nymaim | 1f628a053ff8d30cb12d2c644382bcf91c3b0d7fe0daa878355fbd418ef97e81

Resubmissions

28/09/2022, 04:30

220928-e5b5ksgbel10

28/09/2022, 04:19

220928-exhbmafac910

Analysis

max time kernel
112s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
28/09/2022, 04:30

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General

Target
file.exe
Size 414KB
Sample220928-e5b5ksgbel
SHA256 1f628a053ff8d30cb12d2c644382bcf91c3b0d7fe0daa878355fbd418ef97e81
MD5 dae2835ac53c88be1d3bccc33cc4640c
SHA1 b86b65e77facb97f09ed0df3f23c8f08d86eb585
SHA512 79cb0bee5d1be70e2b37303fa0afd711fef11a2af0d006458322afd62b9817969fdeedfcc47f3fbdbe47fa645b6b6f4595112002785a7ff6b2941d523ddc563d
SSDEEP 6144:V7KdCrrhCTo9vIxI9Ey8lYG5rzVhNU+4rkWX0mKnigabwVfs:V7KU5CMtIg8G4rJhi5rk1tiB
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

208.67.104.97
85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim

test.yar 12 IoCs

test.

resource	yara_rule
behavioral1/memory/2364-134-0x0000000000400000-0x000000000046C000-memory.dmp	test
behavioral1/memory/2364-136-0x0000000000400000-0x000000000046C000-memory.dmp	test
behavioral1/files/0x001900000001621a-139.dat	test
behavioral1/files/0x001900000001621a-140.dat	test
behavioral1/memory/1872-141-0x0000015A3FB90000-0x0000015A3FD12000-memory.dmp	test
behavioral1/memory/1872-142-0x00007FFA66F90000-0x00007FFA67A51000-memory.dmp	test
behavioral1/files/0x000f000000016296-143.dat	test
behavioral1/memory/1872-144-0x0000015A40170000-0x0000015A401B2000-memory.dmp	test
behavioral1/memory/1872-145-0x00007FFA66F90000-0x00007FFA67A51000-memory.dmp	test
behavioral1/memory/2364-146-0x0000000010000000-0x000000001001B000-memory.dmp	test
behavioral1/memory/1872-150-0x00007FFA66F90000-0x00007FFA67A51000-memory.dmp	test
behavioral1/memory/2364-154-0x0000000000400000-0x000000000046C000-memory.dmp	test

Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
1872	Cleaner.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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	file.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 12 IoCs

pid	pid_target	Process	procid_target
2468	2364	WerFault.exe	78
2060	2364	WerFault.exe	78
4676	2364	WerFault.exe	78
1236	2364	WerFault.exe	78
1140	2364	WerFault.exe	78
5028	2364	WerFault.exe	78
3656	2364	WerFault.exe	78
636	2364	WerFault.exe	78
4556	2364	WerFault.exe	78
3272	2364	WerFault.exe	78
2340	2364	WerFault.exe	78
4372	2364	WerFault.exe	78

Kills process with taskkill 1 IoCs

evasion

pid	Process
3916	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2364	file.exe
2364	file.exe
2364	file.exe
2364	file.exe
2364	file.exe
2364	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2364	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1872	Cleaner.exe
Token: SeDebugPrivilege	3916	taskkill.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2364 wrote to memory of 3204	2364	file.exe	104
PID 2364 wrote to memory of 3204	2364	file.exe	104
PID 2364 wrote to memory of 3204	2364	file.exe	104
PID 3204 wrote to memory of 1872	3204	cmd.exe	106
PID 3204 wrote to memory of 1872	3204	cmd.exe	106
PID 2364 wrote to memory of 1520	2364	file.exe	117
PID 2364 wrote to memory of 1520	2364	file.exe	117
PID 2364 wrote to memory of 1520	2364	file.exe	117
PID 1520 wrote to memory of 3916	1520	cmd.exe	121
PID 1520 wrote to memory of 3916	1520	cmd.exe	121
PID 1520 wrote to memory of 3916	1520	cmd.exe	121

