darkcomet | ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66

Analysis

max time kernel
184s
max time network
187s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
26/11/2022, 12:38

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General

Target

ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Size

1.1MB
MD5

647c5dde7a82629ee388904031bfa96b
SHA1

c73b8e712703e770d36b301fcf725fd0e6cb88f2
SHA256

ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66
SHA512

0bc9e989d3a27ef5ed2f1424fab902355c351ac40ecb613cb75a5d60ee295bcfdccd4840bf2f5eb2b15a53acd2cb5a6f37adb6d00e4e80e23268403243dfea5a
SSDEEP

24576:QUKoN0bUxgGa/pfBHDb+y1LXPeCXuLKdsOT:TK1A6ze/KdX

Score

10^/10

darkcomet isrstealer evasion persistence rat spyware stealer trojan upx

Malware Config

Signatures

Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
trojan rat darkcomet
ISR Stealer
ISR Stealer is a modified version of Hackhound Stealer written in visual basic.
trojan stealer isrstealer

ISR Stealer payload 8 IoCs

resource	yara_rule
behavioral2/memory/2348-132-0x0000000000400000-0x0000000000518000-memory.dmp	family_isrstealer
behavioral2/files/0x0006000000022e45-134.dat	family_isrstealer
behavioral2/files/0x0006000000022e45-135.dat	family_isrstealer
behavioral2/files/0x0006000000022e45-140.dat	family_isrstealer
behavioral2/files/0x0007000000022e3d-149.dat	family_isrstealer
behavioral2/files/0x0007000000022e3d-150.dat	family_isrstealer
behavioral2/memory/2348-151-0x0000000000400000-0x0000000000518000-memory.dmp	family_isrstealer
behavioral2/memory/216-152-0x0000000000400000-0x0000000000518000-memory.dmp	family_isrstealer

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\mssdcsc.exe"	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe

Modifies security service 2 TTPs 2 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4"	mssdcsc.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4"	iexplore.exe

Windows security bypass 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	mssdcsc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	iexplore.exe

Executes dropped EXE 3 IoCs

pid	Process
1060	ST.EXE
836	ST.EXE
216	mssdcsc.exe

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2348-132-0x0000000000400000-0x0000000000518000-memory.dmp	upx
behavioral2/memory/836-139-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/836-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/836-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/836-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/files/0x0007000000022e3d-149.dat	upx
behavioral2/files/0x0007000000022e3d-150.dat	upx
behavioral2/memory/2348-151-0x0000000000400000-0x0000000000518000-memory.dmp	upx
behavioral2/memory/216-152-0x0000000000400000-0x0000000000518000-memory.dmp	upx

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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Windows security modification 2 TTPs 1 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	mssdcsc.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Microsoft Update = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\mssdcsc.exe"	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1060 set thread context of 836	1060	ST.EXE	80
PID 216 set thread context of 2332	216	mssdcsc.exe	85

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3676	PING.EXE

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2332	iexplore.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Token: SeSecurityPrivilege	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Token: SeTakeOwnershipPrivilege	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Token: SeLoadDriverPrivilege	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Token: SeSystemProfilePrivilege	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Token: SeSystemtimePrivilege	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Token: SeProfSingleProcessPrivilege	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Token: SeIncBasePriorityPrivilege	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Token: SeCreatePagefilePrivilege	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Token: SeBackupPrivilege	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Token: SeRestorePrivilege	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Token: SeShutdownPrivilege	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Token: SeDebugPrivilege	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Token: SeSystemEnvironmentPrivilege	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Token: SeChangeNotifyPrivilege	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Token: SeRemoteShutdownPrivilege	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Token: SeUndockPrivilege	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Token: SeManageVolumePrivilege	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Token: SeImpersonatePrivilege	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Token: SeCreateGlobalPrivilege	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Token: 33	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Token: 34	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Token: 35	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Token: 36	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
Token: SeIncreaseQuotaPrivilege	216	mssdcsc.exe
Token: SeSecurityPrivilege	216	mssdcsc.exe
Token: SeTakeOwnershipPrivilege	216	mssdcsc.exe
Token: SeLoadDriverPrivilege	216	mssdcsc.exe
Token: SeSystemProfilePrivilege	216	mssdcsc.exe
Token: SeSystemtimePrivilege	216	mssdcsc.exe
Token: SeProfSingleProcessPrivilege	216	mssdcsc.exe
Token: SeIncBasePriorityPrivilege	216	mssdcsc.exe
Token: SeCreatePagefilePrivilege	216	mssdcsc.exe
Token: SeBackupPrivilege	216	mssdcsc.exe
Token: SeRestorePrivilege	216	mssdcsc.exe
Token: SeShutdownPrivilege	216	mssdcsc.exe
Token: SeDebugPrivilege	216	mssdcsc.exe
Token: SeSystemEnvironmentPrivilege	216	mssdcsc.exe
Token: SeChangeNotifyPrivilege	216	mssdcsc.exe
Token: SeRemoteShutdownPrivilege	216	mssdcsc.exe
Token: SeUndockPrivilege	216	mssdcsc.exe
Token: SeManageVolumePrivilege	216	mssdcsc.exe
Token: SeImpersonatePrivilege	216	mssdcsc.exe
Token: SeCreateGlobalPrivilege	216	mssdcsc.exe
Token: 33	216	mssdcsc.exe
Token: 34	216	mssdcsc.exe
Token: 35	216	mssdcsc.exe
Token: 36	216	mssdcsc.exe
Token: SeIncreaseQuotaPrivilege	2332	iexplore.exe
Token: SeSecurityPrivilege	2332	iexplore.exe
Token: SeTakeOwnershipPrivilege	2332	iexplore.exe
Token: SeLoadDriverPrivilege	2332	iexplore.exe
Token: SeSystemProfilePrivilege	2332	iexplore.exe
Token: SeSystemtimePrivilege	2332	iexplore.exe
Token: SeProfSingleProcessPrivilege	2332	iexplore.exe
Token: SeIncBasePriorityPrivilege	2332	iexplore.exe
Token: SeCreatePagefilePrivilege	2332	iexplore.exe
Token: SeBackupPrivilege	2332	iexplore.exe
Token: SeRestorePrivilege	2332	iexplore.exe
Token: SeShutdownPrivilege	2332	iexplore.exe
Token: SeDebugPrivilege	2332	iexplore.exe
Token: SeSystemEnvironmentPrivilege	2332	iexplore.exe
Token: SeChangeNotifyPrivilege	2332	iexplore.exe
Token: SeRemoteShutdownPrivilege	2332	iexplore.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1060	ST.EXE
2332	iexplore.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2348 wrote to memory of 1060	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe	79
PID 2348 wrote to memory of 1060	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe	79
PID 2348 wrote to memory of 1060	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe	79
PID 1060 wrote to memory of 836	1060	ST.EXE	80
PID 1060 wrote to memory of 836	1060	ST.EXE	80
PID 1060 wrote to memory of 836	1060	ST.EXE	80
PID 1060 wrote to memory of 836	1060	ST.EXE	80
PID 1060 wrote to memory of 836	1060	ST.EXE	80
PID 1060 wrote to memory of 836	1060	ST.EXE	80
PID 1060 wrote to memory of 836	1060	ST.EXE	80
PID 1060 wrote to memory of 836	1060	ST.EXE	80
PID 2348 wrote to memory of 5116	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe	81
PID 2348 wrote to memory of 5116	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe	81
PID 2348 wrote to memory of 5116	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe	81
PID 5116 wrote to memory of 3676	5116	cmd.exe	83
PID 5116 wrote to memory of 3676	5116	cmd.exe	83
PID 5116 wrote to memory of 3676	5116	cmd.exe	83
PID 2348 wrote to memory of 216	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe	84
PID 2348 wrote to memory of 216	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe	84
PID 2348 wrote to memory of 216	2348	ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe	84
PID 216 wrote to memory of 2332	216	mssdcsc.exe	85
PID 216 wrote to memory of 2332	216	mssdcsc.exe	85
PID 216 wrote to memory of 2332	216	mssdcsc.exe	85
PID 216 wrote to memory of 2332	216	mssdcsc.exe	85
PID 216 wrote to memory of 2332	216	mssdcsc.exe	85

