gh0strat | c28770a88ad997d80ca6f461893cd6f032f614a43c449f21e73df15e8a843105

General

Target

c28770a88ad997d80ca6f461893cd6f032f614a43c449f21e73df15e8a843105.exe
Size

60KB
MD5

90d83bbad8110780e90b8f0beab172f9
SHA1

0ced0e716b07945787bf78ae6296a5f24bfdbe59
SHA256

c28770a88ad997d80ca6f461893cd6f032f614a43c449f21e73df15e8a843105
SHA512

92d4a6697644925176852c2b43bf297b16afadc2a993c135b5aa9df3c74a280bfb7cde883c6bf5c8b06202ff55168997dcf89ef2e791a3aeaca3cb09b6ac7707
SSDEEP

768:3e1iZNbQAKrWGOkGQeN70ZqL378KBBmbUt4i:36iZNer5GQvkUath

Score

10^/10

gh0strat redosdru discovery downloader loader rat upx

Malware Config

Extracted

Family

redosdru

C2

http://xiazai.caobibibi.com:7744/8.77.dll

Signatures

Gh0st RAT payload 11 IoCs

resource	yara_rule
behavioral2/memory/2680-8-0x0000000010000000-0x000000001034B000-memory.dmp	family_gh0strat
behavioral2/memory/2680-9-0x0000000010000000-0x000000001034B000-memory.dmp	family_gh0strat
behavioral2/memory/2680-12-0x0000000010000000-0x000000001034B000-memory.dmp	family_gh0strat
behavioral2/memory/2680-10-0x0000000010000000-0x000000001034B000-memory.dmp	family_gh0strat
behavioral2/memory/2956-27-0x0000000010000000-0x000000001034B000-memory.dmp	family_gh0strat
behavioral2/memory/2956-26-0x0000000010000000-0x000000001034B000-memory.dmp	family_gh0strat
behavioral2/memory/1688-32-0x0000000010000000-0x000000001034B000-memory.dmp	family_gh0strat
behavioral2/memory/1688-33-0x0000000010000000-0x000000001034B000-memory.dmp	family_gh0strat
behavioral2/memory/1688-34-0x0000000010000000-0x000000001034B000-memory.dmp	family_gh0strat
behavioral2/memory/1688-35-0x0000000010000000-0x000000001034B000-memory.dmp	family_gh0strat
behavioral2/memory/1688-48-0x0000000010000000-0x000000001034B000-memory.dmp	family_gh0strat

Gh0strat
Gh0st RAT is a remote access tool (RAT) with its source code public and it has been used by multiple Chinese groups.
rat gh0strat
Redosdru
Redosdru is a loader/downloader written in C++.
loader downloader redosdru

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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	c28770a88ad997d80ca6f461893cd6f032f614a43c449f21e73df15e8a843105.exe

Deletes itself 1 IoCs

pid	Process
4796	conhostdhfw.exe

Executes dropped EXE 4 IoCs

pid	Process
2956	conhostdhfw.exe
1688	conhostdhfw.exe
4796	conhostdhfw.exe
2276	conhostdhfw.exe

Drops file in System32 directory 16 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\349D186F1CB5682FA0194D4F3754EF36_BC1D0671A6396D650996E0E6013A6D37	conhostdhfw.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache	conhostdhfw.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B039FEA45CB4CC4BBACFC013C7C55604_50D7940D5D3FEDD8634D83074C7A46A3	conhostdhfw.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CF14D1855652602540DFCFECD21854DB_8C1AD9434E0E1576771CA7E7EAD43D9E	conhostdhfw.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE	conhostdhfw.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\0DA515F703BB9B49479E8697ADB0B955_786387CC77858B88BA3234B304062475	conhostdhfw.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData	conhostdhfw.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content	conhostdhfw.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\349D186F1CB5682FA0194D4F3754EF36_BC1D0671A6396D650996E0E6013A6D37	conhostdhfw.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5	conhostdhfw.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies	conhostdhfw.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\0DA515F703BB9B49479E8697ADB0B955_786387CC77858B88BA3234B304062475	conhostdhfw.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CF14D1855652602540DFCFECD21854DB_8C1AD9434E0E1576771CA7E7EAD43D9E	conhostdhfw.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B039FEA45CB4CC4BBACFC013C7C55604_50D7940D5D3FEDD8634D83074C7A46A3	conhostdhfw.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5	conhostdhfw.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft	conhostdhfw.exe

