umbral | 69a530a9f6907b629a39ba9f9e77c9cffe2c3c4f1b1192f8acee7a99cf7106e8

Analysis

max time kernel
16s
max time network
17s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
11-10-2024 21:41

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General

Target

Image Logger/Start.bat
Size

59B
MD5

f43a646ca2cde87cc20f3756ad12e51c
SHA1

2788e5da1348b7418356d2a485a40c7fb4697588
SHA256

3ea2dd9cdd54135aaf47b196acbd4b54be5744be4fdfa022600e2cdd1cdf7d0c
SHA512

3788d856a36cba78b147dfc4263682105cd4ddf6f6db701b4cbe95a4b449d397ff5d5f039a93dd77f055bb6db329f908796fb3ff0969a8070647ffc1c13fe7cb

Score

10^/10

umbral stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral7/memory/2468-50-0x0000000001240000-0x0000000001280000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral

Loads dropped DLL 7 IoCs

pid	Process
1948	main.exe
1948	main.exe
1948	main.exe
1948	main.exe
1948	main.exe
1948	main.exe
1948	main.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
6	ip-api.com

Suspicious use of AdjustPrivilegeToken 41 IoCs

description	pid	Process
Token: SeDebugPrivilege	2468	upx.exe
Token: SeIncreaseQuotaPrivilege	532	wmic.exe
Token: SeSecurityPrivilege	532	wmic.exe
Token: SeTakeOwnershipPrivilege	532	wmic.exe
Token: SeLoadDriverPrivilege	532	wmic.exe
Token: SeSystemProfilePrivilege	532	wmic.exe
Token: SeSystemtimePrivilege	532	wmic.exe
Token: SeProfSingleProcessPrivilege	532	wmic.exe
Token: SeIncBasePriorityPrivilege	532	wmic.exe
Token: SeCreatePagefilePrivilege	532	wmic.exe
Token: SeBackupPrivilege	532	wmic.exe
Token: SeRestorePrivilege	532	wmic.exe
Token: SeShutdownPrivilege	532	wmic.exe
Token: SeDebugPrivilege	532	wmic.exe
Token: SeSystemEnvironmentPrivilege	532	wmic.exe
Token: SeRemoteShutdownPrivilege	532	wmic.exe
Token: SeUndockPrivilege	532	wmic.exe
Token: SeManageVolumePrivilege	532	wmic.exe
Token: 33	532	wmic.exe
Token: 34	532	wmic.exe
Token: 35	532	wmic.exe
Token: SeIncreaseQuotaPrivilege	532	wmic.exe
Token: SeSecurityPrivilege	532	wmic.exe
Token: SeTakeOwnershipPrivilege	532	wmic.exe
Token: SeLoadDriverPrivilege	532	wmic.exe
Token: SeSystemProfilePrivilege	532	wmic.exe
Token: SeSystemtimePrivilege	532	wmic.exe
Token: SeProfSingleProcessPrivilege	532	wmic.exe
Token: SeIncBasePriorityPrivilege	532	wmic.exe
Token: SeCreatePagefilePrivilege	532	wmic.exe
Token: SeBackupPrivilege	532	wmic.exe
Token: SeRestorePrivilege	532	wmic.exe
Token: SeShutdownPrivilege	532	wmic.exe
Token: SeDebugPrivilege	532	wmic.exe
Token: SeSystemEnvironmentPrivilege	532	wmic.exe
Token: SeRemoteShutdownPrivilege	532	wmic.exe
Token: SeUndockPrivilege	532	wmic.exe
Token: SeManageVolumePrivilege	532	wmic.exe
Token: 33	532	wmic.exe
Token: 34	532	wmic.exe
Token: 35	532	wmic.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2516 wrote to memory of 1364	2516	cmd.exe	31
PID 2516 wrote to memory of 1364	2516	cmd.exe	31
PID 2516 wrote to memory of 1364	2516	cmd.exe	31
PID 2516 wrote to memory of 2468	2516	cmd.exe	32
PID 2516 wrote to memory of 2468	2516	cmd.exe	32
PID 2516 wrote to memory of 2468	2516	cmd.exe	32
PID 1364 wrote to memory of 1948	1364	main.exe	34
PID 1364 wrote to memory of 1948	1364	main.exe	34
PID 1364 wrote to memory of 1948	1364	main.exe	34
PID 2468 wrote to memory of 532	2468	upx.exe	35
PID 2468 wrote to memory of 532	2468	upx.exe	35
PID 2468 wrote to memory of 532	2468	upx.exe	35

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\Image Logger\Start.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:2516
- C:\Users\Admin\AppData\Local\Temp\Image Logger\Src\main.exe
  Src/main.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1364
- - C:\Users\Admin\AppData\Local\Temp\Image Logger\Src\main.exe
    Src/main.exe
    3⤵
    - Loads dropped DLL
    PID:1948
- C:\Users\Admin\AppData\Local\Temp\Image Logger\Src\Files\upx.exe
  Src/Files/upx.exe
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2468
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:532

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\_MEI13642\api-ms-win-core-file-l1-2-0.dll

Filesize
21KB

MD5
1c58526d681efe507deb8f1935c75487

SHA1
0e6d328faf3563f2aae029bc5f2272fb7a742672

SHA256
ef13dce8f71173315dfc64ab839b033ab19a968ee15230e9d4d2c9d558efeee2

SHA512
8edb9a0022f417648e2ece9e22c96e2727976332025c3e7d8f15bcf6d7d97e680d1bf008eb28e2e0bd57787dcbb71d38b2deb995b8edc35fa6852ab1d593f3d1

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI13642\api-ms-win-core-file-l2-1-0.dll

Filesize
18KB

MD5
bfffa7117fd9b1622c66d949bac3f1d7

SHA1
402b7b8f8dcfd321b1d12fc85a1ee5137a5569b2

SHA256
1ea267a2e6284f17dd548c6f2285e19f7edb15d6e737a55391140ce5cb95225e

SHA512
b319cc7b436b1be165cdf6ffcab8a87fe29de78f7e0b14c8f562be160481fb5483289bd5956fdc1d8660da7a3f86d8eede35c6cc2b7c3d4c852decf4b2dcdb7f

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI13642\api-ms-win-core-localization-l1-2-0.dll

Filesize
21KB

MD5
724223109e49cb01d61d63a8be926b8f

SHA1
072a4d01e01dbbab7281d9bd3add76f9a3c8b23b

SHA256
4e975f618df01a492ae433dff0dd713774d47568e44c377ceef9e5b34aad1210

SHA512
19b0065b894dc66c30a602c9464f118e7f84d83010e74457d48e93aaca4422812b093b15247b24d5c398b42ef0319108700543d13f156067b169ccfb4d7b6b7c

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI13642\api-ms-win-core-processthreads-l1-1-1.dll

Filesize
21KB

MD5
517eb9e2cb671ae49f99173d7f7ce43f

SHA1
4ccf38fed56166ddbf0b7efb4f5314c1f7d3b7ab

SHA256
57cc66bf0909c430364d35d92b64eb8b6a15dc201765403725fe323f39e8ac54

SHA512
492be2445b10f6bfe6c561c1fc6f5d1af6d1365b7449bc57a8f073b44ae49c88e66841f5c258b041547fcd33cbdcb4eb9dd3e24f0924db32720e51651e9286be

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI13642\api-ms-win-core-timezone-l1-1-0.dll

Filesize
21KB

MD5
d12403ee11359259ba2b0706e5e5111c

SHA1
03cc7827a30fd1dee38665c0cc993b4b533ac138

SHA256
f60e1751a6ac41f08e46480bf8e6521b41e2e427803996b32bdc5e78e9560781

SHA512
9004f4e59835af57f02e8d9625814db56f0e4a98467041da6f1367ef32366ad96e0338d48fff7cc65839a24148e2d9989883bcddc329d9f4d27cae3f843117d0

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI13642\python312.dll

Filesize
6.7MB

MD5
550288a078dffc3430c08da888e70810

SHA1
01b1d31f37fb3fd81d893cc5e4a258e976f5884f

SHA256
789a42ac160cef98f8925cb347473eeeb4e70f5513242e7faba5139ba06edf2d

SHA512
7244432fc3716f7ef27630d4e8fbc8180a2542aa97a01d44dca260ab43966dd8ac98b6023400b0478a4809aace1a128f1f4d6e544f2e591a5b436fd4c8a9d723

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI13642\ucrtbase.dll

Filesize
992KB

MD5
0e0bac3d1dcc1833eae4e3e4cf83c4ef

SHA1
4189f4459c54e69c6d3155a82524bda7549a75a6

SHA256
8a91052ef261b5fbf3223ae9ce789af73dfe1e9b0ba5bdbc4d564870a24f2bae

SHA512
a45946e3971816f66dd7ea3788aacc384a9e95011500b458212dc104741315b85659e0d56a41570731d338bdf182141c093d3ced222c007038583ceb808e26fd

Download Submit
memory/2468-9-0x000007FEF59A3000-0x000007FEF59A4000-memory.dmp

Filesize
4KB

Download
memory/2468-50-0x0000000001240000-0x0000000001280000-memory.dmp

Filesize
256KB

Download
memory/2468-145-0x000007FEF59A0000-0x000007FEF638C000-memory.dmp

Filesize
9.9MB

Download
memory/2468-146-0x000007FEF59A0000-0x000007FEF638C000-memory.dmp

Filesize
9.9MB

Download