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2364
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2364 -s 452
  2⤵
  - Program crash
  PID:2468
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2364 -s 764
  2⤵
  - Program crash
  PID:2060
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2364 -s 784
  2⤵
  - Program crash
  PID:4676
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2364 -s 784
  2⤵
  - Program crash
  PID:1236
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2364 -s 764
  2⤵
  - Program crash
  PID:1140
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2364 -s 944
  2⤵
  - Program crash
  PID:5028
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2364 -s 984
  2⤵
  - Program crash
  PID:3656
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2364 -s 1072
  2⤵
  - Program crash
  PID:636
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2364 -s 1372
  2⤵
  - Program crash
  PID:4556
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\nvbaOq2PgT\Cleaner.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3204
- - C:\Users\Admin\AppData\Local\Temp\nvbaOq2PgT\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\nvbaOq2PgT\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:1872
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2364 -s 1388
  2⤵
  - Program crash
  PID:3272
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2364 -s 1336
  2⤵
  - Program crash
  PID:2340
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "file.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1520
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3916
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2364 -s 1652
  2⤵
  - Program crash
  PID:4372

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2364 -ip 2364
1⤵
PID:2344

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 2364 -ip 2364
1⤵
PID:216

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 2364 -ip 2364
1⤵
PID:2204

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 2364 -ip 2364
1⤵
PID:2336

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 2364 -ip 2364
1⤵
PID:1056

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 2364 -ip 2364
1⤵
PID:1324

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 564 -p 2364 -ip 2364
1⤵
PID:4696

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 2364 -ip 2364
1⤵
PID:2136

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 2364 -ip 2364
1⤵
PID:1768

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 2364 -ip 2364
1⤵
PID:4916

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 2364 -ip 2364
1⤵
PID:4212

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 2364 -ip 2364
1⤵
PID:3848

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:2316

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

T1102

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

Bunifu_UI_v1.5.3.dll

Path C:\Users\Admin\AppData\Local\Temp\nvbaOq2PgT\Bunifu_UI_v1.5.3.dll
Size 236KB
SHA256 f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf
MD5 2ecb51ab00c5f340380ecf849291dbcf
SHA1 1a4dffbce2a4ce65495ed79eab42a4da3b660931
SHA512 e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b
SSDEEP 6144:SIQpxILDXGGMO7Ice9C5kQw2hWHcHTykhb:SIQpxILDXGGlET9n/cHG
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\nvbaOq2PgT\Cleaner.exe
Size 4.2MB
SHA256 663a353b45ed8f3acd4abc429f519635c1cf1294e3b9af98ffe6b1d4937c0e8f
MD5 e89589df13ac2783f322449f63547468
SHA1 bd938f596e09e2ed04c3bc0f0ac68de71e04bcf6
SHA512 9e0126975b32d022b6fe89d4681981e57ef1a3c6375ee2df131ce3527a3ad91c795d75302b78c8fc59651e9e20cebfd177b3278a87f45f8174f9e4ec09fc9cc6
SSDEEP 98304:B3D///UUrPV0vER7ehER7ehER7ehER7ehER7ehER7ehER7ehER7eG:Zacfffffffb
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\nvbaOq2PgT\Cleaner.exe
Size 4.2MB
SHA256 663a353b45ed8f3acd4abc429f519635c1cf1294e3b9af98ffe6b1d4937c0e8f
MD5 e89589df13ac2783f322449f63547468
SHA1 bd938f596e09e2ed04c3bc0f0ac68de71e04bcf6
SHA512 9e0126975b32d022b6fe89d4681981e57ef1a3c6375ee2df131ce3527a3ad91c795d75302b78c8fc59651e9e20cebfd177b3278a87f45f8174f9e4ec09fc9cc6
SSDEEP 98304:B3D///UUrPV0vER7ehER7ehER7ehER7ehER7ehER7ehER7ehER7eG:Zacfffffffb
MD5 SHA1 SHA512 SSDEEP

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memory/1872-150-0x00007FFA66F90000-0x00007FFA67A51000-memory.dmp

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memory/1872-142-0x00007FFA66F90000-0x00007FFA67A51000-memory.dmp

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memory/1872-145-0x00007FFA66F90000-0x00007FFA67A51000-memory.dmp

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memory/1872-144-0x0000015A40170000-0x0000015A401B2000-memory.dmp

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memory/1872-141-0x0000015A3FB90000-0x0000015A3FD12000-memory.dmp

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memory/2364-134-0x0000000000400000-0x000000000046C000-memory.dmp

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memory/2364-135-0x000000000066E000-0x0000000000694000-memory.dmp

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memory/2364-136-0x0000000000400000-0x000000000046C000-memory.dmp

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memory/2364-146-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2364-132-0x000000000066E000-0x0000000000694000-memory.dmp

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memory/2364-133-0x00000000005C0000-0x00000000005FF000-memory.dmp

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memory/2364-153-0x000000000066E000-0x0000000000694000-memory.dmp

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memory/2364-154-0x0000000000400000-0x000000000046C000-memory.dmp

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