UPX packed file 13 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2680-5-0x0000000010000000-0x000000001034B000-memory.dmp	upx
behavioral2/memory/2680-8-0x0000000010000000-0x000000001034B000-memory.dmp	upx
behavioral2/memory/2680-9-0x0000000010000000-0x000000001034B000-memory.dmp	upx
behavioral2/memory/2680-12-0x0000000010000000-0x000000001034B000-memory.dmp	upx
behavioral2/memory/2680-10-0x0000000010000000-0x000000001034B000-memory.dmp	upx
behavioral2/memory/2956-27-0x0000000010000000-0x000000001034B000-memory.dmp	upx
behavioral2/memory/2956-26-0x0000000010000000-0x000000001034B000-memory.dmp	upx
behavioral2/memory/1688-29-0x0000000010000000-0x000000001034B000-memory.dmp	upx
behavioral2/memory/1688-32-0x0000000010000000-0x000000001034B000-memory.dmp	upx
behavioral2/memory/1688-33-0x0000000010000000-0x000000001034B000-memory.dmp	upx
behavioral2/memory/1688-34-0x0000000010000000-0x000000001034B000-memory.dmp	upx
behavioral2/memory/1688-35-0x0000000010000000-0x000000001034B000-memory.dmp	upx
behavioral2/memory/1688-48-0x0000000010000000-0x000000001034B000-memory.dmp	upx

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Windows NT\conhostdhfw.exe	c28770a88ad997d80ca6f461893cd6f032f614a43c449f21e73df15e8a843105.exe
File opened for modification	C:\Program Files (x86)\Windows NT\conhostdhfw.exe	c28770a88ad997d80ca6f461893cd6f032f614a43c449f21e73df15e8a843105.exe
File created	C:\Program Files\AppPatch\8.77.dll	c28770a88ad997d80ca6f461893cd6f032f614a43c449f21e73df15e8a843105.exe
File opened for modification	C:\Program Files\AppPatch\8.77.dll	c28770a88ad997d80ca6f461893cd6f032f614a43c449f21e73df15e8a843105.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1452	1688	WerFault.exe	88

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c28770a88ad997d80ca6f461893cd6f032f614a43c449f21e73df15e8a843105.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	conhostdhfw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	conhostdhfw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	conhostdhfw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	conhostdhfw.exe

Modifies data under HKEY_USERS 16 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	conhostdhfw.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P	conhostdhfw.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	conhostdhfw.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	conhostdhfw.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing	conhostdhfw.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P\History	conhostdhfw.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	conhostdhfw.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	conhostdhfw.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	conhostdhfw.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft	conhostdhfw.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows	conhostdhfw.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	conhostdhfw.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	conhostdhfw.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	conhostdhfw.exe
Key created	\REGISTRY\USER\.DEFAULT\Software	conhostdhfw.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion	conhostdhfw.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1688	conhostdhfw.exe
Token: SeDebugPrivilege	1688	conhostdhfw.exe
Token: SeDebugPrivilege	4796	conhostdhfw.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2680 wrote to memory of 2956	2680	c28770a88ad997d80ca6f461893cd6f032f614a43c449f21e73df15e8a843105.exe	87
PID 2680 wrote to memory of 2956	2680	c28770a88ad997d80ca6f461893cd6f032f614a43c449f21e73df15e8a843105.exe	87
PID 2680 wrote to memory of 2956	2680	c28770a88ad997d80ca6f461893cd6f032f614a43c449f21e73df15e8a843105.exe	87
PID 1688 wrote to memory of 4796	1688	conhostdhfw.exe	91
PID 1688 wrote to memory of 4796	1688	conhostdhfw.exe	91
PID 1688 wrote to memory of 4796	1688	conhostdhfw.exe	91
PID 1688 wrote to memory of 2276	1688	conhostdhfw.exe	92
PID 1688 wrote to memory of 2276	1688	conhostdhfw.exe	92
PID 1688 wrote to memory of 2276	1688	conhostdhfw.exe	92

