bitrat | bdcf3c8b8f3f71c76e5a192bd9dbce2061379edb57eba0d41fdc69f9172a9d6b

General

Target

putty.exe
Size

157KB
MD5

fb9a5aa7537e9a41eaaa1b5714330895
SHA1

4ebf8ece21579fadd34288adf5a2b2140fd3ee8f
SHA256

bdcf3c8b8f3f71c76e5a192bd9dbce2061379edb57eba0d41fdc69f9172a9d6b
SHA512

2e8afe44d91d2f8de6da8220a34d9e1bbfe2a1fbd9b0ebbd04bc03f43dc1b133edff74bad9e5adcbe26bc7343505e9f39fd6555ede54409a66e7561fbf596da0
SSDEEP

3072:WTTtS/P8TSeZNgDTakOihnjbiTRjEXQAuis1Jy///f/MD:EtTBZAjOGGRviec3fE

Score

10^/10

bitrat persistence trojan

Malware Config

Extracted

Family

bitrat

Version

1.38

C2

pradeepprabhu705.hopto.org:312

Attributes

communication_password
827ccb0eea8a706c4c34a16891f84e7b
tor_process
tor

Signatures

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

Processes:

putty.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation putty.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	putty.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

putty.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\putty = "\"C:\\Users\\Admin\\AppData\\Roaming\\putty.exe\""	putty.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 4 IoCs

Processes:

putty.exe

pid process

4448 putty.exe
4448 putty.exe
4448 putty.exe
4448 putty.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

putty.exe

description pid process target process

PID 1256 set thread context of 4448 1256 putty.exe putty.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

powershell.exe

pid process

1016 powershell.exe
1016 powershell.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

putty.exepowershell.exeputty.exe

description pid process

Token: SeDebugPrivilege 1256 putty.exe
Token: SeDebugPrivilege 1016 powershell.exe
Token: SeShutdownPrivilege 4448 putty.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

putty.exe

pid process

4448 putty.exe
4448 putty.exe

pid	process
4448	putty.exe
4448	putty.exe
4448	putty.exe
4448	putty.exe

description	pid	process	target process
PID 1256 set thread context of 4448	1256	putty.exe	putty.exe

pid	process
1016	powershell.exe
1016	powershell.exe

description	pid	process
Token: SeDebugPrivilege	1256	putty.exe
Token: SeDebugPrivilege	1016	powershell.exe
Token: SeShutdownPrivilege	4448	putty.exe

pid	process
4448	putty.exe
4448	putty.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

putty.exe

description	pid	process	target process
PID 1256 wrote to memory of 1016	1256	putty.exe	powershell.exe
PID 1256 wrote to memory of 1016	1256	putty.exe	powershell.exe
PID 1256 wrote to memory of 1016	1256	putty.exe	powershell.exe
PID 1256 wrote to memory of 4448	1256	putty.exe	putty.exe
PID 1256 wrote to memory of 4448	1256	putty.exe	putty.exe
PID 1256 wrote to memory of 4448	1256	putty.exe	putty.exe
PID 1256 wrote to memory of 4448	1256	putty.exe	putty.exe
PID 1256 wrote to memory of 4448	1256	putty.exe	putty.exe
PID 1256 wrote to memory of 4448	1256	putty.exe	putty.exe
PID 1256 wrote to memory of 4448	1256	putty.exe	putty.exe
PID 1256 wrote to memory of 4448	1256	putty.exe	putty.exe
PID 1256 wrote to memory of 4448	1256	putty.exe	putty.exe
PID 1256 wrote to memory of 4448	1256	putty.exe	putty.exe
PID 1256 wrote to memory of 4448	1256	putty.exe	putty.exe

C:\Users\Admin\AppData\Local\Temp\putty.exe
"C:\Users\Admin\AppData\Local\Temp\putty.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1256

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMQAyADAA
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1016

C:\Users\Admin\AppData\Local\Temp\putty.exe
C:\Users\Admin\AppData\Local\Temp\putty.exe purecrypter.exe
2⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:4448

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

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

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_bpjj2ati.wme.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1016-159-0x0000000003560000-0x0000000003570000-memory.dmp

