nymaim | 2f05d7bb32f6d4a69839e8263b9548139dd709220b784664164529a54b7facbf

General

Target

file.exe
Size

1.8MB
MD5

9c3a561f49330834fd3f3fbf1d6f62d0
SHA1

f1ed0b7201a75a8513d9779131fd9150c0075ce8
SHA256

2f05d7bb32f6d4a69839e8263b9548139dd709220b784664164529a54b7facbf
SHA512

71ee480576fd88654d3811bf6ec4a712b6ba5c79272d615af4dcdbb24d98c8ed90a0c707508a095603c366148486357c3ae52acd0b9fecbebd8eab516818e520
SSDEEP

49152:WiflG4x66XvKCSu1ZVFTKw+Uwt5Vi/Za6:WiAE3itu7D010M6

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
4352	is-7LA2T.tmp
1968	SplitFiles119.exe
3968	sjEBFoT2oB.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-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	SplitFiles119.exe

Loads dropped DLL 1 IoCs

pid	Process
4352	is-7LA2T.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\is-B4SG2.tmp	is-7LA2T.tmp
File created	C:\Program Files (x86)\Split Files\is-R4GR6.tmp	is-7LA2T.tmp
File created	C:\Program Files (x86)\Split Files\is-0I9LB.tmp	is-7LA2T.tmp
File opened for modification	C:\Program Files (x86)\Split Files\SplitFiles119.exe	is-7LA2T.tmp
File created	C:\Program Files (x86)\Split Files\language\is-KBSHD.tmp	is-7LA2T.tmp
File created	C:\Program Files (x86)\Split Files\language\is-UBD7I.tmp	is-7LA2T.tmp
File created	C:\Program Files (x86)\Split Files\is-LLHRM.tmp	is-7LA2T.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	is-7LA2T.tmp
File created	C:\Program Files (x86)\Split Files\language\is-OAKL6.tmp	is-7LA2T.tmp
File created	C:\Program Files (x86)\Split Files\language\is-NP2MN.tmp	is-7LA2T.tmp
File created	C:\Program Files (x86)\Split Files\language\is-BC7LF.tmp	is-7LA2T.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	is-7LA2T.tmp
File created	C:\Program Files (x86)\Split Files\is-SSLM6.tmp	is-7LA2T.tmp
File created	C:\Program Files (x86)\Split Files\language\is-14D4O.tmp	is-7LA2T.tmp
File created	C:\Program Files (x86)\Split Files\language\is-N8M4M.tmp	is-7LA2T.tmp
File created	C:\Program Files (x86)\Split Files\language\is-ULP0I.tmp	is-7LA2T.tmp
File created	C:\Program Files (x86)\Split Files\language\is-LHSP7.tmp	is-7LA2T.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
2280	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1968	SplitFiles119.exe
1968	SplitFiles119.exe
1968	SplitFiles119.exe
1968	SplitFiles119.exe
1968	SplitFiles119.exe
1968	SplitFiles119.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2280	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3944 wrote to memory of 4352	3944	file.exe	80
PID 3944 wrote to memory of 4352	3944	file.exe	80
PID 3944 wrote to memory of 4352	3944	file.exe	80
PID 4352 wrote to memory of 1968	4352	is-7LA2T.tmp	81
PID 4352 wrote to memory of 1968	4352	is-7LA2T.tmp	81
PID 4352 wrote to memory of 1968	4352	is-7LA2T.tmp	81
PID 1968 wrote to memory of 3968	1968	SplitFiles119.exe	84
PID 1968 wrote to memory of 3968	1968	SplitFiles119.exe	84
PID 1968 wrote to memory of 3968	1968	SplitFiles119.exe	84
PID 1968 wrote to memory of 4740	1968	SplitFiles119.exe	90
PID 1968 wrote to memory of 4740	1968	SplitFiles119.exe	90
PID 1968 wrote to memory of 4740	1968	SplitFiles119.exe	90
PID 4740 wrote to memory of 2280	4740	cmd.exe	92
PID 4740 wrote to memory of 2280	4740	cmd.exe	92
PID 4740 wrote to memory of 2280	4740	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:3944
- C:\Users\Admin\AppData\Local\Temp\is-QTRNE.tmp\is-7LA2T.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-QTRNE.tmp\is-7LA2T.tmp" /SL4 $D004E "C:\Users\Admin\AppData\Local\Temp\file.exe" 1587277 96256
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4352
- - C:\Program Files (x86)\Split Files\SplitFiles119.exe
    "C:\Program Files (x86)\Split Files\SplitFiles119.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1968
  - - C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\sjEBFoT2oB.exe
      4⤵
      Executes dropped EXE
      PID:3968
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles119.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles119.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4740
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "SplitFiles119.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2280