C:\Users\Admin\AppData\Local\Temp\c28770a88ad997d80ca6f461893cd6f032f614a43c449f21e73df15e8a843105.exe
"C:\Users\Admin\AppData\Local\Temp\c28770a88ad997d80ca6f461893cd6f032f614a43c449f21e73df15e8a843105.exe"
1⤵
- Checks computer location settings
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2680
- C:\Program Files (x86)\Windows NT\conhostdhfw.exe
  "C:\Program Files (x86)\Windows NT\conhostdhfw.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2956

C:\Program Files (x86)\Windows NT\conhostdhfw.exe
"C:\Program Files (x86)\Windows NT\conhostdhfw.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1688
- C:\Program Files (x86)\Windows NT\conhostdhfw.exe
  "C:\Program Files (x86)\Windows NT\conhostdhfw.exe"
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Modifies data under HKEY_USERS
  - Suspicious use of AdjustPrivilegeToken
  PID:4796
- C:\Program Files (x86)\Windows NT\conhostdhfw.exe
  "C:\Program Files (x86)\Windows NT\conhostdhfw.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2276
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1688 -s 560
  2⤵
  - Program crash
  PID:1452

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1688 -ip 1688
1⤵
PID:4052

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\Windows NT\conhostdhfw.exe

Filesize
60KB

MD5
90d83bbad8110780e90b8f0beab172f9

SHA1
0ced0e716b07945787bf78ae6296a5f24bfdbe59

SHA256
c28770a88ad997d80ca6f461893cd6f032f614a43c449f21e73df15e8a843105

SHA512
92d4a6697644925176852c2b43bf297b16afadc2a993c135b5aa9df3c74a280bfb7cde883c6bf5c8b06202ff55168997dcf89ef2e791a3aeaca3cb09b6ac7707

Download Submit
C:\Program Files\AppPatch\8.77.dll

Filesize
240KB

MD5
0a74e0bffbce3cc5466796739cfdeb44

SHA1
c3b50df0a1de18b7053bff1b0293f5512f824055

SHA256
cdabc33a27b23c2060637193a4cbad94e16d31e6a4df7d67bdc6b63c1d056b30

SHA512
9fb4f39d95820f63da2d8767b76f317c512a8db1b86428f04baf4b163d0deaee5c4726c9f66807a3b1c223d575557fabc88e0cde73a4561b304f6edd76b8cc36

Download Submit
memory/1688-29-0x0000000010000000-0x000000001034B000-memory.dmp

Filesize
3.3MB

Download
memory/1688-48-0x0000000010000000-0x000000001034B000-memory.dmp

Filesize
3.3MB

Download
memory/1688-35-0x0000000010000000-0x000000001034B000-memory.dmp

Filesize
3.3MB

Download
memory/1688-34-0x0000000010000000-0x000000001034B000-memory.dmp

Filesize
3.3MB

Download
memory/1688-33-0x0000000010000000-0x000000001034B000-memory.dmp

Filesize
3.3MB

Download
memory/1688-32-0x0000000010000000-0x000000001034B000-memory.dmp

Filesize
3.3MB

Download
memory/2680-9-0x0000000010000000-0x000000001034B000-memory.dmp

Filesize
3.3MB

Download
memory/2680-10-0x0000000010000000-0x000000001034B000-memory.dmp

Filesize
3.3MB

Download
memory/2680-12-0x0000000010000000-0x000000001034B000-memory.dmp

Filesize
3.3MB

Download
memory/2680-8-0x0000000010000000-0x000000001034B000-memory.dmp

Filesize
3.3MB

Download
memory/2680-5-0x0000000010000000-0x000000001034B000-memory.dmp

Filesize
3.3MB

Download
memory/2956-26-0x0000000010000000-0x000000001034B000-memory.dmp

Filesize
3.3MB

Download
memory/2956-27-0x0000000010000000-0x000000001034B000-memory.dmp

Filesize
3.3MB

Download

Analysis

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