B-9FAF373AB4FA} S-1-5-21-1083475884-596052423-1669053738-1000:WYZSGDWS\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:684

C:\Users\Admin\AppData\Roaming\casr.exe
C:\Users\Admin\AppData\Roaming\casr.exe
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:536

C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /C schtasks /create /sc minute /mo 1 /tn "Nafdnasia" /tr "'C:\Users\Admin\AppData\Roaming\casr.exe'" /f
3⤵
- Suspicious use of WriteProcessMemory
PID:1952

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /sc minute /mo 1 /tn "Nafdnasia" /tr "'C:\Users\Admin\AppData\Roaming\casr.exe'" /f
4⤵
- Creates scheduled task(s)
PID:1792

C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /C copy "C:\Users\Admin\AppData\Roaming\casr.exe" "C:\Users\Admin\AppData\Roaming\casr.exe"
3⤵
PID:560

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
3⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of AdjustPrivilegeToken
PID:2032

C:\Users\Admin\AppData\Roaming\casr.exe
C:\Users\Admin\AppData\Roaming\casr.exe
2⤵
- Executes dropped EXE
PID:1980

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\casr.exe
Filesize
1.6MB

MD5
cf6e51ffe0d98c19e74880e8ce170a9a

SHA1
2709d62f268d92c5d43aece4bd2089dace55c1ad

SHA256
23e10e6ce7df576f68283f2ceb00b0975170a3ef778161b35e3bbb578b4c7416

SHA512
25ff5c51aea16dc4f2ae5eb70f403eb2d386018297b86d0ccf4fe4dce6929d1409ae831c2721c404e9f58472873ce6e6b87a419b2355aee7fda7773366aab03a

Download Submit
C:\Users\Admin\AppData\Roaming\casr.exe
Filesize
1.6MB

MD5
cf6e51ffe0d98c19e74880e8ce170a9a

SHA1
2709d62f268d92c5d43aece4bd2089dace55c1ad

SHA256
23e10e6ce7df576f68283f2ceb00b0975170a3ef778161b35e3bbb578b4c7416

SHA512
25ff5c51aea16dc4f2ae5eb70f403eb2d386018297b86d0ccf4fe4dce6929d1409ae831c2721c404e9f58472873ce6e6b87a419b2355aee7fda7773366aab03a

Download Submit
C:\Users\Admin\AppData\Roaming\casr.exe
Filesize
1.6MB

MD5
cf6e51ffe0d98c19e74880e8ce170a9a

SHA1
2709d62f268d92c5d43aece4bd2089dace55c1ad

SHA256
23e10e6ce7df576f68283f2ceb00b0975170a3ef778161b35e3bbb578b4c7416

SHA512
25ff5c51aea16dc4f2ae5eb70f403eb2d386018297b86d0ccf4fe4dce6929d1409ae831c2721c404e9f58472873ce6e6b87a419b2355aee7fda7773366aab03a

Download Submit
memory/316-58-0x0000000000000000-mapping.dmp

Download
memory/536-81-0x0000000001160000-0x00000000012F4000-memory.dmp

Filesize
1.6MB

Download
memory/536-79-0x0000000000000000-mapping.dmp

Download
memory/560-85-0x0000000000000000-mapping.dmp

Download
memory/640-57-0x0000000000000000-mapping.dmp

Download
memory/880-64-0x0000000000400000-0x00000000007E4000-memory.dmp

Filesize
3.9MB

Download
memory/880-60-0x0000000000400000-0x00000000007E4000-memory.dmp

Filesize
3.9MB

Download
memory/880-65-0x00000000007E2740-mapping.dmp

Download
memory/880-67-0x0000000000400000-0x00000000007E4000-memory.dmp

Filesize
3.9MB

Download
memory/880-66-0x0000000000400000-0x00000000007E4000-memory.dmp

Filesize
3.9MB

Download
memory/880-70-0x0000000000400000-0x00000000007E4000-memory.dmp

Filesize
3.9MB

Download
memory/880-71-0x0000000000400000-0x00000000007E4000-memory.dmp

Filesize
3.9MB

Download
memory/880-72-0x0000000000400000-0x00000000007E4000-memory.dmp

Filesize
3.9MB

Download
memory/880-73-0x0000000000120000-0x000000000012A000-memory.dmp

Filesize
40KB

Download
memory/880-74-0x0000000000120000-0x000000000012A000-memory.dmp

Filesize
40KB

Download
memory/880-75-0x0000000000400000-0x00000000007E4000-memory.dmp

Filesize
3.9MB

Download
memory/880-76-0x0000000000120000-0x000000000012A000-memory.dmp

Filesize
40KB

Download
memory/880-77-0x0000000000120000-0x000000000012A000-memory.dmp

Filesize
40KB

Download
memory/880-63-0x0000000000400000-0x00000000007E4000-memory.dmp

Filesize
3.9MB

Download
memory/880-61-0x0000000000400000-0x00000000007E4000-memory.dmp

Filesize
3.9MB

Download
memory/880-107-0x0000000000120000-0x000000000012A000-memory.dmp

Filesize
40KB

Download
memory/880-106-0x0000000000120000-0x000000000012A000-memory.dmp

Filesize
40KB

Download
memory/880-101-0x0000000000120000-0x000000000012A000-memory.dmp

Filesize
40KB

Download
memory/880-100-0x0000000000120000-0x000000000012A000-memory.dmp

Filesize
40KB

Download
memory/1464-56-0x00000000055C0000-0x0000000005736000-memory.dmp

Filesize
1.5MB

Download
memory/1464-55-0x0000000075EF1000-0x0000000075EF3000-memory.dmp

Filesize
8KB

Download
memory/1464-54-0x0000000000D40000-0x0000000000ED4000-memory.dmp

Filesize
1.6MB

Download
memory/1792-84-0x0000000000000000-mapping.dmp

Download
memory/1804-59-0x0000000000000000-mapping.dmp

Download
memory/1952-83-0x0000000000000000-mapping.dmp

Download
memory/1980-102-0x0000000000000000-mapping.dmp

Download
memory/1980-104-0x0000000000240000-0x00000000003D4000-memory.dmp

Filesize
1.6MB

Download
memory/2032-91-0x00000000007E2740-mapping.dmp

Download
memory/2032-98-0x0000000000400000-0x00000000007E4000-memory.dmp

Filesize
3.9MB

Download
memory/2032-99-0x0000000000400000-0x00000000007E4000-memory.dmp

Filesize
3.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads