darkcomet | c40b65558d773d5148551fd3d0b2f4c002c5d16df2f0077afd15d10db0be7848

General

Target

c40b65558d773d5148551fd3d0b2f4c002c5d16df2f0077afd15d10db0be7848.exe
Size

1.5MB
MD5

a7c3c8e1992dca26a686c79747b391d5
SHA1

716ee44002ac35a4201850ef52bf9f08b037c5ce
SHA256

c40b65558d773d5148551fd3d0b2f4c002c5d16df2f0077afd15d10db0be7848
SHA512

2c59435f875fcf3ceb38cd9a4bb89cb29f9e1a42e7e26206b9636df888eaf074dc7bad8331e57cd8d6860db85edc23a7f0fb6330f7f65ebe6d61cd7e8dd50b17
SSDEEP

24576:Xtb20pkaCqT5TBWgNQ7aC377sxJa2ALeGzaa7dNoxEH/MoZI8ndKJ6A:UVg5tQ7aC377sraXeUpNoxEfdZIB5

Score

10^/10

darkcomet default persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Default

C2

1336imm.noip.me:1336

Mutex

DCMIN_MUTEX-DJ6DL69

Attributes

gencode
rJML8aXpsfPK
install
false
offline_keylogger
true
persistence
false

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
3252	27207.exe

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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	c40b65558d773d5148551fd3d0b2f4c002c5d16df2f0077afd15d10db0be7848.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	27207.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WerFault = "C:\\Users\\Admin\\AppData\\Roaming\\27207.exe"	27207.exe

AutoIT Executable 2 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/files/0x000300000000072d-133.dat	autoit_exe
behavioral2/files/0x000300000000072d-134.dat	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3252 set thread context of 1240	3252	27207.exe	83

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

System Information Discovery
T1082

NTFS ADS 3 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\Temp\c40b65558d773d5148551fd3d0b2f4c002c5d16df2f0077afd15d10db0be7848.exe:Zone.Identifier:$DATA	c40b65558d773d5148551fd3d0b2f4c002c5d16df2f0077afd15d10db0be7848.exe
File created	C:\Users\Admin\AppData\Roaming\27207.exe\:Zone.Identifier:$DATA	c40b65558d773d5148551fd3d0b2f4c002c5d16df2f0077afd15d10db0be7848.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\27207.exe:Zone.Identifier:$DATA	27207.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
4996	c40b65558d773d5148551fd3d0b2f4c002c5d16df2f0077afd15d10db0be7848.exe
4996	c40b65558d773d5148551fd3d0b2f4c002c5d16df2f0077afd15d10db0be7848.exe
4996	c40b65558d773d5148551fd3d0b2f4c002c5d16df2f0077afd15d10db0be7848.exe
4996	c40b65558d773d5148551fd3d0b2f4c002c5d16df2f0077afd15d10db0be7848.exe
3252	27207.exe
3252	27207.exe
3252	27207.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
4996	c40b65558d773d5148551fd3d0b2f4c002c5d16df2f0077afd15d10db0be7848.exe
4996	c40b65558d773d5148551fd3d0b2f4c002c5d16df2f0077afd15d10db0be7848.exe
4996	c40b65558d773d5148551fd3d0b2f4c002c5d16df2f0077afd15d10db0be7848.exe
4996	c40b65558d773d5148551fd3d0b2f4c002c5d16df2f0077afd15d10db0be7848.exe
3252	27207.exe
3252	27207.exe
3252	27207.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 4996 wrote to memory of 3252	4996	c40b65558d773d5148551fd3d0b2f4c002c5d16df2f0077afd15d10db0be7848.exe	81
PID 4996 wrote to memory of 3252	4996	c40b65558d773d5148551fd3d0b2f4c002c5d16df2f0077afd15d10db0be7848.exe	81
PID 4996 wrote to memory of 3252	4996	c40b65558d773d5148551fd3d0b2f4c002c5d16df2f0077afd15d10db0be7848.exe	81
PID 3252 wrote to memory of 1240	3252	27207.exe	83
PID 3252 wrote to memory of 1240	3252	27207.exe	83
PID 3252 wrote to memory of 1240	3252	27207.exe	83
PID 3252 wrote to memory of 1240	3252	27207.exe	83
PID 3252 wrote to memory of 1240	3252	27207.exe	83
PID 3252 wrote to memory of 1240	3252	27207.exe	83
PID 3252 wrote to memory of 1240	3252	27207.exe	83
PID 3252 wrote to memory of 1240	3252	27207.exe	83
PID 3252 wrote to memory of 1240	3252	27207.exe	83
PID 3252 wrote to memory of 1240	3252	27207.exe	83
PID 3252 wrote to memory of 1240	3252	27207.exe	83
PID 3252 wrote to memory of 1240	3252	27207.exe	83
PID 3252 wrote to memory of 1240	3252	27207.exe	83
PID 3252 wrote to memory of 1240	3252	27207.exe	83

C:\Users\Admin\AppData\Local\Temp\c40b65558d773d5148551fd3d0b2f4c002c5d16df2f0077afd15d10db0be7848.exe
"C:\Users\Admin\AppData\Local\Temp\c40b65558d773d5148551fd3d0b2f4c002c5d16df2f0077afd15d10db0be7848.exe"
1⤵
- Checks computer location settings
- NTFS ADS
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:4996
- C:\Users\Admin\AppData\Roaming\27207.exe
  "C:\Users\Admin\AppData\Roaming\27207.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - NTFS ADS
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:3252
- - C:\Windows\SysWOW64\WerFault.exe
    "C:\Windows\SysWOW64\WerFault.exe"
    3⤵
    PID:1240

Network

MITRE ATT&CK Enterprise 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

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\r

Filesize
1KB

MD5
8db5d85d4e4fdd5502d657ac2f777304

SHA1
c0e5a0782cf843aa2e82c36a1df367d8ea5c03d4

SHA256
af005b46e08dddc9820363673bc425500f5ed7ab5c30f26f3ce273b8f9971f5c

SHA512
acc00a26d8177723fe8c8caf413e88d72c446d9a56d459b8748102a90cbfb1a56e9df9c2d7db40eb5b6d4888ec9519e7af715d23644d99ceb33fd0c8081835ff

Download Submit
C:\Users\Admin\AppData\Roaming\27207.exe

Filesize
1.5MB

MD5
a7c3c8e1992dca26a686c79747b391d5

SHA1
716ee44002ac35a4201850ef52bf9f08b037c5ce

SHA256
c40b65558d773d5148551fd3d0b2f4c002c5d16df2f0077afd15d10db0be7848

SHA512
2c59435f875fcf3ceb38cd9a4bb89cb29f9e1a42e7e26206b9636df888eaf074dc7bad8331e57cd8d6860db85edc23a7f0fb6330f7f65ebe6d61cd7e8dd50b17

Download Submit
C:\Users\Admin\AppData\Roaming\27207.exe

Filesize
1.5MB

MD5
a7c3c8e1992dca26a686c79747b391d5

SHA1
716ee44002ac35a4201850ef52bf9f08b037c5ce

SHA256
c40b65558d773d5148551fd3d0b2f4c002c5d16df2f0077afd15d10db0be7848

SHA512
2c59435f875fcf3ceb38cd9a4bb89cb29f9e1a42e7e26206b9636df888eaf074dc7bad8331e57cd8d6860db85edc23a7f0fb6330f7f65ebe6d61cd7e8dd50b17

Download Submit
memory/1240-138-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1240-139-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1240-140-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download

Analysis

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