44caliber | fe014092ae92e8372849bed9f5cf33946e8d918bdc50feddc1316bc837414ba8

General

Target

1b6293c7f0dfed044b0eba8b98b0faff.exe
Size

1.4MB
MD5

1b6293c7f0dfed044b0eba8b98b0faff
SHA1

e5705cbb256bb0b1a350e1b9fb71c1a1e4ac605a
SHA256

fe014092ae92e8372849bed9f5cf33946e8d918bdc50feddc1316bc837414ba8
SHA512

694e9afd04089172c991a712849049545459ceeed99780a6f012ca086fa2d1b70bbd627534b85b1797f4be22feda55e46e6966fe96a2ee66effdeeaa2eb650a5
SSDEEP

24576:d2G/nvxW3WckpJWjXbNQsVZy8v8BQSsZWcJ48z2AB4:dbA3wvW+sVZy8fZWmz9

Score

10^/10

44caliber dcrat infostealer rat stealer

Malware Config

Extracted

Family

44caliber

C2

https://discord.com/api/webhooks/1253689379948593173/lzPh5dDD7ETWYLRPMt2M_Ml82yS42YxolYTwBWldi4NXuLOvpMPhz7AlFtFln1RxcqaC

Signatures

44Caliber
An open source infostealer written in C#.
stealer 44caliber
DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
rat infostealer dcrat

Process spawned unexpected child process 9 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exe

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4872	1812	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1576	1812	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3536	1812	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4932	1812	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3764	1812	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4532	1812	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3828	1812	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1488	1812	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1432	1812	schtasks.exe	86

DCRat payload 4 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

Processes:

resource	yara_rule
behavioral2/memory/3100-1-0x0000000000F70000-0x00000000010DC000-memory.dmp	dcrat
behavioral2/files/0x00080000000233e9-8.dat	dcrat
behavioral2/files/0x00070000000233f1-37.dat	dcrat
behavioral2/memory/1284-39-0x0000000000C30000-0x0000000000D06000-memory.dmp	dcrat

Checks computer location settings 2 TTPs 4 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

1b6293c7f0dfed044b0eba8b98b0faff.exesvchost.exeWScript.exeServercrtDll.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	1b6293c7f0dfed044b0eba8b98b0faff.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	svchost.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	ServercrtDll.exe

Executes dropped EXE 4 IoCs

Processes:

svchost.exeexplorer.exeServercrtDll.exefontdrvhost.exe

pid	Process
2756	svchost.exe
4596	explorer.exe
1284	ServercrtDll.exe
2572	fontdrvhost.exe

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

System Information Discovery
T1082

Modifies registry class 2 IoCs

Processes:

svchost.exeServercrtDll.exe

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000_Classes\Local Settings	svchost.exe
Key created	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000_Classes\Local Settings	ServercrtDll.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 9 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exe

pid	Process
1576	schtasks.exe
3536	schtasks.exe
4932	schtasks.exe
3764	schtasks.exe
4532	schtasks.exe
1488	schtasks.exe
1432	schtasks.exe
4872	schtasks.exe
3828	schtasks.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

explorer.exeServercrtDll.exefontdrvhost.exe

pid	Process
4596	explorer.exe
4596	explorer.exe
1284	ServercrtDll.exe
1284	ServercrtDll.exe
1284	ServercrtDll.exe
1284	ServercrtDll.exe
2572	fontdrvhost.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

explorer.exeServercrtDll.exefontdrvhost.exe

description	pid	Process
Token: SeDebugPrivilege	4596	explorer.exe
Token: SeDebugPrivilege	1284	ServercrtDll.exe
Token: SeDebugPrivilege	2572	fontdrvhost.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

1b6293c7f0dfed044b0eba8b98b0faff.exesvchost.exeWScript.execmd.exeServercrtDll.execmd.exe

description	pid	Process	procid_target
PID 3100 wrote to memory of 2756	3100	1b6293c7f0dfed044b0eba8b98b0faff.exe	80
PID 3100 wrote to memory of 2756	3100	1b6293c7f0dfed044b0eba8b98b0faff.exe	80
PID 3100 wrote to memory of 2756	3100	1b6293c7f0dfed044b0eba8b98b0faff.exe	80
PID 3100 wrote to memory of 4596	3100	1b6293c7f0dfed044b0eba8b98b0faff.exe	81
PID 3100 wrote to memory of 4596	3100	1b6293c7f0dfed044b0eba8b98b0faff.exe	81
PID 2756 wrote to memory of 4844	2756	svchost.exe	82
PID 2756 wrote to memory of 4844	2756	svchost.exe	82
PID 2756 wrote to memory of 4844	2756	svchost.exe	82
PID 4844 wrote to memory of 3928	4844	WScript.exe	83
PID 4844 wrote to memory of 3928	4844	WScript.exe	83
PID 4844 wrote to memory of 3928	4844	WScript.exe	83
PID 3928 wrote to memory of 1284	3928	cmd.exe	85
PID 3928 wrote to memory of 1284	3928	cmd.exe	85
PID 1284 wrote to memory of 736	1284	ServercrtDll.exe	96
PID 1284 wrote to memory of 736	1284	ServercrtDll.exe	96
PID 736 wrote to memory of 4604	736	cmd.exe	98
PID 736 wrote to memory of 4604	736	cmd.exe	98
PID 736 wrote to memory of 2572	736	cmd.exe	99
PID 736 wrote to memory of 2572	736	cmd.exe	99

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\1b6293c7f0dfed044b0eba8b98b0faff.exe
"C:\Users\Admin\AppData\Local\Temp\1b6293c7f0dfed044b0eba8b98b0faff.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3100
- C:\Users\Admin\AppData\Local\Temp\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2756
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Hypercommon\s6qV8wojz3Yx3vhyfOAzGuFvxlJ5l.vbe"
    3⤵
    - Checks computer location settings
    - Suspicious use of WriteProcessMemory
    PID:4844
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Hypercommon\Udwe1ynNPaETo.bat" "
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3928
    - - C:\Hypercommon\ServercrtDll.exe
        