C:\Users\Admin\AppData\Local\Temp\ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe
"C:\Users\Admin\AppData\Local\Temp\ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2348
- C:\Users\Admin\AppData\Local\Temp\ST.EXE
  "C:\Users\Admin\AppData\Local\Temp\ST.EXE"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1060
- - C:\Users\Admin\AppData\Local\Temp\ST.EXE
    /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
    3⤵
    - Executes dropped EXE
    PID:836
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k ping 127.0.0.1 -n 4 && del "C:\Users\Admin\AppData\Local\Temp\ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5116
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 4
    3⤵
    - Runs ping.exe
    PID:3676
- C:\Users\Admin\AppData\Local\Temp\MSDCSC\mssdcsc.exe
  "C:\Users\Admin\AppData\Local\Temp\MSDCSC\mssdcsc.exe"
  2⤵
  - Modifies security service
  - Windows security bypass
  - Executes dropped EXE
  - Windows security modification
  - Suspicious use of SetThreadContext
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:216
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
    3⤵
    - Modifies security service
    - Windows security bypass
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2332

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Disabling Security Tools

T1089

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\MSDCSC\mssdcsc.exe

Filesize
1.1MB

MD5
647c5dde7a82629ee388904031bfa96b

SHA1
c73b8e712703e770d36b301fcf725fd0e6cb88f2

SHA256
ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66

SHA512
0bc9e989d3a27ef5ed2f1424fab902355c351ac40ecb613cb75a5d60ee295bcfdccd4840bf2f5eb2b15a53acd2cb5a6f37adb6d00e4e80e23268403243dfea5a

Download Submit
C:\Users\Admin\AppData\Local\Temp\MSDCSC\mssdcsc.exe

Filesize
1.1MB

MD5
647c5dde7a82629ee388904031bfa96b

SHA1
c73b8e712703e770d36b301fcf725fd0e6cb88f2

SHA256
ad4b63444e1ab0da9be8923f21494927dc9f6577c0fc268f9bc656fd497d2c66

SHA512
0bc9e989d3a27ef5ed2f1424fab902355c351ac40ecb613cb75a5d60ee295bcfdccd4840bf2f5eb2b15a53acd2cb5a6f37adb6d00e4e80e23268403243dfea5a

Download Submit
C:\Users\Admin\AppData\Local\Temp\ST.EXE

Filesize
196KB

MD5
dc5705be7750d65884d7635861f9cb7d

SHA1
98d13661de10e746c3abf2758a61f363168f3b09

SHA256
413c860837e089e5a84a5519f6e7310785a47a0a2bbb85f6aa2fd5800edf915f

SHA512
daa99d665343bf82e202539f003519af64a9a700e59d3fd299afecbb97cafd8ebf96d276095a0d33f8f0d713ef5f051207eb4357863cf7950a81dc54ad3fc4bf

Download Submit
C:\Users\Admin\AppData\Local\Temp\ST.EXE

Filesize
196KB

MD5
dc5705be7750d65884d7635861f9cb7d

SHA1
98d13661de10e746c3abf2758a61f363168f3b09

SHA256
413c860837e089e5a84a5519f6e7310785a47a0a2bbb85f6aa2fd5800edf915f

SHA512
daa99d665343bf82e202539f003519af64a9a700e59d3fd299afecbb97cafd8ebf96d276095a0d33f8f0d713ef5f051207eb4357863cf7950a81dc54ad3fc4bf

Download Submit
C:\Users\Admin\AppData\Local\Temp\ST.EXE

Filesize
196KB

MD5
dc5705be7750d65884d7635861f9cb7d

SHA1
98d13661de10e746c3abf2758a61f363168f3b09

SHA256
413c860837e089e5a84a5519f6e7310785a47a0a2bbb85f6aa2fd5800edf915f

SHA512
daa99d665343bf82e202539f003519af64a9a700e59d3fd299afecbb97cafd8ebf96d276095a0d33f8f0d713ef5f051207eb4357863cf7950a81dc54ad3fc4bf

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/216-152-0x0000000000400000-0x0000000000518000-memory.dmp

Filesize
1.1MB

Download
memory/836-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/836-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/836-142-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/836-139-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2348-132-0x0000000000400000-0x0000000000518000-memory.dmp

Filesize
1.1MB

Download
memory/2348-151-0x0000000000400000-0x0000000000518000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads