nymaim | af6b2fa6bfc1d053db30b13f4fa626498102476536d7fcc0a5e59d6cf8ea7db5

General

Target

file.exe
Size

1.5MB
MD5

73c401cbcade7e7e913662255cce4bea
SHA1

67d3c92e4c3647ca90fe6613c27272552160cd8a
SHA256

af6b2fa6bfc1d053db30b13f4fa626498102476536d7fcc0a5e59d6cf8ea7db5
SHA512

eb9e2613a0cb7d10cfbae3a93c9fe438c1267c4ed4b3b77df13f96a13a25c5d2f264ea717e0b93b7c05ecd4a12fa518e54ed8c51a7bbd748b59b71fe17f0bf43
SSDEEP

24576:220Sx+R9LfFUS63aPM66SkWoDv57Twuv8T6KQ9hcV7NpZpgXC75ld1qSVpk:228LLCS63aPMFZtPwuWChuPZhd1qapk

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

C2

45.139.105.171

85.31.46.167

Signatures

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

Executes dropped EXE 3 IoCs

pid	Process
3956	file.tmp
4768	MitFiles138.exe
2868	D0Z2kDpB.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	MitFiles138.exe

Loads dropped DLL 1 IoCs

pid	Process
3956	file.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 17 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Mit Files\is-2RV37.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-IEBQ4.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-BMRRN.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\is-G664A.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Mit Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Mit Files\unins000.dat	file.tmp
File opened for modification	C:\Program Files (x86)\Mit Files\MitFiles138.exe	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-U55H4.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-2B46B.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-EQQIN.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\is-VMUKP.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\is-QSBLP.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-NU7HP.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-UAHUO.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-AA778.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-4RRFV.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\is-RCJCA.tmp	file.tmp

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
2028	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4768	MitFiles138.exe
4768	MitFiles138.exe
4768	MitFiles138.exe
4768	MitFiles138.exe
4768	MitFiles138.exe
4768	MitFiles138.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2028	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3044 wrote to memory of 3956	3044	file.exe	80
PID 3044 wrote to memory of 3956	3044	file.exe	80
PID 3044 wrote to memory of 3956	3044	file.exe	80
PID 3956 wrote to memory of 4768	3956	file.tmp	81
PID 3956 wrote to memory of 4768	3956	file.tmp	81
PID 3956 wrote to memory of 4768	3956	file.tmp	81
PID 4768 wrote to memory of 2868	4768	MitFiles138.exe	82
PID 4768 wrote to memory of 2868	4768	MitFiles138.exe	82
PID 4768 wrote to memory of 2868	4768	MitFiles138.exe	82
PID 4768 wrote to memory of 4164	4768	MitFiles138.exe	90
PID 4768 wrote to memory of 4164	4768	MitFiles138.exe	90
PID 4768 wrote to memory of 4164	4768	MitFiles138.exe	90
PID 4164 wrote to memory of 2028	4164	cmd.exe	92
PID 4164 wrote to memory of 2028	4164	cmd.exe	92
PID 4164 wrote to memory of 2028	4164	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3044
- C:\Users\Admin\AppData\Local\Temp\is-3T1HJ.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-3T1HJ.tmp\file.tmp" /SL5="$8004A,1337521,483328,C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:3956
- - C:\Program Files (x86)\Mit Files\MitFiles138.exe
    "C:\Program Files (x86)\Mit Files\MitFiles138.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4768
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\D0Z2kDpB.exe
      4⤵
      Executes dropped EXE
      PID:2868
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "MitFiles138.exe" /f & erase "C:\Program Files (x86)\Mit Files\MitFiles138.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4164
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "MitFiles138.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2028

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\Mit Files\MitFiles138.exe

Filesize
1.8MB

MD5
0eb0e7f047d211dffcfa7524d767657a

SHA1
e2d5c1955d0f7f791aa6d1704d127f1437903d81

SHA256
795609d154177341013645f89a08f9bafaeefe1ee2d39c4ec175c1baf5b1b369

SHA512
86a1992ea0b6db82f44b6b81e13396d4fa2f5509d6f8e003b7a7da7e56b7356a73f5cf53a9bc3a72531d3e6cc84f6950ab93bc73aa14d1f009cee29aa7ecddd6

Download Submit
C:\Program Files (x86)\Mit Files\MitFiles138.exe

Filesize
1.8MB

MD5
0eb0e7f047d211dffcfa7524d767657a

SHA1
e2d5c1955d0f7f791aa6d1704d127f1437903d81

SHA256
795609d154177341013645f89a08f9bafaeefe1ee2d39c4ec175c1baf5b1b369

SHA512
86a1992ea0b6db82f44b6b81e13396d4fa2f5509d6f8e003b7a7da7e56b7356a73f5cf53a9bc3a72531d3e6cc84f6950ab93bc73aa14d1f009cee29aa7ecddd6

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-3T1HJ.tmp\file.tmp

Filesize
695KB

MD5
415533bb40980951c966665cff9e2fe7

SHA1
fce396c8fa01876dd008f22c8be9a9b706f4aaec

SHA256
f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734

SHA512
3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-3T1HJ.tmp\file.tmp

Filesize
695KB

MD5
415533bb40980951c966665cff9e2fe7

SHA1
fce396c8fa01876dd008f22c8be9a9b706f4aaec

SHA256
f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734

SHA512
3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-PRA75.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\D0Z2kDpB.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\D0Z2kDpB.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/3044-155-0x0000000000400000-0x000000000047D000-memory.dmp

Filesize
500KB

Download
memory/3044-132-0x0000000000400000-0x000000000047D000-memory.dmp

Filesize
500KB

Download
memory/3044-138-0x0000000000400000-0x000000000047D000-memory.dmp

Filesize
500KB

Download
memory/4768-143-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/4768-151-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/4768-147-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4768-142-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/4768-154-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download

Analysis

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