nymaim | d60c1813155846ed4345434d8c2d146215c78ebbf7bbbdf87a38ddc395643fb4

General

Target

file.exe
Size

1.3MB
MD5

fffff7988574c9fbd105735afcc2f194
SHA1

55f5268523983edda2dd4024f4fb7f33e4c609a3
SHA256

d60c1813155846ed4345434d8c2d146215c78ebbf7bbbdf87a38ddc395643fb4
SHA512

17ab5a40c03eb9858568bda5385155ce13aea0108670d13417c002bd6ebbfaecf6fa2f0aacd991bcd2560a25daabc478494a0aa838817268892e5414552b9f7b
SSDEEP

24576:q20Iqpu2U5bOWJ8bLNXXPO21BOwDrkJp3sgXC75ld1qSVpk:q2g4bO28bL5Xm21hm30d1qapk

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
4324	file.tmp
4784	LitFiles137.exe
404	RlWSy.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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	LitFiles137.exe

Loads dropped DLL 1 IoCs

pid	Process
4324	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)\Split Files\language\is-40DHF.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-PIHKR.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-TPLIN.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-RBIQ7.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-P6SR2.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Split Files\is-TA6GM.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-7RE7H.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-RE9F4.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-HF893.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-TNSEB.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\LitFiles137.exe	file.tmp
File created	C:\Program Files (x86)\Split Files\is-FP1A6.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-IQF3C.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-5A6CU.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-5E3AQ.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
3508	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4784	LitFiles137.exe
4784	LitFiles137.exe
4784	LitFiles137.exe
4784	LitFiles137.exe
4784	LitFiles137.exe
4784	LitFiles137.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3508	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3968 wrote to memory of 4324	3968	file.exe	79
PID 3968 wrote to memory of 4324	3968	file.exe	79
PID 3968 wrote to memory of 4324	3968	file.exe	79
PID 4324 wrote to memory of 4784	4324	file.tmp	80
PID 4324 wrote to memory of 4784	4324	file.tmp	80
PID 4324 wrote to memory of 4784	4324	file.tmp	80
PID 4784 wrote to memory of 404	4784	LitFiles137.exe	81
PID 4784 wrote to memory of 404	4784	LitFiles137.exe	81
PID 4784 wrote to memory of 404	4784	LitFiles137.exe	81
PID 4784 wrote to memory of 3748	4784	LitFiles137.exe	89
PID 4784 wrote to memory of 3748	4784	LitFiles137.exe	89
PID 4784 wrote to memory of 3748	4784	LitFiles137.exe	89
PID 3748 wrote to memory of 3508	3748	cmd.exe	91
PID 3748 wrote to memory of 3508	3748	cmd.exe	91
PID 3748 wrote to memory of 3508	3748	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3968
- C:\Users\Admin\AppData\Local\Temp\is-TB97E.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-TB97E.tmp\file.tmp" /SL5="$90040,1068833,212992,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:4324
- - C:\Program Files (x86)\Split Files\LitFiles137.exe
    "C:\Program Files (x86)\Split Files\LitFiles137.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4784
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\RlWSy.exe
      4⤵
      Executes dropped EXE
      PID:404
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "LitFiles137.exe" /f & erase "C:\Program Files (x86)\Split Files\LitFiles137.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3748
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "LitFiles137.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3508

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)\Split Files\LitFiles137.exe

Filesize
1.8MB

MD5
ce3df8485ccd9940bd17bd787921fa47

SHA1
837cc62efd0208208956492c193e48314b937def

SHA256
06af0cd751110983fcd34615cd90b19df80280bc032ef2da6472e22412f7e15f

SHA512
eb102f623f9eca7a37d29e45b910f21b710d5f93ffe96394398eae7ad82f19a1c3df9648a707bd5365c9b9891d8366352934ea78f290da19b7461aa545b72139

Download Submit
C:\Program Files (x86)\Split Files\LitFiles137.exe

Filesize
1.8MB

MD5
ce3df8485ccd9940bd17bd787921fa47

SHA1
837cc62efd0208208956492c193e48314b937def

SHA256
06af0cd751110983fcd34615cd90b19df80280bc032ef2da6472e22412f7e15f

SHA512
eb102f623f9eca7a37d29e45b910f21b710d5f93ffe96394398eae7ad82f19a1c3df9648a707bd5365c9b9891d8366352934ea78f290da19b7461aa545b72139

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-LT5TL.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-TB97E.tmp\file.tmp

Filesize
695KB

MD5
415533bb40980951c966665cff9e2fe7

SHA1
fce396c8fa01876dd008f22c8be9a9b706f4aaec

SHA256
f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734

SHA512
3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-TB97E.tmp\file.tmp

Filesize
695KB

MD5
415533bb40980951c966665cff9e2fe7

SHA1
fce396c8fa01876dd008f22c8be9a9b706f4aaec

SHA256
f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734

SHA512
3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\RlWSy.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\RlWSy.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/3968-151-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/3968-132-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/3968-137-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/3968-156-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/4784-143-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/4784-142-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/4784-147-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4784-152-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/4784-155-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download

Analysis

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