        "C:\Hypercommon\ServercrtDll.exe"
        5⤵
        Checks computer location settings
        Executes dropped EXE
        Modifies registry class
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1284
      - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\BgsClO9IFy.bat"
        6⤵
        Suspicious use of WriteProcessMemory
        
        PID:736
        
        C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        7⤵
        
        PID:4604
        
        C:\Users\Public\Music\fontdrvhost.exe
        
        "C:\Users\Public\Music\fontdrvhost.exe"
        7⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2572
- C:\Users\Admin\AppData\Local\Temp\explorer.exe
  "C:\Users\Admin\AppData\Local\Temp\explorer.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4596

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\unsecapp.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4872

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\unsecapp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1576

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 10 /tr "'C:\Recovery\WindowsRE\unsecapp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3536

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 7 /tr "'C:\Users\Public\Music\fontdrvhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4932

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Users\Public\Music\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3764

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 10 /tr "'C:\Users\Public\Music\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4532

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\upfc.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3828

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfc" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\upfc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1488

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\upfc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1432

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Hypercommon\ServercrtDll.exe

Filesize
828KB

MD5
801d5740c780d09b1cc6d971ce8b280f

SHA1
c7188e6f5998405d9dcbe83ce5d29267861be07d

SHA256
b678bee38602b80df34f15e4555bb689e2eb6aef26f4c273d652c88f8825c33f

SHA512
3296e517a6e0d6d3feb1f9d1544664b87589130d8a28f205626b2182ecdf333ff404f311ce69730d509e3072432024d3ed16db7068d35925375d9ecc5fe82b49

Download Submit
C:\Hypercommon\Udwe1ynNPaETo.bat

Filesize
33B

MD5
1af82b77403306ff43f68bf7a0786c52

SHA1
730a3bd4b524ffa024657c1fc27ffd82e25f3f81

SHA256
e358e4c2fc541cc4e5614b1af9360a85a32fc53babbc57ecf5858fe71d334f96

SHA512
0e33b779aceb2a42f5c42e07bcd3ac70a3dbb1fd2bbd4ae154979735f58eeaab5abea05cea682f4b73f6b54174ace8ac3046c6e9a84c4a729a6ed2bffa1a9ec1

Download Submit
C:\Hypercommon\s6qV8wojz3Yx3vhyfOAzGuFvxlJ5l.vbe

Filesize
201B

MD5
0f314eb5d52ce9cd85095eadff4f908c

SHA1
272d25d43f789dd5fad479ab31e96214f82302b3

SHA256
f17ea2d9d889ef2012cb57191ad3a1d2d3351df8539b4029d6f7080d66217e89

SHA512
471b72558c045bc4acd276087d82e564aa7685373dea3ac3e90390df0f7f42ea06ae0254d3a4a9dc57312c7b1485916f4d470bd353b4b8c0b35d705573105f09

Download Submit
C:\Users\Admin\AppData\Local\Temp\BgsClO9IFy.bat

Filesize
202B

MD5
096410ff9636c2c9cdaa1765b3c96ece

SHA1
0950e3c6def2875d9480ba6b6c6bdf3ebeb70152

SHA256
39bc6f177ccade9b73a38dd2a813c2213537d2f78a080a08fd776a5828aa924e

SHA512
05ec4437164c603fae98069d522edec7520a5af844ea5c071ad37211273c8ca2ade2f7d37c74ef3a941348ce41fb8bdb0074d9f95ce34ff4b38c4935073ef2c0

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

Filesize
303KB

MD5
7d9282b8529bbb4ac06a3994fbcd0622

SHA1
d38d467c5e533f3bc247b6ed245fb08412a479d7

SHA256
ca5820bbbcbefd08f5ec820b833b23f7f97556a247da39510a70cbe7b809e3a9

SHA512
aec2d63548176dc1a8ad3d2dfce0bc41973230c6898c55171dec7fc2919b84a8061d4308449c9551cc40ac7c08ad773fd6a7818bbd748ede9be64acc11dcfca5

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

Filesize
1.1MB

MD5
3ee661f4a9794c72a91fa1f783f54969

SHA1
35780f52351da65b60cc63b302018950cbfe849f

SHA256
ebcaf07121ce2483989e7a71d00b83c54b942f71e51271d5b28886ef03e45b51

SHA512
0b53edac853f257b3c40b8b8014f0b0d53f546410d352965eace8eb251b2d75aa02e171586750a70dd97a4bc103b4b7707e90d5bd7a47c786858514f83281bde

Download Submit
memory/1284-39-0x0000000000C30000-0x0000000000D06000-memory.dmp

Filesize
856KB

Download
memory/3100-0-0x0000000074FCE000-0x0000000074FCF000-memory.dmp

Filesize
4KB

Download
memory/3100-2-0x0000000005AF0000-0x0000000005B8C000-memory.dmp

Filesize
624KB

Download
memory/3100-1-0x0000000000F70000-0x00000000010DC000-memory.dmp

Filesize
1.4MB

Download
memory/4596-23-0x00007FFEF8BF3000-0x00007FFEF8BF5000-memory.dmp

Filesize
8KB

Download
memory/4596-26-0x00007FFEF8BF0000-0x00007FFEF96B1000-memory.dmp

Filesize
10.8MB

Download
memory/4596-24-0x0000018E68550000-0x0000018E685A2000-memory.dmp

Filesize
328KB

Download
memory/4596-55-0x00007FFEF8BF0000-0x00007FFEF96B1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads