nymaim | e8638c41223f671b889dfd47b715053395d0ed4c5cae4690a1efd8ad73285545

Analysis

max time kernel
110s
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
25/09/2022, 02:22

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General

Target
file.exe
Size 284KB
Sample220925-ctklgacgh6
SHA256 e8638c41223f671b889dfd47b715053395d0ed4c5cae4690a1efd8ad73285545
MD5 e0663b43a4ddd17bdca98000cca9cbf7
SHA1 36bb48bc564dd672fd3e1a390024e463ff81c48c
SHA512 13dc899e129a16242b9c1c75869cafda10502ddecfd241cbc7d4015e6de91d5a998a51f99984b6a6ac833c9f60dab8e2e6b457abe57f292e672a3b748b96e446
SSDEEP 3072:wt2AIALOjEjz5N5Dpzd/Ox95/jV/7RdMgq92lvKYDYGOULHqsOUAjs9+J1sYPNq1:kLzjRxEXdV/rbyGXYGOUVOUAjskqYP
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
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
3952	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
4884	4720	WerFault.exe	78
4564	4720	WerFault.exe	78
2028	4720	WerFault.exe	78
1592	4720	WerFault.exe	78
4224	4720	WerFault.exe	78
212	4720	WerFault.exe	78
4608	4720	WerFault.exe	78
2572	4720	WerFault.exe	78
3172	4720	WerFault.exe	78
1480	4720	WerFault.exe	78
1996	4720	WerFault.exe	78
5000	4720	WerFault.exe	78

Kills process with taskkill 1 IoCs

evasion

pid	Process
4860	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4720	file.exe
4720	file.exe
4720	file.exe
4720	file.exe
4720	file.exe
4720	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4720	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3952	Cleaner.exe
Token: SeDebugPrivilege	4860	taskkill.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4720 wrote to memory of 4172	4720	file.exe	102
PID 4720 wrote to memory of 4172	4720	file.exe	102
PID 4720 wrote to memory of 4172	4720	file.exe	102
PID 4172 wrote to memory of 3952	4172	cmd.exe	104
PID 4172 wrote to memory of 3952	4172	cmd.exe	104
PID 4720 wrote to memory of 4760	4720	file.exe	115
PID 4720 wrote to memory of 4760	4720	file.exe	115
PID 4720 wrote to memory of 4760	4720	file.exe	115

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:4720
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4720 -s 452
  2⤵
  - Program crash
  PID:4884
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4720 -s 772
  2⤵
  - Program crash
  PID:4564
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4720 -s 812
  2⤵
  - Program crash
  PID:2028
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4720 -s 772
  2⤵
  - Program crash
  PID:1592
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4720 -s 860
  2⤵
  - Program crash
  PID:4224
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4720 -s 916
  2⤵
  - Program crash
  PID:212
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4720 -s 972
  2⤵
  - Program crash
  PID:4608
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4720 -s 972
  2⤵
  - Program crash
  PID:2572
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4720 -s 1372
  2⤵
  - Program crash
  PID:3172
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\z2CevYDz3hutk920ogd\Cleaner.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4172
- - C:\Users\Admin\AppData\Local\Temp\z2CevYDz3hutk920ogd\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\z2CevYDz3hutk920ogd\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:3952
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4720 -s 1384
  2⤵
  - Program crash
  PID:1480
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4720 -s 1664
  2⤵
  - Program crash
  PID:1996
- 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⤵
  PID:4760
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4860
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4720 -s 1692
  2⤵
  - Program crash
  PID:5000

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4720 -ip 4720
1⤵
PID:4308

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4720 -ip 4720
1⤵
PID:4936

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4720 -ip 4720
1⤵
PID:5020

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 4720 -ip 4720
1⤵
PID:1368

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 4720 -ip 4720
1⤵
PID:640

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4720 -ip 4720
1⤵
PID:3948

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4720 -ip 4720
1⤵
PID:4020

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4720 -ip 4720
1⤵
PID:2568

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 4720 -ip 4720
1⤵
PID:3796

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4720 -ip 4720
1⤵
PID:2600

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 496 -p 4720 -ip 4720
1⤵
PID:2380

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 4720 -ip 4720
1⤵
PID:3964

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\z2CevYDz3hutk920ogd\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\z2CevYDz3hutk920ogd\Cleaner.exe
Size 3.8MB
SHA256 301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c
MD5 23c1e8f48ec06960bbd9969c1f404192
SHA1 b9384151eb3f2dbd095fa273c248722e1cc74ea3
SHA512 f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b
SSDEEP 49152:W/PD/DL/D9CuZrr2h60qPAnDfvl/DK1zAb2ibtbelHi2btsTBrfwWXRxL56ZD0Mp:W3D///UUrPmfvVDWASmXnMn
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\z2CevYDz3hutk920ogd\Cleaner.exe
Size 3.8MB
SHA256 301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c
MD5 23c1e8f48ec06960bbd9969c1f404192
SHA1 b9384151eb3f2dbd095fa273c248722e1cc74ea3
SHA512 f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b
SSDEEP 49152:W/PD/DL/D9CuZrr2h60qPAnDfvl/DK1zAb2ibtbelHi2btsTBrfwWXRxL56ZD0Mp:W3D///UUrPmfvVDWASmXnMn
MD5 SHA1 SHA512 SSDEEP

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memory/3952-145-0x000001B537F50000-0x000001B537F92000-memory.dmp

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memory/3952-142-0x000001B51D9F0000-0x000001B51DB70000-memory.dmp

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memory/3952-146-0x00007FFBC86A0000-0x00007FFBC9161000-memory.dmp

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memory/3952-143-0x00007FFBC86A0000-0x00007FFBC9161000-memory.dmp

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memory/4720-135-0x0000000000709000-0x000000000072F000-memory.dmp

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memory/4720-134-0x0000000000400000-0x00000000005A1000-memory.dmp

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memory/4720-136-0x0000000000670000-0x00000000006AF000-memory.dmp

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memory/4720-132-0x0000000000709000-0x000000000072F000-memory.dmp

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memory/4720-133-0x0000000000670000-0x00000000006AF000-memory.dmp

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memory/4720-137-0x0000000000400000-0x00000000005A1000-memory.dmp

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memory/4720-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4720-152-0x0000000000400000-0x00000000005A1000-memory.dmp

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