Filesize
64KB

Download
memory/1016-143-0x0000000006250000-0x00000000062B6000-memory.dmp

Filesize
408KB

Download
memory/1016-157-0x0000000003560000-0x0000000003570000-memory.dmp

Filesize
64KB

Download
memory/1016-160-0x0000000003560000-0x0000000003570000-memory.dmp

Filesize
64KB

Download
memory/1016-156-0x0000000006F00000-0x0000000006F1A000-memory.dmp

Filesize
104KB

Download
memory/1016-139-0x0000000003440000-0x0000000003476000-memory.dmp

Filesize
216KB

Download
memory/1016-140-0x0000000005BB0000-0x00000000061D8000-memory.dmp

Filesize
6.2MB

Download
memory/1016-141-0x0000000003560000-0x0000000003570000-memory.dmp

Filesize
64KB

Download
memory/1016-142-0x0000000003560000-0x0000000003570000-memory.dmp

Filesize
64KB

Download
memory/1016-161-0x0000000003560000-0x0000000003570000-memory.dmp

Filesize
64KB

Download
memory/1016-155-0x0000000008080000-0x00000000086FA000-memory.dmp

Filesize
6.5MB

Download
memory/1016-144-0x00000000063F0000-0x0000000006456000-memory.dmp

Filesize
408KB

Download
memory/1016-154-0x0000000006A20000-0x0000000006A3E000-memory.dmp

Filesize
120KB

Download
memory/1256-134-0x00000000054A0000-0x0000000005A44000-memory.dmp

Filesize
5.6MB

Download
memory/1256-138-0x0000000010430000-0x0000000010452000-memory.dmp

Filesize
136KB

Download
memory/1256-136-0x0000000005080000-0x000000000508A000-memory.dmp

Filesize
40KB

Download
memory/1256-158-0x0000000005110000-0x0000000005120000-memory.dmp

Filesize
64KB

Download
memory/1256-133-0x00000000005E0000-0x000000000060C000-memory.dmp

Filesize
176KB

Download
memory/1256-137-0x0000000005110000-0x0000000005120000-memory.dmp

Filesize
64KB

Download
memory/1256-135-0x0000000004FD0000-0x0000000005062000-memory.dmp

Filesize
584KB

Download
memory/4448-183-0x0000000074820000-0x0000000074859000-memory.dmp

Filesize
228KB

Download
memory/4448-166-0x0000000000400000-0x00000000007CE000-memory.dmp

Filesize
3.8MB

Download
memory/4448-169-0x0000000000400000-0x00000000007CE000-memory.dmp

Filesize
3.8MB

Download
memory/4448-170-0x0000000000400000-0x00000000007CE000-memory.dmp

Filesize
3.8MB

Download
memory/4448-172-0x0000000000400000-0x00000000007CE000-memory.dmp

Filesize
3.8MB

Download
memory/4448-173-0x0000000000400000-0x00000000007CE000-memory.dmp

Filesize
3.8MB

Download
memory/4448-174-0x0000000000400000-0x00000000007CE000-memory.dmp

Filesize
3.8MB

Download
memory/4448-175-0x0000000000400000-0x00000000007CE000-memory.dmp

Filesize
3.8MB

Download
memory/4448-176-0x0000000000400000-0x00000000007CE000-memory.dmp

Filesize
3.8MB

Download
memory/4448-177-0x0000000000400000-0x00000000007CE000-memory.dmp

Filesize
3.8MB

Download
memory/4448-178-0x00000000744A0000-0x00000000744D9000-memory.dmp

Filesize
228KB

Download
memory/4448-179-0x0000000000400000-0x00000000007CE000-memory.dmp

Filesize
3.8MB

Download
memory/4448-180-0x0000000074820000-0x0000000074859000-memory.dmp

Filesize
228KB

Download
memory/4448-181-0x0000000000400000-0x00000000007CE000-memory.dmp

Filesize
3.8MB

Download
memory/4448-182-0x0000000000400000-0x00000000007CE000-memory.dmp

Filesize
3.8MB

Download
memory/4448-167-0x0000000000400000-0x00000000007CE000-memory.dmp

Filesize
3.8MB

Download
memory/4448-184-0x0000000000400000-0x00000000007CE000-memory.dmp

Filesize
3.8MB

Download

Analysis

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