darkcomet | ae5aa015798898802e277ff25fa8678f688f9df22ad9d15d849409d3d83b925d

General

Target

ae5aa015798898802e277ff25fa8678f688f9df22ad9d15d849409d3d83b925d.exe
Size

534KB
MD5

8093d7e4d74c549ee8c185c655f47e65
SHA1

4cefa845db22a23f0cb5e1b99ad8a1bcd5795ccc
SHA256

ae5aa015798898802e277ff25fa8678f688f9df22ad9d15d849409d3d83b925d
SHA512

954e90d6b857e8cac84137e12ddb9d775ece68eabbebdea5a5651a172b7a52f76443ba0cbeef980161839b2192e0be9e0903808d0544e49b92ee02ce2cbb474d
SSDEEP

12288:Hhqmauq42dSMeIdh07uRCxBzh9pVnfLSPijpmcUHlMSn8qcpuT:HhqmauqW8tAxBLdjpmoI08

Score

10^/10

darkcomet hf evasion persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

HF

C2

cyber-dos.no-ip.org:1337

Mutex

DC_MUTEX-EYQES59

Attributes

InstallPath
java32\java.exe
gencode
vP5N1dBnHx0W
install
true
offline_keylogger
true
persistence
true
reg_key
java

Signatures

Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
trojan rat darkcomet

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

vbc.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\java32\\java.exe"	vbc.exe

Executes dropped EXE 1 IoCs

Processes:

java.exe

pid process

4024 java.exe
Sets file to hidden 1 TTPs 2 IoCs
Modifies file attributes to stop it showing in Explorer etc.
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

216 attrib.exe
4460 attrib.exe

pid	process
4024	java.exe

pid	process
216	attrib.exe
4460	attrib.exe

UPX packed file 6 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/960-134-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/960-135-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/960-136-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/960-138-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/960-139-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/960-147-0x0000000000400000-0x00000000004B7000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

ae5aa015798898802e277ff25fa8678f688f9df22ad9d15d849409d3d83b925d.exevbc.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WindosU = "C:\\Users\\Admin\\AppData\\Local\\Temp\\WindosU.exe"	ae5aa015798898802e277ff25fa8678f688f9df22ad9d15d849409d3d83b925d.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\java = "C:\\Windows\\system32\\java32\\java.exe"	vbc.exe

Drops autorun.inf file 1 TTPs 4 IoCs

Malware can abuse Windows Autorun to spread further via attached volumes.

Replication Through Removable Media

T1091

Processes:

ae5aa015798898802e277ff25fa8678f688f9df22ad9d15d849409d3d83b925d.exe

description	ioc	process
File opened for modification	C:\autorun.inf	ae5aa015798898802e277ff25fa8678f688f9df22ad9d15d849409d3d83b925d.exe
File created	D:\autorun.inf	ae5aa015798898802e277ff25fa8678f688f9df22ad9d15d849409d3d83b925d.exe
File opened for modification	D:\autorun.inf	ae5aa015798898802e277ff25fa8678f688f9df22ad9d15d849409d3d83b925d.exe
File created	C:\autorun.inf	ae5aa015798898802e277ff25fa8678f688f9df22ad9d15d849409d3d83b925d.exe

Drops file in System32 directory 3 IoCs

Processes:

vbc.exe

description	ioc	process
File created	C:\Windows\SysWOW64\java32\java.exe	vbc.exe
File opened for modification	C:\Windows\SysWOW64\java32\java.exe	vbc.exe
File opened for modification	C:\Windows\SysWOW64\java32\	vbc.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

ae5aa015798898802e277ff25fa8678f688f9df22ad9d15d849409d3d83b925d.exe

description pid process target process

PID 4084 set thread context of 960 4084 ae5aa015798898802e277ff25fa8678f688f9df22ad9d15d849409d3d83b925d.exe vbc.exe

description	pid	process	target process
PID 4084 set thread context of 960	4084	ae5aa015798898802e277ff25fa8678f688f9df22ad9d15d849409d3d83b925d.exe	vbc.exe

Drops file in Windows directory 2 IoCs

Processes:

attrib.exeattrib.exe

description	ioc	process
File opened for modification	C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe	attrib.exe
File opened for modification	C:\Windows\Microsoft.NET\Framework\v2.0.50727	attrib.exe

Suspicious use of AdjustPrivilegeToken 24 IoCs

Processes:

vbc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	960	vbc.exe
Token: SeSecurityPrivilege	960	vbc.exe
Token: SeTakeOwnershipPrivilege	960	vbc.exe
Token: SeLoadDriverPrivilege	960	vbc.exe
Token: SeSystemProfilePrivilege	960	vbc.exe
Token: SeSystemtimePrivilege	960	vbc.exe
Token: SeProfSingleProcessPrivilege	960	vbc.exe
Token: SeIncBasePriorityPrivilege	960	vbc.exe
Token: SeCreatePagefilePrivilege	960	vbc.exe
Token: SeBackupPrivilege	960	vbc.exe
Token: SeRestorePrivilege	960	vbc.exe
Token: SeShutdownPrivilege	960	vbc.exe
Token: SeDebugPrivilege	960	vbc.exe
Token: SeSystemEnvironmentPrivilege	960	vbc.exe
Token: SeChangeNotifyPrivilege	960	vbc.exe
Token: SeRemoteShutdownPrivilege	960	vbc.exe
Token: SeUndockPrivilege	960	vbc.exe
Token: SeManageVolumePrivilege	960	vbc.exe
Token: SeImpersonatePrivilege	960	vbc.exe
Token: SeCreateGlobalPrivilege	960	vbc.exe
Token: 33	960	vbc.exe
Token: 34	960	vbc.exe
Token: 35	960	vbc.exe
Token: 36	960	vbc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