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\SplitFiles119.exe

Filesize
3.1MB

MD5
02e672f108670f19e64aea70258dfa6d

SHA1
ba65a97b5da20abeb4f76229e3ab50ba6c70a572

SHA256
8caaa712bf7f5f10f600ab4f96c05a127edccaf08a48df6e9975e90db02517dc

SHA512
c409d4583966659214feb42f36deab2397cb1fc0659da5d44ea349c087fa0cd5e7fffb8a6803be1a04d322fee914b9f472e095c10410a7344f478c0eb1de8197

Download Submit
C:\Program Files (x86)\Split Files\SplitFiles119.exe

Filesize
3.1MB

MD5
02e672f108670f19e64aea70258dfa6d

SHA1
ba65a97b5da20abeb4f76229e3ab50ba6c70a572

SHA256
8caaa712bf7f5f10f600ab4f96c05a127edccaf08a48df6e9975e90db02517dc

SHA512
c409d4583966659214feb42f36deab2397cb1fc0659da5d44ea349c087fa0cd5e7fffb8a6803be1a04d322fee914b9f472e095c10410a7344f478c0eb1de8197

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-12GP2.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-QTRNE.tmp\is-7LA2T.tmp

Filesize
687KB

MD5
ec5433295f9c12c2ac5bad1a56aa05b6

SHA1
ec15e0b4f070b25a2b074c235f0d6ec0b2778000

SHA256
a726a8996bdfca72a14eed5af6c7136bd195fb6c214326c5345d7ab1f08b4f84

SHA512
c866bdd9173f2a9efb2ed515ec0fa0f597d29e28c853c37dea5e94c059ec009c32ef430ae002ceff44920a847037f1dee5b45c8e99bbed121227f41c4d3f3737

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-QTRNE.tmp\is-7LA2T.tmp

Filesize
687KB

MD5
ec5433295f9c12c2ac5bad1a56aa05b6

SHA1
ec15e0b4f070b25a2b074c235f0d6ec0b2778000

SHA256
a726a8996bdfca72a14eed5af6c7136bd195fb6c214326c5345d7ab1f08b4f84

SHA512
c866bdd9173f2a9efb2ed515ec0fa0f597d29e28c853c37dea5e94c059ec009c32ef430ae002ceff44920a847037f1dee5b45c8e99bbed121227f41c4d3f3737

Download Submit
C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\sjEBFoT2oB.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\sjEBFoT2oB.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1968-142-0x0000000000400000-0x0000000001512000-memory.dmp

Filesize
17.1MB

Download
memory/1968-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1968-143-0x0000000000400000-0x0000000001512000-memory.dmp

Filesize
17.1MB

Download
memory/1968-155-0x0000000000400000-0x0000000001512000-memory.dmp

Filesize
17.1MB

Download
memory/1968-144-0x0000000000400000-0x0000000001512000-memory.dmp

Filesize
17.1MB

Download
memory/1968-152-0x0000000000400000-0x0000000001512000-memory.dmp

Filesize
17.1MB

Download
memory/3944-136-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/3944-132-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/3944-156-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download

Analysis

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