ae5aa015798898802e277ff25fa8678f688f9df22ad9d15d849409d3d83b925d.exevbc.execmd.execmd.exe

description	pid	process	target process
PID 4084 wrote to memory of 960	4084	ae5aa015798898802e277ff25fa8678f688f9df22ad9d15d849409d3d83b925d.exe	vbc.exe
PID 4084 wrote to memory of 960	4084	ae5aa015798898802e277ff25fa8678f688f9df22ad9d15d849409d3d83b925d.exe	vbc.exe
PID 4084 wrote to memory of 960	4084	ae5aa015798898802e277ff25fa8678f688f9df22ad9d15d849409d3d83b925d.exe	vbc.exe
PID 4084 wrote to memory of 960	4084	ae5aa015798898802e277ff25fa8678f688f9df22ad9d15d849409d3d83b925d.exe	vbc.exe
PID 4084 wrote to memory of 960	4084	ae5aa015798898802e277ff25fa8678f688f9df22ad9d15d849409d3d83b925d.exe	vbc.exe
PID 4084 wrote to memory of 960	4084	ae5aa015798898802e277ff25fa8678f688f9df22ad9d15d849409d3d83b925d.exe	vbc.exe
PID 4084 wrote to memory of 960	4084	ae5aa015798898802e277ff25fa8678f688f9df22ad9d15d849409d3d83b925d.exe	vbc.exe
PID 4084 wrote to memory of 960	4084	ae5aa015798898802e277ff25fa8678f688f9df22ad9d15d849409d3d83b925d.exe	vbc.exe
PID 960 wrote to memory of 788	960	vbc.exe	cmd.exe
PID 960 wrote to memory of 788	960	vbc.exe	cmd.exe
PID 960 wrote to memory of 788	960	vbc.exe	cmd.exe
PID 960 wrote to memory of 3636	960	vbc.exe	cmd.exe
PID 960 wrote to memory of 3636	960	vbc.exe	cmd.exe
PID 960 wrote to memory of 3636	960	vbc.exe	cmd.exe
PID 3636 wrote to memory of 216	3636	cmd.exe	attrib.exe
PID 3636 wrote to memory of 216	3636	cmd.exe	attrib.exe
PID 3636 wrote to memory of 216	3636	cmd.exe	attrib.exe
PID 788 wrote to memory of 4460	788	cmd.exe	attrib.exe
PID 788 wrote to memory of 4460	788	cmd.exe	attrib.exe
PID 788 wrote to memory of 4460	788	cmd.exe	attrib.exe
PID 960 wrote to memory of 4024	960	vbc.exe	java.exe
PID 960 wrote to memory of 4024	960	vbc.exe	java.exe
PID 960 wrote to memory of 4024	960	vbc.exe	java.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

216 attrib.exe
4460 attrib.exe

pid	process
216	attrib.exe
4460	attrib.exe

C:\Users\Admin\AppData\Local\Temp\ae5aa015798898802e277ff25fa8678f688f9df22ad9d15d849409d3d83b925d.exe
"C:\Users\Admin\AppData\Local\Temp\ae5aa015798898802e277ff25fa8678f688f9df22ad9d15d849409d3d83b925d.exe"
1⤵
- Adds Run key to start application
- Drops autorun.inf file
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4084

C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
2⤵
- Modifies WinLogon for persistence
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:960

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" +s +h
3⤵
- Suspicious use of WriteProcessMemory
PID:788

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" +s +h
4⤵
- Sets file to hidden
- Drops file in Windows directory
- Views/modifies file attributes
PID:4460

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727" +s +h
3⤵
- Suspicious use of WriteProcessMemory
PID:3636

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727" +s +h
4⤵
- Sets file to hidden
- Drops file in Windows directory
- Views/modifies file attributes
PID:216

C:\Windows\SysWOW64\java32\java.exe
"C:\Windows\system32\java32\java.exe"
3⤵
- Executes dropped EXE
PID:4024

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Replication Through Removable Media

1

T1091

Execution

Scripting

1

T1064

Persistence

Winlogon Helper DLL

1

T1004

Hidden Files and Directories

2

T1158

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Hidden Files and Directories

2

T1158

Scripting

1

T1064

Credential Access

Discovery

Lateral Movement

Replication Through Removable Media

1

T1091

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Windows\SysWOW64\java32\java.exe
Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
C:\Windows\SysWOW64\java32\java.exe
Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
memory/216-142-0x0000000000000000-mapping.dmp

Download
memory/788-140-0x0000000000000000-mapping.dmp

Download
memory/960-136-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/960-138-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/960-139-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/960-135-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/960-134-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/960-133-0x0000000000000000-mapping.dmp

Download
memory/960-147-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/3636-141-0x0000000000000000-mapping.dmp

Download
memory/4024-144-0x0000000000000000-mapping.dmp

Download
memory/4084-137-0x0000000074A30000-0x0000000074FE1000-memory.dmp

Filesize
5.7MB

Download
memory/4084-132-0x0000000074A30000-0x0000000074FE1000-memory.dmp

Filesize
5.7MB

Download
memory/4460-143-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads